id int64 5 1.93M | title stringlengths 0 128 | description stringlengths 0 25.5k | collection_id int64 0 28.1k | published_timestamp timestamp[s] | canonical_url stringlengths 14 581 | tag_list stringlengths 0 120 | body_markdown stringlengths 0 716k | user_username stringlengths 2 30 |
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1,866,341 | Exploring Iteration in Python: How Loops Enhance Code Efficiency | Iteration in Programming Iteration, or looping, allows programmers to repeat a specific block of... | 27,530 | 2024-05-28T09:28:00 | https://dev.to/techtobe101/exploring-iteration-in-python-how-loops-enhance-code-efficiency-56fm | computerscience, techtobe101, programming, python | _Iteration in Programming_
**Iteration**, or looping, allows programmers to repeat a specific block of code multiple times. This concept is vital for efficiency and reducing redundant coding.
### Understanding the Iteration Process
Iteration is achieved through **loop statements** like **for loops**, **while loops**, and **do-while loops**. These loops repetitively execute a block of code until a certain condition is met.
#### Types of Loops
- **For Loop**: Ideal for iterating over a known range of values.
- **While Loop**: Continues iterating as long as a specified condition remains true.
- **Do-While Loop**: Similar to while loop but guarantees at least one iteration.
### The Impact of Iteration
Iteration makes code concise and efficient, avoiding unnecessary duplication. It's fundamental in tasks like sorting algorithms, searching algorithms, and data processing.
### Summary of Key Points
- Iteration allows for repetitive execution of code.
- Common loops include for loops, while loops, and do-while loops.
- Iteration optimizes code efficiency.
---
### Case Study: Counting Program
In this case study, we'll explore the concept of iteration. Specifically we will use a loop, such as a for loop, to help in repeating tasks efficiently and optimizing code performance. This will illustrate how these constructs we discussed enhance the functionality and efficiency of our programs.
**Problem**: Write a program to count from 1 to 10.
**Solution**:
1. Use a for loop to iterate through the numbers.
2. Print each number in the sequence.
**Python Code** with Comments:
```python
# Function to count and print numbers from 1 to 10
def count_numbers():
# Loop from 1 to 10 (inclusive)
for i in range(1, 11):
print(i)
# Main program to call the count_numbers function
def main():
count_numbers()
if __name__ == "__main__":
main()
```
---
By developing a counting program using iteration, we explored the iterative nature of loops and their importance in executing repetitive tasks efficiently. Iteration is a fundamental concept in programming that enables automation of processes such as data processing, repetitive calculations, and algorithmic operations.
In the next article we'll be discussing "Combining Conditional Execution and Iteration".
---
| techtobe101 |
1,866,340 | Beginners Conditional Execution in Programming: Practical Examples and Applications | Conditional Execution in Programming Conditional execution allows programs to make decisions based... | 27,530 | 2024-05-28T09:27:40 | https://dev.to/techtobe101/beginners-conditional-execution-in-programming-practical-examples-and-applications-ac3 | computerscience, techtobe101, python, programming | _Conditional Execution in Programming_
**Conditional execution** allows programs to make decisions based on certain conditions. By using conditional statements, we can create different pathways in a program, making it more dynamic and responsive.
### The Concept of Conditional Execution
Conditional execution lets programmers execute specific statements only when certain conditions are met. Common conditional statements include **if statements**, **switch statements**, and **ternary operators**. These evaluate expressions and decide which block of code to execute based on the evaluation.
#### Importance of Conditional Execution
Conditional execution is crucial because it makes programs adaptable. For example, a weather app can display different messages based on the current temperature, or a game can adjust its difficulty based on the player's skills. This flexibility enhances the usability and functionality of applications.
### Summary of Key Points
- Conditional execution allows programs to make decisions.
- Common conditional statements include if statements and switch statements.
- Conditional execution makes programs adaptable and responsive.
---
### Case Study: Temperature-based Activity Suggestion
In this case study, we'll dive into conditional execution to understand how conditional statements like if statements and switch statements enable programs to make decisions and adapt to varying conditions. This will build on what we discussed earlier and show how these concepts are applied in practice.
**Problem**: Create a program that suggests outdoor activities based on the temperature.
**Solution**:
1. Use conditional statements to evaluate temperature ranges.
2. Recommend activities based on the current temperature.
**Python Code** with Comments:
```python
# Function to suggest an activity based on temperature
def suggest_activity(temperature):
if temperature > 30:
return "It's a hot day! Stay cool and hydrated."
elif temperature > 20:
return "It's a warm day! Enjoy the nice weather."
elif temperature > 10:
return "It's a bit chilly! Wear a jacket."
else:
return "It's cold! Stay warm and bundle up."
# Main program to input temperature and display suggested activity
def main():
temperature = float(input("Enter the current temperature: "))
print(suggest_activity(temperature))
if __name__ == "__main__":
main()
```
---
Through the temperature-based activity suggestion program, we demonstrated the practical use of conditional execution in recommending activities based on weather conditions. By understanding how conditional statements work, programmers can create applications that respond dynamically to changing circumstances, enhancing user experience and functionality.
In the next article in our series, we will take a closer look at "Iteration in Programming".
---
| techtobe101 |
1,867,441 | OTT App Solutions To Build an Android TV & Smart TV Apps in 2025 | The living room is experiencing a digital transformation. Consumers are increasingly abandoning... | 0 | 2024-05-28T09:27:12 | https://dev.to/markpeterson/ott-app-solutions-to-build-an-android-tv-smart-tv-apps-in-2025-3h9c | development | The living room is experiencing a digital transformation. Consumers are increasingly abandoning traditional cable and satellite TV in favor of Over-The-Top (OTT) streaming services. As a result, the demand for high-quality, user-friendly OTT apps designed specifically for Android TV and Smart TVs is skyrocketing.
This blog serves as a comprehensive guide for businesses leveraging OTT app development solutions to build successful Android TV and Smart TV apps in 2025 and beyond. We'll explore the key considerations, cutting-edge technologies, and **[future trends shaping](https://techplanet.today/post/the-ultimate-guide-to-custom-ott-development-in-market-insights-and-trends)** the evolving landscape of Smart TV app development.
## Why OTT App Development Matters
The rise of OTT streaming has transformed the way consumers consume content. With the proliferation of smart TVs and streaming devices, users now have access to a vast array of content from various platforms. This shift has created a significant opportunity for businesses to develop OTT apps that offer unique and engaging content experiences.
##The Growing Importance of Android TV and Smart TV
Android TV and Smart TV platforms have revolutionized the way audiences consume content, offering a seamless and immersive viewing experience. These platforms provide access to a wide range of applications, including streaming services, games, and utility apps, directly on the television screen. As the living room becomes the central hub for entertainment, developing high-quality apps for Android TV and Smart TV is a strategic priority for content providers and OTT platform solutions providers.
## Understanding the Android TV and Smart TV Landscape:
- Fragmentation: The Smart TV market is fragmented, with various platforms and operating systems dominating different regions. While Android TV holds a significant share, understanding your target market's dominant Smart TV platforms is crucial.
- Hardware Variations: Smart TV hardware capabilities vary greatly. Developing an app that functions seamlessly across a range of processing power, memory limitations, and screen resolutions requires a robust and adaptable development approach.
- Evolving User Expectations: Smart TV users have become accustomed to sleek, intuitive user interfaces (UI) and voice search functionalities. Building an app that delivers a smooth and user-friendly experience is paramount.
## Key Considerations for Building Android TV & Smart TV Apps in 2025:
- Focus on User Experience (UX): Prioritize an intuitive and streamlined UI optimized for remote control navigation and voice search. Ensure quick and easy content discovery, playback controls, and seamless transitions between features.
- Content Security and DRM: Implement robust Digital Rights Management (DRM) solutions to protect premium content and comply with licensing agreements. Partner with OTT platform solutions providers experienced in secure content delivery for Smart TVs.
- Monetization Strategies: Consider diverse monetization models beyond traditional subscriptions. Explore in-app purchases, targeted advertising, or tiered subscription plans offering different levels of content access.
- Offline Viewing Capabilities: Cater to users with limited internet access by enabling offline viewing of downloaded content.
- Integration with Smart TV Features: Leverage built-in Smart TV features like Bluetooth gamepads or casting functionalities for a more interactive and engaging user experience.
## Emerging Technologies Shaping OTT App Development:
- AI-Powered Recommendations: Incorporate AI algorithms to personalize content recommendations based on user viewing history and preferences.
- Cloud Gaming Integration: As cloud gaming platforms gain traction, consider integrating cloud gaming capabilities directly into your OTT app, offering a one-stop shop for entertainment.
- Voice Search Advancements: Voice search will likely become even more prominent in Smart TV navigation. Optimize your app for voice search queries and ensure quick and accurate responses.
## OTT App Development Solutions for Android TV & Smart TV Apps:
Partnering with a reputable OTT app development company offers several advantages:
- Expertise in Cross-Platform Development: Navigate the complexities of developing for multiple Smart TV platforms while ensuring a consistent user experience across different devices.
- Experience with UI/UX Design for Smart TVs: Leverage specialists who understand the unique design considerations for remote control navigation and user interaction on a larger screen.
- Security and DRM Integration: Benefit from expertise in implementing robust security and DRM solutions to protect content and user data.
- App Store Optimization (ASO): Leverage expertise in optimizing your app listing across different Smart TV app stores to increase discoverability.
## Building a Future-Proof OTT App:
- Scalability and Performance: Design your app with scalability in mind, anticipating future growth and the potential addition of new features.
- Data-Driven Optimization: Integrate analytics tools to track user behavior, content consumption patterns, and app performance. Use data insights to inform ongoing optimization efforts.
- Staying Ahead of the Curve: The Smart TV landscape is constantly evolving. Partner with an **[OTT app development company](https://www.code-brew.com/ott-app-development-company)** that actively monitors industry trends and integrates cutting-edge technologies into your app.
## Conclusion:
By understanding the unique requirements of Android TV and Smart TV development, and by leveraging the expertise of OTT app development solutions providers, businesses can build captivating and successful OTT apps that capture the living room experience in 2025 and beyond. Focusing on a user-centric approach, prioritizing security, and embracing emerging technologies will help you develop an app that stands out in a competitive market and attracts a loyal user base.
Remember, a well-crafted OTT app can become a gateway to a world of entertainment for Smart TV users, generating valuable recurring revenue streams for your business.
| markpeterson |
1,866,337 | An Introduction to Conditional Execution & Iteration in Computer Science | Computer science is a fascinating field that encompasses various aspects of problem-solving and... | 27,530 | 2024-05-28T09:27:11 | https://dev.to/techtobe101/an-introduction-to-conditional-execution-iteration-in-computer-science-3jgo | computerscience, techtobe101, python, programming | Computer science is a fascinating field that encompasses various aspects of problem-solving and logical thinking. One fundamental concept in computer science is conditional execution and iteration. In this article series, we will delve into the basics of computer science, explore the concepts of conditional execution and iteration, and discuss their interplay, common challenges, and solutions.
## Understanding the Basics of Computer Science
### An Introduction to Conditional Execution & Iteration in Computer Science
**Computer science** is a field that involves solving problems using algorithms and logical thinking. Two key concepts in computer science are **conditional execution** and **iteration**. In this series, we will explore these concepts step-by-step.
### Understanding the Basics of Computer Science
**Computer science** is the study of algorithms—step-by-step instructions designed to solve specific problems. These algorithms are the foundation of computer programming and are used to create efficient and reliable software systems.
#### The Role of Algorithms
Algorithms are essential in computer science because they enable programmers to solve problems efficiently. They combine logic, mathematics, and creativity. With a well-defined algorithm, computer programs can take input data and produce the desired output, making them versatile tools in various fields like artificial intelligence and data analysis.
#### Key Concepts in Programming
Before diving into conditional execution and iteration, let's understand some basic programming concepts:
1. **Programming Languages**: These are tools like C++, Java, and Python that allow humans to communicate instructions to computers.
2. **Variables**: These store data values that can be used and manipulated in calculations. For example, a variable can store the temperature in a weather app.
3. **Functions**: These are reusable blocks of code that perform specific tasks, helping to organize and modularize code. For instance, a function in a banking app can calculate interest rates.
### Summary of Key Points
- Algorithms are the heart of computer science.
- Programming languages enable communication with computers.
- Variables store data, and functions perform specific tasks.
---
### Case Study: Building a Simple Calculator
Now, let's dive into a case study to quickly review the basics of computer science. Just as we discussed earlier, our goal is to refresh your memory on the key components of modular programming, specifically focusing on programming languages (python), variables, and functions. This case study will help illustrate how these elements form the essential foundation of a program. We'll discuss a problem & how to solve it using code.
**Problem**: Create a basic calculator that can perform addition, subtraction, multiplication, and division.
**Solution**:
1. Define functions to handle each operation.
2. Use user input to determine the operation.
3. Display the result based on the chosen operation.
**Python Code** with Comments:
```python
# Function to add two numbers
def add(x, y):
return x + y
# Function to subtract two numbers
def subtract(x, y):
return x - y
# Function to multiply two numbers
def multiply(x, y):
return x * y
# Function to divide two numbers
def divide(x, y):
# Check for division by zero
if y != 0:
return x / y
else:
return "Error! Division by zero."
# Main program to handle user input and operation choice
def main():
print("Select operation:")
print("1. Add")
print("2. Subtract")
print("3. Multiply")
print("4. Divide")
choice = input("Enter choice (1/2/3/4): ")
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))
# Perform the chosen operation based on user input
if choice == '1':
print(num1, "+", num2, "=", add(num1, num2))
elif choice == '2':
print(num1, "-", num2, "=", subtract(num1, num2))
elif choice == '3':
print(num1, "*", num2, "=", multiply(num1, num2))
elif choice == '4':
print(num1, "/", num2, "=", divide(num1, num2))
else:
print("Invalid input")
if __name__ == "__main__":
main()
```
---
In this article, we implemented a simple calculator program using conditional execution and user-defined functions. Through this case study, we observed how to structure a program to handle different operations based on user input. Understanding these foundational concepts is crucial for building more complex applications in computer science.
In the next article in our series, we will take a closer look at "Conditional Execution in Programming".
--- | techtobe101 |
1,867,440 | What are types of Authentication | Understanding the Different Types of Authentication In today's digital age, safeguarding... | 0 | 2024-05-28T09:26:26 | https://dev.to/blogginger/what-are-types-of-authentication-4f06 | authentication | ## Understanding the Different Types of Authentication
In today's digital age, safeguarding data is more crucial than ever. Authentication, the process of verifying a user's identity, is a cornerstone of cybersecurity. Let's explore the various types of authentication methods available and their significance in protecting information.
### 1. **Password-Based Authentication**
**Password-Based Authentication** is the most common form. Users create a unique password to gain access to systems or accounts. Despite its popularity, it has several drawbacks, such as susceptibility to hacking, phishing, and brute force attacks. To enhance security, many organizations enforce strong password policies, including complexity requirements and regular updates.
### 2. **Two-Factor Authentication (2FA)**
**Two-Factor Authentication (2FA)** adds an extra layer of security by requiring two forms of verification. Typically, it combines something the user knows (password) with something the user has (a mobile device). Common examples include receiving a one-time code via SMS or using an authentication app. This method significantly reduces the risk of unauthorized access.
### 3. **Multi-Factor Authentication (MFA)**
**Multi-Factor Authentication (MFA)** extends the concept of 2FA by incorporating more than two verification methods. It might involve a password, a physical token, and biometric verification. MFA provides a higher level of security, making it more challenging for attackers to compromise all required factors.
### 4. **Biometric Authentication**
**Biometric Authentication** uses unique biological characteristics to verify identity. Common biometric methods include fingerprint scanning, facial recognition, and iris scanning. [Biometric authentication](https://www.authx.com/biometric-authentication/?utm_source=devto&utm_medium=SEO&utm_campaign=blog&utm_id=K003) is highly secure because it relies on traits that are difficult to replicate. However, privacy concerns and the need for specialized hardware can be barriers to widespread adoption.
### 5. **Token-Based Authentication**
**Token-Based Authentication** involves using a physical device or software token that generates a unique code at regular intervals. Examples include hardware tokens provided by security firms and software tokens generated by apps like Google Authenticator. Tokens are often used in conjunction with passwords for enhanced security.
### 6. **Certificate-Based Authentication**
**Certificate-Based Authentication** uses digital certificates issued by trusted certificate authorities (CAs) to verify a user's identity. Users are granted certificates that act as a digital ID, ensuring secure communication and authentication. This method is commonly used in secure email communications and VPNs.
### 7. **Single Sign-On (SSO)**
**Single Sign-On (SSO)** allows users to authenticate once and gain access to multiple related systems. This method simplifies the login process and enhances user experience. [SSO authentication](https://www.authx.com/single-sign-on/?utm_source=devto&utm_medium=SEO&utm_campaign=blog&utm_id=K003) uses tokens that are shared between services, reducing the need to remember multiple passwords. However, if the SSO credentials are compromised, it can lead to broader security risks.
### 8. **OAuth and OpenID Connect**
**OAuth** is an open standard for token-based authentication and authorization. It allows third-party services to exchange information without exposing user passwords. **OpenID Connect** builds on OAuth 2.0, providing an identity layer for verifying user identity. These methods are widely used in social logins, where users can log in using their credentials from services like Google or Facebook.
### 9. **Behavioral Authentication**
**Behavioral Authentication** analyzes user behavior patterns, such as typing speed, mouse movements, and navigation habits, to verify identity. This method is passive and non-intrusive, continuously monitoring for unusual behavior that might indicate a compromised account. It's increasingly used in financial services and other high-security environments.
### Conclusion
Choosing the right type of authentication depends on the specific needs and risks of an organization. While no single method is foolproof, combining multiple authentication methods can significantly enhance security. As cyber threats evolve, so too must our approaches to authentication, ensuring we stay one step ahead in protecting sensitive information.
By understanding and implementing these various authentication methods, individuals and organizations can better safeguard their digital assets and ensure a more secure online environment. | blogginger |
1,867,439 | How to Beat Scorpion Sentinel - Boss Guide and Tips | Final Fantasy VII Remake follows the story of Cloud Strife, an ex-soldier turned mercenary, who joins... | 0 | 2024-05-28T09:26:18 | https://dev.to/patti_nyman_5d50463b9ff56/how-to-beat-scorpion-sentinel-boss-guide-and-tips-f68 | Final Fantasy VII Remake follows the story of Cloud Strife, an ex-soldier turned mercenary, who joins the eco-terrorist group Avalanche to stop the Shinra Electric Power Company from draining the planet's life energy. The game is set in the dystopian city of Midgar, where the conflict between Shinra and Avalanche escalates, leading to epic battles and profound revelations.
Basic Gameplay:
Players control Cloud and his allies as they explore Midgar, engage in real-time combat, and navigate through a richly detailed world filled with side quests, mini-games, and hidden secrets. The game seamlessly blends action, exploration, and storytelling, offering a captivating experience for fans and newcomers alike.
Encounter: Scorpion Sentinel - Boss
Role and Attributes:
The Scorpion Sentinel is a formidable boss encountered early in the game, serving as a mechanical guardian deployed by Shinra to protect their interests. It possesses high defense, long-range attacks, and formidable melee capabilities, posing a significant threat to the party.
Unlocking and Route to Scorpion Sentinel:
To encounter the Scorpion Sentinel, players must progress through the main story until they reach the Mako Reactor 1. Upon reaching the reactor's core, players will face off against this imposing foe.
Signs and Symbols to Reach the Boss:
Players will be guided to the Scorpion Sentinel encounter by following the linear path within the Mako Reactor 1. As they progress deeper into the reactor, they will encounter scripted events and cinematic sequences that lead up to the boss battle.
Entering Battle Mode:
The transition to battle mode is signaled by a dramatic shift in the music, accompanied by a cinematic sequence showing the Scorpion Sentinel's activation. Players should prepare themselves by ensuring their characters are equipped with suitable weapons, armor, and material.
Recommended Characters:
Cloud, with his balanced stats and proficiency in close combat, is an essential choice for this encounter. Additionally, players may consider including Barret for his ranged attacks and ability to draw enemy fire, providing cover for Cloud and other party members.
Defeating the Adentus Guild Boss:
Skills Overview:
The Scorpion Sentinel possesses a variety of skills, including tail laser, energy blast, and stinger strike. Each skill presents a different threat level and requires a unique approach to avoid.
Identifying Signals for Fatal Damage:
Players should be vigilant for warning signs, such as the Scorpion Sentinel raising its tail or charging energy, indicating an imminent devastating attack.
Dodging Fatal Skills:
To evade fatal attacks, players must time their dodges carefully or take cover behind obstacles in the environment. Additionally, utilizing Barret's Cover ability can help mitigate damage and protect vulnerable party members.
Detailed Recommendations and Strategies for Defeating the Adentus Guild Boss
Recommended Characters and Strategies:
Cloud Strife: Utilize Cloud's balanced stats and proficiency in close combat to deal consistent damage to the boss. Prioritize using his Braver ability to stagger the boss and open up opportunities for more powerful attacks.
Barret Wallace: Position Barret strategically to draw enemy fire away from Cloud and other party members. Take advantage of his ranged attacks to chip away at the boss's health from a safe distance.
Tifa Lockhart (if available): Tifa's agility and combo-based attacks make her a valuable asset in this battle. Focus on building up her Unbridled Strength ability to unleash devastating combos on the boss.
Key Operating Techniques:
Staggering the Boss: Focus on staggering the boss by exploiting its weaknesses and using abilities that inflict high stagger damage.
Dodging and Blocking: Time dodges and blocks effectively to minimize damage from the boss's powerful attacks.
Utilizing Abilities: Make strategic use of each character's abilities and limit breaks to maximize damage output and control the flow of battle.
Understanding Skill Damage Structure:
Tail Laser: A long-range laser attack that targets a single character. Can be dodged by moving out of the line of fire.
Energy Blast: Unleashes a powerful energy blast that damages all party members in its area of effect. Take cover behind obstacles or use Barret's Cover ability to mitigate damage.
Stinger Strike: Lunges forward with its stinger, inflicting heavy damage on a single target. Keep a close eye on the boss's movements and dodge or block the attack accordingly.
Critical Elements for Damage Output:
Exploiting Weaknesses: Identify and exploit the boss's vulnerabilities to increase damage output and stagger meter buildup.
Maintaining Pressure: Keep the pressure on the boss by maintaining a steady stream of attacks and avoiding unnecessary downtime.
Adentus Guild Boss Behavior Changes:
Phase Transitions: As the battle progresses, the boss may enter different phases, altering its attack patterns and behavior. Stay adaptable and adjust your tactics accordingly.
Increased Aggression: Expect the boss to become more aggressive and unleash more powerful attacks as its health dwindles. Stay focused and maintain control of the battle.
Rewards and Utilization:
Upon defeating the Adentus Guild Boss, players can expect to receive valuable rewards such as rare material, equipment, and Gil. These rewards can be used to enhance character abilities, customize equipment, and purchase items from shops throughout the game.
Avoiding Common Mistakes and Misconceptions:
Ignoring Weaknesses: Take advantage of the boss's weaknesses and vulnerabilities to increase damage output and stagger meter buildup.
Underestimating Defensive Options: Utilize dodges, blocks, and cover effectively to minimize damage taken and maintain party survivability.
Neglecting Party Composition: Ensure your party composition is well-balanced and equipped to handle the boss's various attacks and abilities.
By implementing these recommendations and strategies, players can overcome the challenges posed by the Adentus Guild Boss and emerge victorious, reaping the rewards and progressing further in the captivating world of Final Fantasy VII Remake.
At mmowow, we offer a range of cheap PSN gift cards to help you unlock more gaming fun and play Final Fantasy VII Remake and other popular titles by using PSN gift cards. Whether you choose to gift for holidays and special occasions or purchase discounted games and promotional items, our gift cards offer great value and are designed to fit your needs. | patti_nyman_5d50463b9ff56 | |
1,867,437 | Elevate Your Convenience with a Mobile Charging Kiosk | In our fast-paced, technology-dependent world, keeping devices charged and ready for use is... | 0 | 2024-05-28T09:24:35 | https://dev.to/addsofttech/elevate-your-convenience-with-a-mobile-charging-kiosk-4fol | In our fast-paced, technology-dependent world, keeping devices charged and ready for use is essential. Whether in bustling shopping malls, busy airports, educational institutions, or large event venues, the demand for accessible charging solutions is on the rise. Mobile charging kiosks offer an ideal solution, providing a secure, convenient, and efficient way for people to recharge their devices on the go. This article delves into the features, benefits, and key considerations for implementing mobile charging kiosks in various environments.
**What is a Mobile Charging Kiosk?**
A mobile charging kiosk is a self-service station equipped with multiple charging ports and secure compartments for charging electronic devices like smartphones, tablets, and laptops. These kiosks are designed to be placed in high-traffic public areas, offering a valuable service to users who need to recharge their devices quickly and safely.
Key Features of Mobile Charging Kiosks
**1. Multiple Charging Options**
Mobile charging kiosks are equipped with a variety of charging ports to accommodate different devices. Common options include:
**• USB-A and USB-C Ports:** For charging most smartphones and tablets.
**• Wireless Charging Pads:** For devices that support wireless charging.
**• AC Power Outlets: **For charging laptops and other larger devices.
**2. Secure Lockers**
To ensure the safety of users' devices, many kiosks come with individual secure lockers. Each locker typically features:
**• Digital Keypads or RFID Locks:** Allowing users to set a personal code or use an RFID card to lock and unlock the compartment.
• Sturdy Construction: Made from durable materials to prevent tampering and theft.
**3. User-Friendly Interface**
Modern charging kiosks are designed with user convenience in mind, often featuring:
**• Touchscreen Displays:** Providing easy-to-follow instructions and real-time charging status updates.
**• Multilingual Support:** Catering to a diverse user base.
**4. Remote Monitoring and Management**
Operators can monitor and manage kiosks remotely, which includes:
• **Usage Statistics:** Tracking how often and which ports are used.
**
• Maintenance Alerts:** Notifying when a kiosk requires servicing.
**• Software Updates:** Ensuring the system runs efficiently and securely.
**5. Advertising Capabilities**
Many kiosks include digital screens that can display advertisements, offering:
**• Additional Revenue Streams:** By selling ad space to third parties.
**• Promotion of In-House Services:** Advertising products or services directly to users.
Benefits of Mobile Charging Kiosks
**1. Convenience for Users**
Mobile charging kiosks provide a much-needed service in public places, allowing people to charge their devices while they go about their day. This convenience is particularly valuable in environments where access to power outlets is limited.
**2. Increased Foot Traffic and Engagement**
Placing charging kiosks in strategic locations can attract more visitors and encourage them to stay longer, which is beneficial for businesses and venues. For instance, in a retail setting, customers might spend more time shopping while their devices charge.
**3. Enhanced Customer Experience**
Offering a charging solution enhances the overall customer experience, showing that you value their needs. This can lead to increased customer satisfaction and loyalty.
**4. Security and Peace of Mind**
Secure lockers ensure that users can leave their devices to charge without worrying about theft or damage. This added security is a significant advantage in busy public areas.
**5. Revenue Opportunities**
The ability to display advertisements on the kiosk’s digital screens provides an additional revenue stream. Businesses can sell ad space to third parties or use it to promote their own products and services.
Considerations for Implementing a Mobile Charging Kiosk
**1. Location**
Selecting the right location is crucial. Ideal spots are high-traffic areas where people are likely to need charging services, such as shopping malls, airports, train stations, universities, and event venues. Ensure the kiosk is easily accessible and visible.
**2. Security Features**
Ensure the kiosk has robust security features to protect users' devices. This includes secure lockers with reliable locking mechanisms and sturdy construction to prevent tampering.
**3. Compatibility**
Choose a kiosk that offers a variety of charging options to accommodate different devices. This ensures that users can charge any device they have, from smartphones to laptops.
**4. Maintenance and Support**
Opt for kiosks that offer remote monitoring and management capabilities. This simplifies maintenance and ensures that any issues can be addressed promptly. Reliable technical support from the manufacturer is also essential.
**5. Cost and Return on Investment (ROI)**
Evaluate the cost of the kiosk and potential return on investment. Consider not only the direct revenue from charging fees or advertising but also the indirect benefits such as increased foot traffic and enhanced customer satisfaction.
Mobile charging kiosks are an innovative solution to meet the growing demand for on-the-go device charging. By providing a secure, convenient, and user-friendly charging option, these kiosks enhance the customer experience, attract more visitors, and offer potential revenue opportunities. Whether in retail environments, transportation hubs, educational institutions, or event venues, investing in mobile charging kiosks can significantly improve service offerings and customer satisfaction.
| addsofttech | |
1,867,436 | What is GPU Mining? | GPU mining reduces the entry hurdles for new cryptocurrency miners. For example, it eliminates the... | 0 | 2024-05-28T09:24:15 | https://dev.to/lillywilson/what-is-gpu-mining-3c7n | cryptocurrency, bitcoin, asic | **[GPU mining ](https://asicmarketplace.com/blog/gpu-vs-asic-mining/)**reduces the entry hurdles for new cryptocurrency miners. For example, it eliminates the need for expensive hardware or a greater range of coins to mine. Some GPU miners refer to this as a gateway into cryptocurrency mining.
The majority of aspiring miners have a GPU that they can use to mine, and it is fairly easy to set up a GPU-mining setup. Most big-box electrical stores and online marketplaces carry GPUs.
The configuration of GPU mining tools is also much easier to do now than it was in the early days when Bitcoin mining began. No longer do you need to be a Linux expert to configure GPU mining software. Today, GPU mining software is available for Windows computers with just one click. Older laptops are also able to use the program. | lillywilson |
1,867,366 | 📊📈 Create charts using Recharts | Introduction Charts make it easy to represent complex data in a simple and... | 0 | 2024-05-28T08:31:56 | https://refine.dev/blog/recharts/ | webdev, beginners, react, css |
<a href="https://github.com/refinedev/refine">
<img src="https://refine.ams3.cdn.digitaloceanspaces.com/readme/refine-readme-banner.png" alt="refine repo" />
</a>
---
## Introduction
Charts make it easy to represent complex data in a simple and visually appealing way. With charts, you can easily identify trends and patterns and make comparisons across different variables and data types. You can use charts to interpret current data and predict the future.
There are several types of charts you can use to visually represent data. Some of them include Line Charts, Bar Charts, Area Charts, and Scatter charts. The choice of a chart largely depends on the type of data. Different types of charts are suited for different purposes.
There are several libraries for creating charts in the React ecosystem. These React chart libraries include react-flow-charts, react-financial-charts, react-charts and Recharts. In this article, we will explore how to create charts in a Refine project using [Recharts](https://recharts.org/).
## What is Recharts
<div className="centered-image">
<img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2024-02-23-recharts/recharts.png" alt="Recharts chart" />
</div>
Recharts is a popular, MIT-licensed library for creating charts in React and React-based frameworks like refine. Internally, it uses SVG and some lightweight D3 packages as its dependencies.
Recharts has several built-in components that you can compose to create some of the commonest charts such as Area charts, Bar charts, Pie charts, and Line charts.
As an example, the code below illustrates how you can use Rechart's built-in components to create a Bar chart. The component names are self-explanatory.
```tsx
import {
BarChart,
CartesianGrid,
XAxis,
YAxis,
Tooltip,
Legend,
Bar,
} from "recharts";
<BarChart width={730} height={250} data={data}>
<CartesianGrid strokeDasharray="3 3" />
<XAxis dataKey="name" />
<YAxis />
<Tooltip />
<Legend />
<Bar dataKey="pv" fill="#8884d8" />
<Bar dataKey="uv" fill="#82ca9d" />
</BarChart>;
```
## How to create a Refine project
In this section, we will create a refine demo project.
```sh
npm create refine-app@latest
```
Select the options below when prompted by the command line tool.
```txt
✔ Choose a project template · Vite
✔ What would you like to name your project?: · refine-recharts-demo
✔ Choose your backend service to connect: · REST API
✔ Do you want to use a UI Framework?: · Material UI
✔ Do you want to add example pages?: · Yes
✔ Do you need any Authentication logic?: · No
✔ Choose a package manager: · npm
```
After setting up the project and installing dependencies, use the command below to launch the development server.
```sh
npm run dev
```
Later in this article, we will create charts using Recharts and render them in a dashboard. Let's add a dashboard to the project we have just created.
Create the `src/pages/dashboard/list.tsx` file. Copy and paste the code below into it. Be aware that the `dashboard` directory doesn't exist yet. You need to first create it.
```tsx title="src/pages/dashboard/list.tsx"
import React from "react";
export const DashboardPage: React.FC = () => {
return <p>Hello world!</p>;
};
```
The component above renders a simple "Hello world!" text at the moment. We will add more code to it later. Now we need to export the component above. Create the `src/pages/dashboard/index.ts` file. Copy and paste the code below into it.
```ts
// src/pages/dashboard/index.ts
export { DashboardPage } from "./list";
```
You can now import the `DashboardPage` component we created above and render it in the `<App />` component. Add the changes below to the `src/App.tsx` file.
```tsx
//src/App.tsx
...
//highlight-next-line
import { DashboardPage } from "./pages/dashboard";
function App() {
return (
<BrowserRouter>
<RefineKbarProvider>
<ColorModeContextProvider>
<CssBaseline />
<GlobalStyles styles={{ html: { WebkitFontSmoothing: "auto" } }} />
<RefineSnackbarProvider>
<DevtoolsProvider>
<Refine
//highlight-start
dataProvider={{
default: dataProvider("https://api.fake-rest.refine.dev"),
metrics: dataProvider("https://api.finefoods.refine.dev"),
}}
//highlight-end
notificationProvider={notificationProvider}
routerProvider={routerBindings}
resources={[
{
name: "blog_posts",
list: "/blog-posts",
create: "/blog-posts/create",
edit: "/blog-posts/edit/:id",
show: "/blog-posts/show/:id",
meta: {
canDelete: true,
},
},
{
name: "categories",
list: "/categories",
create: "/categories/create",
edit: "/categories/edit/:id",
show: "/categories/show/:id",
meta: {
canDelete: true,
},
},
//highlight-start
{
name: "dashboard",
list: "/dashboard",
meta: {
label: "Dashboard",
dataProviderName: "metrics",
},
},
//highlight-end
]}
options={{
syncWithLocation: true,
warnWhenUnsavedChanges: true,
useNewQueryKeys: true,
projectId: "5l4F52-JwXWMu-eZRGwA",
}}
>
<Routes>
<Route
element={
<ThemedLayoutV2 Header={() => <Header sticky />}>
<Outlet />
</ThemedLayoutV2>
}
>
<Route
index
element={<NavigateToResource resource="blog_posts" />}
/>
...
//highlight-start
<Route path="/dashboard">
<Route index element={<DashboardPage />} />
</Route>
//highlight-end
<Route path="*" element={<ErrorComponent />} />
</Route>
</Routes>
<RefineKbar />
<UnsavedChangesNotifier />
<DocumentTitleHandler />
</Refine>
<DevtoolsPanel />
</DevtoolsProvider>
</RefineSnackbarProvider>
</ColorModeContextProvider>
</RefineKbarProvider>
</BrowserRouter>
);
}
export default App;
```
In the code above, we added another data provider. The data provider will fetch data from the [fast foods API](https://api.finefoods.refine.dev). It's a dummy API created by the refine team. You can use it to create simple projects when testing out refine. We will use the API to create charts later.
You will now see a dashboard entry in the sidebar. The dashboard will look like the image below. We will create charts and render them in the dashboard in the next sub-sections.
<div className="centered-image">
<img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2024-02-23-recharts/dashboard.png" alt="Recharts chart" />
</div>
Before we start creating charts, let's create a simple interface for the data from our API. Create the `src/interfaces/index.d.ts` file. Copy and paste the interface below into it.
```ts
// src/interfaces/index.d.ts
export interface IQueryResult {
date: string;
value: number;
}
```
## How to install Recharts
You can install Recharts either from the npm package registry or get its UMD build via a CDN. Depending on your package manager, use one of the commands below to install Recharts.
```sh
npm install recharts
```
## Create a Line chart using Recharts
Line charts consist of a series of data points connected using line segments. They are mostly used to represent time series data. You can use Rechart's built-in `<LineChart />` component to create a Line chart like so:
```tsx
<LineChart
width={730}
height={250}
data={data}
margin={{ top: 5, right: 30, left: 20, bottom: 5 }}
>
<CartesianGrid strokeDasharray="3 3" />
<XAxis dataKey="name" />
<YAxis />
<Tooltip />
<Legend />
<Line type="monotone" dataKey="value" stroke="#8884d8" />
</LineChart>
```
Charts in general need to have features such as axes, Cartesian grid, legend, and tooltips. Therefore, we need to use the `<LineChart />` component with Rechart's built-in general and Cartesian components as in the example above.
The `<LineChart />` component has the `data` prop for passing the data you want to represent on the Line chart. The data should be an array of objects like in the example below.
```tsx
[
{ name: "a", value: 16 },
{ name: "b", value: 12 },
{ name: "c", value: 18 },
];
```
Let's create a simple Line chart in our refine project. We will render it in the dashboard we created above. Start by creating the `src/pages/dashboard/charts/line-chart.tsx` file. Copy and paste the code below into it. The `charts` directory doesn't exist yet. Start by creating it.
```tsx
// src/pages/dashboard/charts/line-chart.tsx
import React from "react";
import {
LineChart,
Line,
XAxis,
YAxis,
Tooltip,
ResponsiveContainer,
} from "recharts";
import { IQueryResult } from "../../../interfaces";
export const LineChartComponent: React.FC<{
dailyOrders: IQueryResult[];
}> = ({ dailyOrders }) => {
return (
<ResponsiveContainer width="100%" height="100%" aspect={500 / 300}>
<LineChart
width={500}
height={300}
data={dailyOrders}
margin={{
top: 5,
right: 30,
left: 20,
bottom: 5,
}}
>
<XAxis dataKey="date" />
<YAxis />
<Tooltip />
<Line type="monotone" dataKey="value" stroke="#82ca9d" />
</LineChart>
</ResponsiveContainer>
);
};
```
In the example above, the `<LineChart />` component is wrapped in a responsive container. We will do the same while creating other charts later. We need to export the component we created above so that we can easily import and render it anywhere in our project. Create the `src/pages/dashboard/charts/index.ts` file. Copy and paste the code below into it.
```ts
// src/pages/dashboard/charts/index.ts
export { LineChartComponent } from "./line-chart";
```
Let's now import the above component and render it in the `<DashboardPage />` component. Copy and paste the code below into the `src/pages/dashboard/list.tsx` file.
```tsx
// src/pages/dashboard/list.tsx
import React from "react";
import { Grid } from "@mui/material";
import { useApiUrl, useCustom } from "@refinedev/core";
import dayjs from "dayjs";
const query = {
start: dayjs().subtract(7, "days").startOf("day"),
end: dayjs().startOf("day"),
};
import { LineChartComponent } from "./charts";
import { IQueryResult } from "../../interfaces";
export const formatDate = new Intl.DateTimeFormat("en-US", {
month: "short",
year: "numeric",
day: "numeric",
});
const transformData = (data: IQueryResult[]): IQueryResult[] => {
return data.map(({ date, value }) => ({
date: formatDate.format(new Date(date)),
value,
}));
};
export const DashboardPage: React.FC = () => {
const API_URL = useApiUrl("metrics");
const { data: dailyRevenue } = useCustom({
url: `${API_URL}/dailyRevenue`,
method: "get",
config: {
query,
},
queryOptions: {
select: ({ data }) => {
return { data: transformData(data.data) };
},
},
});
const { data: dailyOrders } = useCustom({
url: `${API_URL}/dailyOrders`,
method: "get",
config: {
query,
},
queryOptions: {
select: ({ data }) => {
return { data: transformData(data.data) };
},
},
});
const { data: newCustomers } = useCustom({
url: `${API_URL}/newCustomers`,
method: "get",
config: {
query,
},
queryOptions: {
select: ({ data }) => {
return { data: transformData(data.data) };
},
},
});
return (
<Grid
container
justifyContent="baseline"
alignItems={"stretch"}
spacing={2}
>
<Grid item xs={12} sm={6}>
<LineChartComponent dailyOrders={dailyOrders?.data ?? []} />
</Grid>
</Grid>
);
};
```
In the code above, we are using the `useCustom` hook to make custom query requests to the backend. The `useCustom` hook uses TanStack Query's `useQuery` hook under the hook. We have been querying the daily revenue, daily orders, and new customers of a restaurant business for the last seven days. We will represent the data in different types of charts. The dashboard should now have a Line chart that looks like the image below.
<div className="centered-image">
<img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2024-02-23-recharts/line-chart.png" alt="Recharts chart" />
</div>
There are several Line chart variants you can create using Rechart's built-in components. For more complex charts, check out the Recharts documentation.
## Create Area chart using Recharts
Recharts has the built-in `<AreaChart />` component for creating area charts. You can compose the built-in `<AreaChart />` component to create complex area charts in your React project.
You can use the `<AreaChart />` component's `data` prop to pass the data you want to represent on an area chart. Like in the previous example, your data should be an array of objects.
```tsx
[
{ name: "Name A", data: 4000 },
{ name: "Name B", data: 3000 },
];
```
To represent the above data in an area chart, you can use the `<AreaChart />` component as in the example below. As before, the component names are self-explanatory.
```tsx
<AreaChart
width={500}
height={300}
data={data}
margin={{
top: 10,
right: 30,
left: 0,
bottom: 0,
}}
>
<XAxis dataKey="name" />
<YAxis />
<Tooltip />
<Area type="monotone" dataKey="data" stroke="#8884d8" fill="#8884d8" />
</AreaChart>
```
Let's now add an area chart to the refine project we created above. Create the `src/pages/dashboard/charts/area-chart.tsx` file. Copy and paste the code below into it.
```tsx
// dashboard/charts/area-chart.tsx
import {
AreaChart,
Area,
XAxis,
YAxis,
Tooltip,
ResponsiveContainer,
} from "recharts";
import { IQueryResult } from "../../../interfaces";
export const AreaChartComponent: React.FC<{ dailyRevenue: IQueryResult[] }> = ({
dailyRevenue,
}) => {
return (
<ResponsiveContainer width="100%" height="100%" aspect={500 / 300}>
<AreaChart
width={500}
height={300}
data={dailyRevenue}
margin={{
top: 10,
right: 30,
left: 0,
bottom: 0,
}}
>
<XAxis dataKey="date" />
<YAxis />
<Tooltip />
<Area type="monotone" dataKey="value" stroke="#8884d8" fill="#8884d8" />
</AreaChart>
</ResponsiveContainer>
);
};
```
In the example above, we are representing the daily revenue of a restaurant business in an area chart. We are fetching the data in our dashboard component and passing it as a prop to the above component. Once again we are wrapping the area chart in a responsive container.
You need to export the above component by adding the changes below to the `src/pages/dashboard/charts/index.ts` file.
```ts
// pages/dashboard/charts/index.ts
export { LineChartComponent } from "./line-chart";
//highlight-next-line
export { AreaChartComponent } from "./area-chart";
```
We can now import and render the above component in the `<DashboardPage />` component. Add the changes below to the `src/pages/dashboard/list.tsx` file.
```tsx
...
import {
LineChartComponent,
//highlight-next-line
AreaChartComponent,
} from "./charts";
...
export const DashboardPage: React.FC = () => {
...
return (
<Grid
container
justifyContent="baseline"
alignItems={"stretch"}
spacing={2}
>
<Grid item xs={12} sm={6}>
<LineChartComponent dailyOrders={dailyOrders?.data ?? []} />
</Grid>
//highlight-start
<Grid item xs={12} sm={6}>
<AreaChartComponent dailyRevenue={dailyRevenue?.data ?? []} />
</Grid>
//highlight-end
</Grid>
);
};
```
Your dashboard should now have a simple area chart that looks like the image below.
<div className="centered-image">
<img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2024-02-23-recharts/area-chart.png" alt="Recharts chart" />
</div>
There are several types of Area charts. What we have created above is a simple Area chart. Recharts has built-in functionality for implementing most of them. For more, check out the documentation.
## Create a Bar chart using Recharts
Bar charts are among the most common charts for visualizing data. You can use it to visually represent categorical data. Recharts has the built-in `<BarChart />` component for creating bar charts.
Like the other types of charts, the data you want to represent on a bar chart should be an array of objects. You need to pass it to the `<BarChart />` component as the value of the `data` prop.
Let's add a bar chart to the dashboard in the refine project we created above. Create the `src/pages/dashboard/charts/bar-chart.tsx` file. Copy and paste the code below into it.
```tsx
// pages/dashboard/charts/bar-chart.tsx
import React from "react";
import {
BarChart,
Bar,
Rectangle,
XAxis,
YAxis,
Tooltip,
ResponsiveContainer,
} from "recharts";
import { IQueryResult } from "../../../interfaces";
export const BarChartComponent: React.FC<{ newCustomers: IQueryResult[] }> = ({
newCustomers,
}) => {
return (
<ResponsiveContainer width="100%" height="100%" aspect={500 / 300}>
<BarChart
width={500}
height={300}
data={newCustomers}
margin={{
top: 5,
right: 30,
left: 20,
bottom: 5,
}}
>
<XAxis dataKey="date" />
<YAxis />
<Tooltip />
<Bar
dataKey="value"
fill="#8884d8"
activeBar={<Rectangle fill="pink" stroke="blue" />}
/>
</BarChart>
</ResponsiveContainer>
);
};
```
We need to export the component above. Add the changes below to the `src/pages/dashboard/charts/index.ts` file.
```ts
export { LineChartComponent } from "./line-chart";
export { AreaChartComponent } from "./area-chart";
//highlight-next-line
export { BarChartComponent } from "./bar-chart";
```
We can now import and render the above component. Add the changes below to the `src/pages/dashboard/list.tsx` file.
```tsx
...
import {
LineChartComponent,
AreaChartComponent,
//highlight-next-line
BarChartComponent,
} from "./charts";
...
export const DashboardPage: React.FC = () => {
...
return (
<Grid
container
justifyContent="baseline"
alignItems={"stretch"}
spacing={2}
>
<Grid item xs={12} sm={6}>
<LineChartComponent dailyOrders={dailyOrders?.data ?? []} />
</Grid>
<Grid item xs={12} sm={6}>
<AreaChartComponent dailyRevenue={dailyRevenue?.data ?? []} />
</Grid>
//highlight-start
<Grid item xs={12} sm={6}>
<BarChartComponent newCustomers={newCustomers?.data ?? []} />
</Grid>
//highlight-end
</Grid>
);
};
```
After rendering the above component, your dashboard should now have a bar chart that looks like the image below.
<div className="centered-image">
<img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2024-02-23-recharts/bar-chart.png" alt="Recharts chart" />
</div>
## Create Scatter chart using Recharts
Scatter charts are useful to graphically represent the relationship between two variables. Like the other charts mentioned above, Recharts has the built-in `<ScatterChart />` component for creating scatter charts.
Let's create a simple scatter chart in this article. Create the `src/pages/dashboard/charts/scatter-chart.tsx` file. Copy and paste the code below into it.
```tsx
import React from "react";
import {
ScatterChart,
Scatter,
XAxis,
YAxis,
Tooltip,
ResponsiveContainer,
} from "recharts";
import { IQueryResult } from "../../../interfaces";
const formatData = (
dailyOrders: IQueryResult[],
newCustomers: IQueryResult[],
) => {
const formattedData = [];
for (let i = 0; i < dailyOrders.length; i++) {
if (!dailyOrders[i] || !newCustomers[i]) continue;
if (dailyOrders[i].date === newCustomers[i].date) {
formattedData.push({
date: dailyOrders[i].date,
dailyOrders: dailyOrders[i].value,
newCustomers: newCustomers[i].value,
});
}
}
return formattedData;
};
export const ScatterChartComponent: React.FC<{
dailyOrders: IQueryResult[];
newCustomers: IQueryResult[];
}> = ({ dailyOrders, newCustomers }) => {
const formattedData = formatData(dailyOrders, newCustomers);
return (
<ResponsiveContainer width="100%" height="100%" aspect={500 / 300}>
<ScatterChart
width={500}
height={300}
margin={{
top: 20,
right: 20,
bottom: 20,
left: 20,
}}
>
<XAxis type="number" dataKey="dailyOrders" name="Orders" />
<YAxis type="number" dataKey="newCustomers" name="Customers" />
<Tooltip cursor={{ strokeDasharray: "3 3" }} />
<Scatter name="A school" data={formattedData} fill="#8884d8" />
</ScatterChart>
</ResponsiveContainer>
);
};
```
In the example above, we wrapped the chart in a responsive container and passed the data to the `Scatter` component instead of the `ScatterChart`. Similar to the other charts we have already looked at, the data should be an array of objects.
In the example above, we had to transform the data because we wanted to determine the relationship between two variables(daily orders and new customers).
Let's export the above component. Add the changes below to the `src/pages/dashboard/charts/index.ts` file.
```ts
export { LineChartComponent } from "./line-chart";
export { AreaChartComponent } from "./area-chart";
export { BarChartComponent } from "./bar-chart";
//highlight-next-line
export { ScatterChartComponent } from "./scatter-chart";
```
You can now import and render the above component in the dashboard. Add the changes below to the `src/pages/dashboard/list.tsx` file.
```tsx
// src/pages/dashboard/list.tsx
...
import {
LineChartComponent,
AreaChartComponent,
BarChartComponent,
//highlight-next-line
ScatterChartComponent,
} from "./charts";
i...
export const DashboardPage: React.FC = () => {
...
return (
<Grid
container
justifyContent="baseline"
alignItems={"stretch"}
spacing={2}
>
<Grid item xs={12} sm={6}>
<LineChartComponent dailyOrders={dailyOrders?.data ?? []} />
</Grid>
<Grid item xs={12} sm={6}>
<AreaChartComponent dailyRevenue={dailyRevenue?.data ?? []} />
</Grid>
<Grid item xs={12} sm={6}>
<BarChartComponent newCustomers={newCustomers?.data ?? []} />
</Grid>
//highlight-start
<Grid item xs={12} sm={6}>
<ScatterChartComponent
dailyOrders={dailyOrders?.data ?? []}
newCustomers={newCustomers?.data ?? []}
/>
</Grid>
//highlight-end
</Grid>
);
};
```
After rendering the above component, the dashboard should now have a scatter chart that looks like the image below.
<div className="centered-image">
<img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2024-02-23-recharts/scatter-chart.png" alt="Recharts chart" />
</div>
## Create a Pie chart using Recharts
A pie chart is one of the most common and easy-to-understand charts. It is a circular graph that is split into multiple sectors. Each sector in a pie chart represents a particular category of data and its size is proportional to the quantity of the category it represents.
In this section, we will create a simple Pie chart using Recharts. Let's start by creating the `src/pages/dashboard/charts/pie-chart.tsx` file. Copy and paste the code below into it.
```tsx
import React from "react";
import { PieChart, Pie, ResponsiveContainer } from "recharts";
import { IQueryResult } from "../../../interfaces";
export const PieChartComponent: React.FC<{ dailyOrders: IQueryResult[] }> = ({
dailyOrders,
}) => {
return (
<ResponsiveContainer width="100%" height="100%" aspect={300 / 300}>
<PieChart width={300} height={300}>
<Pie
data={dailyOrders}
dataKey="value"
nameKey="date"
cx="50%"
cy="40%"
outerRadius={150}
fill="#82ca9d"
label
/>
</PieChart>
</ResponsiveContainer>
);
};
```
Let's export the above component so that we can import it anywhere in our application. Add the changes below to the `src/pages/dashboard/charts/index.ts` file.
```ts
export { LineChartComponent } from "./line-chart";
export { AreaChartComponent } from "./area-chart";
export { BarChartComponent } from "./bar-chart";
export { ScatterChartComponent } from "./scatter-chart";
//highligh-next-line
export { PieChartComponent } from "./pie-chart";
```
Let's import and render the above component in our dashboard. Add the changes below to the `src/pages/dashboard/list.tsx` file.
```tsx
...
import {
LineChartComponent,
AreaChartComponent,
BarChartComponent,
ScatterChartComponent,
//highlight-next-line
PieChartComponent,
} from "./charts";
...
return (
<Grid
container
justifyContent="baseline"
alignItems={"stretch"}
spacing={2}
>
<Grid item xs={12} sm={6}>
<LineChartComponent dailyOrders={dailyOrders?.data ?? []} />
</Grid>
<Grid item xs={12} sm={6}>
<AreaChartComponent dailyRevenue={dailyRevenue?.data ?? []} />
</Grid>
<Grid item xs={12} sm={6}>
<BarChartComponent newCustomers={newCustomers?.data ?? []} />
</Grid>
<Grid item xs={12} sm={6}>
<ScatterChartComponent
dailyOrders={dailyOrders?.data ?? []}
newCustomers={newCustomers?.data ?? []}
/>
</Grid>
//highlight-start
<Grid item xs={12} sm={6}>
<PieChartComponent dailyOrders={dailyOrders?.data ?? []} />
</Grid>
//highlight-end
</Grid>
);
};
```
Your dashboard should now have a Pie chart that looks like the image below.
<div className="centered-image">
<img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2024-02-23-recharts/pie-chart.png" alt="Recharts chart" />
</div>
## Create TreeMap using Recharts
A Treemap is a data visualization tool similar to a Pie chart. However, instead of using a circular graph and sectors to represent data, a Treemap instead uses rectangles and nested rectangles.
With a Treemap, a rectangle represents a category, and nested rectangles represent sub-categories within a category. Recharts has the built-in `<Treemap />` component for creating Treemaps. You can pass the data as the value of the data attribute.
Let's add a simple Treemap to our dashboard. Create the `src/pages/dashboard/charts/treemap.tsx` file. Copy and paste the code below into it.
```tsx
import React from "react";
import { Treemap, ResponsiveContainer } from "recharts";
const data = [
{
name: "axis",
children: [
{ name: "Axes", size: 1302 },
{ name: "Axis", size: 24593 },
{ name: "AxisGridLine", size: 652 },
{ name: "AxisLabel", size: 636 },
{ name: "CartesianAxes", size: 6703 },
],
},
{
name: "controls",
children: [
{ name: "AnchorControl", size: 2138 },
{ name: "ClickControl", size: 3824 },
{ name: "Control", size: 1353 },
{ name: "ControlList", size: 4665 },
{ name: "DragControl", size: 2649 },
{ name: "ExpandControl", size: 2832 },
{ name: "HoverControl", size: 4896 },
{ name: "IControl", size: 763 },
{ name: "PanZoomControl", size: 5222 },
{ name: "SelectionControl", size: 7862 },
{ name: "TooltipControl", size: 8435 },
],
},
{
name: "data",
children: [
{ name: "Data", size: 20544 },
{ name: "DataList", size: 19788 },
{ name: "DataSprite", size: 10349 },
{ name: "EdgeSprite", size: 3301 },
{ name: "NodeSprite", size: 19382 },
{
name: "render",
children: [
{ name: "ArrowType", size: 698 },
{ name: "EdgeRenderer", size: 5569 },
{ name: "IRenderer", size: 353 },
{ name: "ShapeRenderer", size: 2247 },
],
},
{ name: "ScaleBinding", size: 11275 },
{ name: "Tree", size: 7147 },
{ name: "TreeBuilder", size: 9930 },
],
},
{
name: "events",
children: [
{ name: "DataEvent", size: 7313 },
{ name: "SelectionEvent", size: 6880 },
{ name: "TooltipEvent", size: 3701 },
{ name: "VisualizationEvent", size: 2117 },
],
},
{
name: "legend",
children: [
{ name: "Legend", size: 20859 },
{ name: "LegendItem", size: 4614 },
{ name: "LegendRange", size: 10530 },
],
},
];
export const TreemapComponent: React.FC = () => {
return (
<ResponsiveContainer width="100%" height="100%" aspect={500 / 300}>
<Treemap
width={500}
height={300}
data={data}
dataKey="size"
aspectRatio={500 / 300}
stroke="#fff"
fill="#8884d8"
/>
</ResponsiveContainer>
);
};
```
In the example above, we have hard-coded the data because the API doesn't have a dataset we can use to create a Treemap. In a typical real-world project, you will retrieve the data from an API. You can export the above component from the `src/pages/dashboard/charts/index.ts` file like so:
```ts
export { LineChartComponent } from "./line-chart";
export { AreaChartComponent } from "./area-chart";
export { BarChartComponent } from "./bar-chart";
export { ScatterChartComponent } from "./scatter-chart";
export { PieChartComponent } from "./pie-chart";
//highlight-next-line
export { TreemapComponent } from "./treemap";
```
You can now import the above component and render it in the dashboard.
```tsx
import React from "react";
import { Grid } from "@mui/material";
import { useApiUrl, useCustom } from "@refinedev/core";
import dayjs from "dayjs";
const query = {
start: dayjs().subtract(7, "days").startOf("day"),
end: dayjs().startOf("day"),
};
import {
LineChartComponent,
AreaChartComponent,
BarChartComponent,
ScatterChartComponent,
PieChartComponent,
//highlight-next-line
TreemapComponent,
} from "./charts";
import { IQueryResult } from "../../interfaces";
export const formatDate = new Intl.DateTimeFormat("en-US", {
month: "short",
year: "numeric",
day: "numeric",
});
const transformData = (data: IQueryResult[]): IQueryResult[] => {
return data.map(({ date, value }) => ({
date: formatDate.format(new Date(date)),
value,
}));
};
export const DashboardPage: React.FC = () => {
const API_URL = useApiUrl("metrics");
const { data: dailyRevenue } = useCustom({
url: `${API_URL}/dailyRevenue`,
method: "get",
config: {
query,
},
queryOptions: {
select: ({ data }) => {
return { data: transformData(data.data) };
},
},
});
const { data: dailyOrders } = useCustom({
url: `${API_URL}/dailyOrders`,
method: "get",
config: {
query,
},
queryOptions: {
select: ({ data }) => {
return { data: transformData(data.data) };
},
},
});
const { data: newCustomers } = useCustom({
url: `${API_URL}/newCustomers`,
method: "get",
config: {
query,
},
queryOptions: {
select: ({ data }) => {
return { data: transformData(data.data) };
},
},
});
return (
<Grid
container
justifyContent="baseline"
alignItems={"stretch"}
spacing={2}
>
<Grid item xs={12} sm={6}>
<LineChartComponent dailyOrders={dailyOrders?.data ?? []} />
</Grid>
<Grid item xs={12} sm={6}>
<AreaChartComponent dailyRevenue={dailyRevenue?.data ?? []} />
</Grid>
<Grid item xs={12} sm={6}>
<BarChartComponent newCustomers={newCustomers?.data ?? []} />
</Grid>
<Grid item xs={12} sm={6}>
<ScatterChartComponent
dailyOrders={dailyOrders?.data ?? []}
newCustomers={newCustomers?.data ?? []}
/>
</Grid>
<Grid item xs={12} sm={6}>
<PieChartComponent dailyOrders={dailyOrders?.data ?? []} />
</Grid>
//highlight-start
<Grid item xs={12} sm={6}>
<TreemapComponent />
</Grid>
//highlight-end
</Grid>
);
};
```
Your dashboard should now have a Treemap that looks like the image below.
<div className="centered-image">
<img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2024-02-23-recharts/treemap.png" alt="Recharts chart" />
</div>
## Conclusion
Sometimes you may have to integrate data visualization in your React project. Charts make it easy to present data in an easy-to-understand and visually appealing way.
There are several frameworks for creating charts in React. Recharts is one of the most popular and feature-rich packages for creating charts in a React project or React-based frameworks such as refine.
Recharts support several types of charts out of the box. In this article, we have only explored a subset of charts you can create using Recharts. Check the documentation for details.
| necatiozmen |
1,867,435 | Is AI Really Intelligent? The Generative AI Paradox | Explore the Generative AI Paradox as discussed in Pablo Inigo Sanchez's article. This piece delves into whether AI models like GPT-4 truly understand what they create. | 0 | 2024-05-28T09:22:29 | https://dev.to/mkdev/is-ai-really-intelligent-the-generative-ai-paradox-1334 | ai, generative, llm | ---
title: Is AI Really Intelligent? The Generative AI Paradox
published: true
description: Explore the Generative AI Paradox as discussed in Pablo Inigo Sanchez's article. This piece delves into whether AI models like GPT-4 truly understand what they create.
tags: ai, generative, llm
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/h6hjvumo68qog4hxsefr.png
# Use a ratio of 100:42 for best results.
# published_at: 2024-05-28 09:19 +0000
---
Some time ago, a new paper appeared about, let's say, how intelligent the new LLM models like GPT-4 are. And when you read this document, you learn that AI is not so intelligent, or maybe it's not intelligent at all. Is that so?
This paper is called "THE GENERATIVE AI PARADOX: ‘What It Can Create, It May Not Understand’". [Here it is](https://arxiv.org/abs/2311.00059#:~:text=Specifically%2C%20we%20propose%20and%20test,those%20same%20types%20of%20outputs).
Let's dive into the Generative AI Paradox and understand how these researchers determined that humans are smarter than the GPT-4 model, for example.
To prepare this paper, the authors had a crucial question: Do these AI models truly understand what they create? This question forms the crux of the Generative AI Paradox.
To understand all this, let's first understand two concepts about two different tasks that a model can perform:
* **Generative tasks** are those that involve creating new content, like writing a story or designing an image. This is where AI models particularly excel. So, every time we talk about Generative tasks, we are talking about something that the AI is going to create for us.
* In **Discriminative tasks**, the model has to choose from predefined options or categorize data into existing groups. For example, in natural language processing, a generative task might be to write a story. In contrast, a discriminative task could be classifying a text as positive or negative, or selecting the correct answer from a set of options in a reading comprehension test.
The Generative AI paradox comes from an interesting observation: AI models are really good at creating detailed content similar to what experts do, but they often make basic mistakes in understanding that we wouldn't expect, even from people who are not experts. To explore this further, we use two types of evaluations: Selective Evaluation and Interrogative Evaluation.
**Selective Evaluation**: This evaluation assesses whether models can choose the correct answers from a set of options, testing their ability to understand and distinguish between different choices. It's a key part of seeing how practical and effective AI applications are.
Imagine an AI model is given a task to read a short story and then answer a multiple-choice question about it. The question might be: "What is the main theme of the story?" with four options provided: A) Friendship, B) Adventure, C) Love, and D) Betrayal. The AI's task is to read the story, understand its main theme, and select the correct option from the given choices.
**Interrogative Evaluation**: In this evaluation, we challenge models by asking them questions about the content they have created. This is a direct way to see if AI really understands its own creations. It helps us understand the depth of AI's comprehension and its ability to reflect on what it has generated.
For this, let's say the AI model generates a story about a young girl who overcomes her fears and wins a swimming competition. After generating this story, the AI is asked: "Why was the swimming competition important to the main character?" The AI must understand its own narrative to provide a coherent answer, such as "The competition was important to her because it was a way to overcome her fears and prove her strength." This tests the AI's ability to comprehend and explain the content it generated.
In this paper, a large number of experiments were conducted in both language and vision modalities to test these hypotheses with one question in mind: Does the AI truly understand its creations? These ranged from generating texts and creating images to answering questions about these creations.
After all those tests, they got a result in the two kinds of evaluations that we saw before:
In **Selective Evaluation**, models often outperformed humans in content generation but were less adept at discrimination and comprehension tasks.
In **Interrogative Evaluation**, models frequently failed to answer questions about their own creations, highlighting a disconnect between generation and comprehension.
So, the AI is not able to understand what it creates, and the reason for that is because it is trained to generate after training and not to understand what was generated. It's like a machine creating a toy one after the other, day by day. It can create something but not understand what that is.
These findings challenge our preconceived notions of AI. Although models can mimic human creativity, their understanding of content remains superficial.
This study is really important and helps start more research in the future. Being able to repeat this research and add more to it is key to understanding AI better.
The Generative AI Paradox gets us to think differently about how smart machines really are. Even though they can create a lot of things, AI still needs to learn a lot about truly understanding.
***
*Here' the same article in video form for your convenience:*
{% embed https://www.youtube.com/watch?v=ffyKi9LxonQ %}. | mkdev_me |
1,867,388 | Top 10 Benefits of Using a Beer Centrifuge in Your Brewery | In the dynamic world of brewing, maintaining high standards of quality and efficiency is crucial for... | 0 | 2024-05-28T09:14:54 | https://dev.to/zhong_xiaoge_13ee506563c1/top-10-benefits-of-using-a-beer-centrifuge-in-your-brewery-2jeb | In the dynamic world of brewing, maintaining high standards of quality and efficiency is crucial for success. One technological advancement that has significantly impacted the brewing industry is the beer centrifuge.
This equipment, which separates solid particles from liquid, offers numerous benefits that enhance the brewing process and the final product. Here are the top 10 benefits of using a beer centrifuge in your brewery.
## Improved Clarity and Quality
One of the most significant benefits of a beer [centrifuge](https://www.huading-separator.com/category/tubular-centrifuge/) is the dramatic improvement in the clarity and quality of the beer. The centrifuge effectively removes suspended solids, such as yeast and proteins, resulting in a much clearer product. This enhances the visual appeal and meets the consumer's expectation for a clear, high-quality beer.
## Enhanced Flavor Stability
By removing unwanted solids, a beer centrifuge helps in reducing the potential for off-flavors that can develop from yeast and protein degradation. This results in a more stable flavor profile, ensuring that your beer tastes as good at the point of consumption as it did when it left the brewery.
## Increased Yield
A centrifuge allows for higher recovery of beer from the fermentation vessel. Instead of losing a significant amount of product with the yeast and trub at the bottom of the tank, a centrifuge can recover this beer, increasing your overall yield. This efficiency translates directly into increased profitability.
## Faster Turnaround Times
Using a centrifuge significantly speeds up the clarification process. Traditional methods like settling or filtration can take days, whereas a centrifuge can achieve the same results in a matter of minutes. This faster turnaround means you can produce more beer in less time, improving your production capacity.
## Reduced Waste
By improving the efficiency of beer recovery and reducing the amount of product lost during clarification, a beer centrifuge helps minimize waste. This not only boosts your brewery's sustainability efforts but also enhances your bottom line by maximizing the use of raw materials.
## Consistent Quality
A centrifuge ensures a consistent removal of solids from batch to batch, leading to a more uniform product. Consistency is key in brewing, as it ensures that every pint of beer meets your quality standards, maintaining your brand’s reputation for excellence.
## Versatility
Beer centrifuges are versatile and can be used at different stages of the brewing process, from pre-filtration to post-fermentation. They can handle a variety of beer styles, from hazy IPAs to clear lagers, making them a valuable asset in any brewery.
## Improved Efficiency in Dry Hopping
For breweries that use dry hopping, a centrifuge can help separate hop particles from the beer more effectively. This not only improves the clarity of the beer but also ensures that the hop flavors and aromas are better integrated into the final product.
## Enhanced Safety and Hygiene
Modern beer centrifuges are designed with hygiene and safety in mind. They are easy to clean and sanitize, reducing the risk of contamination. Moreover, the automation of the separation process reduces the need for manual handling, enhancing safety for brewery staff.
## Cost Savings
While the initial investment in a [beer centrifuge](https://www.huading-separator.com/app/wine-spirits/) can be significant, the long-term cost savings are substantial. Increased yield, reduced waste, faster production times, and consistent quality all contribute to a better return on investment. Additionally, the ability to produce more beer with the same amount of raw materials lowers overall production costs.
## Conclusion
Centrifuging beer can improve beer clarity, flavor stability, increase yields and reduce turnaround time. By increasing consistency, reducing waste and ensuring the highest hygiene and safety standards, beer centrifuges are a valuable investment for any brewery aiming to optimize their production processes and product quality.
| zhong_xiaoge_13ee506563c1 | |
1,867,386 | Teach You to Use the FMZ Extended API to Batch Modify Parameters of the Bot | How can I change the parameters of live tradings in batch on FMZ? When the number of live tradings... | 0 | 2024-05-28T09:13:22 | https://dev.to/fmzquant/teach-you-to-use-the-fmz-extended-api-to-batch-modify-parameters-of-the-bot-50l3 | parameters, robot, fmzquant, api | How can I change the parameters of live tradings in batch on FMZ? When the number of live tradings exceeds dozens and reaches hundreds, it would be very inconvenient to configure live tradings one by one manually. At this time, we can use the FMZ extended API to complete these operations. So in this article, we will explore the group control of the bot, update some details of the parameters.
In the previous article, we solved the problem of how to use the FMZ extended API to monitor all the live tradings, group control live tradings, and send commands to the live tradings. And we still use the interface call code we encapsulated in the previous article as a basis, continue to write code to realize the batch modification of the parameters of the live trading.
Parameter settings:
Strategy code:
```
// Global variable
var isLogMsg = true // Controls whether logs are printed or not
var isDebug = false // Debugging mode
var arrIndexDesc = ["all", "running", "stop"]
var descRobotStatusCode = ["Idle", "Running", "Stopping", "Exited", "Stopped", "There is an error in the strategy"]
var dicRobotStatusCode = {
"all" : -1,
"running" : 1,
"stop" : 4,
}
// Extended logging functions
function LogControl(...args) {
if (isLogMsg) {
Log(...args)
}
}
// FMZ extended API call functions
function callFmzExtAPI(accessKey, secretKey, funcName, ...args) {
var params = {
"version" : "1.0",
"access_key" : accessKey,
"method" : funcName,
"args" : JSON.stringify(args),
"nonce" : Math.floor(new Date().getTime())
}
var data = `${params["version"]}|${params["method"]}|${params["args"]}|${params["nonce"]}|${secretKey}`
params["sign"] = Encode("md5", "string", "hex", data)
var arrPairs = []
for (var k in params) {
var pair = `${k}=${params[k]}`
arrPairs.push(pair)
}
var query = arrPairs.join("&")
var ret = null
try {
LogControl("url:", baseAPI + "/api/v1?" + query)
ret = JSON.parse(HttpQuery(baseAPI + "/api/v1?" + query))
if (isDebug) {
LogControl("Debug:", ret)
}
} catch(e) {
LogControl("e.name:", e.name, "e.stack:", e.stack, "e.message:", e.message)
}
Sleep(100) // Control frequency
return ret
}
// Get information about all running bots for the specified strategy Id.
function getAllRobotByIdAndStatus(accessKey, secretKey, strategyId, robotStatusCode, maxRetry) {
var retryCounter = 0
var length = 100
var offset = 0
var arr = []
if (typeof(maxRetry) == "undefined") {
maxRetry = 10
}
while (true) {
if (retryCounter > maxRetry) {
LogControl("Maximum number of retries exceeded", maxRetry)
return null
}
var ret = callFmzExtAPI(accessKey, secretKey, "GetRobotList", offset, length, robotStatusCode)
if (!ret || ret["code"] != 0) {
Sleep(1000)
retryCounter++
continue
}
var robots = ret["data"]["result"]["robots"]
for (var i in robots) {
if (robots[i].strategy_id != strategyId) {
continue
}
arr.push(robots[i])
}
if (robots.length < length) {
break
}
offset += length
}
return arr
}
```
### Get to Know the RestartRobot Function of the FMZ Extended API First
When we need to batch modify the parameters of the live trading and then run it, there are 2 cases for this scenario to begin with.
- 1. Bot has been created
For a live trading that has already been created, it is natural to restart it using the RestartRobot function, which is an extended API interface to FMZ.
- 2. Bot has not been created
For the live trading has not been created, there is no need to "modify" the parameters of the live trading, that's the batch creation of the live trading to run, and we use FMZ extended API interface - NewRobot function.
But no matter what kind of method, the next idea as well as the operation are similar, so we will use the RestartRobot extended API function as an example to explain.
RestartRobot function is used in two ways:
- 1. Configuration with only live trading ID passed in, not the parameters of live trading
This approach keeps the parameter configuration unchanged when the live trading stopped, and restarts the live trading only.
- 2. Configuration with live trading ID and the parameters of live trading passed in
This approach starts the live trading running with the new parameter configuration.
The first approach is not useful for our demand scenario, because our own demand is to modify a large number of parameters of the live trading in bulk. So the question is, the configuration of the parameters of the live trading is very complex, there are exchange object configuration, strategy parameter configuration, K-line period settings and so on.
Do not worry, let's explore them one by one.
### Get the Information of the Live Trading You Want to Operate
On FMZ, if you want to modify the parameter configuration of a live trading, then it must be non-running. Because only a live trading that is not running can have its parameter configuration modified. A live trading that is not in the running state may be in:
- The strategy stopped.
- Strategy has errors, stopped.
So we need to get the live tradings for the specified strategy first, and these live tradings are in a **stopped state** or **have an error to stop**.
```
function main() {
var stopRobotList = getAllRobotByIdAndStatus(accessKey, secretKey, strategyId, 4)
var errorRobotList = getAllRobotByIdAndStatus(accessKey, secretKey, strategyId, 5)
var robotList = stopRobotList.concat(errorRobotList)
}
```
This gives us all the information about the live trading that we need to change the configuration of, next we will get the detailed configuration of the live trading.
### Modification of Live Trading Configuration Parameters
For example, the live trading strategy for which we need to modify the parameters is as follows (i.e., the strategy whose strategy ID is the strategyId variable):
The strategy has 3 parameters as a test.
Modify the strategy parameters for the live trading, but maybe we don't want to modify the strategy's exchange configuration, but for the Extended API interface RestartRobot function, either no parameters are specified (as is just start the live trading) or all parameter configurations must be specified.
That is to say, before we use the RestartRobot function to start the live trading, we must use the extended API interface GetRobotDetail function to get the current configuration of the live trading first, and then we replace the part of the parameters that need to be modified, to re-construct the configuration parameters for the start of the live trading (i.e., the parameters that will be used to call RestartRobot), and then restart the live trading.
So, next we traverse robotList, and get the current parameter configuration one by one, the /**/ commented part of the following code is the live trading details, we need to deal with these data.
```
function main() {
var stopRobotList = getAllRobotByIdAndStatus(accessKey, secretKey, strategyId, 4)
var errorRobotList = getAllRobotByIdAndStatus(accessKey, secretKey, strategyId, 5)
var robotList = stopRobotList.concat(errorRobotList)
_.each(robotList, function(robotInfo) {
var robotDetail = callFmzExtAPI(accessKey, secretKey, "GetRobotDetail", robotInfo.id)
/*
{
"code": 0,
"data": {
"result": {
"robot": {
...
"id": 130350,
...
"name": "Test 1B",
"node_id": 3022561,
...
"robot_args": "[[\"pairs\",\"BTC_USDT,ETH_USDT,EOS_USDT,LTC_USDT\"],[\"col\",3],[\"htight\",300]]",
"start_time": "2023-11-19 21:16:12",
"status": 5,
"strategy_args": "[[\"pairs\",\"Currency list\",\"English comma spacing\",\"BTC_USDT,ETH_USDT,EOS_USDT,LTC_USDT\"],[\"col\",\"breadth\",\"Total width of the page is 12\",6],[\"htight\",\"height\",\"unit px\",600],[\"$$$__cmd__$$$coverSymbol\",\"close the position\",\"close out trading pairs\",\"\"]]",
"strategy_exchange_pairs": "[3600,[186193],[\"BTC_USD\"]]",
"strategy_id": 131242,
"strategy_last_modified": "2023-12-09 23:14:33",
"strategy_name": "Test 1",
...
}
},
"error": null
}
}
*/
// Parse the exchange configuration data
var exchangePairs = JSON.parse(robotDetail.data.result.robot.strategy_exchange_pairs)
// Get the exchange object index, trading pairs, these settings are not going to be changed
var arrExId = exchangePairs[1]
var arrSymbol = exchangePairs[2]
// Parse parameter configuration data
var params = JSON.parse(robotDetail.data.result.robot.robot_args)
// Update parameters
var dicParams = {
"pairs" : "AAA_BBB,CCC_DDD",
"col" : "999",
"htight" : "666"
}
var newParams = []
_.each(params, function(param) {
for (var k in dicParams) {
if (param[0] == k) {
newParams.push([k, dicParams[k]]) // Construct the strategy parameters and update the new parameter values
}
}
})
// Note that if there are spaces in the data you need to transcode it, otherwise the request will report an error
settings = {
"name": robotDetail.data.result.robot.name,
// Strategy parameter
"args": newParams,
// The strategy ID can be obtained by the GetStrategyList method.
"strategy": robotDetail.data.result.robot.strategy_id,
// K-period parameter, 60 means 60 seconds
"period": exchangePairs[0],
// Specifies which docker to run on; not writing this attribute means automatically assigning the run
"node" : robotDetail.data.result.robot.node_id,
"exchanges": []
}
for (var i = 0 ; i < arrExId.length ; i++) {
settings["exchanges"].push({"pid": arrExId[i], "pair": arrSymbol[i]})
}
Log(settings) // Test
var retRestart = callFmzExtAPI(accessKey, secretKey, "RestartRobot", robotInfo.id, settings)
Log("retRestart:", retRestart)
})
}
```
After running the batch parameter modification strategy, my live trading:
- Test 1A
- Test 1B
Batch modification of parameters was done with the configured exchange objects, trading pairs and K-line periods unchanged:
It was changed on the live trading page automatically:
And start running. Because we specified the modified parameters in the code above:
```
// Update parameters
var dicParams = {
"pairs" : "AAA_BBB,CCC_DDD",
"col" : "999",
"htight" : "666"
}
```
### END
For dozens, hundreds of live trading batch modify parameters, this method is more convenient. In the example, the parameters are modified to a uniform, of course you can customize your own modification rules in the code to specify different parameter configurations for each live trading. Or specify different exchange objects, trading pairs and so on.
For the FMZ platform, these requirements are flexible and customizable to achieve. Feel free to leave a comment if you have any requirement ideas, we can discuss, research and learn from each other , and find the solution to the problem.
From: https://blog.mathquant.com/2023/12/11/teach-you-to-use-the-fmz-extended-api-to-batch-modify-parameters-of-the-bot.html | fmzquant |
1,892,378 | Microservices Best Practices: Updating Device Connectivity Status with Java SDK | Overview As you might have read in the Microservice Best Practices: Getting Started... | 0 | 2024-06-18T12:22:55 | https://tech.forums.softwareag.com/t/microservices-best-practices-updating-device-connectivity-status-with-java-sdk/296235/1 | microservices, bestpractices, java, sdk | ---
title: Microservices Best Practices: Updating Device Connectivity Status with Java SDK
published: true
date: 2024-05-28 09:09:31 UTC
tags: Microservices, BestPractices, java, sdk
canonical_url: https://tech.forums.softwareag.com/t/microservices-best-practices-updating-device-connectivity-status-with-java-sdk/296235/1
---
## Overview
As you might have read in the [Microservice Best Practices: Getting Started](https://tech.forums.softwareag.com/t/microservice-best-practices-getting-started/295033) article already, Microservices can be used to implement multiple patterns. One of the most used patterns for Cumulocity IoT is the **server-side device agent** which retrieves/fetches data from devices, maps it to the Cumulocity IoT Domain model, and implements the REST Open API to transport the data to Cumulocity.
When updating the device connectivity status with a microservice this often leads to the case that the status is not updated as expected.
In this article, I will describe the problem in more detail and will provide a solution.
## Device Connectivity status in Cumulocity
One key feature of Cumulocity IoT is to track the connectivity status of your devices as part of the device management, also called [Connection Monitoring](https://cumulocity.com/docs/device-management-application/monitoring-and-controlling-devices/#connection-monitoring).
The connection of each device is tracked in two directions:
1. **Send connection** : Interval the device has to send data to the platform - so called upstream data. It is also related to the **Required interval** that can be defined to define when a device is considered as **offline**. For example, if the required interval is set to 60 minutes the device needs to send data upstream at least once within 60 minutes otherwise it will be considered as offline.
2. **Push connection** : The push connection is considered as **active** if you either have a long polling HTTPS connection on `/notification/operations` (old real-time API) or a MQTT client is connected and subscribed on `s/ds` topic. Otherwise, the connection will be considered as **inactive**. No data must be sent to update this status. It is sufficient to have an established connection.
Let me summarize the status from a device agent perspective:
To update the **Send connection** status the agent has to send any data within the required interval which is considered as a device request. What this means in detail I will explain in the next chapter.
To update the **Push connection** status the agent should have an active connection to Cumulocity and should make sure that it is reconnected when closed for any reason.
## Updating the device connectivity status within a microservice
If you implement a server-side agent using the Java Microservice SDK there are some assumptions made so that the connectivity status is not updated as expected. Let me explain why this is the case.
The microservice SDK implements the [Open API](https://cumulocity.com/api/core). As it was developed for multiple patterns (not only server-side agents) there was the assumption made that all requests should be counted as application calls and not device calls. This differentiation can be made by setting a specific header, the **X-Cumulocity-Application-Key** that contains the application name. Per default in the microservice SDK, this header is set which leads to the result that the device connectivity status is not updated when sending any data, which is on purpose.
Let me give you an example: Think about a scheduled aggregation microservice that calculates everyday aggregated metrics. If you didn’t have the header set, all these requests would be considered as device requests and each time the data is sent to Cumulocity they will be updating the connectivity status which confuses the user in the end.
So it really depends on your pattern and purpose of your microservice when to have this header set and when not.
## Remove the X-Cumulocity-Application-Key header from Microservice SDK requests
As explained, in the microservice SDK it is assumed that the header should always be set therefor it cannot be easily removed or set for every request implemented within the SDK. Now, if you still want to remove the header you have to change the context the microservice uses to call the REST API.
Using the microservice SDK you always have to be in a specific context which is normally defined when calling **MicroserviceSubscriptionsService** and the methods provided: `callForTenant`, `runForTenant`, `callForEachTenant`, `runForEachTenant`
In that tenant context, some basic information is provided like the tenant, credentials and also the **appKey** which is important for us. It can be autowired to your implementation like this and accessed if you are in any context:
```
@Autowired
private ContextService<MicroserviceCredentials> contextService;
```
To modify that appKey we can clone the existing context, remove the appKey and used the modified context to call any cumulocity endpoints which should be considered as device requests.
Here is an example method:
```
public MicroserviceCredentials removeAppKeyHeaderFromContext(MicroserviceCredentials context) {
final MicroserviceCredentials clonedContext = new MicroserviceCredentials(
context.getTenant(),
context.getUsername(), context.getPassword(),
context.getOAuthAccessToken(), context.getXsrfToken(),
context.getTfaToken(), null);
return clonedContext;
}
```
The important thing is to set the `appKey` to **null**.
In our original API calls we now just add this method `removeAppKeyHeaderFromContext`:
```
public MeasurementRepresentation createMeasurement(String name, String type, ManagedObjectRepresentation mor,
DateTime dateTime, HashMap<String, MeasurementValue> mvMap, String tenant) {
MeasurementRepresentation measurementRepresentation = subscriptionsService.callForTenant(tenant, () -> {
MicroserviceCredentials context = removeAppKeyHeaderFromContext(contextService.getContext());
return contextService.callWithinContext(context, () -> {
try {
MeasurementRepresentation mr = new MeasurementRepresentation();
mr.set(mvMap, name);
mr.setType(type);
mr.setSource(mor);
mr.setDateTime(dateTime);
log.debug("Tenant {} - Creating Measurement {}", tenant, mr);
return measurementApi.create(mr);
} catch (SDKException e) {
log.error("Tenant {} - Error creating Measurement", tenant, e);
return null;
}
});
});
return measurementRepresentation;
}
```
Now the newly created Measurement should be considered as a device request and the device connectivity send status should be updated as expected.
## Summary
In this article I demonstrated how requests from a microservice implemented with the Java SDK can be modified so that they are considered as device requests, thus, updating the device connectivity status in the device management.
This should be used with caution and only be used for requests that are actually device requests otherwise it will lead to confusion updating the connectivity status even for requests which are not originated by any device.
[Read full topic](https://tech.forums.softwareag.com/t/microservices-best-practices-updating-device-connectivity-status-with-java-sdk/296235/1) | techcomm_sag |
1,867,385 | Working with multi-queries in CodeIgniter | Running multi-queries (a bunch of text containing arbitrary DML/DDL statements) is highly unreliable... | 0 | 2024-05-28T09:06:55 | https://prahladyeri.github.io/blog/2024/05/working-with-multi-queries-in-ci3.html | php, webdev, sql | Running multi-queries (a bunch of text containing arbitrary DML/DDL statements) is highly unreliable and not an exact science in CodeIgniter or even PHP for that matter. The Internet is filled with posts like [this](https://stackoverflow.com/questions/8999959/executing-multiple-queries-in-codeigniter-that-cannot-be-executed-one-by-one), [this](https://stackoverflow.com/questions/51257526/how-to-run-multi-queries-at-once-in-codeigniter), and [this](https://stackoverflow.com/questions/21869603/running-multiple-queries-in-model-in-codeigniter) but you can't depend on these solutions in most situations due to the difference between how each database driver handles it.
Most of the `query()` or `exec()` statements often don't run at all due to the batch structure (begin and commit trans) not handled properly as per that driver's liking. It may also happen that due to one error in a single SQL statement, the whole text is ignored and yet, there is no error prompt, the folks will think that multi-query executed successfully when, in fact, it didn't. Hence, it is often so tempting to do something like this in CodeIgniter but doesn't always work (especially with SQLITE databases):
```php
$sql = file_get_contents(APPPATH . '/core/init.sql');
$this->db->query($sql);
```
The only approach that is guaranteed to work reliably here is to break your multi query into individual SQL chunks by splitting the semicolon and then run each individual statement like this:
```php
$sqls = explode(';', $sql);
array_pop($sqls);
foreach($sqls as $statement){
$statment = $statement . ";";
//echo $statement;
$this->db->query($statement);
}
```
This will naturally rule out adding of any comments or whitespaces above or below the statements as you would in a script because that might cause an error. However, a simple and clean SQL script such as this one will work flawlessly:
```sql
drop table if exists settings;
drop table if exists prices;
drop table if exists quantities;
create table settings (
id integer primary key,
key varchar(2000),
value varchar(2000)
);
create table update_status (
id integer primary key,
idx int,
last_update datetime
);
create table prices (
id integer primary key,
price decimal(9,2),
price_dt datetime
);
create table quantities (
id integer primary key,
idx integer,
qty decimal(9,2),
qty_dt datetime
);
``` | prahladyeri |
1,867,384 | IROAD X11 | Car dash camera in India | best dash camera | 2560x1440P resolution with 5. OM pixels deliver clearer and sharper images.SONY STARVIS sensor... | 0 | 2024-05-28T09:06:30 | https://dev.to/camstore_india_55250b14e2/iroad-x11-car-dash-camera-in-india-best-dash-camera-4m30 | 2560x1440P resolution with 5. OM pixels deliver clearer and sharper images.SONY STARVIS sensor applied to IROAD X11 Rear Camera.In parking mode, the surrounding brightness is automatically diagnosed within 5 seconds and the recording .Built-in Wi-Fi. A built-in G-sensor detects.
https://camstore.in/products/iroad-x11
| camstore_india_55250b14e2 | |
1,867,383 | Top 10 Divsly Email Marketing Tips for Small Businesses | Email marketing remains one of the most effective ways for small businesses to engage with customers... | 0 | 2024-05-28T09:06:03 | https://dev.to/divsly/top-10-divsly-email-marketing-tips-for-small-businesses-4dbc | emailmarketing, email, emailcampaigns | Email marketing remains one of the most effective ways for small businesses to engage with customers and drive sales. With Divsly's advanced features and user-friendly interface, small businesses can leverage powerful tools to create compelling email campaigns. Here are the top 10 Divsly [email marketing](https://divsly.com/features/email-marketing) tips to help you maximize your email marketing efforts and boost your business.
## 1. Build a Quality Email List
The foundation of any successful email marketing campaign is a high-quality email list. Focus on building a list of engaged subscribers who have opted in to receive your emails. Use sign-up forms on your website, social media, and at point-of-sale locations to capture email addresses. Offer incentives like discounts, free resources, or exclusive content to encourage sign-ups.
**Pro Tip:**
Use [Divsly](https://divsly.com/)'s customizable sign-up forms and landing pages to capture subscriber information seamlessly. Ensure your forms are mobile-friendly to capture leads from all devices.
## 2. Segment Your Audience
Segmentation allows you to tailor your email content to specific groups within your audience, resulting in more relevant and engaging messages. Divide your email list based on criteria such as demographics, purchase history, and engagement levels.
**Pro Tip:**
Divsly's segmentation tools enable you to create dynamic segments that automatically update based on subscriber behavior. Use these segments to send targeted campaigns that resonate with each group.
## 3. Personalize Your Emails
Personalization goes beyond addressing your subscribers by their first names. Leverage the data you have to create personalized content that speaks directly to their interests and needs. This can include product recommendations, special offers, and content based on their previous interactions with your brand.
**Pro Tip:**
Use Divsly's advanced personalization features to dynamically insert personalized content into your emails. This can significantly increase engagement and conversion rates.
## 4. Craft Compelling Subject Lines
Your subject line is the first thing subscribers see, and it plays a crucial role in whether they open your email. Craft subject lines that are concise, clear, and compelling. Use action words, create a sense of urgency, and tease the content of your email.
**Pro Tip:**
A/B test different subject lines using Divsly's testing tools to see which ones perform best. Analyze the results to refine your approach for future campaigns.
## 5. Optimize for Mobile
A significant portion of email opens occurs on mobile devices. Ensure your emails are mobile-friendly by using responsive design, which adjusts the layout of your email to fit the screen size of the device it’s viewed on.
**Pro Tip:**
Divsly's email templates are designed to be responsive, making it easy to create emails that look great on any device. Test your emails on various devices before sending them out to ensure optimal performance.
## 6. Use High-Quality Visuals
Visual content can significantly enhance the appeal of your emails. Use high-quality images, videos, and graphics to capture attention and convey your message effectively. Ensure that your visuals are relevant to the content and support your overall goal.
**Pro Tip:**
Divsly provides a library of stock images and design tools to help you create visually appealing emails. Use images that complement your brand and enhance your message.
## 7. Incorporate Clear CTAs
A clear and compelling call-to-action (CTA) is essential to drive conversions. Your CTA should be easy to find and should clearly communicate what you want the subscriber to do next. Use action-oriented language and create a sense of urgency.
**Pro Tip:**
Divsly's email editor allows you to easily add and customize CTA buttons. Test different CTA placements and designs to see which ones generate the highest click-through rates.
## 8. Automate Your Campaigns
Automation can save you time and ensure that your emails are sent at the right time to the right people. Set up automated campaigns for welcome emails, abandoned cart reminders, birthday greetings, and other triggered messages.
**Pro Tip:**
Use Divsly's automation workflows to create sophisticated email sequences that nurture leads and drive sales. Monitor the performance of your automated campaigns and make adjustments as needed.
## 9. Monitor and Analyze Performance
Regularly track the performance of your email campaigns to understand what works and what doesn’t. Key metrics to monitor include open rates, click-through rates, conversion rates, and unsubscribe rates.
**Pro Tip:**
Divsly's analytics dashboard provides detailed insights into your email performance. Use these insights to identify trends, optimize your campaigns, and achieve better results over time.
## 10. Stay Compliant with Email Regulations
Ensure that your email marketing practices comply with regulations such as the CAN-SPAM Act and GDPR. This includes obtaining explicit consent from subscribers, providing a clear opt-out option, and including your business's physical address in your emails.
**Pro Tip:**
Divsly helps you stay compliant with built-in features like double opt-in, easy unsubscribe options, and customizable compliance templates. Regularly review and update your practices to ensure continued compliance.
## Conclusion
Divsly offers a robust platform for small businesses to create and manage effective email marketing campaigns. By following these ten tips, you can enhance your email marketing efforts, build stronger relationships with your customers, and drive growth for your business. Remember to continually test, analyze, and refine your strategies to stay ahead of the competition and meet your marketing goals. Happy emailing! | divsly |
1,867,376 | The Ultimate Solution for Effortless Form Validation | In the constantly evolving landscape of web development, form validation remains a crucial aspect for... | 0 | 2024-05-28T09:03:18 | https://dev.to/natucode/the-ultimate-solution-for-effortless-form-validation-1b62 | javascript, angular, react | In the constantly evolving landscape of web development, form validation remains a crucial aspect for enhancing user experience and ensuring data integrity. Trivule stands out as a robust and user-friendly JavaScript library designed to simplify and streamline the form validation process. Having tested it, I believe that with community support, Trivule will become a valuable tool for managing web validation.
Whether you are an experienced developer or a novice, Trivule offers a mix of declarative and imperative validation methods to meet your specific needs.
#### Why Use Trivule?
Trivule stands out for several compelling reasons:
1. **Real-Time Validation**: Trivule offers real-time validation, providing immediate feedback as users fill out forms. It also allows for this feature to be disabled if needed.
2. **Flexibility and Ease of Use**: Whether you prefer to define validation rules directly in HTML or through JavaScript, Trivule accommodates both approaches. This duality offers flexibility and simplifies the development process.
3. **Comprehensive Error Handling**: Trivule supports customizable and localized error messages, allowing developers to provide clear and context-specific feedback in multiple languages.
4. **Event-Based Validation**: Trivule can trigger validation on a variety of events, including `blur`, `input`, and custom events, offering granular control over when and how validation occurs.
5. **Integration with Modern Frameworks**: Trivule seamlessly integrates with popular frameworks, making it a versatile tool for any project.
#### Advantages of Trivule
- **Declarative and Imperative Validation**: Trivule supports both declarative and imperative validation methods, catering to different development styles and requirements.
- **Ease of Integration**: With its straightforward syntax and comprehensive documentation, Trivule is easy to integrate into new or existing projects.
- **Customizable Messages**: Error messages can be customized and localized, enhancing the user experience by providing relevant feedback.
- **Extensive Rule Set**: Trivule offers a wide array of predefined validation rules, from simple required fields to complex date and file validations.
#### Disadvantages of Trivule
- **Learning Curve**: Although Trivule is designed to be user-friendly, developers unfamiliar with form validation libraries may face an initial learning curve.
- **Dependency on JavaScript**: Projects aiming to minimize JavaScript usage might find Trivule's extensive use of JS a drawback.
- **Limited Community Support**: As a newer library, Trivule might not yet have the extensive community support and resources available for more established libraries.
### Code Examples
#### Declarative Validation Example
Using Trivule's declarative approach, you can define validation rules directly in the HTML:
```html
<form id="myForm">
<input type="text" data-tr-rules="required|int|min:18" name="age" placeholder="Enter your age" />
<div data-tr-feedback="age"></div>
<button type="submit">Submit</button>
</form>
<script>
new TrivuleForm('#myForm');
</script>
```
In this example, the age input field is required, must be an integer, and must be at least 18. The `data-tr-feedback` attribute is used to display validation messages.
#### Imperative Validation Example
For more dynamic validation, you can define rules using JavaScript:
```javascript
const trivuleForm = new TrivuleForm('#myForm');
trivuleForm.make({
age: {
rules: ['required', 'integer', 'min:18'],
feedbackElement: '[data-tr-feedback="age"]',
},
email: {
rules: ['required', 'email'],
feedbackElement: '[data-tr-feedback="email"]',
}
});
trivuleForm.onFails((form) => {
console.log("Form validation failed!", form);
});
trivuleForm.onPasses((form) => {
console.log("Form validation passed!", form);
});
```
In this example, the form has validation rules defined for both the age and email fields. The `onFails` and `onPasses` methods provide callbacks for handling validation results.
### Conclusion
In summary, Trivule provides a flexible and powerful solution for form validation, addressing both simple and complex scenarios. Its real-time validation, ease of integration, and extensive rule set make it a valuable tool for developers aiming to enhance user experience and ensure data integrity. While it may present a learning curve for some, its advantages often outweigh these drawbacks, positioning Trivule as a strong contender in the field of form validation.
### Resources
- [CSS Script](https://www.cssscript.com/form-validation-trivule/)
- [GitHub](https://github.com/trivule/trivule)
- [Docs](https://www.trivule.com)
| natucode |
1,867,381 | Rockdale tx sand gravel | When it comes to construction and landscaping projects, the quality of materials used can... | 0 | 2024-05-28T09:02:07 | https://dev.to/rockdale06/rockdale-tx-sand-gravel-af2 | When it comes to construction and landscaping projects, the quality of materials used can significantly influence the outcome. Rockdale Sand & Gravel, a leading sand and gravel supplier, stands out as a trusted partner for contractors, builders, and homeowners. With a commitment to excellence and a comprehensive range of products, Rockdale Sand & Gravel ensures that every project is built on a solid foundation. This article explores the company's offerings, services, and the benefits of choosing Rockdale Sand & Gravel for your next project.
A Legacy of Quality and Reliability
History and Expertise
Rockdale Sand & Gravel has a long-standing reputation for providing high-quality materials and exceptional customer service. Established several decades ago, the company has grown from a small local supplier to a major player in the construction materials industry. Their extensive experience and deep understanding of the industry allow them to meet the diverse needs of their clients efficiently.
**_[Rockdale tx sand gravel](https://rockdalesandgravel.com/)_**
Commitment to Quality
Quality is at the core of Rockdale Sand & Gravel's operations. They source their materials from the best quarries and ensure that each batch meets stringent quality standards. This commitment to excellence ensures that clients receive top-tier sand and gravel that enhance the durability and aesthetics of their projects.
Comprehensive Range of Products
Sand Products
Rockdale Sand & Gravel offers a variety of sand products suitable for different applications. Their range includes:
Construction Sand: Ideal for concrete production, masonry work, and as a base material for paving.
Play Sand: Safe and clean, perfect for playgrounds, sandboxes, and recreational areas.
Masonry Sand: Fine-textured sand used for mixing with cement to create mortar for brick and block work.
Gravel Products
Their gravel offerings are equally diverse, catering to a wide range of construction and landscaping needs:
Crushed Stone: Available in various sizes, crushed stone is used for road base, concrete aggregate, and drainage projects.
Pea Gravel: Small, smooth stones that are ideal for landscaping, driveways, and pathways.
River Rock: Natural, rounded stones that add an aesthetic touch to gardens, water features, and landscaping designs.
Specialized Services
Delivery Services
Rockdale Sand & Gravel provides efficient delivery services to ensure that materials reach the job site promptly and in perfect condition. Their fleet of trucks is equipped to handle deliveries of all sizes, from small residential projects to large commercial constructions.
Custom Blending
Understanding that each project has unique requirements, Rockdale Sand & Gravel offers custom blending services. They can mix different types of sand and gravel to create a product that perfectly suits your project's specifications.
Consultation and Support
Their team of experts is always available to provide consultation and support. Whether you need advice on the right materials for your project or assistance with calculating the required quantities, Rockdale Sand & Gravel's knowledgeable staff is ready to help.
Benefits of Choosing Rockdale Sand & Gravel
High-Quality Materials
Using high-quality materials is crucial for the success of any construction or landscaping project. Rockdale Sand & Gravel ensures that their products are of the highest quality, sourced from reputable quarries, and thoroughly inspected before delivery.
Cost-Effective Solutions
Rockdale Sand & Gravel offers competitive pricing, making it an affordable option for all types of projects. Their cost-effective solutions help clients stay within budget without compromising on quality.
Sustainable Practices
The company is committed to sustainable practices and environmental stewardship. They implement eco-friendly mining and processing techniques to minimize their environmental footprint. Additionally, they offer recycled materials as part of their product range, contributing to sustainable construction practices.
Reliable and Timely Delivery
Timeliness is critical in construction and landscaping projects. Rockdale Sand & Gravel's reliable delivery services ensure that materials arrive on schedule, helping clients avoid delays and keep their projects on track.
Customer Satisfaction
Customer satisfaction is a top priority at Rockdale Sand & Gravel. Their dedication to providing exceptional service and high-quality products has earned them a loyal customer base and positive reviews. They strive to exceed customer expectations on every project, large or small.
Case Studies and Success Stories
Residential Landscaping
A local homeowner transformed their backyard into a stunning outdoor oasis using materials from Rockdale Sand & Gravel. The project included a new patio, pathways, and a decorative water feature. The high-quality sand and pea gravel provided a stable foundation and added aesthetic appeal, resulting in a beautiful and functional space.
Commercial Construction
A large commercial development in the region relied on Rockdale Sand & Gravel for their extensive foundation and road construction needs. The project's success was attributed to the timely delivery of crushed stone and construction sand, which ensured that the project stayed on schedule and within budget.
Conclusion
Rockdale Sand & Gravel stands out as a premier supplier of sand and gravel, offering a wide range of high-quality materials and exceptional services. Whether you're undertaking a small residential project or a large commercial construction, Rockdale Sand & Gravel has the products and expertise to meet your needs. Their commitment to quality, customer satisfaction, and sustainable practices makes them the go-to choice for all your sand and gravel requirements. Partner with Rockdale Sand & Gravel and build your next project on a foundation of excellence. | rockdale06 | |
1,867,380 | 💥Game-Changers: How Blockchain is Revolutionizing the Sports Industry | 🌟 Blockchain Revolutionizes Sports Industry Blockchain technology is opening up new opportunities for... | 0 | 2024-05-28T09:01:12 | https://dev.to/irmakork/game-changers-how-blockchain-is-revolutionizing-the-sports-industry-7cf | 🌟 Blockchain Revolutionizes Sports Industry
Blockchain technology is opening up new opportunities for fans, clubs, and organizations in the sports industry. Here’s how:
⚽ FC Manchester City
Since 2021, Manchester City has integrated blockchain through partnerships with companies like Superbloke, creating the online game FC Superstars for digital teams and card exchanges based on real matches. The club also issued $CITY fan tokens on the Chiliz blockchain with Socios.com, allowing fans to participate in club decisions and access exclusive experiences. Additionally, a partnership with OKX led to a $70 million sponsorship deal and the release of limited-edition NFT jerseys. Nuria Tarre, the club’s marketing officer, highlighted blockchain's role in enhancing fan interaction and ownership experiences.
🏀 NBA
The NBA was an early adopter of blockchain. The Sacramento Kings launched a blockchain-based awards program with Blockparty and an auction platform for memorabilia with ConsenSys and Treum. In 2021, the league introduced NBA Top Shot, a platform for buying, collecting, and trading licensed digital collectibles called "Moments."
🏟️ FC Barcelona
FC Barcelona uses blockchain to engage fans through $BAR Fan Tokens in collaboration with Chiliz, providing access to exclusive content and participation in surveys. Barça Studios, the club’s digital division, leads in developing NFTs and other Web3 technologies. The club partnered with WhiteBIT to create an online course on blockchain technology, in cooperation with the Barça Innovation Hub (BIHUB).
🔗 Summary
Blockchain integration in sports transforms fan interactions, increases transparency, and creates new revenue streams. Partnerships and innovative initiatives show how blockchain facilitates interactive experiences, fan participation in decisions, and access to exclusive content and rewards. By embracing blockchain and Web3 technologies, sports organizations are catering to a tech-savvy audience and leading industry innovation.
| irmakork | |
1,867,315 | Essential Performance Metrics to Monitor in Liferay | When it comes to maintaining a high-performing Liferay portal, understanding and monitoring the right... | 0 | 2024-05-28T09:00:27 | https://dev.to/aixtortechnologies/essential-performance-metrics-to-monitor-in-liferay-302o | liferayperformancetuning, performancetuning, liferay, liferaydxp | When it comes to maintaining a high-performing Liferay portal, understanding and monitoring the right performance metrics is crucial. At Aixtor, a proud Liferay Silver Partner, we specialize in optimizing [Liferay performance tuning](https://aixtor.com/blog/liferay-performance-tuning/) to ensure your portal operates at its best. This blog post will guide you through the essential performance metrics you need to monitor for optimal Liferay performance, leveraging our extensive expertise in the field.
#### Introduction to Liferay Performance Tuning
Liferay is a powerful and flexible platform used by organizations worldwide to build robust web portals. However, to ensure your Liferay portal operates at its best, continuous performance tuning is essential. This involves regular monitoring, analyzing data, and making necessary adjustments based on performance metrics.
Effective Liferay performance tuning can help you avoid slow load times, handle higher traffic volumes, and ensure a seamless user experience. But what metrics should you focus on? Let’s explore the key performance indicators (KPIs) that will guide your tuning efforts.
#### Key Performance Metrics for Liferay Performance Tuning
**1. Response Time**
Response time is one of the most critical metrics to monitor. It measures the time taken for your server to respond to a user’s request. High response times can lead to user frustration and decreased satisfaction. Monitoring this metric helps identify slow components and optimize them for faster performance.
**2. Throughput**
Throughput refers to the number of requests your server can handle per second. Higher throughput means your Liferay portal can manage more concurrent users without performance degradation. Keeping an eye on throughput helps you understand the capacity of your portal and plan for scaling as needed.
**3. CPU Usage**
Monitoring CPU usage is essential to ensure your server is not overwhelmed. High CPU usage can indicate inefficient code or processes that need optimization. By keeping CPU usage within acceptable limits, you can maintain a stable and responsive portal.
**4. Memory Usage**
Memory usage is another critical metric. It’s important to monitor both the total memory used and the rate of memory growth. Memory leaks or excessive memory consumption can lead to crashes and downtime. Regular monitoring helps you detect and address these issues before they impact users.
**5. Database Performance**
Liferay portals rely heavily on database interactions. Monitoring database performance involves tracking query response times, the number of active connections, and transaction rates. Slow database performance can be a major bottleneck, so optimizing your database queries and ensuring efficient indexing is crucial.
**6. Error Rates**
Tracking error rates helps you identify and resolve issues quickly. High error rates can indicate underlying problems in your code or infrastructure. By addressing these errors promptly, you can improve the reliability and performance of your Liferay portal.
**7. Cache Hit Ratio**
Caching is a vital component of performance optimization. The cache hit ratio measures the effectiveness of your caching strategy by comparing the number of cache hits to total requests. A higher cache hit ratio means more requests are served from the cache, reducing load on your server and improving response times.
**8. Network Latency**
Network latency measures the time taken for data to travel between the client and server. High latency can significantly impact user experience, especially for geographically distributed users. Monitoring and optimizing network latency ensures faster data transfer and a smoother user experience.
**9. Disk I/O**
Disk I/O performance can affect how quickly your server can read and write data. High disk I/O usage may indicate a need for faster storage solutions or optimization of data access patterns. Ensuring efficient disk I/O is essential for maintaining overall portal performance.
**10. Session Duration**
Session duration metrics provide insights into user engagement and interaction with your portal. By monitoring how long users stay active on your site, you can identify potential issues that might be causing users to leave early and make necessary improvements.
#### Practical Steps for Effective Liferay Performance Tuning
Now that we’ve identified the key metrics to monitor, let’s look at some practical steps you can take for effective Liferay performance tuning:
**1. Regular Monitoring and Reporting**
Implement regular monitoring using tools like Liferay’s built-in monitoring capabilities, JMX, or third-party solutions such as New Relic and AppDynamics. Set up automated reports to keep track of performance trends and identify issues promptly.
**2. Optimize Code and Queries**
Review your code and database queries for efficiency. Optimize algorithms, remove redundant operations, and ensure your database queries are properly indexed. Regular code reviews and performance testing can help maintain optimal performance.
**3. Leverage Caching**
Use Liferay’s caching mechanisms to reduce load on your server. Configure and tune cache settings based on your usage patterns to achieve a high cache hit ratio. Implement distributed caching solutions if necessary to handle high traffic volumes.
**4. Scale Resources Appropriately**
Ensure your server resources (CPU, memory, storage) are scaled appropriately to handle your traffic. Consider using cloud-based solutions that allow for dynamic scaling based on demand.
**5. Perform Load Testing**
Conduct regular load testing to simulate different traffic conditions. Tools like Apache JMeter or Gatling can help you understand how your portal performs under various loads and identify potential bottlenecks.
**6. Optimize Network Configurations**
Review and optimize your network configurations to reduce latency. Use Content Delivery Networks (CDNs) to distribute content closer to your users and implement load balancers to distribute traffic evenly across servers.
**7. Implement a Content Delivery Strategy**
For portals with rich media content, implementing a content delivery strategy is essential. Use CDNs to deliver static content efficiently and consider using adaptive streaming for video content to optimize bandwidth usage.
**8. Conduct Regular Audits**
Perform regular performance audits to identify areas for improvement. These audits should include a review of server configurations, database performance, caching strategies, and network setups.
#### Practical Steps for Effective Liferay Performance Tuning
As a Liferay Silver Partner, Aixtor has extensive experience in optimizing Liferay portals. Our team of experts specializes in performance tuning, ensuring that your portal is not only fast and reliable but also scalable to meet your growing needs.
At Aixtor, we take a comprehensive approach to Liferay performance tuning by focusing on the key metrics mentioned above. Our proven strategies and best practices help identify bottlenecks, streamline processes, and enhance overall portal performance. Here’s how we can help:
**1. Tailored Performance Audits**
We conduct in-depth performance audits tailored to your specific portal setup. Our audits include a thorough review of server configurations, code efficiency, database performance, and more.
**2. Custom Optimization Solutions**
Based on our audit findings, we develop custom optimization solutions that address your unique challenges. Our team ensures that every aspect of your portal is fine-tuned for peak performance.
**3. Ongoing Monitoring and Support**
Performance tuning is an ongoing process. We provide continuous monitoring and support to keep your portal running smoothly. Our proactive approach helps prevent issues before they impact your users.
**4. Training and Knowledge Sharing**
We believe in empowering our clients with the knowledge they need to maintain optimal performance. Our experts provide training and best practices to your team, ensuring long-term success.
#### Conclusion
Effective Liferay performance tuning requires a comprehensive approach to monitoring and optimizing key performance metrics. By focusing on response time, throughput, CPU and memory usage, database performance, error rates, cache hit ratio, network latency, disk I/O, and session duration, you can ensure your Liferay portal runs smoothly and efficiently.
At Aixtor, we specialize in helping organizations achieve optimal Liferay performance. With our tailored performance audits, custom optimization solutions, ongoing monitoring, and expert training, we ensure your portal delivers a seamless and satisfying user experience. Contact Aixtor today to learn how we can help you unlock the full potential of your Liferay portal. | aixtortechnologies |
1,864,670 | Building a Personal Portfolio Site with HTML, CSS, and JavaScript | Creating a personal portfolio website is a great way to showcase your skills, projects, and... | 0 | 2024-05-28T09:00:00 | https://dev.to/nitin-rachabathuni/building-a-personal-portfolio-site-with-html-css-and-javascript-3368 | Creating a personal portfolio website is a great way to showcase your skills, projects, and experience to potential employers or clients. In this article, we'll go through the steps to build a simple yet effective portfolio site using HTML, CSS, and JavaScript. By the end of this guide, you'll have a solid foundation to expand upon and personalize your own portfolio.
Why a Personal Portfolio?
A personal portfolio website serves as your digital business card. It provides a platform to:
Showcase Your Work: Highlight projects, skills, and achievements.
Establish an Online Presence: Create a professional online profile.
Attract Opportunities: Engage potential employers or clients.
Let's dive into the creation process!
Step 1: Structure with HTML
Start by creating the basic structure of your portfolio site using HTML. Here’s a simple example to get you started:
```
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Portfolio</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<header>
<h1>My Portfolio</h1>
<nav>
<ul>
<li><a href="#about">About</a></li>
<li><a href="#projects">Projects</a></li>
<li><a href="#contact">Contact</a></li>
</ul>
</nav>
</header>
<section id="about">
<h2>About Me</h2>
<p>Hello! I’m a web developer with a passion for creating dynamic and responsive websites.</p>
</section>
<section id="projects">
<h2>Projects</h2>
<div class="project">
<h3>Project Title</h3>
<p>Project description goes here.</p>
</div>
</section>
<section id="contact">
<h2>Contact</h2>
<p>Email: <a href="mailto:youremail@example.com">youremail@example.com</a></p>
</section>
<footer>
<p>© 2024 Your Name</p>
</footer>
<script src="scripts.js"></script>
</body>
</html>
```
Step 2: Styling with CSS
Next, we add some basic styling with CSS to make the site visually appealing:
```
/* styles.css */
body {
font-family: Arial, sans-serif;
line-height: 1.6;
margin: 0;
padding: 0;
}
header {
background: #333;
color: #fff;
padding: 1rem 0;
text-align: center;
}
nav ul {
list-style: none;
padding: 0;
}
nav ul li {
display: inline;
margin: 0 10px;
}
nav ul li a {
color: #fff;
text-decoration: none;
}
section {
padding: 20px;
margin: 20px;
}
.project {
background: #f4f4f4;
padding: 10px;
margin-bottom: 10px;
}
footer {
text-align: center;
padding: 10px 0;
background: #333;
color: #fff;
}
```
Step 3: Adding Interactivity with JavaScript
Finally, we enhance the site’s functionality with some JavaScript. Let’s add a simple script to dynamically update the content:
// scripts.js
document.addEventListener('DOMContentLoaded', () => {
const projects = [
{
title: 'Project One',
description: 'Description for project one.'
},
{
title: 'Project Two',
description: 'Description for project two.'
}
];
const projectSection = document.getElementById('projects');
projects.forEach(project => {
const projectDiv = document.createElement('div');
projectDiv.classList.add('project');
const projectTitle = document.createElement('h3');
projectTitle.textContent = project.title;
projectDiv.appendChild(projectTitle);
const projectDescription = document.createElement('p');
projectDescription.textContent = project.description;
projectDiv.appendChild(projectDescription);
projectSection.appendChild(projectDiv);
});
Bringing It All Together
Now you have a basic portfolio site with a structure defined in HTML, styled with CSS, and some dynamic content added using JavaScript. This foundation can be expanded with more sections, interactive elements, and personalized styling to better reflect your unique brand.
Tips for Personalization:
Customize the Design: Experiment with different layouts, color schemes, and fonts.
Add More Sections: Include a blog, testimonials, or a gallery.
Enhance Interactivity: Use JavaScript to create animations, sliders, or interactive forms.
Optimize for Performance: Ensure your site is fast and responsive on all devices.
Creating a personal portfolio website is a rewarding project that can significantly impact your professional presence online. Happy coding!
Conclusion
A well-crafted personal portfolio site can set you apart in the digital age. By using HTML, CSS, and JavaScript, you have the tools to create a professional and attractive online showcase for your work. Start building today, and let your portfolio reflect the best of your skills and achievements.
---
Thank you for reading my article! For more updates and useful information, feel free to connect with me on LinkedIn and follow me on Twitter. I look forward to engaging with more like-minded professionals and sharing valuable insights.
| nitin-rachabathuni | |
1,863,644 | Customize the Turbo Progress Bar | This article was originally published on Rails Designer For Turbo-powered request that take... | 0 | 2024-05-28T09:00:00 | https://railsdesigner.com/turbo-progress-bar/ | rails, ruby, webdev, hotwire | This article was originally published on [Rails Designer](https://railsdesigner.com/turbo-progress-bar/)
---
For Turbo-powered request that take longer than 500ms, Turbo will automatically display a progress bar.
It simply is a `<div>` element with a class name of `turbo-progress-bar`. You can explore how this element functions and see it's default styles [here](https://github.com/hotwired/turbo/blob/9fb05e3ed3ebb15fe7b13f52941f25df425e3d15/src/core/drive/progress_bar.js).
For references these are [the default styles](https://github.com/hotwired/turbo/blob/9fb05e3ed3ebb15fe7b13f52941f25df425e3d15/src/core/drive/progress_bar.js#L8):
```js
.turbo-progress-bar {
position: fixed;
display: block;
top: 0;
left: 0;
height: 3px;
background: #0076ff; /* Cyan blue 🎨 */
z-index: 2147483647; /* The maximum positive value for a 32-bit signed binary integer 🤓 */
transition:
width ${ProgressBar.animationDuration}ms ease-out,
opacity ${ProgressBar.animationDuration / 2}ms ${ProgressBar.animationDuration / 2}ms ease-in;
transform: translate3d(0, 0, 0);
}
```
These styles are applied first in the document, which means you can easily override them with your own CSS.
I like to use even this minute element to elevate my brand's awareness. It doesn't need to be much, it can simply be a change of the background color. Let's give some example for inspiration.
These examples use Tailwind CSS' `@apply`.
## Change the background color
```css
@layer components {
.turbo-progress-bar {
@apply bg-blue-500;
}
}
```
## Rounded corners on the right
```css
@layer components {
.turbo-progress-bar {
@bg-blue-500 rounded-r-full;
}
}
```
## Glowing blue
```css
@layer components {
.turbo-progress-bar {
@apply bg-blue-500 shadow shadow-[0_0_10px_rgba(59,130,246,0.72)];
}
}
```
## Fade In
```css
@layer components {
.turbo-progress-bar {
@apply bg-gradient-to-r from-transparent to-sky-500;
}
}
```
## Float off the sides
It's a bit hard to see in this example—so add it to your app!
```css
@layer components {
.turbo-progress-bar {
@apply bg-black rounded-full top-4 left-4 right-4 ring-2 ring-offset-0 ring-white;
}
}
```
## Colorful gradient
```css
@layer components {
.turbo-progress-bar {
@apply bg-gradient-to-r from-indigo-500 via-purple-400 to-pink-500;
}
}
```
## More tips
Don't want to show the progress bar at all? Just hide it!
```css
.turbo-progress-bar {
visibility: hidden;
}
```
Want to change _when_ the progress bar appears (other than after the default 500ms)?
```js
Turbo.setProgressBarDelay(delayInMilliseconds)
```
It's easy to overlook these UI components when building your app, but with the examples given above, it's now really trivial to tweak them to match your brand. | railsdesigner |
1,867,379 | Sand & gravel supplier | In the world of construction and landscaping, the quality of raw materials can make or break a... | 0 | 2024-05-28T08:59:10 | https://dev.to/rockdale06/sand-gravel-supplier-14j9 | In the world of construction and landscaping, the quality of raw materials can make or break a project. Sand and gravel are essential components in a wide range of projects, from building foundations to garden landscaping. Rockdale Sand & Gravel stands out as a trusted supplier, providing high-quality sand and gravel products to meet diverse project needs. This article explores the importance of sand and gravel, the offerings of Rockdale Sand & Gravel, and why choosing a reliable supplier is crucial for successful projects.
The Importance of Sand and Gravel
Sand and gravel are fundamental materials in construction and landscaping. Their applications are vast, including:
Construction: Sand and gravel are integral to concrete production. They provide the necessary strength and stability to concrete mixes, making them essential for building foundations, roads, and bridges.
**_[Sand & gravel supplier](https://rockdalesandgravel.com/)_**
Landscaping: These materials are used in creating pathways, garden beds, and decorative elements. Gravel, in particular, is prized for its aesthetic appeal and durability in outdoor spaces.
Drainage Systems: Proper drainage is crucial in construction and landscaping. Gravel is often used in drainage systems to prevent water accumulation and soil erosion.
Erosion Control: In areas prone to erosion, sand and gravel are used to stabilize the soil and prevent further degradation.
Given their importance, sourcing high-quality sand and gravel is essential for ensuring the longevity and success of any project.
Rockdale Sand & Gravel: A Commitment to Quality
Rockdale Sand & Gravel has built a reputation as a reliable supplier of premium sand and gravel products. Their commitment to quality and customer satisfaction sets them apart in the industry. Here’s what makes Rockdale Sand & Gravel a trusted name:
High-Quality Products: Rockdale Sand & Gravel offers a wide range of products that meet the highest standards. Their sand and gravel are sourced from reputable quarries and processed to ensure consistency and quality.
Extensive Product Range: They provide various types of sand and gravel, including construction sand, concrete sand, masonry sand, and different grades of gravel. This extensive range ensures that clients can find the perfect materials for their specific needs.
Expertise and Experience: With years of experience in the industry, Rockdale Sand & Gravel’s team has the expertise to advise clients on the best materials for their projects. Their knowledge ensures that customers receive products that meet technical specifications and project requirements.
Reliable Supply Chain: Timely delivery is critical in construction and landscaping projects. Rockdale Sand & Gravel has a robust supply chain that ensures products are delivered on schedule, minimizing project delays.
Sustainability Practices: Rockdale Sand & Gravel is committed to sustainable practices. They prioritize environmentally responsible sourcing and processing methods to reduce their ecological footprint.
Applications and Benefits
Construction Projects
In construction, the quality of sand and gravel directly impacts the strength and durability of structures. Rockdale Sand & Gravel’s products are used in various construction applications:
Concrete Production: High-quality sand and gravel are mixed with cement and water to create concrete. The right proportions and particle sizes ensure the concrete’s strength and durability.
Road Construction: Gravel is used as a base material in road construction, providing stability and support to the asphalt or concrete layers above.
Foundations and Footings: Strong foundations are essential for any building. Rockdale Sand & Gravel’s products ensure that foundations are stable and long-lasting.
Landscaping and Aesthetic Projects
In landscaping, the right materials can enhance the beauty and functionality of outdoor spaces:
Garden Pathways: Gravel is commonly used to create attractive and durable garden pathways. It provides a rustic look and prevents soil erosion.
Decorative Elements: Different grades and colors of gravel can be used to create visually appealing garden beds and decorative features.
Water Features: Sand and gravel are essential in constructing water features such as ponds and fountains, providing filtration and structural support.
Environmental and Practical Benefits
Using high-quality sand and gravel from a trusted supplier like Rockdale Sand & Gravel offers several benefits:
Durability: Projects built with high-quality materials are more likely to withstand environmental challenges and last longer.
Cost-Effectiveness: While high-quality materials may come at a premium, they often reduce long-term maintenance and repair costs, providing better value over time.
Aesthetic Appeal: Quality materials enhance the visual appeal of landscaping projects, adding value to properties and creating enjoyable outdoor spaces.
Why Choose Rockdale Sand & Gravel?
Choosing Rockdale Sand & Gravel means partnering with a supplier dedicated to excellence. Their commitment to quality, extensive product range, and customer-focused approach ensure that clients receive the best materials for their projects. Whether you are undertaking a large-scale construction project or a small landscaping endeavor, Rockdale Sand & Gravel provides the reliable products and expert support needed for success.
Conclusion
In the realms of construction and landscaping, the importance of high-quality sand and gravel cannot be overstated. Rockdale Sand & Gravel’s dedication to providing top-tier products and exceptional service makes them a trusted partner for a wide range of projects. By choosing Rockdale Sand & Gravel, you ensure that your projects are built on a foundation of quality and reliability, paving the way for successful and enduring outcomes. | rockdale06 | |
1,867,377 | Exploring the Intersection of JavaScript Development and Cryptocurrency Exchanges | Javascript, a versatile programming language, has found extensive applications in various domains,... | 0 | 2024-05-28T08:56:39 | https://dev.to/klimd1389/exploring-the-intersection-of-javascript-development-and-cryptocurrency-exchanges-3f71 | javascript, webdev, learning, development | Javascript, a versatile programming language, has found extensive applications in various domains, including web development, mobile app development, and more recently, in the realm of cryptocurrency exchanges. Cryptocurrency exchanges like Binance, KuCoin, WhiteBIT, and Bybit have incorporated JavaScript into their platforms to enhance user experience, facilitate trading functionalities, and develop robust trading algorithms.
JavaScript's popularity stems from its flexibility, as it allows developers to create dynamic and interactive web pages. This flexibility extends to the development of trading interfaces on cryptocurrency exchanges, where real-time data visualization, responsive design, and seamless user interaction are paramount. By leveraging JavaScript frameworks like React, Vue.js, or Angular, exchanges can deliver intuitive and feature-rich trading platforms that cater to the diverse needs of traders.
Moreover, JavaScript's asynchronous nature makes it well-suited for handling the asynchronous nature of cryptocurrency markets, where trades are executed in real-time and market conditions can change rapidly. By utilizing asynchronous programming techniques and WebSocket technology, cryptocurrency exchanges can stream live market data, update order books instantaneously, and execute trades with minimal latency, providing traders with a competitive edge in fast-moving markets.
Additionally, JavaScript's extensive ecosystem of libraries, frameworks, and development tools empowers developers to build sophisticated trading bots and algorithmic trading strategies. These trading bots can automate various aspects of trading, such as order execution, risk management, and portfolio rebalancing, thereby enabling traders to capitalize on market opportunities 24/7 without manual intervention.
In conclusion, the intersection of JavaScript development and cryptocurrency exchanges represents a fertile ground for innovation and technological advancement in the realm of finance. By harnessing the power of JavaScript, cryptocurrency exchanges can deliver cutting-edge trading platforms and tools that empower traders to navigate the dynamic world of digital assets with confidence and efficiency. | klimd1389 |
1,867,374 | Basic explanation of how whitelisting works in Solidity | You know what whitelisting is, but you also want to understand how it works under the hood. Now... | 0 | 2024-05-28T08:52:14 | https://dev.to/muratcanyuksel/basic-explanation-of-how-whitelisting-works-in-solidity-f19 | blockchain, web3, webdev, ethereum | You know what whitelisting is, but you also want to understand how it works under the hood. Now imagine you have an NFT collection, and you tell the community that people who buy your NFTs right now will have priority access to the upcoming online game you and your team have been developing.
How does that whitelisting actually occurs? How is it structured in solidity?
Almost always, the addressess that purchase the NFT will be added into a mapping. According to alchemy a mapping is a hash table in Solidity that stores data as key-value pairs. They are defined like:
mapping(address => bool) public whitelistedAddresses;
You see, the idea here is simple: When someone purchases one of your NFTs, you take their address, and put a truthy statement to it. That's what a bool is, it's a boolean. True, or false. If they have not purchased your NFT, their addresses will not be in the mapping anyway, so it will not be a truthy statement. When they do purchase, on inquiry their addresses will return a truthy statement and you'll know that they are whitelisted.
Then, you can basically do whatever you want with this whitelistedAddresses mapping. You can use it as a guard to certain functions and only whitelisted people can do such and such. | muratcanyuksel |
1,864,666 | GenAI Use Cases JPを試してみた | 5/15にJAWS-UGのイベントで開催されたAWS Expert Online『生成 AI ユースケースを考え倒すための Generative AI Use Cases JP... | 0 | 2024-05-28T08:48:44 | https://dev.to/aws-builders/genai-use-caseswoshi-sitemita-4img | japanese, bedrock, ai, aws | 5/15にJAWS-UGのイベントで開催されたAWS Expert Online『生成 AI ユースケースを考え倒すための Generative AI Use Cases JP の魅力と使い方』に参加して、実際に試してみた結果をまとめてみた。
スライド資料
{% embed https://speakerdeck.com/okamotoaws/sheng-cheng-aiyusukesuwokao-edao-sutamenogenerative-ai-use-cases-jp-genu-nomei-li-toshi-ifang %}
配信動画
{% embed https://www.youtube.com/live/s1P5A2SIWgc %}
## Generative AI Use Cases JPとは？
CDKでデプロイするだけで簡単に以下のユースケースを簡単に試すことができる。
* チャット
* 文章生成
* （文章）要約
* 校正
* 翻訳
* Webコンテンツ抽出
* 画像生成
* 映像分析
例えば、チャットでは以下のように補助金について聞いてみるとそれなりに結果が出てくる。
>> 石川県で創業した事業者が活用できる補助金について教えてください。
>
> 石川県で創業した事業者が活用できる主な補助金を以下に挙げます。
>
> 石川県創業支援事業費補助金
>
> 県内で創業する個人事業主や法人を対象とした創業支援補助金
> 補助率は2/3以内、上限100万円
>
> 金沢市創業支援事業補助金
>
> 金沢市内で創業する個人事業主や法人を対象とした創業支援補助金
> 補助率は2/3以内、上限100万円
>
> 中小企業庁の創業補助金
>
> 全国の創業者を対象とした国の補助金
> 最大200万円の補助が受けられる
>
> 日本政策金融公庫の創業支援資金
>
> 創業時の設備資金や運転資金として低利の融資を受けられる
> 補助金の内容や申請条件、募集時期などは年度によって変更になる場合があります。詳細は各自治体や支援機関のウェブサイトやパンフレットで最新情報を確認する必要があります。創業時の資金調達では、こうした公的支援を積極的に活用することをおすすめします。
また、映像分析も文字を識別できており、かなり正確な文章が生成できている。
> 画像には、ヤマハのリコーダーを手に持った男性の上半身が写っています。男性は格子柄のシャツを着ており、リコーダーを口に当てるポーズをしています。背景には窓と額縁が見えます。
## JAWS-UGとは？
[公式サイト](https://jaws-ug.jp/about-us/)を指定して、 Webコンテンツ抽出 のユースケースを実行した結果が以下の通り。（追加コンテキストに「要約して」を指定しました）
> JAWS-UG(AWS User Group - Japan)は、AWSのクラウドコンピューティングを利用する人々の集まり(コミュニティ)です。ボランティアによる勉強会の開催や交流イベントなどを行い、一人では得られない学びや交流を目的としています。日本全国に支部の形でグループを持ち、それぞれのテーマに基づいて活動しています。非営利目的で活動しています。
私は金沢支部のコアメンバーとして、今回の配信動画にも登場しています。
---
## デプロイ方法
[GitHub](https://github.com/aws-samples/generative-ai-use-cases-jp)に手順があり、簡単にデプロイすることができる。また、ソースコードを修正して試しながら実装を検討していくことができる。
なお、第三者に利用されないようにするために、[サインアップできるメールアドレスのドメインを制限する](https://github.com/aws-samples/generative-ai-use-cases-jp/blob/main/docs/DEPLOY_OPTION.md#%E3%82%B5%E3%82%A4%E3%83%B3%E3%82%A2%E3%83%83%E3%83%97%E3%81%A7%E3%81%8D%E3%82%8B%E3%83%A1%E3%83%BC%E3%83%AB%E3%82%A2%E3%83%89%E3%83%AC%E3%82%B9%E3%81%AE%E3%83%89%E3%83%A1%E3%82%A4%E3%83%B3%E3%82%92%E5%88%B6%E9%99%90%E3%81%99%E3%82%8B)は設定したほうが良い。
## トラブルシューティング
実際に試してみたところ以下のトラブルに遭遇した。
### ユースケースを試そうと思ってもエラーが発生して利用できない
以下のようなエラーが発生する場合には、[ドキュメントに記載](https://github.com/aws-samples/generative-ai-use-cases-jp?tab=readme-ov-file#%E3%83%87%E3%83%97%E3%83%AD%E3%82%A4)のある通り、Claude3 Sonnetのモデルリクエストを有効化する必要がある。
### モデルの有効化時にエラーが発生して有効化できない
有効化する場合にはクレジットカードの有効性を確認される。もし期限が切れているなどの場合には INVALID_PAYMENT_INSTRUMENT:A valid payment instrument must be provided. のエラーが発生する。 [支払設定画面](https://us-east-1.console.aws.amazon.com/billing/home?region=us-east-1#/paymentpreferences/paymentmethods)より確認して、有効期限内のクレジットカードを設定する。
### 画像生成のユースケースを試そうと思ってもエラーが発生して利用できない
画像生成で
You don't have access to the model with the specified model ID.
が発生する場合には、[Stability AI SDXL 1.0のモデルリクエストを有効化する必要がある](https://github.com/aws-samples/generative-ai-use-cases-jp/issues/505)。
## 気になるお値段は？
料金試算は[AWSのサイトに公開されている](https://aws.amazon.com/jp/cdp/ai-chatapp/)が、金額が高いので試すのに躊躇されている方も多いと思う。そこで、デフォルトの状態のまま（Kendoraを使わない）で少し遊んで、6日間放置してみた。
Claude 3 Sonnet、SDXL V1.0以外はコストがかかっていない状況で、実際に使った分だけの課金にできそうな感覚をもった。
実際に試す際には課金状況を確認しながら少しずつ遊んでみることをオススメする。
 | matyuda |
1,867,373 | Guide: How to Develop Web3 DApps on Mint Blockchain Using NFTScan API | Mint Blockchain is an L2 blockchain built on the OP Stack that focuses on innovation in the NFT... | 0 | 2024-05-28T08:47:23 | https://dev.to/nft_research/guide-how-to-develop-web3-dapps-on-mint-blockchain-using-nftscan-api-2690 | nft, web3, api | Mint Blockchain is an L2 blockchain built on the OP Stack that focuses on innovation in the NFT space. It is dedicated to promoting innovation in NFT asset protocol standards and the widespread adoption of NFT assets in real-world commercial scenarios. The underlying ledger security of Mint Blockchain is fully based on the security consensus of the Ethereum network.
As an L2 network, it is a public blockchain network that is fully compatible with the EVM, allowing developers in the Ethereum ecosystem to seamlessly expand their projects to the Mint Blockchain network, providing effective scalability for the Ethereum ecosystem.
According to data from NFTScan, as of May 27th, Mint Blockchain has issued a total of 401,104 NFT assets, with 67 NFT contracts, 403,183 interaction records, 381,169 wallet addresses that have interacted, and a total transaction volume of 0.25 ETH.
Explore it now: https://mint.nftscan.com/
**Create an NFTScan Developer Account**
Before using the NFTScan API, you need to visit the developer’s website and create an account. Go to the NFTScan official website and click the “Sign Up” button for the NFTScan API to register.
Click here: https://developer.nftscan.com/user/signup
After logging in, find your unique API KEY on the Dashboard. Visit the API documentation and enter your API KEY in the appropriate location. Follow the instructions in the documentation to start using the API service. In the API documentation, developers can find various interface modes to choose from and select the most suitable one based on their needs.
In the Dashboard, developers can also view statistical data on their API usage, which helps track historical usage data. Additionally, NFTScan provides 1M CU of API call service to all registered developers for requesting all NFT API interfaces, and the CU never expires until it is used up!
**Check Mint NFT API Docs**
After successfully registering a developer account and obtaining your API Key, you will need to access the NFTScan API documentation. The API documentation contains all available API endpoints and parameters, as well as detailed information on how to construct requests and handle responses. Please read the API documentation carefully and ensure that you understand how to use the API to retrieve the data you need. The NFTScan API service aims to help developers improve their experience in accessing NFT data analysis.
Currently, NFTScan has the largest and most comprehensive NFT Collection library across 20+ blockchains including Ethereum, Solana, BNBChain, Bitcoin, TON, Polygon, zkSync, Aptos, Linea, Base, Avalanche, Arbitrum, OP Mainnet, Starknet, Scroll, Blast, Viction, Fantom, Mantle and more. It covers a wide range of NFT data, providing a complete set of interfaces to obtain ERC721 and ERC1155 assets, as well as transaction, project, and market statistics. It now supports over 60 public interfaces for EVM-compatible chains and a batch of similar model interfaces for Solana, Aptos, Bitcoin, and TON, greatly satisfying developers’ needs to index various types of NFT data.
**Mint NFT API Models**
The Mint NFT API includes three main models, providing developers with detailed information and descriptions of the core fields within these models. This enables developers to retrieve data and utilize the information to effectively serve their Dapp services.
Assets API: “Assets” represent the most crucial data fields within NFTs, uniquely identifying and describing digital assets. Developers can gain comprehensive insights and build relevant applications by extracting the “Assets” data from the Mint Blockchain. The “Assets” object provides the unique identification of digital assets, along with data about their entire lifecycle, laying the foundation for developers to understand and leverage NFTs.
Transactions API: The transactions model represents the complete history of all transactions related to an NFT asset on the blockchain, offering developers insights into the full lifecycle of NFT transactions. This includes minting, transfers, sales, and other transaction activities, allowing developers to gain an in-depth understanding of the flow and evolution of NFT assets within the Mint ecosystem. NFTScan continuously aggregates NFT transaction data from various blockchain networks, facilitating developers in tracking and understanding the dynamics of the NFT market. This data also assists developers in building NFT-based applications and tools.
Collections API: The Collections API provides NFTScan with off-chain data related to NFT collections, including descriptions, social media information, and other basic details. NFTScan retrieves this information through APIs provided by leading NFT markets across different blockchain networks. Additionally, the current floor price information is based on centralized data obtained through API from NFT market orders and is available for developers to access.
**Mint NFT API Retrieval**
**1/Retrieve Assets Series**
- Get NFTs by account (Retrieve NFTs using a wallet address)
- Get all NFTs by account (Retrieve all NFTs associated with a wallet address and group them by contract address. If the total number of NFTs owned by the account exceeds 2000, the returned NFTs will be limited to 2000 or less. In such cases, developers and users can use pagination queries to retrieve all NFTs owned by the account.)
- Get minted NFTs by account (Retrieve NFTs minted by a specific wallet address)
- Get NFTs by contract (Retrieve NFTs using a contract address, sorted by token_id in ascending order)
- Get single NFT (Retrieve details of a single NFT)
- Get multiple NFTs (Retrieve details of multiple NFTs from different contract addresses simultaneously)
- Search NFTs (This interface returns a list of NFT assets by applying search filters in the request body. Assets are sorted by nftscan_id in ascending order.)
- Get NFTs by attributes (This interface returns a set of NFTs belonging to contract addresses with specific attributes. NFTs are sorted by token_id in ascending order.)
- Get all multi-chain NFTs by account (This interface returns all multi-chain NFTs owned by a specific wallet address, grouped by contract address.)
Here we retrieve the detailed information of NFTs under a contract address using the “Get NFTs by contract” API endpoint “/v2/assets/{contract_address}”, with the path parameter of contract_address as the selection.
In this case, we are querying the detailed data of NFTs under the contract address 0x776fcec07e65dc03e35a9585f9194b8a9082cddb, named GreenID.
Click on Try it, the data is retrieved as follows, the data response shows the basic data and metadata information of all items in the NFT Collection. Here we select GreenID, you can see that there are a total of 374248 items in this project, and the returned data is sorted by token_id. For example, the item with id 1:
A single item data:
0x776fcec07e65dc03e35a9585f9194b8a9082cddb, named GreenID, with NFT Token id 1, representing 1% in the project. The protocol standard is erc721. Data includes the wallet address of the owner at the time of minting, timestamp of minting/hash address of Mint, Token URI address, latest_trade_price, latest_trade_symbol, latest_trade_timestamp, etc.
Metadata: Metadata for this project is hosted on IPFS, with token_uri at https://www.mintchain.io/api/tree/metadata/1. Format is image/png, and includes storage path and description of detailed features of the image.
Rarity description: Includes score and overall rarity ranking.
**2/ Retrieve Transactions Series**
- Get transactions by account (This interface retrieves a list of NFT transactions for a wallet address)
- Get transactions by contract (This interface retrieves a list of NFT transactions for an NFT contract address
- Get transactions by NFT (This interface retrieves a list of NFT transactions for a single NFT)
- Search transactions (This interface retrieves a list of NFT transactions by applying search filters in the request body)
- Get transactions by address (This interface retrieves a list of NFT transactions filtered by transaction parameters)
- Get transactions by hash (This interface retrieves transaction records based on a list of transaction hashes)
Here we can retrieve the transaction records of a specific NFT contract address by using the “Get transactions by NFT” “/v2/transactions/{contract_address}/{token_id}” endpoint. The query parameters allow us to select the NFT event types (Mint/Transfer/Sale/Burn) by using ‘;’ to separate multiple events.
In this case, we are retrieving the Mint transaction records of the NFT token with tokenID 1. We can choose to include all event types (Mint/Transfer/Sale/Burn) in the query. The response data will contain key transaction details for all transactions related to this NFT item, such as transaction hash, From and To addresses, block information, gas consumption, transaction timestamp, and other basic data about the NFT transactions. The data returned shows that there is currently only one Mint-related transaction record for this item.
**3/ Retrieve Collections series**
- Get an NFT collection (Retrieve details based on the contract address of the collection, including an overview and categorization of items based on their descriptions, distribution of owners, average price, floor price, and other basic information)
- Search NFT collections (This endpoint retrieves a list of Collection information by applying search filters in the request body. Collections are sorted in ascending order based on deployment block number)
- Get NFT collections by account (This endpoint retrieves a list of collections associated with a given account address, sorted by floor price from highest to lowest)
- Get NFT collections by ranking (This endpoint retrieves a list of collections with a given ranking field, sorted based on the given sorting field and sorting direction)
Here we retrieve details of an NFT collection with the address 0x776fcec07e65dc03e35a9585f9194b8a9082cddb and the name GreenID through the API endpoint “/v2/collections/{contract_address}”.
**4/ Collection Statistics: Statistical Analysis for Collection**
- Collection Statistics (This interface provides an analytical overview of NFT Collection statistics)
- Collection Trade Distribution (This interface primarily provides the distribution of project trades)
- Collection Trending Statistics (Mainly returns trading statistics ranking for a project)
- Collection Holding Amount Distribution (This interface can provide information on the distribution of NFT project holdings)
- Collection Holding Period Distribution (Data returns information about the distribution of NFT project holding periods)
- Collection Blue Chip Statistics (Overview statistics for blue-chip projects)
- Collection Blue Chip List (List of blue-chip projects associated with the project, referring to NFTScan Blue Chip Collection)
- Collection Top Holder (Distribution of the top holders of the Collection)
Here we mainly return the distribution of holders for an NFT Collection through the interface Collection Top Holder “/v2/statistics/collection/holder/{contract_address}”, which can be referred to as NFTScan Holders.
**5/ Account Statistics Series**
- Account Overview Statistics (This interface returns an overview of statistical information for an account address, refer to NFTScan Overview)
- Account Holding Distribution (This interface returns statistical information on the distribution of NFT holdings for an account address, refer to NFTScan Portfolio)
- Account Holding NFT Trending (This interface returns statistical information on the trending NFT holdings or quantities for an account address, refer to NFTScan Portfolio)
**6/ Analytic Statistics Series**
This series of APIs is commonly used to retrieve data analysis and statistics-related information on the NFT Explorer of Mint, such as Trade Ranking and Mint Amount. Such APIs allow developers or users to query, analyze, and retrieve statistical data related to specific data sets or indicators and can be used for various purposes, including market analysis, trend tracking, investment decision-making, and understanding the nature of specific data.
**7/ Refresh Metadata**
Refresh NFT metadata
Refresh NFT metadata by contract
Interfaces like Refresh Metadata can assist developers or users in submitting backend tasks to refresh metadata. Once reviewed, these tasks will refresh the specified item or the entire contract metadata.
**8/ Other**
- Get the latest block number (Retrieve the latest block number reached by NFTScan)
- Get the latest reorganization block numbers
- Get NFT amount by account (Retrieve the quantity of ERC721 and ERC1155 NFT owned by the account address provided in the request body)
- Get NFT owners by contract (Retrieve a list of owners of ERC721 NFTs for the given contract address, sorted by token_id)
- Get owners by an NFT (Retrieve a list of owners of ERC1155 NFTs, sorted by account address)
**Building NFTAPI Requests**
Building NFTAPI requests related to NFTScan is very simple and convenient. Developers just need to browse the API documentation to find the desired endpoints, and understand the endpoint URL, request method, parameters, etc. Then, based on their requirements, they can choose a programming language such as JavaScript, Python, Java, etc. and use the HTTP request library of that language to send the constructed requests to the endpoint URL. When writing the code, developers just need to organize the API parameters, such as contract address, API Key, etc., and call the corresponding NFTScan endpoint to retrieve standardized JSON data easily.
Here, we use the API endpoint “Get an NFT collection”/v2/collections/{contract_address} to fetch details data of the GreenID project on MintBlockchain with the contract address 0x776fcec07e65dc03e35a9585f9194b8a9082cddb. We can make an HTTP GET request to NFTScan’s API endpoint using Python’s requests library like this:
import requests
def get_nft_collection_details(contract_address, api_key): base_url = "https://api.nftscan.com/v2/collections/" url = f"{base_url}{contract_address}" headers = { "Content-Type": "application/json", "x-api-key": api_key }
response = requests.get(url, headers=headers)
if response.status_code == 200:
return response.json()
else:
return {"error": f"Failed to retrieve data: {response.status_code}"}
Example usage
contract_address = "0x776fcec07e65dc03e35a9585f9194b8a9082cddb" api_key = "your_api_key_here"
nft_details = get_nft_collection_details(contract_address, api_key) print(nft_details)
Code Interpretation:
Import requests library: Use import requests to import the required library.
Define function get_nft_collection_details:
contract_address: NFT contract address.
api_key: API Key for authentication.
Build URL: Concatenate the base URL with the contract_address.
Set request headers: Including Content-Type and x-api-key, the latter is used for authentication.
Send request: Use requests. get to send a GET request.
Handle response:
If the request is successful (status code 200), return JSON data.
Otherwise, retrieve an error message.
This code is just an example, developers should refer to the actual application for construction. Make sure to replace your_api_key_here with the actual API Key.
NFTScan is the world’s largest NFT data infrastructure, including a professional NFT explorer and NFT developer platform, supporting the complete amount of NFT data for 20+ blockchains including Ethereum, Solana, BNBChain, Arbitrum, Optimism, and other major networks, providing NFT API for developers on various blockchains.
Official Links:
NFTScan: https://nftscan.com
Developer: https://developer.nftscan.com
Twitter: https://twitter.com/nftscan_com
Discord: https://discord.gg/nftscan | nft_research |
1,867,372 | The Best Wiper Blades for Different Weather Conditions | When it comes to driving, one of the most critical yet often overlooked components of vehicle safety... | 0 | 2024-05-28T08:46:51 | https://dev.to/zhong_xiaoge_13ee506563c1/the-best-wiper-blades-for-different-weather-conditions-55mm | When it comes to driving, one of the most critical yet often overlooked components of vehicle safety is the humble wiper blade. Ensuring clear visibility during adverse weather conditions is essential, and having the right wiper blades can make a significant difference.
In this blog post, we'll explore the best [wiper blades](https://www.topexwiper.com/wiper-blade/) suited for various weather conditions, ensuring that you're prepared for whatever Mother Nature throws your way.
### Best For: General Use in Mild Climates
All-season wiper blades are designed to perform adequately throughout the year, providing a balanced mix of durability and performance. These blades are typically made of rubber or a blend of rubber and synthetic materials, which allows them to handle light rain, mild snow, and occasional debris.
## Winter Wiper Blades
## Best For: Snow and Ice Conditions
Winter wiper blades are specifically designed to handle the harsh conditions of snow and ice. These blades are usually constructed with a durable rubber shell that prevents ice from accumulating on the blade itself, ensuring that it remains flexible even in freezing temperatures.
TOPEX wiper blades are an excellent choice for winter driving. They feature a rugged armor that encloses the blade, preventing ice and snow buildup. The heavy-gauge construction and durable rubber material ensure that the blade remains flexible and effective, even in sub-zero temperatures.
## Summer Wiper Blades
## Best For: High Heat and Sun Exposure
In hot climates, wiper blades are subject to intense UV rays and high temperatures, which can cause ordinary rubber to crack and deteriorate. Summer wiper blades are made with heat-resistant materials that can withstand prolonged sun exposure without losing their effectiveness.
## Heavy Rain Wiper Blades
## Best For: Torrential Downpours
For areas that experience heavy rainfall, wiper blades need to be able to handle large volumes of water efficiently. These blades often have a streamlined design that minimizes drag and maximizes wiping efficiency.
The TOPEX wiper blades are designed for superior performance in heavy rain. They feature an integrated spoiler that enhances aerodynamic performance, reducing lift and chatter at high speeds. The advanced rubber technology ensures a smooth, streak-free wipe, providing maximum visibility in heavy downpours.
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Vehicles in coastal areas face unique challenges such as salt air and high humidity, which can accelerate the deterioration of wiper blades. Blades designed for these conditions often feature materials resistant to corrosion and wear.
## Conclusion
Choosing the right wiper blades for your vehicle is crucial for maintaining optimal visibility and safety in various weather conditions. Whether you face the icy blasts of winter, the scorching heat of summer, or the heavy rains of the monsoon season, there’s a wiper blade designed to meet your needs.
Investing in quality wiper blades not only ensures your safety but also enhances your driving experience, allowing you to navigate any weather with confidence. If you have any questions about our products, please feel free to [contact us](https://www.topexwiper.com/contact-us/).
| zhong_xiaoge_13ee506563c1 | |
1,867,371 | Building Dynamic Web Applications with React: A Comprehensive Guide | React project refers to a web application or a component-based user interface created using React, a... | 0 | 2024-05-28T08:39:41 | https://dev.to/andylarkin677/building-dynamic-web-applications-with-react-a-comprehensive-guide-3g31 | webdev, javascript, programming, devops | React project refers to a web application or a component-based user interface created using React, a popular JavaScript library developed by Facebook for building user interfaces, especially single-page applications (SPAs). React allows developers to create reusable UI components, manage state efficiently, and build dynamic and interactive web applications.
Key Concepts in a React Project:
Components:
React applications are built using components, which are independent and reusable bits of code. A component can be a class component or a functional component.
Each component represents a part of the user interface, such as a button, form, or an entire page.
Components can have their own state and lifecycle methods.
JSX:
JSX (JavaScript XML) is a syntax extension for JavaScript that looks similar to HTML. It allows developers to write HTML-like code within JavaScript.
JSX is transpiled to JavaScript by tools like Babel.
State and Props:
State: Managed within a component, state holds data that can change over time and affect how the component renders.
Props: Short for properties, props are read-only data passed from a parent component to a child component.
Virtual DOM:
React uses a virtual DOM, a lightweight representation of the actual DOM. When a component’s state changes, React updates the virtual DOM and efficiently reconciles those changes with the real DOM.
Hooks:
Introduced in React 16.8, hooks allow developers to use state and other React features in functional components. Common hooks include useState, useEffect, useContext, etc.
Lifecycle Methods:
Class components have lifecycle methods that allow developers to execute code at specific points in a component’s lifecycle, such as componentDidMount, componentDidUpdate, and componentWillUnmount.
Steps to Create a React Project:
Set Up Development Environment:
Install Node.js and npm (Node Package Manager) or Yarn.
Use Create React App (CRA) to set up a new React project quickly:
npx create-react-app my-react-app
cd my-react-app
npm start
Build Components:
Create functional or class components as needed.
Use JSX to define the structure of the components.
Manage State and Props:
Use useState to manage state in functional components.
Pass data between components using props.
Routing:
Use React Router to manage navigation and routing in the application.
npm install react-router-dom
Styling:
Style components using CSS, CSS-in-JS libraries like styled-components, or pre-processors like SASS.
APIs and Data Fetching:
Fetch data from APIs using tools like fetch, axios, or React Query.
Manage side effects with useEffect.
Build and Deploy:
Build the project for production using npm run build.
Deploy the built files to a hosting service like Vercel, Netlify, or GitHub Pages.
Example:
// App.js
import React, { useState } from 'react';
import './App.css';
function App() {
const [count, setCount] = useState(0);
return (
<div className="App">
<header className="App-header">
<h1>React Counter</h1>
<p>{count}</p>
<button onClick={() => setCount(count + 1)}>Increment</button>
<button onClick={() => setCount(count - 1)}>Decrement</button>
</header>
</div>
);
}
export default App;
Conclusion:
A React project allows developers to build powerful, interactive, and dynamic web applications with ease. The modular nature of components, the efficiency of the virtual DOM, and the extensive ecosystem of tools and libraries make React a popular choice for modern web development. | andylarkin677 |
1,867,365 | Best Tally on Cloud Service Provider | By using the best features and services, you can access your tally from anywhere and any place. Start... | 0 | 2024-05-28T08:31:05 | https://dev.to/hosting_safari_3f76fb58db/best-tally-on-cloud-service-provider-48bd | tally, tallyoncloud, tallycloud, tallyaws | By using the best features and services, you can access your tally from anywhere and any place. Start your **[tally on cloud free demo](https://www.hostingsafari.com/tally-on-cloud/)** now. | hosting_safari_3f76fb58db |
1,867,364 | Unveiling GitHub: The Premier Platform for Developers | GitHub has revolutionized the way developers collaborate on projects, making it an indispensable tool... | 0 | 2024-05-28T08:28:50 | https://dev.to/alexroor4/unveiling-github-the-premier-platform-for-developers-5bb6 | webdev, javascript, programming | GitHub has revolutionized the way developers collaborate on projects, making it an indispensable tool in the world of software development. Launched in 2008, GitHub is a web-based platform that leverages Git, a distributed version control system, to facilitate collaborative coding and project management. Here’s an in-depth look at what makes GitHub the go-to platform for developers around the globe.
What is GitHub?
At its core, GitHub is a hosting service for Git repositories. It provides a centralized location for developers to store their code, track changes, collaborate on projects, and share their work with others. Whether you’re an individual developer working on personal projects or a large team managing complex software, GitHub offers tools and features that streamline the development process.
Key Features of GitHub
Repositories
A repository, or “repo,” is a project’s file directory and history. On GitHub, you can create repositories for your projects, which can be public (accessible to everyone) or private (restricted access). Each repository contains all of the project's files and the revision history, making it easy to track and manage changes over time.
Version Control with Git
GitHub utilizes Git for version control. Git allows developers to keep track of changes in their code, collaborate without overwriting each other's work, and revert to earlier versions if something goes wrong. This system of branching and merging is crucial for managing the iterative nature of software development.
Forking and Pull Requests
One of GitHub’s most powerful features is the ability to fork repositories. When you fork a repository, you create a personal copy of another user’s project that you can modify. Pull requests enable you to propose changes to the original repository. This workflow fosters collaboration by allowing developers to contribute to projects without directly altering the original codebase.
Collaboration Tools
GitHub is more than just a code repository; it’s a social platform for developers. Features such as Issues and Projects help teams manage their work by tracking tasks, bugs, and enhancements. Discussions, code reviews, and comments facilitate communication and ensure that quality standards are met.
GitHub Pages
Developers can use GitHub Pages to host static websites directly from their repositories. This feature is particularly useful for project documentation, personal portfolios, or even simple web applications.
Continuous Integration and Deployment
GitHub integrates seamlessly with CI/CD tools, including its own GitHub Actions. These integrations automate the testing, building, and deployment processes, ensuring that code changes are reliable and consistent before they are released.
Learning and Community Support
GitHub’s Learning Lab offers interactive courses that help developers learn about Git, GitHub, and various aspects of software development. The vibrant GitHub community provides support, shares knowledge, and collaborates on open-source projects.
Why GitHub?
GitHub’s combination of robust version control, powerful collaboration features, and extensive community support makes it a cornerstone of modern software development. By providing a platform where developers can easily share and improve code, GitHub has fostered a culture of open-source collaboration and innovation.
Whether you’re managing a solo project or contributing to some of the world’s largest open-source initiatives, GitHub offers the tools and resources necessary to elevate your development process. Embrace the power of GitHub and join millions of developers in building the future of software.
This article highlights the essential features and benefits of GitHub, making it clear why it’s such a critical tool for developers worldwide. | alexroor4 |
1,867,363 | Application error: a client-side exception has occurred (see the browser console for more information). | Hi, I'm experiencing an issue with dynamic routing in my Next.js application when deployed on... | 0 | 2024-05-28T08:25:17 | https://dev.to/basit2023/application-error-a-client-side-exception-has-occurred-see-the-browser-console-for-more-information-3ife | help | Hi,
I'm experiencing an issue with dynamic routing in my Next.js application when deployed on cPanel. This issue does not occur during local development. The error message is:
`Application error: a client-side exception has occurred (see the browser console for more information).
The console log shows the following error:`
`https://prosale.cloud/_next/static/chunks/app/(hydrogen)/employee/%5Bid%5D/edit/page-7ae4d87d174c4f0f.js net::ERR_ABORTED 404 (Not Found)
ChunkLoadError
at __webpack_require__.f.j (webpack-2a0249f03633b4d2.js:1:13047)
...`
The file page-6d6c06c2fb38fc4a.js is present in the correct directory on the server. I've ensured that all files are correctly built and uploaded. Could someone guide me on how to resolve this issue with the dynamic route?
Thank you! | basit2023 |
1,867,344 | Building a simple Referral System API with Laravel 11 | With the use of special referral codes, referral systems are an effective marketing technique that... | 0 | 2024-05-28T08:24:49 | https://dev.to/quietnoisemaker/building-a-simple-referral-system-api-with-laravel-11-2aom | beginners, php, laravel, api |
With the use of special referral codes, referral systems are an effective marketing technique that encourages current customers to promote business offerings. For those who are new to using Laravel 11 and want to handle user referrals through APIs, this tutorial will show you how to create a basic referral system API.
**Let's get started.**
Prerequisites:
- Basic understanding of PHP, Laravel concepts, and RESTful APIs
- A local development environment with Laravel 11 installed
- A database (e.g., MySQL) configured with Laravel
## Step 1: Project Setup and Modify the User Migration Schema
Create a new Laravel project using the Artisan command and navigate to the project directory. We'll need a table to store user information. Laravel provides a User model by default.
Go to the users migration and modify accordingly.
```
Schema::create('users', function (Blueprint $table) {
$table->id();
$table->string('name');
$table->string('email')->unique();
$table->timestamp('email_verified_at')->nullable();
$table->rememberToken();
$table->string('referral_code')->index()->unique();
$table->unsignedBigInteger('referred_by')->nullable();
$table->integer('referral_count')->default(0);
$table->string('password');
$table->timestamps();
$table->foreign('referred_by')->references('id')->on('users')->onUpdate('cascade')->onDelete('set null');
});
```
Then run the php artisan migrate to run your migrations.
## Step 2: Define API route
We'll create two main API endpoints to manage referrals:
- POST /users - This endpoint will handle user registration and potentially generate a referral code for the new user.
- GET /users/{user}/referrals - This endpoint will retrieve referral data for a specific user
Enable API routing using the `install:api` Artisan command and define the route in your `routes/api.php` file.
**Note:**
The `install:api` command installs Laravel Sanctum, which provides a robust, yet simple API token authentication guard which can be used to authenticate third-party API consumers, SPAs, or mobile applications. In addition, the `install:api` command creates the `routes/api.php` file: read more [https://laravel.com/docs/11.x/routing](https://laravel.com/docs/11.x/routing).
```
Route::prefix('/users')->group(function () {
Route::post('/', [UserReferralProgramController::class, 'store']);
Route::get('/{user}/referrals', [UserReferralProgramController::class, 'fetchUserReferral']);
});
```
Consider using versioning in your API URL structure (e.g., /api/v1/users) to maintain flexibility for future changes. You may change the prefix by modifying your application's **bootstrap/app.php** file.
```
->withRouting(
web: __DIR__ . '/../routes/web.php',
api: __DIR__ . '/../routes/api.php',
commands: __DIR__ . '/../routes/console.php',
health: '/up',
apiPrefix: 'api/v1',
)
```
## Step 3: Define Methods in your Controller
Run the command `php artisan make:controller Api/UserReferralProgramController`
Goto **app\Http\Controllers\Api\UserReferralProgramController.php** and define the methods. Later, we shall return to the controller.
```
class UserReferralProgramController extends Controller
{
/**
* Store a newly created resource in storage.
*/
public function store(UserStoreRequest $request): void
{
}
/**
* fetch user referrals.
*/
public function fetchUserReferral(User $user): void
{
}
}
```
## Step 4: Utilize the service class(if applicable).
run the command `php artisan make:class Service/ReferralCodeGenerator` to create the class
```
<?php
namespace App\Service;
use App\Models\User;
class ReferralCodeGenerator
{
/**
* Generates a random referral code.
*
* This method generates a random string of specified length using the provided character set.
* It then checks for existing codes in the database and regenerates if necessary.
*
* @return string The generated referral code.
*
* @throws \Exception If an error occurs during code generation or validation.
*/
public function generate(): string
{
$codeLength = 10;
$characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$code = '';
$code = substr(str_shuffle(str_repeat($characters, 5)), 0, $codeLength);
return $this->checkAndRegenerate($code);
}
/**
* Checks if a referral code already exists in the database and regenerates if necessary.
*
* This method takes a generated referral code as input and checks if it exists in the database.
* If the code already exists, it regenerates a new code using the `generate` method and calls itself recursively to check again.
* This process continues until a unique, non-existing code is found.
*
* @param string $code The referral code to be checked.
*
* @return string A unique, non-existing referral code.
*
*/
private function checkAndRegenerate(string $code): string
{
if (User::where('referral_code', $code)->exists()) {
return $this->checkAndRegenerate($this->generate());
}
return $code;
}
/**
* Finds a user by referral code and increments their referral count in a single database query.
*
* This method takes a referral code as input and attempts to find a matching user in the database.
* If a user is found, it atomically increments their `referral_count` by 1 and retrieves the user's ID.
*
* This method utilizes a single database query with Laravel's `update` method and raw expressions for efficiency.
*
* @param string $referralCode The referral code to be checked.
*
* @return int|null The user ID if found, otherwise null.
*
*/
public function getUserIdByReferralCodeAndIncrementCount(string $referralCode): int|null
{
$userId = User::where('referral_code', $referralCode)->value('id');
if ($userId) {
$this->incrementReferralCount($userId);
return $userId;
}
return null;
}
private function incrementReferralCount(int $userId): void
{
User::where('id', $userId)->increment('referral_count');
}
}
```
**Code Explanation:**
The **ReferralCodeGenerator** class provides functionality to generate unique referral codes and manage user referral counts. Here's a summary:
1. **generate** Method: Creates a random 10-character referral code using a specified character set and ensures its uniqueness by checking against the database.
2. **checkAndRegenerate** Method: Recursively verifies the uniqueness of a referral code and regenerates it if necessary.
3. **getUserIdByReferralCodeAndIncrementCount** Method: Finds a user by referral code, increments their referral count atomically, and returns the user's ID.
4. **incrementReferralCount** Method: Increments the referral_count of a user by their ID.
This class ensures that generated referral codes are unique and facilitates updating user referral counts efficiently.
## Step 8: Modify our existing Controller
Let’s go back to our controller **app\Http\Controllers\Api\UserReferralProgramController.php** and make some modifications.
```
class UserReferralProgramController extends Controller
{
/**
* Create a new class instance.
*/
public function __construct(public ReferralCodeGenerator $referralCodeGenerator)
{
//
}
/**
* Store a newly created resource in storage.
*/
public function store(UserStoreRequest $request): JsonResponse
{
$validatedData = $request->validated();
$referredBy = null;
if ($request->has('referral_code')) {
$referredBy = $this->referralCodeGenerator->getUserIdByReferralCodeAndIncrementCount($request->referral_code);
}
$requestData = array_merge(
$validatedData,
[
'referred_by' => $referredBy,
'referral_code' => $this->referralCodeGenerator->generate()
]
);
$user = User::create($requestData);
return response()->json([
'message' => 'user created',
'data' => $user
], Response::HTTP_CREATED);
}
/**
* fetch user referrals.
*/
public function fetchUserReferral(User $user): JsonResponse
{
$referrals = User::where('referred_by', $user->id)->get();
return response()->json([
'message' => 'success',
'data' => [
'referrals_count' => $user->referral_count,
'referrals' => $referrals
]
], Response::HTTP_OK);
}
}
```
In our controller method:
- I Initialized the controller with a ReferralCodeGenerator instance, which is used for generating and validating referral codes.
- Also validated the incoming request data (name, email, password, etc.).
- If a referral_code parameter is present in the request, use it to find the referring user.
- Created a new User model instance with the provided data and generated code.
- Saved the user to the database and potentially update the referring user's referral count
- Returned a successful response with relevant user information (excluding password) or an error response in case of validation issues or database errors.
**Remember**
This example has been simplified. Ensure that your system is production-ready by integrating _strong authentication methods_, _Database transaction_, _resource to transform the result_, _extensive error handling_, and extra features depending on your requirements.
Using Laravel 11, you can create a robust referral system API that facilitates user growth and acquisition for your application by following these instructions and experimenting with advanced features.
**Test our Endpoint on POSTMAN**
- `{{url}}/api/v1/users` to store users
- `{{url}}/api/v1/users/:userId/referrals` to fetch user referrals
You can get the complete code from [https://github.com/quitenoisemaker/import_excel_file](https://github.com/quitenoisemaker/import_excel_file)
| quietnoisemaker |
1,867,202 | What do you think about learn code from source code? | A post by rifqi febrianto | 0 | 2024-05-28T05:06:19 | https://dev.to/qee3i/what-do-you-think-about-learn-code-from-source-code-9c6 | webdev, productivity, programming, coding | qee3i | |
1,867,362 | Wiring the World: Hebei Huatong's Diverse Cable Products | Wiring the World: Hebei Huatong's Diverse Cable Products Wires, as well as cables, resemble... | 0 | 2024-05-28T08:24:38 | https://dev.to/xjsjw_cmksjee_e594b674d22/wiring-the-world-hebei-huatongs-diverse-cable-products-6c1 | cables | Wiring the World: Hebei Huatong's Diverse Cable Products
Wires, as well as cables, resemble capillaries as well as arteries of the contemporary world. Without all of them, electrical power, information, as well as various other essential indicators will certainly not have the ability to stream from one location to another. This is actually why the function of business such as Hebei Huatong is therefore essential. They offer a wide variety of cable products that are utilized in various markets. We'll check out a few of the benefits of Hebei Huatong's cables, in addition to their ingenious functions, and precautions, as well as ways to utilize all of them.
Benefits of Hebei Huatong's Cables
The very initial benefit of Hebei Huatong's Mining Cable is their resilience. These cables are developed towards the final, also in severe atmospheres. They are created from top quality products as well as go through extensive screening to guarantee that they can easily endure severe temperature levels, wetness, as well as various other possibly harming aspects.
Another benefit of Hebei Huatong's cables is their flexibility. They are available in a wide variety of dimensions, forms, as well as kinds, which makes all of them appropriate for various requests. Whether you require cables for a fast information gearbox, energy gearbox, or even sound/video clip indicators, Hebei Huatong has an item that will certainly help you.
Development in Hebei Huatong's Cable Products
Hebei Huatong is continuously pressing the limits of cable wires innovation. They are constantly searching for methods to enhance their products as well as create all of them much a lot extra effective, much more secure, as well as simpler to utilize. Among their very most ingenious products is the fiber optic cable, which utilizes illumination to transfer information rather than electrical power. These cables can transfer big quantities of information over far away along with very little indicator reduction.
Security Steps in Hebei Huatong's Cable Products
Security is a leading concern at Hebei Huatong. They get every safety measure to guarantee that their cables are risk-free towards utilization as well as will not trigger any type of harm towards individuals or even residential or commercial homes. This consists of utilizing top-quality products, sticking towards stringent production requirements, as well as carrying out comprehensive screening on all of their products.
Ways to Utilize Hebei Huatong's Cable Products
Utilizing Hebei Huatong's cable products is simple. Just select the appropriate cable for your application, as well as ensure it is set up properly. It is essential to comply with all security standards as well as regional policies when setting up cables. Speak with an expert if you are uncertain about ways to set up cables correctly.
Solution as well as Quality coming from Hebei Huatong
Hebei Huatong is proud on its own of offering exceptional customer support as well as top-quality products. Their group of professionals is constantly offered to respond to any type of concerns or even issues you might have actually. They likewise deal extensive guarantees on all of their products, therefore you could be positive that you are obtaining the finest worth for your cash.
Requests of Hebei Huatong's Cable Product
Hebei Huatong's metal clad cable products are utilized in various markets, consisting of telecom, energy gearbox, building, as well as transport. A few of their very most typical requests consist of:
- Information focuses
- Telecom systems
- Commercial automation
- Wind as well as solar energy age group
- Fast rail as well as train bodies
- Domestic as well as industrial building
Source: https://www.htcablewire.com/Mining-cable | xjsjw_cmksjee_e594b674d22 |
1,867,361 | The Role of Data Analytics in Remote Work | The global healthcare crisis of 2019 forced several industries to adopt a remote work culture. It has... | 0 | 2024-05-28T08:24:28 | https://dev.to/sganalytics/the-role-of-data-analytics-in-remote-work-3g29 | dataanalytics, analytics, remote, workplace | The global healthcare crisis of 2019 forced several industries to adopt a remote work culture. It has dominated offices, exhibiting several pros and cons concerning employee productivity. However, analytics can help evaluate the hybrid work mode's suitability for your organization. After all, you want to benefit from virtual collaborations enabled by work-from-home (WFH) platforms. This post will explore the role of data analytics in remote work for team improvement and performance boost.
## What is the Role of Data Analytics in Remote Work?
1| Performance Tracking
[Data analytics solutions](https://www.sganalytics.com/data-management-analytics/) can provide practical insights into worker performance and productivity in remote settings. They help study core metrics to examine progress or calculate time spent on activities to adjust priorities. Besides, you can use a human resource management system (HRMS) to assist the organization in identifying remote work risks.
Therefore, the discovered data patterns are vital to optimizing workflows. This data-driven approach allows managers overseeing remote workers to make objective resource allocation and workload distribution decisions. Furthermore, quarterly and annual performance evaluation insights can guide managers on ideas to improve efficiency and output.
2| Employee Satisfaction
Happy employees are precious to growth-poised enterprises. They voluntarily accept new responsibilities and put in extra effort for business objectives. Simultaneously, they are more likely to cooperate, transfer skills, and suggest groundbreaking ideas.
However, the remote work model makes ensuring employee engagement, satisfaction, and cooperativeness more challenging. After all, there are almost non-existent mechanisms for employees to understand each other through physical cues.
So, leaders can benefit from workforce [data solutions](https://www.sganalytics.com/data-solutions/), research, innovation, and feedback surveys in developing new team-building exercises based on virtual reality (VR), gaming, and net-enabled conferencing. Furthermore, you can conduct studies about employee engagement and satisfaction using anonymized data to find ideas for hybrid workplace improvements.
Besides, it is crucial for employees to feel valued and integral to the team, whether they are in the office or at a remote location. Therefore, equipping them with adequate tools and stable connectivity is a good practice that reassures them of the importance of seamless collaborations. You can utilize analytics to evaluate the ease of communication and tech-related downtime to prevent team coordination issues early on, further emphasizing their role in the team's success.
3| Recruitment Planning
Restructuring teams to fulfill new projects’ requirements without hurting the progress of an ongoing deliverable is an overwhelming puzzle. At the same time, the estimation of the workforce and tools for efficient project management has changed due to the rise of novel technologies.
You want recruitment analytics and predictive data insights to decide the ratio between on-site and remote work roles. Later, your talent acquisition teams can promote job descriptions based on the insights. Additionally, you can leverage performance analytics to assess newly recruited workers’ eligibility for a permanent position.
What Are the Tools for Remote Work Management and Analytics?
HiBob assists in strategic hiring, workplace culture, recruitment automation, and pay transparency. It also has a 4.5-star rating on G2 based on 765 working professionals’ reviews.
Humanforce acquired IntelliHR in June 2023. It facilitates onboarding automation and has analytics features for employee engagement and performance management.
Qualtrics maintains three components of employee experience management (XM). The first offers insights into engagement goals. The second describes events across an enterprise's employee lifecycle. Finally, the last generates decision recommendations for team improvements.
Conclusion
Data analysts specializing in human resources and productivity insights must upgrade their skills to meet the unique needs of hybrid workplaces. Remote work is here to stay because it has proven that specific job profiles are immune to workplace changes. Simultaneously, this era of eliminating wasteful resource usage and promoting work-life balance dictates younger professionals’ job expectations. No wonder the WFH culture attracts them.
Still, failing to track employee performance will increase the risks of workers misusing remote work privileges. Also, some remote workers might feel alienated due to communication hurdles or bias during recruitment based on work location preferences. Organizations must ensure that never happens.
Global companies have recognized the pivotal role of HRMS and data analytics in remote work management. These tools are not just aids but essential components. After all, they enable companies to hire and retain top talent without witnessing productivity losses.
Understandably, data analysts’ expertise in workforce analytics tools like Oracle Analytics, Humanforce, Qualtrics, Crunchr, and HiBob is highly valued. Their knowledge will be instrumental in studying the effectiveness of the remote work model without hassle. | sganalytics |
1,867,359 | Entity ve DTO | Java'da "entity" ve "DTO (Data Transfer Object)" terimleri genellikle yazılım uygulamalarında veri... | 0 | 2024-05-28T08:21:30 | https://dev.to/mustafacam/entity-ve-dto-9g2 | Java'da "entity" ve "DTO (Data Transfer Object)" terimleri genellikle yazılım uygulamalarında veri yönetimi ve iletişimi için kullanılır.
1. **Entity (Varlık)**:
- Bir veritabanı tablosunu veya veri modellemesini temsil eden bir Java sınıfıdır.
- Veritabanında bir kaydı veya veri parçasını temsil eder.
- Örnek olarak, bir müşteri veritabanı tablosunu temsil eden bir "Customer" sınıfı bir entity olabilir.
- Genellikle veritabanı işlemleri için kullanılır, dolayısıyla veritabanı işlemleri doğrudan bu nesneler üzerinden yapılır.
Örnek bir entity sınıfı:
```java
public class Customer {
private Long id;
private String name;
private String email;
// Getters ve setters
}
```
2. **DTO (Data Transfer Object)**:
- Veri aktarımı amacıyla kullanılan bir nesne veya sınıftır.
- İki farklı sistem veya bileşen arasında veri transferi için kullanılır.
- Entity sınıflarının veritabanı tablosu yapılarından farklı olabilecek bir formatta verileri taşıyabilir.
- Genellikle web servisleri gibi dışarıya açılan API'lerde veya farklı mikro servisler arasında veri taşıma amacıyla kullanılır.
Örnek bir DTO sınıfı:
```java
public class CustomerDTO {
private String name;
private String email;
// Getters ve setters
}
```
Entity ve DTO sınıfları bazen birbirine benzer özelliklere sahip olabilir, ancak kullanım amaçları farklıdır. Entity sınıfları veritabanı yapılarını temsil ederken, DTO'lar genellikle veri aktarımı veya iletişim amacıyla kullanılır ve veri transferi sırasında belirli bir işlevi yerine getirir. | mustafacam | |
1,867,358 | Full Stack Development: From Launchpad to Mastery - A Beginner's Guide to Advanced Strategies | Innovation with full-stack development has been an addictive experience for developers and customers.... | 0 | 2024-05-28T08:21:06 | https://dev.to/wings-tech/full-stack-development-from-launchpad-to-mastery-a-beginners-guide-to-advanced-strategies-18nj | fullstack, webdev, beginners, tutorial | Innovation with full-stack development has been an addictive experience for developers and customers. Developers can seamlessly translate creative visions into functional and user-centric digital mirrors. Today businesses demand agility and scalability in their tech platforms, and full-stack development is the way to deliver. [Full stack development](https://www.wingstechsolutions.com/blog/featuring-everything-about-full-stack-development/) is a comprehensive toolkit for streamlining workflows to enhance user experiences – becoming a lightning-fast method for all modern enterprises.
Full-stack development translates to intuitive interfaces and fast performances for customers. At the same time, it demands functionality knowledge and creative technical know-how from full-stack developers. This guide answers some of the most basic points about full-stack development as a career. Keep on reading!
## Understanding Full Stack Development
The textbook definition of full stack development goes something like this: It involves skills in three areas,
1. Front-end development
2. Back-end development
3. Database management
Front-end development is the creation of visual elements plus the user experience of a website or an application. Developers must work with HTML as the basic structural foundation, CSS as the stylistic layer, and JavaScript – the dynamic engine powering interactivity.
Backend development focuses on the server-side logic more. It drives the functionality of web applications. Developers have to have in-depth knowledge of Node.js, Python, or Ruby. Server architecture methods like RESTful API design and user authentication fall under this umbrella.
Database management acts as the backbone of any data-driven application. It involves the storage, retrieval, and manipulation of data. Developers can work with databases like MySQL, MongoDB, or PostgreSQL. This includes mastering CRUD operations (Create, Read, Update, Delete) and more with optimization techniques and scaling strategies.
These components are condiments; developers must learn their usage ratio and taste like a chef. After all, being proficient in these components is what leads to a masterful web application in today’s era.
## Setting Up Your Development Environment
Before diving into coding, it is important to establish a conducive development environment. Some of the steps to set up a development environment are:
### Choosing the right development tools
Choosing the appropriate development tools for a project is essential. Text editors, integrated development environments (IDEs) and other software are necessary to support your workflow.
### Setting up IDEs
You chose the IDE. But configuring it for optimal productivity and customizing preferences, installing plugins and setting up the project environment, for seamless project execution – is an important step.
### Configuring version control systems
Implementing version control – with GitHub or GitLab helps you track changes, collaborate with your team, and manage the code repositories. But configuring them into your development process is your call.
### Understanding package managers
Package managers are an integral part of the process as they clear your path for installing package dependencies. Some good examples are NPM for Node.js projects or pip for Python projects. These package managers make updating and managing project dependencies very easy.
## Mastering Front-End Development
Front-end development is where the user interacts with your application, making it a critical aspect of full-stack development. Here's what you need to know:
### Understanding HTML fundamentals and best practices
The semantics of HTML elements, latest standards, and best practices for accessibility and SEO matter for an overall seamless full-stack development experience.
### CSS essentials for styling and layout
Some principles of CSS like selectors, specificity, box model, and modern layout techniques like Flexbox and Grid are important for styling options.
### JavaScript basics and advanced concepts
Mastering the fundamentals of JavaScript like variables, functions, loops, and conditionals is important along with advanced topics such as asynchronous programming, closures, and ES6 features.
### Introduction to popular front-end frameworks
Experimenting and understanding popular frameworks such as React, Vue.js or Angular is necessary for learning their architecture, components, and stage management patterns.
## Delving into Back-End Development
Front-end development brushes up the client-side experience & backend development powers the server-side logic of web applications. Here’s what you should focus on for Back-end development:
### Introduction to server-side programming languages
As a full-stack developer, it is vital to know which language to choose for your project. Languages such as Node.js, Python, Laravel, or Ruby are in trend now and it would help you a lot to understand its syntax, features, and ecosystem.
### Understanding server architecture
HTTP Protocol, request handling, middleware, and server deployment strategies should be familiar to you as the back of your hand.
### Building RESTful APIs
RESTful APIs – their designing process and implementation are crucial in facilitating communication between client-side and server-side components of your web application.
### Handling authentication and authorization
Implementing secure authentication and authorization mechanisms is a big step towards data security. Techniques such as JSON Web Tokens and OAuth are some examples here.
## Database Management
Databases are the foundation for storing and retrieving data in the web apps you develop. These are some of the points you should consider for understanding database management to the core.
### Introduction to databases
The differences between SQL & NoSQL databases – their strengths, weaknesses, and use cases are your first step on the database ladder.
### Setting up and managing databases
Installing and configuring databases, creating databases, tables, indexes, and managing user permissions. Some examples are MySQL, MongoDB, and PostgreSQL.
### CRUD operations and database interactions
CRUD operations performance according to database records using SQL queries or NoSQL methods.
### Database optimization and scaling strategies
Database performance optimization with indexing, query optimization, and caching. You should also be familiar with scaling databases to handle increasing loads.
## Implementing Advanced Strategies
There are a few advanced strategies through which your application development process can be enhanced.
### Microservices architecture
Applications can be decomposed into smaller services – for independent development, deployment, and scaling.
### Containerization with Docker
Using docker containers for packaging applications and their dependencies into lightweight, portable units is a smart move. The applications can then run consistently across different environments.
### Deployment strategies
CI/CD pipelines can be implemented to automate the process of building, testing, and deploying applications. This ensures fast and reliable releases.
### Monitoring and debugging techniques
We can utilize tools and practices to monitor the app’s performance, analyze issues, and troubleshoot errors. Some of the methods used in production environments are logging, metrics, and tracing.
**Wrapping up with Emphasis on Practical Exercises and Hands-on Application**
Theory might be all, but practical application solidifies learning like nothing else. Real-world skills like building a simple CRUD application, a full-stack project from scratch, or solving real-world scenarios through coding exercises are necessary for you to become a full-stack developer. There is no one-size-fits-all method in full-stack development, but full-stack development skills can be developed with consistent efforts and networking with fellow full-stack developers!
| wings-tech |
1,867,146 | Today's Oops 20240528 | Though I joined dev.to to find more fellow developers and have fun discussing this and that, I found... | 0 | 2024-05-28T03:29:29 | https://dev.to/teminian/laugh-at-me-20240528-mlp | cpp, help | Though I joined dev.to to find more fellow developers and have fun discussing this and that, I found out there are seldom something from me to actively join the communication. Yet, I think it might giggle someone if I push the "self-destruction" button myself by sharing my mistake during coding.
dev.to에 가입한 뒤로 커뮤니티에서 이런저런 활동을 하길 희망했지만, 생각해보니 저 자신은 뭔가 이런저런 소재를 던져본 적이 없더군요. 그러던 어느날, 제가 코딩 중 일상적으로 경험한 실수를 가지고 자폭개그 같은걸 하면 어떨까...... 하는 생각이 들었습니다.
So let me drop the first bomb.
자 그럼 첫번째 갑니다.
Now, find what's wrong with the code above. :D
(it doesn't compile at all.)
위 코드에 뭐가 잘못되었는지 찾아보세요. :D
(저거, 실행 안됩니다.)
P.S:
dev.to moderation team added #help tag on this article...... Unfortunately, this is to share occasional mistakes I experienced during coding, which I already know why it's an "oops". Thanks for adding the tag, but that's not needed, team!
dev.to 운영팀에서 이 글에 #help 태그를 추가했더군요. 유감스럽지만 이 글은 제가 코딩하면서 경험한 실수에 대한 글이고, 왜 그런 일이 발생했는지를 이미 알고 있는 터라 도움은 필요하지 않습니다(......). 열심히 일해주셔서 감사합니다만, 이번에는 번지수를 잘못 찾으신 것 같아요! | teminian |
1,867,357 | LLM Multi-Machine Training Solutions | Scaling LLMs with Distributed Training To maximize the resource utilization and reduce... | 0 | 2024-05-28T08:21:00 | https://dev.to/mrugank/multi-machine-training-solutions-38pp | llm, largelanguagemodel | ## Scaling LLMs with Distributed Training
To maximize the resource utilization and reduce the training cost, practitioners use distributed computing techniques for multi-GPU or multi-machine training. This techniques are named as **distributed data parallelism** and **distributed model parallelism**.This methods help in efficient use of resources. They also support in horizontal scaling, fault tolerance and parallel processing.
## Applying Data Parallelism Techniques
Data parallelism is used when data does not fit in a single device or lets say a GPU. With data parallelism, dataset is shared across multiple devices which contain the copy of model.In beggining, a mini-batch of dataset is distributed equally in exclusive manner across all model copies. Then this copies are trained in parallel and model parameters are coordinated across all devices. Collective algorithms and high performance computing networking frameworks are used to perform parameter synchronization.
Approaches of Data Parallelism are as follows:-
### 1.AllReduce
The AllReduce approach counts on direct communication between devices to interactively exchange model gradients and parameters. This approach aggregates the data from all devices and redistributes the aggregted results back to them.
### 2.Parameter-Server
Local model copies are synchronized by using publisher between set of parameter servers. This servers hold the most up-to-date copy of model. If not, then they participate in weight averaging step.It can be performed at the end of each training step(synchronous). Also unsychronously, where model copies pull parameters and push gradients independently. To improve the performance of parameter-server approach, HPC infrastructure components are used.
---
## Applying Model Parallelism Techniques
When the neural network is too big to fit in a single device or say a GPU, Model parallelism is an ideal solution. It also makes training process less memory intensive. In model parallelism, the model is partitioned across multiple devices to effectively utilize the combined memory of training cluster.It stores the entire model in memory-efficient fashion.
Common approaches in model Parallelism are as follows:-
### 1.pipeline parallelism
It partitions set of model layers across several devices and divided the mini-batch training into micro-batches. This micro-batches are scheduled in an artificial pipeline for forward and backward calculations in overlap manner. It reduces device inactive time.
### 2.Tensor parallelism
In pipeline parallelism, it partitions the set of weights. But in this case, it splits the indivisual weights across multiple devices.Tensor Parallelism in required in the case where a single parameter consumes most of the GPU memory. Big models like GPT need to be divided and run on many devices at same time to handle all calculations.
---
In AWS, Amazon sagemaker offers data and model parallelism libraries. Some other are DeepSpeed by Microsoft, Megatron-LM by NVIDIA.
**Thank You**
| mrugank |
1,867,356 | Best Affordable Stand and Booth Builder UAE | In the vibrant and competitive world of trade shows and exhibitions, a well-designed stand or booth... | 0 | 2024-05-28T08:20:26 | https://dev.to/nerveexhibitionboothbuild/best-affordable-stand-and-booth-builder-uae-2kig | bootbuilder | In the vibrant and competitive world of trade shows and exhibitions, a well-designed stand or booth can be the game-changer that sets your brand apart. For businesses in the UAE, finding an [affordable stand and booth builder](https://nerve-exhibitionboothbuild.com/stand-and-booth-builder/) is crucial to creating a memorable and impactful event presence without breaking the bank. This article delves into the key aspects of stand and booth building, the benefits of professional services, and tips for selecting the right builder to ensure your event success.
## The Importance of Stand and Booth Design
Stands and booths are more than just physical spaces; they are immersive environments that convey your brand's message and values. A thoughtfully designed booth attracts visitors, engages potential customers, and leaves a lasting impression. Here are the key components that contribute to a successful stand or booth:
Visual Appeal: Eye-catching designs that draw attention and reflect your brand’s aesthetic.
Functionality: Practical layouts that facilitate easy movement and interaction.
Durability: High-quality materials that withstand the rigors of event environments.
Branding: Clear and consistent branding elements that enhance brand recognition.
Benefits of Hiring a Professional Stand and Booth Builder
Engaging a professional stand and booth builder offers numerous advantages, ensuring your booth not only looks great but also performs effectively.
Professional Appearance: Expert builders create visually stunning and high-quality structures that embody your brand’s image and values.
Efficiency and Time-saving: Professionals manage the entire process, from initial design to final construction, allowing you to focus on other event preparations.
Customization: Builders offer tailored designs that cater to your specific needs and goals, ensuring your booth stands out.
Technical Expertise: Skilled builders have the knowledge and experience to integrate advanced technologies and features seamlessly.
Steps in the Stand and Booth Building Process
A successful stand or booth is the result of careful planning and execution. Here’s an overview of the typical process:
Initial Consultation: Discuss your requirements, objectives, and budget with the builder.
Design Phase: Develop detailed concepts and layouts that align with your brand identity and event goals.
Material Selection: Choose the right materials for durability and aesthetic appeal, ranging from wood and metal to fabric and glass.
Construction and Assembly: Build and assemble the booth, ensuring all components fit together seamlessly.
Final Touches: Add branding elements and interactive features to enhance visitor engagement.
Choosing the Right Stand and Booth Builder
Selecting the right builder is crucial for achieving the desired outcome. Here are some tips to guide your decision:
Experience and Portfolio: Review the builder’s past projects to ensure they have the expertise and creativity needed for your booth.
Cost and Budget: Get quotes from multiple builders and compare them to find the best value for your money without compromising on quality.
Customer Reviews and Testimonials: Read feedback from previous clients to gauge the builder’s reliability and work quality.
Future Trends in Stand and Booth Building
The stand and booth building industry is constantly evolving, with new trends shaping the way businesses present themselves at events. Here are some emerging trends to consider:
Sustainability: Eco-friendly designs and materials are becoming increasingly important as businesses strive to reduce their environmental footprint.
Technology Integration: Incorporating technologies like augmented reality (AR) and virtual reality (VR) can create immersive experiences that captivate visitors.
Modular and Reusable Designs: These designs offer flexibility and cost savings, making them ideal for businesses that participate in multiple events.
Conclusion
Investing in a professionally designed stand or booth can significantly enhance your brand’s presence at trade shows and exhibitions. By choosing an affordable stand and booth builder in the UAE, you can achieve a perfect balance between cost and quality, ensuring your booth not only attracts attention but also delivers a memorable experience. With careful planning and the right partner, your next event could be your most successful yet.
| nerveexhibitionboothbuild |
1,867,350 | Java: enums and type safety | Using an enum is much better than using a bunch of constants because it provides type-safe... | 0 | 2024-05-28T08:18:48 | https://dev.to/geniot/java-enums-and-type-safety-5cp8 | > Using an enum is much better than using a bunch of constants because it provides type-safe checking. With numeric or String constants, you can pass an invalid value and not find out until runtime. With enums, it is impossible to create an invalid enum value without introducing a compiler error.
This is only true if it's Java talking to Java. But in modern ecosystems most likely it's a Java microservice that parses incoming JSON with some Jackson library. And then when it comes to persistence you are back to fighting enums again that cannot easily get mapped to PostgreSQL fields. | geniot | |
1,867,349 | Describe testing techniques with proper examples | 1. Boundary Value Analysis: Definition: Boundary Value Analysis (BVA) is a software testing... | 0 | 2024-05-28T08:17:05 | https://dev.to/nandhini_manikandan_/describe-testing-techniques-with-proper-examples-2la7 |
<u> 1. Boundary Value Analysis:</u>
**Definition**: Boundary Value Analysis (BVA) is a software testing technique used to identify errors at the boundaries of input domains. It focuses on testing values at the edges of input ranges.
**Example**: Consider a system that accepts input values between 1 and 100. In boundary value analysis, we test the following:
- Input values just below the lower boundary (1).
- Input values at the lower boundary (1).
- Input values within the valid range (2 to 99).
- Input values at the upper boundary (100).
- Input values just above the upper boundary (101).
By testing these boundary conditions, we increase the likelihood of uncovering potential issues such as off-by-one errors or boundary-related bugs.
<u> 2. Decision Table Testing:</u>
**Definition**: Decision Table Testing is a black-box testing technique used to test systems with complex business logic. It involves creating a table that lists all possible inputs and their corresponding outputs based on the rules of the system.
**Example**: Let's consider a banking application that determines whether a customer is eligible for a loan based on their credit score and income level. We can create a decision table like this:
| Credit Score | Income Level | Eligibility |
|--------------|--------------|-------------|
| Low | Low | Not eligible|
| Low | High | Not eligible|
| High | Low | Not eligible|
| High | High | Eligible |
Here, the decision table covers all possible combinations of credit scores and income levels, and their corresponding eligibility outcomes. Test cases are derived from this table to ensure that the system behaves correctly under various scenarios.
<u>3. Use Case Testing:</u>
**Definition**: Use Case Testing is a functional testing technique that validates the system's behavior against its specified requirements. It involves identifying and executing test cases based on the various interactions users have with the system.
**Example**: Let's consider an e-commerce platform. One of the primary use cases is the process of placing an order. Use case testing for this scenario would involve:
- Testing the successful placement of an order.
- Testing the placement of an order with invalid payment information.
- Testing the placement of an order with out-of-stock items.
- Testing the cancellation of an order before it's shipped.
- Testing the modification of an order after it's placed.
By testing these use cases, we ensure that the system functions correctly and meets user expectations in real-world scenarios.
<u>4. LCSAJ Testing:</u>
**Definition**: LCSAJ (Linear Code Sequence and Jump) Testing is a white-box testing technique used to ensure that every linear sequence of code is executed at least once during testing. It aims to achieve thorough coverage of code paths.
**Example**: Consider a function that calculates the factorial of a number. A typical implementation might use a loop to iterate through the numbers and multiply them together. LCSAJ testing for this function would involve ensuring that every line of code within the loop is executed at least once during testing.
```python
def factorial(n):
result = 1
for i in range(1, n+1):
result *= i
return result
```
In this example, we would design test cases to ensure that the loop is executed with different values of 'n', covering scenarios such as positive integers, zero, and negative integers.
By employing LCSAJ testing, we aim to achieve comprehensive coverage of code execution paths, increasing confidence in the correctness of the software.
In conclusion, these testing techniques, including Boundary Value Analysis, Decision Table Testing, Use Case Testing, and LCSAJ Testing, play crucial roles in ensuring the quality and reliability of software systems by systematically identifying and addressing potential issues. | nandhini_manikandan_ | |
1,867,347 | Auto Generate Open Graph Images With Laravel | Laravel is a popular PHP framework that makes it easy to build web applications. In this article, we... | 0 | 2024-05-28T08:15:20 | https://paulund.co.uk/auto-generate-open-graph-images-laravel | laravel, php, webdev, beginners | Laravel is a popular PHP framework that makes it easy to build web applications. In this article, we will look at how to auto-generate Open Graph images with Laravel.
For this functionality we're going to generate the image in the background, cache this image in the local storage and then serve this image to the user. This way we can generate the image once and then serve it to the user without having to generate it every time.
In order to do this we're going to use the package `spatie/browsershot` that will use the headless browser to generate the image. This will allow us to create a route that the headless browser to use to store the output as a image.
## Install Browsershot
The first thing you need to do is install the `spatie/browsershot` package. This package is a utility for generating images using a headless browser. You can install it using composer.
```bash
composer require spatie/browsershot
```
## Create The Route For The Image
Once you have installed the `spatie/browsershot` package, you can create a new route that will generate the Open Graph image. This route will use the `browsershot` package to generate the image and store it in the local storage.
Here is an example of how you can create a route that generates an Open Graph image:
```php
Route::get('/og-image', OgImageController::class);
```
In this example, we are creating a new route that will use the `OgImageController` to generate the Open Graph image.
## Create The Controller
There's a few steps for this controller so we're going to break it down into a few steps.
First we need to create the controller with the invoke method that will generate the image.
```php
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
class OgImageController extends Controller
{
public function __invoke(Request $request)
{
}
}
```
We're going to pass in a querystring into the route that we'll use as the title in the generated image. This will make the route look like this:
```bash
/og-image?title=Hello%20World
```
In the controller we need to access this querystring to use as the text in the image we do this by using the `$request` object.
```php
$request->validate([
'title' => 'required|string',
]);
$title = $request->get('title');
```
## Generate The HTML From Blade
We need to get the HTML from the blade file as we're going to pass this into the browsershot package, we don't want to return the HTML in the controller but we need render the HTML.
```php
$html = view('ogimage', [
'title' => $title,
])->render();
```
Create the blade file in the resources/views directory called `ogimage.blade.php` with the following content:
```html
<!DOCTYPE html>
<html lang="en">
<head>
@vite('resources/js/app.js')
</head>
<body>
<div class="border-2 border-gray-800 w-[1200px] h-[630px] bg-gray-900">
<div class="flex flex-col items-center justify-center h-full w-full bg-cover bg-center bg-no-repeat">
<h1 class="font-bold text-4xl text-white">{{ $title }}</h1>
</div>
</div>
</body>
</html>
```
Notice the `@vite` directive this is a custom directive that will include the Vite assets in the blade file. You will need to either use your main CSS file or in this case we're using Javascript to import the CSS. Use the one that fits your application.
## Generate The Image
Back in the controller we can now generate the image using the `browsershot` package. We're going to use the `browsershot` package to generate the image and store it in the local storage.
```php
$slugTitle = Str::slug($title);
$browsershot = Browsershot::html($html)
->noSandbox()
->showBackground()
->windowSize(1200, 630)
->setScreenshotType('png');
if (config('ogimage.node_path')) {
$browsershot->setNodeBinary(config('chrome.node_path'));
}
if (config('ogimage.npm_path')) {
$browsershot->setNpmBinary(config('chrome.npm_path'));
}
$image = $browsershot->screenshot();
// Store image locally
Storage::disk('local')->put('public/og-images/' . $slugTitle . '.png', $image);
```
In this example, we take the generated HTML and pass it into the Browsershot package. We set the window size to `1200x630` pixels and set the screenshot type to PNG. We then store the image in the local storage.
## Serve The Image
Now that we have generated the image and stored it in the local storage, we can serve this image to the user. We can do this by returning the image from the controller.
```
return response($image, 200, [
'Content-Type' => 'image/png',
]);
```
## Checking For Existing Image
The above code will generate the image everytime and store it in the local storage, but we don't need to generate the image everytime. We can check if the image exists and if it does we can return the image from the local storage.
```php
if (Storage::disk('local')->exists('public/og-images/'.$slugTitle.'.png')) {
return response(Storage::disk('local')->get('public/og-images/'.$slugTitle.'.png'), 200, [
'Content-Type' => 'image/png',
]);
}
```
We can put this code at the top of the controller and if the image exists we can return the image from the local storage.
## Full Controller Code
Below is the full code used in the controller that you can use to generate the ogimage
```php
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use Illuminate\Routing\Controller;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;
use Spatie\Browsershot\Browsershot;
class OgImageController extends Controller
{
public function __invoke(Request $request)
{
$request->validate([
'title' => 'required|string',
]);
$title = $request->get('title');
$slugTitle = Str::slug($title);
if ($this->hasImage($slugTitle)) {
return response($this->getImage($slugTitle), 200, [
'Content-Type' => 'image/png',
]);
}
$html = view('ogimage', [
'title' => $title,
])->render();
$browsershot = Browsershot::html($html)
->noSandbox()
->showBackground()
->windowSize(1200, 630)
->setScreenshotType('png');
if (config('chrome.node_path')) {
$browsershot->setNodeBinary(config('chrome.node_path'));
}
if (config('chrome.npm_path')) {
$browsershot->setNpmBinary(config('chrome.npm_path'));
}
$image = $browsershot->screenshot();
$this->saveImage($slugTitle, $image);
return response($image, 200, [
'Content-Type' => 'image/png',
]);
}
private function getFilePath($slugTitle)
{
return 'public/og-images/'.$slugTitle.'.png';
}
private function hasImage($slugTitle)
{
return Storage::disk('local')->exists($this->getFilePath($slugTitle));
}
private function getImage($slugTitle)
{
return Storage::disk('local')->get($this->getFilePath($slugTitle));
}
private function saveImage($slugTitle, $image)
{
Storage::disk('local')->put($this->getFilePath($slugTitle), $image);
}
}
```
## Add Meta Tags To Your Site
In order to use this image when posting to social media we need to add the Open Graph meta tags to the site. This will tell the social media platform to use the image we generated.
```html
<meta property="og:title" content="Hello World">
<meta property="og:image" content="/og-image?title=Hello%20World">
<meta property="og:image:width" content="1200">
<meta property="og:image:height" content="630">
```
In this example, we are setting the title of the post to "Hello World" and the image to the route we created earlier.
## Conclusion
In this article, we looked at how to auto-generate Open Graph images with Laravel. We used the `spatie/browsershot` package to generate the image and store it in the local storage. This allows us to generate the image once and then serve it to the user without having to generate it every time.
This functionality can be useful for generating Open Graph images for blog posts, social media posts, and other content that requires an image. | paulund |
1,867,346 | Tips to Select Top-notched software development company in 2024 | In the technical world of 2024, it is essential to have the best software solution that helps you... | 0 | 2024-05-28T08:15:13 | https://dev.to/olivia1202/tips-to-select-top-notched-software-development-company-in-2024-3i9e | softwaredevelopment, softwaredevelopmentcompany, software, developmentcompany | In the technical world of 2024, it is essential to have the best software solution that helps you leverage the power of advanced technologies like AI, ML, IoT, Blockchain, and more. All businesses understand the importance of such software solutions, which is the reason behind the increasing demand for software development companies.
A software development company has the power to make or break your project. That is why selecting the best software development partners is crucial whether you are a startup or a big enterprise. It might sound simple that you will decide and choose a software development company, but it is a difficult task because of the multiple options. There are thousands of software companies in the world that have different kinds of experience and expertise. You have to be very careful while choosing the best [software development company](https://www.bacancytechnology.com/software-development-company) that can provide you with tailored software development services for the success of your dream project.
We don't want you to have trouble selecting a software development company, so in this article, we will discuss some important tips for selecting a top-notch company in 2024. So, let's dive into the topic.
<h2>5 Tips to Select Top-notched software development company in 2024</h2>
These tips will guide you to make the best decisions regarding selecting software development partners in 20224.
<h3>1. Define Your Needs and Project Scope in Detail</h3>
This is a very basic point, but many businesses underestimate it. It is obvious that you should know where you want to go before booking a flight, the same way you should know what you want to build before selecting any software development company. Having a rough idea about the software and having a detailed description of your needs and project scope are different. That is why, before starting the search mission for the best software development company...
**You should have clarity on the following points:**
- What specific objectives do you want to achieve with your software?
- Who will be using your software? What are their needs, technical skills, and expectations?
- How much time do you realistically have for development?
- What is your budget for the project?
- How will you maintain and update your software after launch?
- How will your software scale to accommodate future growth?
We know having this much clarity is difficult, especially for startups. For a better understanding, you can seek [software consulting services](https://www.bacancytechnology.com/software-consulting-services). The expert will help you understand your software's technical requirements and help you decide on a budget for better ROI.
<h3>2. Prioritize Expertise Over Generic Offerings</h3>
There are many software development companies, but many of them do not provide expert services; many just offer basic software development services. In 2024, you have to look beyond these one-size-fits-all approaches. Focus on companies with proven expertise in the specific technologies and methodologies needed for your project. This is a world of new technologies and trends, so always go for a company that is an expert in providing cutting-edge technical solutions.
**Choose a software development company that has the following experties:**
- Expertise to provide tailored solutions according to your needs.
- Experiences and expertise in serving complex projects in different industries
- Expertise in adapting and implementing cutting-edge technologies like AI, ML, Data Science, IoT, and other
- It Should constantly innovate within its area of expertise.
- It should have a wider talent pool within its niche.
<h3>3. Evaluate Communication Style and Cultural Fit</h3>
You must have heard the term "Software Development Partner". That means we are considering a software development company as a partner in the software development process. Then, how can your part have different communication or work ethics? It is essential that your software development company aligns its goals with yours. Additionally, they should have a clear and transparent communication system to avoid any misunderstandings.
**Here are the ways to evaluate the communication and culture fit of any software development company:**
- Ask different questions about their communication style and methods during the Interview.
- Ask about a hypothetical situation that might happen during software development and see their approach.
- Read client reviews about communication and explore the company culture on their website or social media.
- Understand the team structure and inquire about collaboration tools used for information sharing.
<h2>4. Look Beyond Location and Focus on Global Talent Pools</h2>
In this technology-driven world, global boundaries should not restrict the selection of a top-notch software development company. Many reputable software development companies operate remotely or have offices in multiple locations. This allows you to access a wider range of expertise and potentially find more cost-effective solutions. In other countries, you can get top-notch expertise within your budget that you might not have in your location.
**Here are some of the best countries to hire software development companies from in 2024:**
- Ukraine
- India
- Poland
- Argentina
- Romania
- Malaysia
<h3>5. Security and Scalability Considerations</h3>
With the increasing technology, the threat of cybercrime is also increasing. In this case, the security of your software becomes the priority. That's why make sure that you select a development company that prioritizes robust security measures throughout the development lifecycle. Additionally, It is not possible to have a new software to leverage new technologies, here scalability of software becomes essential. That's why you always look for a company's ability to scale your software as your business grows.
**Make sure the company follows all security practices mentioned below:**
- Fully signed NDA
- Secure Coding Practices
- Secure Data Storage and Access Control
- Regular Vulnerability Assessments and Patch Management
- Secure Development Lifecycle
Choosing a top-notch software development company, especially in this competitive market of 2024, is very crucial. You need to take care of minor details, and for that, you must thoroughly evaluate any company. This article aims to make this task a bit easier for you, and I believe these tips will help you select the best software development partner in 2024. If we simplify these tips, firstly identify what you want, then identify who has advanced capabilities to meet your expectations, and never compromise with security.
| olivia1202 |
1,863,657 | What'new in Angular 18 | Introduction Wednesday May 22, 2024, the Angular core team releases a new version of... | 0 | 2024-05-28T08:10:07 | https://dev.to/this-is-angular/whatnew-in-angular-18-60j | angular, news, webdev | ## Introduction
Wednesday May 22, 2024, the Angular core team releases a new version of Angular: version 18.
This version not only stabilizes the latest APIs, but also introduces a number of new features designed to simplify use of the framework and improve the developer experience.
What are these new features? Read on to find out.
## New Control flow syntax is now stable
When the latest version of Angular was released, a new way of managing the flow of a view was introduced. As a reminder, this new control flow is directly integrated into the Angular template compiler, making the following structural directives optional:
- ngIf
- ngFor
- ngSwitch / ngSwitchCase
```html
<!-- old way -->
<div *ngIf="user">{{ user.name }}</div>
<!-- new way -->
@if(user) {
<div>{{ user.name }}</div>
}
```
This new API is now stable, and we recommend using this new syntax.
If you'd like to migrate your application to this new control flow, a schematics is available.
```bash
ng g @angular/core:control-flow
```
Also, the new @for syntax, which replaces the ngFor directive, obliges us to use the track option to optimize the rendering of our lists and avoid their total recreation during a change.
Two new warnings have been added in development mode:
- a warning if the tracking key is duplicated. This warning is raised if the chosen key value is not unique in your collection.
- a warning if the tracking key is the entire item and the choice of this key results in the destruction and recreation of the entire list. This warning will appear if the operation is considered too costly (but the bar is low).
## Defer syntax is now stable
The @defer syntax, also introduced in the latest version of Angular, lets you define a block to be lazyloaded when a condition is met. Of course, any third-party directive, pipe or library used in this block will also be lazyloaded.
Here's an example of its use
```html
@defer(when user.name === 'Angular') {
<app-angular-details />
}@placeholder {
<div>displayed until user.name is not equal to Angular</div>
}@loading(after: 100ms; minimum 1s) {
<app-loader />
}@error {
<app-error />
}
```
As a reminder,
- the @Placeholder block will be displayed as long as the @defer block condition is not met
- the @loading block will be displayed when the browser downloads the content of the @defer block; in our case, the block loading will be displayed if the download takes more than 100ms, and will be displayed for a minimum duration of 1 second.
- the @error block will be displayed if an error occurs while downloading the @defer block
## What will happen to Zone js
Angular 18 introduces a new way of triggering a detection change. Previously, and not surprisingly, the detection change was handled entirely by Zone Js. Now, the detection change is triggered directly by the framework itself.
To make this feasible, a new change detection scheduler has been added to the framework (_ChangeDetectionScheduler_) and this scheduler will be used internally to raise a change detection. This new scheduler is no longer based on Zone Js and is used by default with Angular version 18.
This new scheduler will raise a detection change if
- a template or host listener event is triggered
- a view is attached or deleted
- an async pipe receives a new value
- the markForCheck function is called
- the value of a signal changes etc.
Small culture moment: this detection change is due to the call to the _ApplicationRef.tick_ function internally.
As I mentioned above, since version 18 Angular has been based on this new scheduler, so when you migrate your application, nothing should break in the sense that Angular will potentially be notified of a detection change by Zone Js and/or this new scheduler.
However, to return to the pre-Angular 18 behavior, you can use the provideZoneChangeDetection function with the _ignoreChangesOutsideZone_ setter option set to true.
```ts
bootstrapApplication(AppComponent, {
providers: [
provideZoneChangeDetection({ ignoreChangesOutsideZone: true })
]
});
```
Also, if you wish to rely only on the new scheduler without depending on Zone Js, you can use the _provideExperimentalZonelessChangeDetection_ function.
```ts
bootstrapApplication(AppComponent, {
providers: [
provideExperimentalZonelessChangeDetection()
]
});
```
By implementing the _provideExperimentalZonelessChangeDetection_ function, Angular is no longer dependent on Zone Js, which makes it possible to
- remove the Zone js dependency if none of the project's other dependencies depend on it
- remove zone js from polifills in angular.json file
## Deprecation of HttpClientModule
Since version 14 of Angular and the arrival of standalone components, modules have become optional in Angular, and now it's time to see the first module deprecated: I've named the HttpClientModule
This module was in charge of registering the HttpClient singleton for your entire application, as well as registering interceptors.
This module can easily be replaced by the _provideHttpClient_ function, with options to support XSRF and JSONP.
This function has a twin sister for testing: _provideHttpClientTesting_
```ts
bootstrapApplication(AppComponent, {
providers: [
provideHttpClient()
]
});
```
As usual, the Angular team has provided schematics to help you migrate your application.
When issuing the _ng update @angular/core @angular /cli_ command, a request will be made to migrate the HttpClientModule if used in the application
## ng-content fallback
ng-content is an important feature in Angular, especially when designing generic components.
This tag allows you to project your own content. However, this feature had one major flaw. You couldn't give it a default content.
Since version 18, this is no longer the case. You can have content inside the _<ng-content>_ tag that will be displayed if no content is provided by the developer.
Let's take a button component as an example
```html
<button>
<ng-content select=".icon">
<i aria-hidden="true" class="material-icons">send</i>
</ng-content>
<ng-content></ng-content>
</button>
```
The icon send will be displayed if no element with the icon class is provided when using the button component
## Form Events: a way to group the event of the form
It's a request that was made by the community a long time ago: to have an api to group together the events that can happen in a form; and when I say events, I mean the following events
- pristine
- touched
- status change
- reset
- submit
Version 18 of Angular exposes a new event property from the AbstractControl class (allowing this property to be inherited by FormControl, FormGroup and FormArray), which returns an observable
```typescript
@Component()
export class AppComponent {
login = new FormControl<string | null>(null);
constructor() {
this.login.events.subscribe(event => {
if (event instanceof TouchedChangeEvent) {
console.log(event.touched);
} else if (event instanceof PristineChangeEvent) {
console.log(event.pristine);
} else if (event instanceof StatusChangeEvent) {
console.log(event.status);
} else if (event instanceof ValueChangeEvent) {
console.log(event.value);
} else if (event instanceof FormResetEvent) {
console.log('Reset');
} else if (event instanceof FormSubmitEvent) {
console.log('Submit');
}
})
}
}
```
## Routing: redirect as a function
Before the latest version of Angular, when you wanted to redirect to another path, you used the _redirectTo_ property. This property took as its value only a character string
```typescript
const routes: Routes = [
{ path: '', redirectTo: 'home', pathMath: 'full' },
{ path: 'home', component: HomeComponent }
];
```
It is now possible to pass a function with this property. This function takes _ActivatedRouteSnapshot_ as a parameter, allowing you to retrieve queryParams or params from the url.
Another interesting point is that this function is called in an injection context, making it possible to inject services.
```typescript
const routes: Routes = [
{ path: '', redirectTo: (data: ActivatedRouteSnapshot) => {
const queryParams = data.queryParams
if(querParams.get('mode') === 'legacy') {
const urlTree = router.parseUrl('/home-legacy');
urlTree.queryParams = queryParams;
return urlTree;
}
return '/home';
}, pathMath: 'full' },
{ path: 'home', component: HomeComponent },
{ path: 'home-legacy', component: HomeLegacyComponent }
];
```
## Server Side Rendering: two new awesome feature
Angular 18 introduces two important and much-awaited new server-side rendering features
- event replay
- internationalization
### Replay events
When we create a server-side rendering application, the application is sent back to the browser in html format, displaying a static page that then becomes dynamic thanks to the hydration phenomenon. During this hydration phase, no response to an interaction can be sent, so user interaction is lost until hydration is complete.
Angular is able to record user interactions during this hydration phase and replay them once the application is fully loaded and interactive.
To unlock this feature, still in developer preview, you can use the ServerSideFeature _withReplayEvents_ function.
```typescript
providers: [
provideClientHydration(withReplayEvents())
]
```
### Internationalization
With the release of Angular 16, Angular has changed the way it hydrates a page. Destructive hydration has given way to progressive hydration. However, an important feature was missing at the time: internationalization support. Angular skipped the elements marked i18n.
With this new version, this is no longer the case. Please note that this feature is still in development preview and can be activated using the _withI18nSupport_ function.
```typescript
providers: [
provideClientHydration(withI18nSupport())
]
```
## Internationalization
Angular recommends using the INTL native javascript API for all matters concerning the internationalization of an Angular application.
With this recommendation, the function helpers exposed by the **@angular/common** package have become deprecated. As a result, functions such as getLocaleDateFormat, for example, are no longer recommended.
## A new builder package and deprecation
Up until now, and since the arrival of vite in Angular, the builder used to build the Angular application was in the package: **@angular-devkit/build-angular**
This package contained Vite, Webpack and Esbuild. A package that's far too heavy for applications that in future will use only Vite and Esbuild.
With this potential future in mind, a new package containing only Vite and Esbuild was created under the name **@angular/build**
When migrating to Angular 18, an optional schematic can be run if the application does not rely on webpack (e.g. no Karma-based unit testing). This schematic will modify the angular.json file to use the new package and update the package.json by adding the new package and deleting the old one.
Importantly, the old package can continue to be used, as it provides an alias to the new package.
Angular supports Less Sass Css and PostCss out of the box, by adding the necessary dependencies in your project's node_modules.
However, with the arrival of the new **@angular/build** package, Less and PostCss become optional and must be explicit in the package.json as dev dependencies.
When you migrate to Angular 18, these dependencies will be added automatically if you wish to use the new package.
## No more donwleveling async/await
Zone js does not work with the Javascript feature _async/await_.
In order not to restrict the developer from using this feature, Angular's CLI transforms code using _async/await_ into a "regular" Promise.
This transformation is called downleveling, just as it transforms Es2017 code into Es2015 code.
With the arrival of applications no longer based on Zone Js, even if this remains experimental for the moment, Angular will no longer downlevel if ZoneJs is no longer declared in polyfills.
The application build will therefore be a little faster and a little lighter.
## An new alias: ng dev
From now on, when the _ng dev_ command is run, the application will be launched in development mode.
In reality, the ng dev command is an alias for the _ng serve_ command.
This alias has been created to align with the Vite ecosystem, particularly the npm run dev command.
## Future
Once again, the Angular team has delivered a version full of new features that will undoubtedly greatly enhance the developer experience and show us that Angular's future looks bright.
What can we expect in the future?
Undoubtedly continued improvements in performance and developer experience.
We'll also see the introduction of signal-based forms, signal-based components and, very soon, the ability to declare template variables using the @let block.
| nicoss54 |
1,867,345 | Working Remotely? | Working remotely as a developer has its advantages & disadvantages as well. Though most tech... | 0 | 2024-05-28T08:09:46 | https://dev.to/iamspathan/working-remotely-b54 | Working remotely as a developer has its advantages & disadvantages as well. Though most tech companies prefer working remotely yet they find it equally challenging to engage team members.
This blog outlines some engagement activities for retaining team engagement while maintaining efficiency as well.
https://apyhub.com/blog/engaging-culture-remote-team
Other than the mentioned activities, what other activities would you recommend for your team to follow? Let the community know in the comments :) | iamspathan | |
1,867,343 | JavaScript Hungry Caterpillar Game | Intro: A small game like the famous Nokia snake game. You can pause the game too by pressing the... | 0 | 2024-05-28T08:06:20 | https://dev.to/petrinaropra/javascript-hungry-caterpillar-game-4mmb | javascript, beginners, programming, tutorial | **Intro:** A small game like the famous Nokia snake game. You can pause the game too by pressing the spacebar on the keyboard. So it's a game where the user controls the caterpillar to eat a leaf and in doing so the user gets a point that adds to the score, the higher the score the faster the caterpillar moves. If the user collides with the canvas border the game ends. This is for complete beginners as I have commented on each line of code on what it does. Please let me know if I have made any mistakes. Thanks.
**Watch Demo Here:** [https://youtube.com/shorts/kxzC3YCeSZI?feature=share](https://youtube.com/shorts/kxzC3YCeSZI?feature=share)
**Tweak:** You can change the colors, or change the speed of the caterpillar, or how much score will be increased whenever the caterpillar eats the leaf
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Snake Game</title>
<link rel="stylesheet" href="hungry_snake.css">
</head>
<body>
<div class="game-container">
<h1> Hungry Caterpillar</h1>
<canvas id="gameCanvas"></canvas>
<div id="startScreen">
<h1>Press SPACE to Start</h1>
</div>
</div>
<script src="hungry_caterpillar.js"></script>
</body>
</html>
```
```css
@font-face {
font-family: 'PoetsenOneRegular';
src: url('Fonts/PoetsenOne-Regular.ttf') format('truetype');
font-weight: normal;
font-style: normal;
}
body {
margin: 0;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
}
#game-container{
text-align: center;
}
canvas {
border: 1px solid black;
background-color: lightgreen;
display: block;
}
h1{
font-family: 'Poor Richard Regular', sans-serif;
color: darkgreen;
text-align: center;
}
#startScreen {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
text-align: center;
font-family: Arial, sans-serif;
font-size: 24px;
}
```
```javascript
//a const variable is immutable meaning its va;ue cannot be reassigned
//create a variable called canvas that stores the html canvas
const canvas = document.getElementById('gameCanvas');
//ctx gets a method that returns a 2d drawing context for the canvas
const ctx = canvas.getContext('2d');
//startScreen gets the startScreen div element in the html file
//basically it stores the div with the id-startScreen
const startScreen = document.getElementById('startScreen');
//set the width of the canvas to 600
canvas.width = 600;
//set the height of the canvas to 400
canvas.height = 400;
//creata an array called caterpillar
//this array will be used to creat the body of the caterpillar
let caterpillar = [];
//set the length of the caterpillar
let caterpillarLength = 15;
//set the speed of the caterpillar to 10
let caterpillarSpeed = 10;
//set the score to zero
let score = 0;
//set the state of the game
let gameStarted = false;
//set the caterpillar to move to the right
let dx = caterpillarSpeed;
//set the horizontal movement of the caterpillar to zero
let dy = 0;
//add paused flag
let paused = false
//create function to create the caterpillar
function createCaterpillar() {
//create a loop that loops for as much as the value of caterpillarLength
//so in this case it will loop through 15 times which is the value of caterpilarLength
for (let i = 0; i < caterpillarLength; i++) {
//everytime the loop loops a small circle will be pushed into the caterpillar array
//the x object is the horizontal position of the circle dots and
//the y object is the vertical position of the circle dots
//so basically small circles will be created one after another 15 times and put
//in the caterpillar array so the 3 is the space between each circle
caterpillar.push({ x: canvas.width / 2 - i * 4, y: canvas.height / 2 });
}
}
//an object called leaf is created and its properties are its
//horizontal(x) and vertical(y) position on the canvas
//it just appears at random positions in the canvas
let leaf = {
x: Math.floor(Math.random() * (canvas.width - 30)),
y: Math.floor(Math.random() * (canvas.height - 30))
};
//create a function drawLeaf() to draw the leaf
function drawLeaf() {
//give the leaf a green color
ctx.fillStyle = 'green';
//start drawing the leaf
ctx.beginPath();
// Start point (left center of the leaf)
ctx.moveTo(leaf.x, leaf.y + 10);
//draw top curve of leaf
ctx.bezierCurveTo(leaf.x, leaf.y, leaf.x + 20, leaf.y, leaf.x + 30, leaf.y + 10);
//draw bottom curve of leaf
ctx.bezierCurveTo(leaf.x + 20, leaf.y + 20, leaf.x, leaf.y + 20, leaf.x, leaf.y + 10);
//fill the leaf with hreen
ctx.fill();
}
//create a function drawCaterpillar() to draw the caterpillae
function drawCaterpillar() {
//this creates the head of the caterpillar
//so the caterpillar's head will be black
ctx.fillStyle = 'black';
//begin drawing
ctx.beginPath();
//create the first circle of the caterpillar array
ctx.arc(caterpillar[0].x + 10, caterpillar[0].y + 10, 10, 0, Math.PI * 2);
//make the first circle black
ctx.fill();
//for the rest of the circles they'll be brown
ctx.fillStyle = '#80461B';
//create a loop to loop through the caterpillar array
for (let i = 1; i < caterpillar.length; i++) {
//begin drawing
ctx.beginPath();
//draw the rest of the circles in the caterpillar array
ctx.arc(caterpillar[i].x + 9, caterpillar[i].y + 9, 9, 0, Math.PI * 2);
//all the other circles which is the carterpillar's body will be brown
ctx.fill();
}
}
//create a function called updateCaterpillar()
//this will update the pistion of the caterpillar as it moves
function updateCaterpillar() {
//an object called head is creeted
//the properties of this object positions the head of the caterpillar
const head = { x: caterpillar[0].x + dx, y: caterpillar[0].y + dy };
//put the head object as the first item of the caterpillar array
caterpillar.unshift(head);
//if head's horizontal position is less than the leaf's horizontal position plus 30 and
if (head.x < leaf.x + 30 &&
//if head's horizontal position is plus 20 is more than the leaf's horizontal position and
head.x + 20 > leaf.x &&
//if head's vertical position is less than the leaf's vertical position plus 20 and
head.y < leaf.y + 20 &&
//if head's vertical position plus 20 is less than the leaf's vertical poistion
//basically whenever the caterpillar eats the leaf
head.y + 20 > leaf.y) {
//call the placeLeaf() function to move the leaf to a new location
placeLeaf();
//add 10 to score
score += 10;
//increase the caterpillar's speed by 0.5
caterpillarSpeed += 0.5;
} else {
//remove the last segment of the caterpillar
caterpillar.pop();
}
}
//create a function called placeLeaf()
//this function basically moves the leaf to a new random location
//whenever the caterpillar eats it.
function placeLeaf() {
leaf.x = Math.floor(Math.random() * (canvas.width - 30));
leaf.y = Math.floor(Math.random() * (canvas.height - 20));
}
//create a function called isGameOver()
function isGameOver() {
//create a variable called head that stores the head of the caterpillar
//which is the first circle in the caterpillar array
const head = caterpillar[0];
//Check if the head is outside the canvas boundaries
if (head.x < 0 || head.x >= canvas.width || head.y < 0 || head.y >= canvas.height) {
//If any condition is true, the head is out of bounds, so return true
return true;
}
//create a loop that loops through the caterpillar's body or caterpillar array
for (let i = 1; i < caterpillar.length; i++) {
//Check if head is at the same position as the current segment of the caterpillar
if (head.x === caterpillar[i].x && head.y === caterpillar[i].y) {
//if both the x and y coordinates match, return true to indicate a collision
return true;
}
}
//if there are no collisions return false
return false;
}
//create a function called gameOver()
function gameOver() {
//choose yellow as the fill color
ctx.fillStyle = 'yellow';
//fill the entire canvas with yellow
ctx.fillRect(0, 0, canvas.width, canvas.height);
//choose black as the fill color for the text
ctx.fillStyle = 'black';
//set the font size to 30 pixels and use Arial font
ctx.font = '30px Arial';
//center the text horizontally
ctx.textAlign = 'center';
//draw the text "GAME OVER", canvas.width / 2, canvas.height / 2);
ctx.fillText('GAME OVER!', canvas.width / 2, canvas.height / 2);
}
//create a function called drawScore()
function drawScore() {
//choose black as the fill color
ctx.fillStyle = 'black';
//set the font size to 20 pixels and use Arial font
ctx.font = '20px Arial';
//display the score on the canvas
//set the position of the score at the top right corner of the canvas
//set the font size of the score to 30 pixels
ctx.fillText('Score: ' + score, canvas.width - 100, 30);
}
//create a function called clearCanvas()
function clearCanvas() {
//clear the entire canvas, removing all previously drawn content
ctx.clearRect(0, 0, canvas.width, canvas.height);
}
//create a function called gameLoop()
function gameLoop() {
//if the isGameOver() function returns true
if (isGameOver()) {
//call the gameOver() function
gameOver();
//exit current function
return;
}
//if game is paused stop game
if(paused) return;
//call the clearCanvas() function to clear the canvas
clearCanvas();
//call the drawLeaf() function to draw the leaf
drawLeaf();
//call the updateCaterpillar() function
updateCaterpillar();
//call the drawCaterpillar() function
drawCaterpillar();
//call the drawScore function()
drawScore();
//set a timeout to call requestAnimationFrame with gameLoop after a delay based on caterpillarSpeed
setTimeout(() => {
//request the browser to call gameLoop to update the animation
requestAnimationFrame(gameLoop);
//the request will be carried out after
//1000miliseconds divided by the value of caterpillarSpeed
}, 1000 / caterpillarSpeed);
}
//create a function called startGame
function startGame() {
//if the value of gameStarted is true
//the ! indicates that gameStarted is not false
//which was the initial value of gameStarted
if (!gameStarted) {
//gameStarted is now set to true
gameStarted = true;
//hide the start screen by setting its display style to 'none'
startScreen.style.display = 'none';
//call createCaterpillar() function
createCaterpillar();
//call gameLoop()
gameLoop();
}
}
//create a function called togglePause()
function togglePause() {
//the variable paused is now set to true
paused = !paused;
//if true
if (!paused) {
// Resume the game loop if unpaused
gameLoop();
}
}
//add an event listener for keydown events
document.addEventListener('keydown', event => {
//if the spacebar is pressed
if (event.code === 'Space') {
//if gameStarted is true start game
if(!gameStarted) {
startGame();
//if gameStarted is false
} else {
//call the togglePause() function
//or basically pause game
togglePause();
}
}
if(!paused){
//if the up arrow is pressed and the caterpillar is not moving
//vertically, move up
if (event.code === 'ArrowUp' && dy === 0) {
dx = 0;
dy = -caterpillarSpeed;
}
//if the down arrow is pressed and the caterpillar is not moving vertically,
//move down
if (event.code === 'ArrowDown' && dy === 0) {
dx = 0;
dy = caterpillarSpeed;
}
//if the left arrow is pressed and the caterpillar is not moving horizontally,
//move left
if (event.code === 'ArrowLeft' && dx === 0) {
dx = -caterpillarSpeed;
dy = 0;
}
//if the left arrow is pressed and the caterpillar is not moving horizontally,
//move right
if (event.code === 'ArrowRight' && dx === 0) {
dx = caterpillarSpeed;
dy = 0;
}
}
});
```
| petrinaropra |
1,867,342 | Simplifying and Improving Python Code using itertools.chain() | The itertools module in Python is a set of tools that are designed to be fast and use minimal memory,... | 0 | 2024-05-28T08:04:47 | https://developer-service.blog/simplifying-and-improving-python-code-using-itertools-chain/ | python, programming | The itertools module in Python is a set of tools that are designed to be fast and use minimal memory, which is especially helpful when working with large amounts of data.
One of the most useful tools in this module is itertools.chain(), which allows you to combine multiple iterables (e.g. lists, tuples, etc.) in a highly efficient way, without the need to create new lists.
In this article, we'll take a look at how itertools.chain() works and why it's a great option for making your Python code more efficient and easier to read.
---
## What is itertools.chain()?
itertools.chain() is a function that lets you combine multiple iterables (e.g. lists, sets, or dictionaries) into a single iterable.
This is especially helpful when you need to go through multiple sequences one after the other, without having to merge them into a single large container.
---
## How Does itertools.chain() Work?
The itertools.chain() function takes multiple iterables (e.g. lists, tuples, etc.) as input and returns a single iterator.
This iterator goes through each of the input iterables one at a time, producing (or "yielding") each element until it has gone through all of the elements in all of the input iterables.
Here's a simple example to illustrate how it works:
```
from itertools import chain
# Define three lists
list1 = [1, 2, 3]
list2 = [4, 5, 6]
list3 = [7, 8, 9]
# Using chain to iterate over all lists sequentially
for number in chain(list1, list2, list3):
print(number)
```
Output:
```
1
2
3
4
5
6
7
8
9
```
In this next example, we'll see how itertools.chain() can be used to easily go through a list, a tuple, and a set, without the need for multiple loops or complex code to combine them:
```
from itertools import chain
# Define a list, a tuple, and a set
list_numbers = [1, 2, 3]
tuple_numbers = (4, 5, 6)
set_numbers = {7, 8, 9}
# Using chain to iterate over a list, a tuple, and a set
for number in chain(list_numbers, tuple_numbers, set_numbers):
print(number)
```
Output:
```
1
2
3
4
5
6
8
9
7
```
**Explanation**:
- list_numbers: a list of numbers
- tuple_numbers: a tuple of numbers
- set_numbers: a set of numbers
The itertools.chain() function is able to handle each of these different types of iterables (i.e. lists, tuples, and sets) without any problems.
The output sequence that is produced by the iterator goes through the elements in the order that the iterables are given as input, so it starts with the elements in the list, then the elements in the tuple, and finally the elements in the set.
It's important to note that the order of the elements within the set might be different each time, because sets do not have a specific order.
---
## Benefits of Using itertools.chain()
Itertools.chain() is a useful tool for combining multiple iterables (e.g. lists, tuples, etc.) into a single iterable. It has several benefits that make it a great choice for working with large datasets or for improving the readability of your code.
One of the main advantages of itertools.chain() is that it is memory efficient. Because it does not create a new list, it does not use up any additional memory beyond the original iterables. This makes it an ideal option for working with large datasets, where using a lot of memory can be a concern.
Another benefit of itertools.chain() is that it can improve the readability of your code. By reducing the complexity of nested loops or multiple iterable handling, your code becomes cleaner and easier to understand. This can make it easier for you and for others to work with and maintain your code.
Itertools.chain() is also a flexible tool that can be used with any type of iterable. This makes it a versatile option for a wide range of scenarios, whether you're working with lists, tuples, sets, or other types of iterables.
---
## Conclusion
Itertools.chain() is a useful tool for Python developers who want to make their code more efficient and effective. It allows you to easily combine multiple iterables (e.g. lists, tuples, etc.) into a single iterable, which can be especially helpful when working with large datasets or when you need to go through multiple sequences one after the other.
By understanding how itertools.chain() works and incorporating it into your code, you can make your code more efficient and easier to read. This can be especially beneficial for data analysis, machine learning, and other types of software development where working with large amounts of data is common.
Overall, itertools.chain() is a powerful and versatile tool that can help you improve the quality and efficiency of your Python code.
| devasservice |
1,867,341 | What does MVP Mean and How to Build it? | These days, marketing services crash with realistic scenarios and need to change over within a short... | 0 | 2024-05-28T08:04:05 | https://dev.to/rubengrey/what-does-mvp-mean-and-how-to-build-it-4l5h | flutter, softwaredevelopment, mvp | These days, marketing services crash with realistic scenarios and need to change over within a short time. Everything is going wild, and the number of events is at an extremely high level. To overcome the hassles, MVP development is a must.
Of course, [custom mvp development](https://flutteragency.com/services/mvp-development-company/) is always there to help you get into the monetary fund and be optimistic. Unlike others, MVP development for startups is the best way to overcome marketing hassles. So, it is always better to understand what MVP means and how to build it in detail.
## What is MVP?
A minimum viable product (MVP) is nothing but a simple and ready-to-launch version of a product. Of course, it includes the most essential elements which have defined the value proposition.
To replace it completely, it will handle regular applications to get into the full pledged functionalities and additional features. Hence, MVP startups are similar to getting into the app beta testing, and only the most essential services can be covered more easily.
## For What MVP is Developed?
Of course, MVP is mainly designed and developed to reduce the time spent on market research. Hence, it will easily attract the adopters and achieve product-market fit from the business outcome. The MVP should be easy and have peace of mind in testing the market range and values as well.
MVP software development allows business owners to test their assumptions and learn how the audience reacts to their product features. Hence, it is helpful to maximize the outcomes from the minimum resources accordingly.
Likewise, MVP development for startups is a constant process of updating and identifying user demands and picking the proper product features. They set out a new solution, and software development has to identify the experiment.
Implementing isolated business strategies is to explore new firms to update the development of startups. Getting insights is always the best business to explore possibilities to handle successful results.
## Benefits of MVP Development for Startups
MVP software development has to find massive solutions and have lots of benefits to include. However, it will define the essential benefits and drawbacks to control over startup with development to compare well with integration with new features and resources.
If you have limited resources, you can easily develop an MVP version and handle the development costs within a short time. The development of MVP should be easier and arranged with new unlimited features that meet your desires.
On the other hand, MVP software development should be easy and allow for development from scratch. It should be explored with a new market and want to adapt to deliver services and limited time for development. MVP software development is considered for startup projects. Hence, custom MVP development should make it easy to target great possibilities for your startup project.
Of course, MVP [development for a startup](https://flutteragency.com/advantage-startup-hiring-flutter-developer/) is a smooth process. Hence, it includes the best possible solution to explore the deal and completely handle such an understanding of the requirements.
It ensures overall experience and gives great possible solutions for outsourcing the MVP startup development. Hence, it will be handled completely and will have guidance based on the building as per the market share and targeted audience reactions.
The risks are extremely low as it conveys the MVP development approach, which is stronger as well. For startups, it includes the easiest option to guide potential investors to choose based on the cost-effective options.
## Step-By-Step MVP Software Development
**Step 1: Discovery Phase of Project**
Let the MVP development process begin by discovering the phase of the project. Of course, it should be an easy one and allow you to find out the demands in showing the targeted audience as well. However, it includes better chances and exploring them while keeping an eye on rivals and their products.
They ensure steady results and are adaptive in checking strengths and weaknesses as well. As a result, it should be an easy one and guide you to find empty market niches as well. The MVP development process takes place for only a limited time.
**Step 2: Define the Startup Development Idea**
After the market research, one can specify the offer and fulfill the demand of the targeted audience accordingly. Developers and startup owners have to examine the alternatives for the market audience. So, make a strong decision and hire developers for a startup. You can easily check the compliances which are steady enough and keep up with their plans initially.
**Step 3: Design a Structure of Startup**
UI and UX design principles have to be found behind the app design. Of course, you have to select the most efficient and cost-effective guidance as well.
So, it lets them focus on major functions and features to adapt to user effectiveness forever. It might be useful for setting up ideas and exploring the best way to exhibit with an understanding of the product to scale up with the future benefits.
**Step 4: Confine to the Basics**
Always keep in mind the development stage and tell about the excellent features you can experience in it. The MVP development for a startup has to find out how to add more value and clearly identify the features to explore desired changes. They let you focus on integrating with many user-requested features to adapt to business outcomes. The ultimate process and design campaigns have to set out with the basics.
**Step 5: Launch an MVP Software Development**
[The white-label app development](https://flutteragency.com/why-flutter-future-mobile-app-development/) may be amazing, and we agreed to get into major features and learn about market demands. It should be an easy one and arranged completely with approach one.
Hence, the design process takes place as an important guidance for the final product and meets the demands of the consumer. MVPs for startups have to integrate as per the startup ranges and make use of prototypes to keep track of the objectives clearly as per the appealing and relevant consumers.
**Step 6: Post-Launch Actions**
Finally, you have to get feedback from the clients once you have launched the MVP. Of course, it should be easy to get quick responses and salient roles to be done.
It will help you generate a few more ideas and consumer behavior research accordingly. Thus, it would guide you in handling the crucial learning, measuring, and testing needs. They repeatedly welcome everyone to gather successful solutions for development guidance.
## Conclusion
To conclude, no matter what size of business you are running or setting up, mvp development for startups is available for you. Of course, the strategies and process have to take over the complete solution and create a launch strategy with business insights. However, MVP has launched some businesses like Dropbox, Figma, Uber, and so on. You have to determine the story and explain the way you could make it for business insights and market size. | rubengrey |
1,867,338 | Hard Rock Atlantic City team members receive more than $10 million bonus | Continuing its legacy of paying bonuses to team members, Hard Rock Hotel & Casino Atlantic City... | 0 | 2024-05-28T08:01:20 | https://dev.to/outlook8970/hard-rock-atlantic-city-team-members-receive-more-than-10-million-bonus-4a70 | Continuing its legacy of paying bonuses to team members, Hard Rock Hotel & Casino Atlantic City was encouraged by the news that thousands of union and non-union team members would receive more than $10 million in bonuses. The bonuses were announced at a "town hall" gathering earlier this week, with several team members receiving $100,000 in cash and prizes.
The announcement comes on the heels of news that Hard Rock has once again been recognized by Forbes as one of the top U.S. employers for the seventh year in a row. The commitment to Hard Rock International's team members includes an announcement of a $100 million investment to substantially raise the salaries of the U.S. workforce in 2022, and the pay increases have a huge impact on 95 jobs, including jobs in Atlantic City.
Announcing the bonuses and awarding them, Hard Rock International Chairman Jim Allen was joined by George Goldhoff, the newly appointed president of Hard Rock Hotels & Casino Atlantic City, as well as Hard Rock Atlantic City partners Jack Morris, Joe Jingoli Jr., and Michael Jingoli. Together, they unveiled a combination of capital improvements to create an even greater guest experience at Hard Rock.
The capital improvement is part of a five-year celebration that will bring the largest entertainment lineup in Hard Rock's five-year history through more than $30 million in entertainment investments to attract global show talent at Hard Rock Live at Ites Arena, the market's leading entertainment venue.
Hard Rock Hotels & Casino Atlantic City has announced 2023 performances by Tina Fey, Amy Poerer, Anita Baker, Jack Brown Band, and more, as well as Sting, Keith Urban, Janet Jackson, and Pitbull. Jim Allen and George Goldhoff have promised more top talent entertainment announcements in the coming weeks and months.
However, the main focus of the town hall event was to announce a $10 million bonus and thank the Hard Rock Atlantic City team members for their customer service and casino resort's success. Several frontline team members received up to $20,000 in cash and prize money as compensation for their hard work and real-world results.
"The dedication of our Hard Rock Atlantic City team members to customer satisfaction is unmatched in this market, which is the biggest reason for our success story here in Atlantic City," said Jim Allen, president of Hard Rock International. "We recognize and appreciate their dedication and passion, and we want to encourage them to continue their great work."
Additional town hall highlights focused on Hard Rock's commitment to Atlantic City and community efforts there, along with a Hard Rock brand update highlighting its portfolio of domestic and global hotels, casinos and restaurants.
"The incredible talent base and outstanding service of our team members have been amazing to witness since arriving in Atlantic City," said George Goldhoff, president of Hard Rock Atlantic City. "I'm excited to start this next chapter on a team that has already had great success. Our team members truly embody the motto 'Love everyone - serve everyone' and support our efforts to make a difference in our communities." [바카라사이트 추천](https://www.outlookindia.com/plugin-play/2023년-바카라-사이트-추천-실시간-에볼루션-바카라사이트-순위-top15-news-334941) | outlook8970 | |
1,867,337 | What are Single Page Applications (SPAs)? | Traditional multi-page web applications require a full page reload for each interaction with the... | 0 | 2024-05-28T08:01:13 | https://dev.to/chamikacme/single-page-applications-spas-revolutionizing-web-development-489k | webdev, angular, react, javascript | Traditional multi-page web applications require a full page reload for each interaction with the application. This adversely affects the user experience of the application. Single Page Applications (SPAs) entered the game as a solution for this issue.
Single Page Applications are web applications that load a single HTML page and dynamically update the content as the user interacts with the app without fully reloading the page. This seamless user experience has been achieved with the help of JavaScript.
**Advantages of SPAs**
- Improved performance: Reduced server load and decreased page reload times enhance performance significantly.
- Better user experience: Smooth interactions without page reloads contribute to a better user experience.
- Scalability and maintainability: The modular architecture of SPAs makes them easier to scale and maintain.
**Challenges when using SPAs**
- SEO challenges: SEO web crawlers read HTML easily. When the content is updated with JavaScript, it can be difficult for search engines to index.
- Higher initial load time: The initial page load can take more time due to the large JavaScript bundle at the initial load.
- Browser compatibility: Additional effort is needed to ensure performance across different browsers, especially in older versions.
**Most used frameworks/libraries for building SPAs**
- React: A JavaScript library developed by Facebook, which uses a virtual DOM and manipulates the real DOM efficiently.
- Angular: A JavaScript framework backed by Google, with a wide range of features including two-way data binding.
- Vue.js: A lightweight JavaScript library praised for its simplicity and flexibility.
**Examples of SPAs**
- React: Facebook, Netflix, Airbnb
- Angular: Gmail, Upwork, Forbes
- Vue.js: GitLab, Behance, Wix
**Conclusion**
These SPA frameworks are continuously evolving to overcome these issues with features such as server side rendering. However, SPAs may not be the most suitable for each case. Therefore, consider the requirement of the application when selecting the SPA approach. | chamikacme |
1,838,290 | Scaling Up Your Design System: From Seedling to Flourishing Forest | Design systems are the backbone of efficient and consistent UI/UX across an organization's digital... | 27,353 | 2024-05-28T08:00:00 | https://dev.to/shieldstring/scaling-up-your-design-system-from-seedling-to-flourishing-forest-4l2n | design, learning, ui | Design systems are the backbone of efficient and consistent UI/UX across an organization's digital products. But as your product line expands and your user base grows, scaling your design system effectively becomes paramount. Here's how to cultivate a thriving design system that supports your organization's ambitious goals.
**Building a Strong Foundation:**
* **Start with Clarity:** Clearly define the purpose, scope, and governance of your design system before scaling. This ensures everyone understands its role and how it will evolve.
* **Focus on Core Components:** Prioritize building a robust library of essential UI components that cater to most use cases. This creates a solid foundation for future expansion.
* **Documentation is Key:** Invest in comprehensive and user-friendly documentation. This includes code snippets, usage guidelines, and best practices for developers and designers.
* **Embrace Version Control:** Implement a version control system (like Git) to track changes, maintain a history of iterations, and facilitate collaboration.
**Strategies for Sustainable Growth:**
* **Modular Design:** Break down your design system into smaller, independent modules. This allows for easier updates and customization for specific product needs.
* **Community Building:** Foster a design system community within your organization. Encourage designers and developers to contribute, share feedback, and participate in the system's ongoing development.
* **Embrace Automation:** Leverage automation tools for repetitive tasks like code generation and asset management. This frees up design and development resources for more strategic work.
* **Data-Driven Decisions:** Track usage data to understand how your design system components are being used. This data can inform future improvements and identify areas for optimization.
**Scaling for Different Teams:**
* **Tailored Documentation:** Develop targeted documentation for different audiences (designers, developers, product managers). Focus on providing the most relevant information for each user group.
* **Training and Workshops:** Offer ongoing training and workshops to educate stakeholders on the design system's functionalities, best practices, and how to contribute effectively.
* **Accessibility First:** Ensure your design system prioritizes accessibility from the outset. This ensures your products are usable by everyone, regardless of ability.
**The Future of Scalable Design Systems:**
* **AI-powered Assistance:** Artificial intelligence can be used to automate tasks like design system compliance checks and pattern identification, further streamlining the scaling process.
* **Integration with Design and Development Tools:** Expect deeper integration between design systems and popular design and development tools, fostering a more seamless workflow.
* **Focus on Developer Experience:** As design systems evolve, developer experience (DX) will become increasingly important. Prioritize creating a system that is easy for developers to understand, implement, and maintain.
**Conclusion**
Scaling a design system is an ongoing journey. By following these strategies and embracing a growth mindset, you can cultivate a design system that empowers your teams, ensures brand consistency, and fuels your organization's long-term success. Remember, a well-scaled design system is not a static entity, but a living organism that adapts and grows alongside your products and users.
| shieldstring |
1,837,859 | The problem with “async void” | The problem with using “async” and “void” in programming languages like C# is that it can lead to... | 0 | 2024-05-28T08:00:00 | https://dev.to/ben-witt/the-problem-with-async-void-5f0j | microsoft, coding, dotnet, development | The problem with using “async” and “void” in programming languages like C# is that it can lead to unexpected behavior and difficulties in error handling. Let’s take a closer look at why this is a problem:
We develop a small console application with the following flow:
1.) First, we issue a message (“Start”) on the console.
2.) Then, we start an asynchronous task that waits for one second before issuing the message “Wait one second” on the console.
3.) After the asynchronous task finishes waiting, it returns to the main thread.
4.) The main thread waits until the asynchronous task completes.
5.) Only when the task completes, the “End” message is displayed on the console.
In this way, we ensure that the application responds synchronously to the execution of the asynchronous task and continues only when the task completes.
So far everything is running smoothly. However, I currently have to wait for the background task to complete. Even though it is an asynchronous operation that does not return a result, my program blocks until this task is fully completed.
But what if I wanted to implement a simple “fire & forget” method? What if I didn’t want to wait for the process to complete?
Theoretically, we could simply use the “void” return type in the background task instead of “task” and remove the “await” statement. This way, the method would execute asynchronously without waiting for the result. Would this be possible?
Yes, the compiler would not detect an error, and the application could still be started.
The output would look a little different than it does now, but that is exactly what is intended. We call the method without waiting.
The method should be called and our application should then continue without waiting for it to finish. This has been implemented correctly.
However, care should be taken because there is a danger here.
Let’s take a closer look at the background process:
In our example, not much is done in this phase. However, we should note what would happen if an error occurs inside this or another method or function is called in this method
Let’s add another one to our background task:
In our extension an error occurs after a certain time, e.g. due to an incorrect execution of an operation.
How will our application react in this case?
This application will crash!
Can’t we solve the problem by implementing error handling?
Unfortunately, the problem is not solved by a simple implementation of error handling.
To explain this better, I would like to take a small diagram for help
The error occurs in the subthread without notifying the main thread, which causes the program to terminate.
Overall, you should use “async task” instead of “async void” to avoid the above problems. This allows you to wait for the async task to complete, retrieve results, and handle errors properly, resulting in more reliable and easier-to-maintain code.
However, if it is still necessary to perform a Fire&Forget operation, then use this:
```
…
//fire & forget
Task.Run(()=>{… do something here…});
…
```
**Keep attention**
I have found an approach that is also not the best way to deal with the task.
The problem here is the ForEach loop. Let’s take a look inside this loop.
This is the code from Microsoft: System.Collections.Generic
The param here is an action => method => no return value
his means that we encounter the same problem here as described above.
## Summary:
**Loss of information:** If you declare a method as “async void,” it means that the method executes asynchronous code but does not return a value. This results in you not having access to the result of the method, even if it actually returns a result. It becomes difficult to use the result or pass it to other parts of your code. This can lead to behavior that is difficult to understand, especially when coordinating asynchronous operations.
**Leaving the logical flow:** By using “async void” the application leaves the logical flow of the application at the point where this method is called and is processed uncontrolled. This is because the method with async void does not have a return value that can be monitored.
**Missing return values:** In C# and other programming languages, it is a best practice to declare methods that contain asynchronous code with “async task”. This signals that the method returns a task that allows you to monitor the asynchronous operation and wait for its completion if necessary. The absence of a return value with “async void” results in a limitation of your control over the asynchronous code.
**Lack of error handling:** When an async void method raises an exception, the exception is not caught or handled. This means that errors in the method go unhandled and can potentially crash the entire application process. In an asynchronous task, on the other hand, you can catch exceptions and respond accordingly. | ben-witt |
1,867,336 | Creation of Private Storage for Internal Comapny Document with Restricted Access on Azure . | The company requires secure storage for its offices and departments to ensure that private content is... | 0 | 2024-05-28T07:58:07 | https://dev.to/olaraph/creation-of-private-storage-for-internal-comapny-document-with-restricted-access-on-azure--of0 | The company requires secure storage for its offices and departments to ensure that private content is not shared without consent. This storage must have high availability to withstand regional outages and will also be used for backing up the public website.
Our goals are as follows:
- Create a storage account for the company's private documents.
- Configure redundancy for the storage account.
- Set up a shared access signature to provide partners with restricted access to specific files.
- Back up the public website storage.
- Implement lifecycle management to move content to the cool tier.
Let us Start:
Create a storage account for the internal private company documents.
In the portal, search for and select Storage accounts.
Select + Create.
Select the Resource group created in the previous lab.
Set the Storage account name to private. Add an identifier to the name to ensure the name is unique.
Select Review, and then Create the storage account.
Wait for the storage account to deploy, and then select Go to resource.
This storage requires high availability if there’s a regional outage. Read access in the secondary region is not required. Configure the appropriate level of redundancy.
In the storage account, in the Data management section, select the Redundancy blade.
Ensure Geo-redundant storage (GRS) is selected.
Refresh the page.
Review the primary and secondary location information.
Save your changes.
Create a storage container, upload a file, and restrict access to the file.
Create a private storage container for the corporate data.
In the storage account, in the Data storage section, select the Containers blade.
Select + Container.
Ensure the Name of the container is private.
Ensure the Public access level is Private (no anonymous access).
As you have time, review the Advanced settings, but take the defaults.
Select Create.
For testing, upload a file to the private container. he type of file doesn’t matter. A small image or text file is a good choice. Test to ensure the file isn’t publically accessible.
Select the container.
Select Upload.
Browse to files and select a file.
Upload the file.
Select the uploaded file.
On the Overview tab, copy the URL.
Paste the URL into a new browser tab.
Verify the file doesn’t display and you receive an error.
An external partner requires read and write access to the file for at least the next 24 hours. Configure and test a shared access signature (SAS).
Select your uploaded blob file and move to the Generate SAS tab.
In the Permissions drop-down, ensure the partner has only Read permissions.
Verify the Start and expiry date/time is for the next 24 hours.
Select Generate SAS token and URL.
Copy the Blob SAS URL to a new browser tab.
Verify you can access the file. If you have uploaded an image file it will display in the browser. Other file types will be downloaded.
Configure storage access tiers and content replication.
To save on costs, after 30 days, move blobs from the hot tier to the cool tier.
Return to the storage account.
In the Overview section, notice the Default access tier is set to Hot.
In the Data management section, select the Lifecycle management blade.
Select Add rule.
Set the Rule name to movetocool.
Set the Rule scope to Apply rule to all blobs in the storage account.
Select Next.
Ensure Last modified is selected.
Set More than (days ago) to 30.
In the Then drop-down select Move to cool storage.
As you have time, review other lifecycle options in the drop-down.
Add the rule.
The public website files need to be backed up to another storage account.
In your storage account, create a new container called backup. Use the default values. _Refer back to the container we created earlier if you need detailed instructions._
Navigate to your publicwebsite storage account. This storage account was created in the previous articles
In the Data management section, select the Object replication blade.
Select Create replication rules.
Set the Destination storage account to the private storage account.
Set the Source container to public and the Destination container to backup.
Create the replication rule.
Optionally, as you have time, upload a file to the public container. Return to the private storage account and refresh the backup container. Within a few minutes your public website file will appear in the backup folder.
As seen below:
File uploaded to public container
File backed up seen in backup container
| olaraph | |
1,867,335 | Industrial Juicers: Enhancing Juice Production Capabilities | Industrial Juicers: The Expert in Quality and Safe Juice Production Are you interested in exactly... | 0 | 2024-05-28T07:55:59 | https://dev.to/xjsjw_cmksjee_e594b674d22/industrial-juicers-enhancing-juice-production-capabilities-4508 | production | Industrial Juicers: The Expert in Quality and Safe Juice Production
Are you interested in exactly how markets can easily create big amounts of juice in a brief quantity of time? Look no more compared to industrial juicers! These ingenious devices can easily improve juice production abilities, providing top-quality, safe juices that will certainly please your thirst. Let's get a better take a check out exactly how an industrial juicer can easily transform your juice-making procedure.
Benefits of Industrial Juicers
Industrial Juicing Series deal with several benefits over home juicers. These devices are developed to juice big amounts of fruits and veggies rapidly and effectively, conserving opportunity and enhancing efficiency. Furthermore, industrial juicers essence much a lot of extra juice compared with home juicers, creating greater produce coming from your create. Consequently, industrial juicers offer an affordable service for massive juice production.
Development in Industrial Juicers
Along with the developments in innovation, industrial juicers have been changed right into extremely effective devices that guarantee constant quality and security. These devices are geared up along with cutting-edge functions like security locks, auto-reversing electric motors, and self-cleaning bodies. These functions guarantee that the device provides safe juices at each opportunity while likewise prolonging its life expectancy.
Security of Industrial Juicers
Security is an essential element of any type of market, and industrial juicers are no exception. These devices include safety functions that protect drivers coming from prospective risks. Industrial juicer cutters and various other components are confined to a security protector that avoids mishaps and trauma. Furthermore, massive juicers have included functions like security locks, auto-shutoff, and emergency visits, which implies that the device will certainly be closed down instantly if one thing fails, decreasing the danger of mishaps.
Ways to Utilize Industrial Juicers
Utilizing an Small Fruit Juice Production Line industrial juicer is easy, also if you have no previous expertise. Very initially, you have to prepare your fruits and veggies by cleaning and reducing all of them right into smaller-sized items. After that, feed all of them right into the juicer. Unlike home juicers, industrial juicers can easily juice fruits and veggies, like apples and carrots. Guarantee that you comply with the manufacturer's instructions while establishing your device, and constantly cleanse it correctly after utilization. Constantly describe the handbook for upkeep suggestions and various other directions.
Solution and Quality of Industrial Juicers
When choosing an industrial juicer, it is essential to think about the after-sales solution coming from your provider. The provider ought to offer upkeep, repair work, and substitute solutions quickly and effectively, therefore your equipment is constantly in outstanding functioning problems. The quality of the juicer is important in guaranteeing the finest outcomes for your clients. Industrial juicers created from top-quality products and developed with accuracy are much lot extra resilient and will certainly provide remarkable outcomes.
Application of Industrial Juicers
Industrial Filtering Series juicers have a wide variety of requests in different markets. You can easily utilize all of them towards essence juice coming from any type of fruit or even veggie, whether difficult or even smooth. These devices are perfect for markets that need top-quality juices, consisting of the drink market, friendliness, and farming. They are ideal for companies that have to create large amounts of clean juice rapidly. Furthermore, industrial juicers are ideal for creating smoothies, sorbets, and various other icy deals.
Source: https://www.enkeweijx.com/Juicing-series | xjsjw_cmksjee_e594b674d22 |
1,867,333 | SSL for localhost takes 5 seconds now. | Update on 2024/06/10: Thanks to your great support, it's been downloaded for more than 2,000 times!... | 0 | 2024-05-28T07:54:08 | https://dev.to/cheeselemon/ssl-in-localhost-takes-5-seconds-now-460i | webdev, nginx, ssl, https | Update on 2024/06/10: Thanks to your great support, it's been downloaded for more than 2,000 times! And we're pleased to announce that it's live on ProductHunt, please visit and support the product!
https://www.producthunt.com/posts/ophiuchi
---
Update on 2024/06/02: We're happy to share with you that we've decided to open-source our application. Please check it out here and feel free to contribute if you wish:
https://github.com/apilylabs/ophiuchi-desktop
---
Why would anyone need to setup ssl for a localhost development?
- Test your web application in a secure environment.
- Some OAuth providers require ssl (like Google).
- Test and find out if there are potential security risks (mixed content) in your application.
- You need to work with CORS and cookies before you deploy your application.
- Test service workers in a secure environment.
- Test web push notifications in a secure environment.
As developers, we’ve all been there.
There is the hard way, and there is the easy way.
If you search the web and what you'll only find is the hard way.
The seemingly simple task of setting up SSL for localhost can surprisingly turn into a multi-hour ordeal, tangled in manual configurations (of which never works first time) and repetitive steps.
###The Hard (Manual and Tedious) SSL Setup on Localhost
Setting up SSL for localhost traditionally involves a series of tedious steps:
**Generating a Self-Signed Certificate:** Initially, you need to manually create a certificate that browsers will inevitably mistrust, just to get started.
**Editing the /etc/hosts File:** Next, you dive into system files like /etc/hosts to map your desired domain name, such as local.whatever, to 127.0.0.1. This usually requires command line tools like vi or nano, which not everyone is comfortable using.
**Launching a Web Server Locally:** Whether it’s Apache, Nginx, or another, you need to download and set up a web server on your machine. (Which I'm not a fan of, because they may mess up my computer)
**Configuring the Web Server:** This involves tweaking server configuration files to recognize your new hostname and certificate, often requiring you to dig through documentation to get syntax and paths right.
**Trusting the Certificate:** Lastly, you must convince your computer to trust the certificate you generated, which often involves several more obscure commands or diving into keychain access nonsense.
This process isn’t just cumbersome — it’s a repeat performance **“every time”** you start a new project or want to test something quickly.
But now, it can be done in 5 seconds.
###Introducing Ophiuchi: Localhost SSL Proxy Made Simple
Now, imagine a tool that condenses all these steps into a quick, seamless operation.
With Ophiuchi, the entire process of setting up SSL for your localhost projects is reduced to a few types and clicks.
Here’s how it simplifies each step:
**Automatic Certificate Generation:** Ophiuchi handles the creation of self-signed certificates automatically for specified domain name. No command line necessary. No hassle.
**Domain Mapping:** Ophiuchi automatically updates your /etc/hosts file with any domain name of your choice, mapping it directly to your localhost environment.
**Integrated Web Server:** Forget about downloading and configuring a separate web server; Ophiuchi comes with an integrated solution that’s pre-configured to use your SSL settings right out of the box. (Docker is required. But most developers use docker naturally for other stuff.)
**Instant Trust:** Ophiuchi includes a feature to automatically add the certificate to your system’s trusted list, bypassing those annoying browser warnings about untrusted certificates.
**Deleting is EZ:** When you’re done using the proxy server and you want to delete it? Above workflow is just reversed!
**It’s Also Secure:** Everything (certs, config files) never leaves your computer, never shared via network.
---
###Why Waste Time?
Time is precious. Why should something as fundamental as testing over HTTPS be a roadblock in your development workflow? With Ophiuchi, it isn’t anymore. This tool is designed for developers by developers, understanding that your time is best spent on creating, not configuring.
Whether you’re working on a personal project or testing enterprise-level applications, Ophiuchi ensures that your shift from HTTP to HTTPS on localhost is as smooth and swift as a few clicks. What used to take hours now takes seconds, freeing you up to focus on what really matters: building great software.
I have to mention it’s still alpha. But I use it every now and then. My teammates also use Ophiuchi a lot and they became happier than ever!
Why not give it a try?
https://www.ophiuchi.dev
---
# Edit:
I (the author) am the creator of this application.
As mentioned in the comments, I understand that security risk is a priority for native desktop apps. All versions of this app is/will be Notarized by Apple for extra security. Next update will include an alternative way for users to manually copy & paste into the terminal for extra safety option!
There is a twitter account you can look at and a discord channel you can freely join if you have any questions! 😃
(Twitter)[https://x.com/get_ophiuchi]
(Discord)[https://discord.gg/fpp8kNyPtz]
| cheeselemon |
1,867,332 | Step-By-Step: Learn Parallel Programming with C# and .NET 2024 🧠 | Transitioning to parallel programming can drastically improve your application’s performance. With C#... | 0 | 2024-05-28T07:50:27 | https://dev.to/bytehide/step-by-step-learn-parallel-programming-with-c-and-net-2024-61e | parallel, tutorial, csharp, dotnet | Transitioning to parallel programming can drastically improve your application’s performance. With C# and .NET, you have powerful tools to write efficient and scalable code. Let’s dive in to explore how you can master parallel programming with these technologies, one step at a time.
## Introduction to Parallel Programming
In this section, we’ll talk about what parallel programming is, why it’s important, and why C# and .NET are perfect for diving into this powerful technique.
### What is Parallel Programming?
Parallel programming is a type of computing architecture where multiple processes run simultaneously. This approach can significantly speed up computations by leveraging multi-core processors.
### The Importance of Parallel Programming in Modern Applications
In today’s world, the demand for faster and more efficient applications is increasing. Whether you’re working on data processing, game development, or web applications, the ability to run tasks concurrently can be a game-changer.
### Benefits of Using C# and .NET for Parallel Programming
When it comes to parallel programming, C# and .NET offer a host of advantages that make them a [prime](https://www.bytehide.com/blog/prime-numbers-csharp) choice for developers. Let’s dive deeper into what makes these technologies stand out.
#### Simplified Syntax and Constructs
One of the most significant benefits of using C# and .NET for parallel programming is the simplified syntax and constructs they offer. With the introduction of the Task Parallel Library (TPL) and `async/await` keywords, writing parallel and asynchronous code has become almost as straightforward as writing synchronous code. Here’s why this matters:
- **Ease of Use**: Utilizing TPL and `async/await` keywords reduces the boilerplate code you need to manage threads and handle complex synchronization mechanisms.
- **Readability**: The code remains clean, readable, and easier to maintain. Here’s a simple example:
```csharp
async Task<string> FetchDataAsync()
{
await Task.Delay(2000); // Simulates a 2-second delay
return "Data fetched!";
}
```
This code snippet shows how easy it is to run an asynchronous operation using `async` and `await`.
#### Excellent Tooling Support
C# and .NET come with excellent tooling support that eases the development process. Visual Studio and Visual Studio Code both offer features like:
- **IntelliSense**: Autocomplete suggestions and parameter info, making coding faster and reducing errors.
- **Debugging Tools**: Powerful debugging tools that can handle parallel and asynchronous code, helping you diagnose issues effectively.
- **Profiling and Diagnostics**: Built-in performance profilers for analyzing the efficiency of your parallel code.
These tools can make your life much easier when developing complex, high-performance applications.
#### Strong Community and Documentation
A robust community and comprehensive documentation are invaluable for any developer, whether you’re a beginner or an expert.
- **Community Support**: The C# and .NET community is vast and active. You’ll find countless tutorials, forums, and discussion boards where you can seek help, share knowledge, and stay updated with the latest trends.
- **Rich Documentation**: Microsoft provides extensive documentation for C# and .NET, covering everything from basic syntax to advanced parallel programming techniques. This resource can guide you through any challenge you might encounter.
#### Additional Benefits
Apart from the points above, there are other benefits to consider:
- **Cross-Platform Capabilities**: With .NET Core and .NET 5+, your parallel applications can run on multiple operating systems, including Windows, macOS, and Linux.
- **Performance Optimizations**: The .NET runtime includes various performance optimizations for parallel and asynchronous operations, taking full advantage of modern multi-core processors.
- **Security**: .NET provides robust security features that help you write safe parallel and asynchronous code, mitigating common multi-threading issues like race conditions and deadlocks.
By engaging with these features and the supportive ecosystem that C# and .NET offer, you can more efficiently develop robust, high-performance parallel applications.
## Getting Started with C# Parallel Programming
Here’s where we get our hands dirty. We will set up the development environment, understand some basic concepts, and write our very first parallelized “Hello World” program.
### Setting Up Your Development Environment
First things first, let’s set up the tools you need. Install Visual Studio or Visual Studio Code and .NET SDK if you haven’t already. These tools will be your playground for exploring parallel programming.
### Understanding the .NET Task Parallel Library (TPL)
The Task Parallel Library (TPL) is a set of public types and APIs in the `System.Threading.Tasks` namespace. It’s the cornerstone for parallel programming in .NET. It abstracts much of the complexity involved in parallelizing tasks. Think of it like a magic wand for making your app faster.
### Hello World: Your First Parallel Program
Enough with the theory, let’s jump into some code! Below is a simple example to run a “Hello World” program in parallel using `Task`.
```csharp
using System;
using System.Threading.Tasks;
class Program
{
static void Main()
{
Task.Run(() => Console.WriteLine("Hello from Task!")).Wait();
Console.WriteLine("Hello from Main!");
}
}
```
By running this code, you’ll see that the message from the `Task` can pop up anytime the `Task` completes, showcasing a basic yet powerful example of parallel execution.
## Deep Dive into Task Parallel Library (TPL)
Let’s dive deeper. We’ll explore creating tasks, managing their state, and using continuations in C#.
### Task Class: Creating and Managing Parallel Tasks
The `Task` class is fundamental to TPL. You can create and start tasks with it.
```csharp
Task myTask = Task.Run(() =>
{
// your code here
Console.WriteLine("Doing some work...");
});
myTask.Wait();
```
In this snippet, we create a task that prints a message and then waits for its completion.
### Task Execution and States
Tasks can have different states, such as `Running`, `Completed`, `Faulted`, etc. You can check task status through the `.Status` property.
```csharp
if (myTask.Status == TaskStatus.RanToCompletion)
{
Console.WriteLine("Task finished successfully.");
}
```
These states help manage task life cycles more effectively.
### Continuations and Task-Based Asynchronous Pattern (TAP)
Continuations allow tasks to chain together, meaning one task can start once another completes.
```csharp
Task firstTask = Task.Run(() => Console.WriteLine("First Task"));
Task continuation = firstTask.ContinueWith(t => Console.WriteLine("Continuation Task"));
continuation.Wait();
```
This chaining mechanism is critical for more complex parallel workflows.
## Using Parallel Class for Data Parallelism
Let’s explore the `Parallel` class, which provides [methods](https://www.bytehide.com/blog/method-usage-csharp) for parallel loops and collection processing.
### Introduction to the Parallel Class
The `Parallel` class simplifies running loops in parallel. It’s like putting your loop on steroids; it runs multiple iterations at the same time.
### Iterating with Parallel.For
Here’s an example using `Parallel.For` to iterate over a range of numbers.
```csharp
Parallel.For(0, 10, i =>
{
Console.WriteLine($"Processing number: {i}");
});
```
In this loop, each iteration runs in parallel, speeding up the processing time significantly compared to a regular loop.
### Processing Collections with Parallel.ForEach
`Parallel.ForEach` works similarly but is used for collections.
```csharp
List<int> numbers = new List<int> { 1, 2, 3, 4, 5 };
Parallel.ForEach(numbers, number =>
{
Console.WriteLine($"Processing number: {number}");
});
```
With this method, you can accomplish parallel processing over any enumerable collection.
### Exception Handling in Parallel Loops
When working with parallel loops, it’s essential to be mindful of [exception handling](https://www.bytehide.com/blog/5-good-practices-for-error-handling-in-c).
```csharp
try
{
Parallel.ForEach(numbers, number =>
{
if(number == 3)
{
throw new InvalidOperationException("Number 3 is not allowed!");
}
Console.WriteLine($"Processing number: {number}");
});
}
catch (AggregateException ae)
{
foreach (var ex in ae.InnerExceptions)
{
Console.WriteLine(ex.Message);
}
}
```
By catching `AggregateException`, you handle multiple exceptions thrown during parallel execution.
## Advanced Parallel Programming Techniques
We’ll now cover advanced topics like task cancellation, combinators, and leveraging the `async/await` keywords.
### Task Cancellation and Timeout Management
You might need to cancel running tasks under specific conditions, which is where task cancellation tokens come in handy.
```csharp
CancellationTokenSource cts = new CancellationTokenSource();
Task longRunningTask = Task.Run(() =>
{
for (int i = 0; i < 10; i++)
{
cts.Token.ThrowIfCancellationRequested();
Console.WriteLine($"Working... {i}");
Thread.Sleep(1000); // Simulate work
}
}, cts.Token);
Thread.Sleep(3000); // Let the task run for a bit
cts.Cancel();
try
{
longRunningTask.Wait();
}
catch (AggregateException ae)
{
Console.WriteLine("Task was cancelled.");
}
```
This snippet demonstrates how to cancel a long-running task using a `CancellationToken`.
### Task Combinators: Task.WhenAll and Task.WhenAny
Task combinators help control the execution flow of multiple tasks.
```csharp
Task task1 = Task.Delay(2000);
Task task2 = Task.Delay(1000);
Task.WhenAll(task1, task2).ContinueWith(_ => Console.WriteLine("Both tasks completed"));
Task.WhenAny(task1, task2).ContinueWith(t => Console.WriteLine("A task completed"));
```
These combinators wait for all or any tasks to complete and then execute the continuation function.
### Async/Await in Parallel Programming
The `async/await` pattern simplifies writing asynchronous code.
```csharp
async Task ProcessDataAsync()
{
await Task.Run(() =>
{
// Simulated async workload
Thread.Sleep(2000);
Console.WriteLine("Data processed.");
});
}
await ProcessDataAsync();
Console.WriteLine("Processing done.");
```
This code runs `ProcessDataAsync` asynchronously, waiting for it to finish [while](https://www.bytehide.com/blog/while-loop-csharp) not blocking the main thread.
## Parallel Programming Design Patterns
Design patterns offer proven solutions to common problems. Let’s see how they apply to parallel programming.
### Data Parallelism Design Patterns
In data parallelism, operations are performed concurrently on different pieces of distributed data. Pattern examples include:
- MapReduce
- Data partitioning
### Task Parallelism Design Patterns
Task parallelism involves running different tasks at the same time. Pattern examples include:
- Divide and Conquer
- Pipeline pattern
### Understanding PLINQ (Parallel LINQ)
PLINQ stands for Parallel [LINQ](https://www.bytehide.com/blog/linq-csharp), which allows for parallel querying of data.
```csharp
var data = Enumerable.Range(1, 100).ToList();
var parallelQuery = data.AsParallel().Where(x => x % 2 == 0).ToList();
parallelQuery.ForEach(Console.WriteLine);
```
By converting the LINQ query to a parallel query, you can process data collections more efficiently.
## Optimizing Parallel Code
Let’s look at some tips to optimize your parallel code and avoid common mistakes.
### Tips for Improving Parallel Code Performance
- Use partitioners for better load balancing.
- Avoid excessive parallelism; too many tasks can be counterproductive.
- Minimize shared state to avoid contention issues.
### Avoiding Common Pitfalls in Parallel Programming
Watch out for race conditions, deadlocks, and thread starvation. These issues can cause your parallel code to behave unpredictably or even crash.
### Profiling and Debugging Parallel Code
Use tools like Visual Studio’s Performance Profiler and Concurrency Visualizer for analyzing parallel code’s performance and behaviors.
## Real-World C# Applications of Parallel Programming
Parallel programming can be a game-changer in many real-world applications. Let’s explore how it’s applied in high-performance computing, scalable web applications, and game development, complete with examples and explanations to help you better understand its impact.
### Parallel Programming for High-Performance Computing
High-performance computing (HPC) is often associated with tasks that require a vast amount of computational power. These tasks benefit immensely from parallel programming, reducing computation times and enhancing performance.
#### Real-Life Example: Weather Forecasting
Weather forecasting involves processing massive datasets to predict weather patterns. Parallel programming can speed up data processing and simulation tasks.
```csharp
using System;
using System.Threading.Tasks;
namespace WeatherSimulation
{
class Program
{
static void Main(string[] args)
{
int gridSize = 1000;
double[,] temperatureData = new double[gridSize, gridSize];
Parallel.For(0, gridSize, i =>
{
for(int j = 0; j < gridSize; j++)
{
temperatureData[i, j] = SimulateTemperatureChange(i, j);
}
});
Console.WriteLine("Temperature simulation completed.");
}
static double SimulateTemperatureChange(int x, int y)
{
// Complex calculation to simulate temperature change
return Math.Sin(x) * Math.Cos(y);
}
}
}
```
In this example, `Parallel.For` is used to run temperature simulations across a grid of data points concurrently, drastically reducing the time needed to complete the calculation.
### Building Scalable Web Applications with Parallel Programming
Web applications must handle numerous concurrent users efficiently. Using parallel programming for data processing and background tasks can improve responsiveness and scalability.
#### Real-Life Example: Handling Concurrent Web Requests
Consider an e-commerce application where users can search for products. By processing search queries in parallel, the application can handle more users without degrading performance.
```csharp
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace EcommerceApp
{
class Program
{
static void Main(string[] args)
{
List<string> searchTerms = new List<string> { "laptop", "smartphone", "camera" };
List<Task<List<string>>> searchTasks = searchTerms.Select(term =>
Task.Run(() => SearchProducts(term))
).ToList();
Task.WhenAll(searchTasks);
foreach (var task in searchTasks)
{
var result = task.Result;
Console.WriteLine($"Search completed for {result.Count} products.");
}
}
static List<string> SearchProducts(string term)
{
// Simulate product search operation
Task.Delay(1000).Wait();
return new List<string> { $"{term} 1", $"{term} 2", $"{term} 3" };
}
}
}
```
This code demonstrates running multiple product search operations concurrently, improving the user experience by reducing the time to return search results.
### Game Development and Other Industry Use Cases
Game development often includes complex tasks like physics calculations, AI behaviors, and rendering that can benefit from parallel programming.
#### Real-Life Example: Real-Time Physics Simulation
Parallel programming can help handle physics calculations for multiple game objects simultaneously, ensuring smooth gameplay.
```csharp
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
namespace GameDevelopment
{
class Program
{
static void Main(string[] args)
{
List<GameObject> gameObjects = InitializeGameObjects(1000);
Parallel.ForEach(gameObjects, gameObject =>
{
gameObject.UpdatePhysics();
});
Console.WriteLine("Physics update completed.");
}
static List<GameObject> InitializeGameObjects(int count)
{
List<GameObject> gameObjects = new List<GameObject>();
for (int i = 0; i < count; i++)
{
gameObjects.Add(new GameObject());
}
return gameObjects;
}
}
class GameObject
{
public void UpdatePhysics()
{
// Simulate complex physics calculations
Task.Delay(10).Wait();
}
}
}
```
In this scenario, `Parallel.ForEach` is used to update the physics for thousands of game objects simultaneously, thereby improving the game’s performance and responsiveness.
### Parallel Programming in Financial Services
Financial services also see significant benefits from parallel programming. Tasks like risk calculations, fraud detection, and market simulations are parallel-friendly.
#### Real-Life Example: Risk Calculation
Banks and financial institutions often need to calculate risks for numerous portfolios. Parallel programming can significantly speed up these calculations.
```csharp
using System;
using System.Threading.Tasks;
namespace FinancialServices
{
class Program
{
static void Main(string[] args)
{
int numberOfPortfolios = 1000;
double[] riskValues = new double[numberOfPortfolios];
Parallel.For(0, numberOfPortfolios, i =>
{
riskValues[i] = CalculateRisk(i);
});
Console.WriteLine("Risk calculation completed.");
}
static double CalculateRisk(int portfolioId)
{
// Simulate complex risk calculation
Task.Delay(100).Wait();
return new Random().NextDouble() * 100;
}
}
}
```
In this example, `Parallel.For` allows concurrent risk calculations for multiple portfolios, reducing the total processing time significantly.
### Parallel Programming in Bioinformatics
Bioinformatics involves analyzing biological data, often requiring heavy computations. Parallel programming can speed up tasks like sequencing and gene analysis.
#### Real-Life Example: DNA Sequencing
Parallel programming can be used to process different segments of DNA data concurrently.
```csharp
using System;
using System.Threading.Tasks;
namespace Bioinformatics
{
class Program
{
static void Main(string[] args)
{
string[] dnaSegments = new string[] { "AGTC", "GATTACA", "CGTA" };
Parallel.ForEach(dnaSegments, segment =>
{
ProcessSegment(segment);
});
Console.WriteLine("DNA sequencing completed.");
}
static void ProcessSegment(string segment)
{
// Simulate DNA segment processing
Task.Delay(100).Wait();
Console.WriteLine($"Processed segment: {segment}");
}
}
}
```
By processing each DNA segment in parallel, the overall time for sequencing and analysis is considerably reduced.
## Best Practices in Parallel Programming
Adhering to best practices ensures your parallel code is maintainable, efficient, and robust.
### Writing Maintainable Parallel Code
Keep your code clear and well-documented. Modularize your code to isolate parallel sections.
### Ensuring Thread Safety
Use synchronization mechanisms like locks, mutexes, and semaphores to ensure thread safety.
```csharp
private static readonly object lockObj = new object();
void SafeMethod()
{
lock (lockObj)
{
// Thread-safe code
}
}
```
### Testing Parallel Applications
Thoroughly test your parallel code for edge cases, race conditions, and proper handling of shared resources.
## Conclusion
This comprehensive guide has taken you from the basics of parallel programming to advanced techniques and real-world applications in C# and .NET. You’ve learned how to set up your development environment, explored the Task Parallel Library (TPL), and discovered the power of the `Parallel` class for data parallelism and task parallelism. Additionally, you’ve delved | bytehide |
1,867,326 | Unveiling the Magic of hover, focus and active variants in Tailwind CSS. | 💡𝐏𝐫𝐨 𝐓𝐢𝐩: Make your UI elements pop with Tailwind CSS! Use 𝐡𝐨𝐯𝐞𝐫, 𝐟𝐨𝐜𝐮𝐬, and 𝐚𝐜𝐭𝐢𝐯𝐞 variants to... | 0 | 2024-05-28T07:43:15 | https://dev.to/priyankachettri/unveiling-the-magic-of-hover-focus-and-active-variants-in-tailwind-css-54pg | 💡𝐏𝐫𝐨 𝐓𝐢𝐩: Make your UI elements pop with Tailwind CSS! Use 𝐡𝐨𝐯𝐞𝐫, 𝐟𝐨𝐜𝐮𝐬, and 𝐚𝐜𝐭𝐢𝐯𝐞 variants to enhance user experience and engagement. Your designs will thank you!
Dive into this demo to see them in action!
Ready to give it a try? Check out the code below and start
experimenting! 👇
{% embed https://youtu.be/-NeBA9blo4o %}
➡️ Snippet of "hover" variant applied to a button.
➡️ Snippet of a "focus" variant applied to a button
➡️ Snippet of an "active" variant applied to a button
| priyankachettri | |
1,867,331 | Skinhance: Laser And Aesthetics | Step into the world of Skinhance, where Dr. Jasmine Kaur expertise and passion for skin care come... | 0 | 2024-05-28T07:50:05 | https://dev.to/skinhance/skinhance-laser-andaesthetics-me8 | beginners, writing, android, design | Step into the world of Skinhance, where [Dr. Jasmine Kaur](https://skinhance.in/) expertise and passion for skin care come together to deliver exceptional results. From acne to anti-aging, our advanced treatments and personalized consultations ensure you receive the best care for your skin. Experience the Skinhance differenc
e - where every visit is a step towards a more confident you. | skinhance |
1,867,330 | MUST KNOW LINUX COMMANDS FOR BEGINNERS | It's common for web developers and software development aspirants to work on linux operating system.... | 0 | 2024-05-28T07:45:29 | https://dev.to/shreeprabha_bhat/must-know-linux-commands-for-beginners-14hn | linux, webdev, beginners | It's common for web developers and software development aspirants to work on linux operating system. Compared to other operating systems linux is versatile and open source operating system. Understanding liux has become crucial for tech enthusiasts, system administrators and also fresh graduates who are looking forward for their career in tech market.
Let's know more about some of the most commonly used commands which are frequently asked in the interviews as well.
**1. cd path/to/directory -Changes the current directory**
This is the most commonly used command in the linux operating system. Whenever user want to navigate to a new folder he/she can make use of this command.
Options available:
**cd ..** :Comes out from the current folder
**cd** :Moves back to the home directory
**2. ls -List files**
This command is used to know about the list of files that are present in the current working folder.
Options available:
**ls -l** :Long listing format
**ls -a** :Lists hidden files
**3. pwd -Present working directory**
This command is used to display the current working folder.
**4. mkdir directory_name -Make directory**
This command is used whenever user want to create a new folder.
**5. rmdir directory_name -Remove director**
Above command is used whenever user wants to remove a folder that is empty.
**6. rm fil_name -Removes a file**
Above command is used whenever user wants to remove specific file from a directory. Along with options the command can also be used to remove directories.
Options available:
**rm -r directory_name** :Removes a directory along with all its files and other contents.
**7. cp source_file destination_file -Copy file contents**
This command is used whenever user wants to copy the contents of one file to another. Here the contents present in source_file will be copied to destination_file.
Options available:
**cp -r source_directory destination_directory** : Functions similar to file copying but here the entire contents of source_directory will be copied to destination_directory.
**8. mv old_name new_name -Moves or renames a file**
Above command is used whenever user wants to rename a file, here the file with old_name will be renamed to new_name.
**9. cat file_name -Concatenate file**
Using the above command user can view the contents of file_ name over the console.
**10. head file_name**
Using the above command user can just view the first ten lines present in the file.
Options available:
**head -n 5 file_name** -User can view only first five lines of file. Using this option user can vary the number of lines visible
**11. tail file_name**
Similar to head command here we can view the last ten lines present in the file.
Options available:
**tail -n 5 file_name** -To view the last five lines instead of default ten.
**12. ps**
Using this command one can know about the processes that are currently being run in the system. It displays the processes with their PID.
**13. kill pid**
We can use this command whenever we want to stop a process that is running in the system. PID required can be acquired from the ps command.
**14. whoami**
Using this command one can know about the user of the system.
**15. uname -a**
This command displays the user name along with the system information.
**CONCLUSION**
There are huge set of commands being used while working with linux operating systems. The commands explained here are the basic set and mainly asked in the interviews of entry level candidates.
| shreeprabha_bhat |
1,867,329 | The Transformative Power of Custom Healthcare Software Development Companies | In today’s fast-paced world, technology is revolutionizing how we live and work, and healthcare is no... | 0 | 2024-05-28T07:45:02 | https://dev.to/stevemax237/the-transformative-power-of-custom-healthcare-software-development-companies-gm2 | softwaredevelopment, healthcare | In today’s fast-paced world, technology is revolutionizing how we live and work, and healthcare is no exception. The rise of [custom healthcare software development companies](https://www.mobileappdaily.com/directory/software-development-companies/healthcare?utm_source=dev&utm_medium=hc&utm_campaign=mad) is one of the most exciting advancements in this field. These specialized firms design and implement tailor-made software solutions that address the unique needs of healthcare providers, patients, and administrators. Let’s explore how these companies are transforming healthcare, making it more efficient and patient-centric.
## The Need for Custom Healthcare Software
Healthcare organizations face a myriad of challenges, from regulatory compliance and data security to patient engagement and efficient management of clinical and administrative tasks. Off-the-shelf software solutions often fall short of meeting the specific requirements of diverse healthcare settings. This is where custom healthcare software development companies come into play. They offer bespoke solutions designed to fit the unique workflows, processes, and goals of healthcare providers.
Custom software solutions can integrate seamlessly with existing systems, ensuring that all aspects of a healthcare organization work harmoniously. These solutions can range from electronic health records (EHR) systems, patient management software, and telemedicine platforms, to specialized applications for managing chronic diseases or ensuring medication adherence.
## Enhancing Patient Care and Engagement
One of the primary benefits of custom healthcare software is enhancing patient care and engagement. Personalized software solutions can streamline patient management by automating routine tasks, allowing healthcare professionals to focus more on patient care. For example, custom EHR systems provide easy access to patient histories, lab results, and treatment plans, facilitating better-informed decisions and personalized care.
Patient engagement tools developed by custom healthcare software development companies include patient portals, mobile apps, and telehealth services. These tools enable patients to schedule appointments, access their medical records, communicate with their healthcare providers, and receive reminders for medications or follow-up visits. By giving patients more control over their health, these solutions improve patient satisfaction and outcomes.
## Streamlining Administrative Processes
Healthcare administration involves complex and time-consuming tasks that can be significantly streamlined with the right software. Custom healthcare software development companies create solutions that automate billing, coding, scheduling, and compliance reporting. This automation reduces the administrative burden, minimizes errors, and enhances productivity.
For instance, custom billing software can handle the intricacies of medical billing codes, insurance claims, and payment processing, ensuring timely and accurate reimbursements. Scheduling software can optimize appointment slots, reducing wait times and improving patient flow. By integrating these functionalities into a cohesive system, healthcare organizations can operate more efficiently and focus on delivering high-quality care.
## Ensuring Data Security and Compliance
In an era where data breaches are increasingly common, safeguarding patient information is paramount. Custom healthcare software development companies prioritize data security and compliance with regulations such as the Health Insurance Portability and Accountability Act (HIPAA). These companies design software with robust security features, including encryption, access controls, and audit trails, to protect sensitive patient data from unauthorized access and cyber threats.
| stevemax237 |
1,867,328 | Why Freeze-Dried Candy Stores Are the New Hotspot for Candy Lovers | For candy enthusiasts in the USA, the landscape of sweet treats is undergoing a delicious... | 0 | 2024-05-28T07:44:39 | https://dev.to/williamrichardsun/why-freeze-dried-candy-stores-are-the-new-hotspot-for-candy-lovers-2hl7 | discuss | For candy enthusiasts in the USA, the landscape of sweet treats is undergoing a delicious transformation. Gone are the days of simply reaching for a bag of gummies or chocolate bars. A new trend is taking the candy world by storm: **[freeze-dried candy stores](https://www.rocketkrunch.com/)**.
These unique shops offer an explosion of flavor and texture unlike anything you've experienced before. But what exactly is freeze-dried candy, and why are these stores becoming the hottest destination for candy lovers across the USA?
**
## What is Freeze-Dried Candy?
**
Freeze-dried candy undergoes a special process that removes almost all of the moisture content while preserving the original flavor and shape. This creates a lightweight, hyper-concentrated candy that explodes with taste in your mouth. Imagine your favorite candy, but with an intense and delightful flavor boost – that's the magic of freeze-dried candy!
**_Here's a breakdown of the freeze-drying process:_**
- **Freezing:** The candy is rapidly frozen at extremely low temperatures, locking in the flavor and structure.
- **Sublimation:** Under a vacuum, the pressure is lowered, causing the frozen water molecules in the candy to turn directly into vapor, bypassing the liquid stage.
- **Desiccation:** Any remaining moisture is removed using a low-heat process, resulting in a shelf-stable, lightweight candy.
**[Want to more about what is freeze dried candy](https://www.rocketkrunch.com/blogs/topics/what-is-freeze-dried-candy-all-you-should-know)**
**
## Why Are Freeze-Dried Candy Stores So Popular?
**
There are several reasons why freeze-dried candy stores are captivating candy lovers in the USA:
- **Intensified Flavor:** The freeze-drying process concentrates the candy's natural flavors, creating an incredibly flavorful experience.
- **Unique Texture:** Freeze-dried candy has a light, airy texture that's unlike traditional candy. It often melts in your mouth, delivering a burst of flavor with every bite.
- **Long Shelf Life:** Because most of the moisture is removed, freeze-dried candy has a significantly longer shelf life compared to regular candy.
- **New Candy Experiences:** Freeze-drying allows for experimentation with candies that wouldn't hold their shape in their original form. Imagine freeze-dried ice cream or yogurt drops – the possibilities are endless!
Tips for Visiting a Freeze-Dried Candy Store:
Be adventurous! With so many unique offerings, don't be afraid to try something new. You might discover your next favorite candy.
Start small! The intense flavors of freeze-dried candy can be overwhelming at first. Begin with a smaller portion to fully appreciate the taste.
Consider gifting: Freeze-dried candy makes a unique and delightful gift for any candy lover.
**
## Where to Find Freeze-Dried Candy Stores in the USA?
**
The popularity of freeze-dried candy is rapidly growing across the USA. While brick-and-mortar stores are still emerging, many online retailers offer a wide selection of freeze-dried candies.
One brand leading the charge is Rocket Krunch. They offer a variety of freeze-dried favorites, including:
-** Original Skittles:** Experience the classic rainbow of flavors in a whole new way with freeze-dried Skittles.
- **Wild Berry Skittles:** Take your taste buds on a wild ride with the intense berry flavors of freeze-dried Wild Berry Skittles.
- **Sour Skittles:** Pucker up for a burst of sourness with freeze-dried Sour Skittles.
- **Sour Wild Berry Skittles:** Combine the intense fruit flavors of Wild Berry Skittles with a sour kick for an unforgettable candy experience.
- **Mini Starblasters:** Relive your childhood with the iconic fruity taste of freeze-dried Mini Starblasters.
**Note:** When searching for freeze-dried candy stores or online retailers, you might encounter variations in terminology. Here are some additional terms to keep in mind:
- Freeze dry candy
- Freeze dried candies
- Dry freeze candy
- Freezed dried candy
- Dried freeze candy
- Freeze drying candy
- Dehydrated candy
By using these terms in your search, you'll be well on your way to discovering the delightful world of freeze-dried candy.
**
## The Future of Freeze-Dried Candy Stores
**
**Candy Subscriptions:** Imagine receiving a monthly box filled with a variety of unique freeze-dried candies delivered directly to your doorstep. This subscription service could cater to different taste preferences, offering options for sour lovers, chocolate fans, or fruit enthusiasts.
**DIY Freeze-Drying:** While freeze-drying equipment might not be readily available for home use yet, advancements in technology could lead to more accessible options for consumers who want to experiment with freeze-drying their own candy creations.
**
## The Final Bite: Why You Should Try Freeze-Dried Candy
**
Whether you're a seasoned candy connoisseur or simply looking for a new and exciting treat, freeze-dried candy stores are a must-visit. The intense flavors, unique textures, and extended shelf life make them a compelling option for anyone with a sweet tooth. So, ditch your regular candy bars and embark on a flavor adventure with **[freeze-dried candy](https://www.rocketkrunch.com/collections)**!
Here are some additional points to consider:
Healthier Options: While freeze-drying preserves the flavor of candy, it can also concentrate the sugar content. If you're looking for a healthier alternative, some freeze-dried candy stores offer options made with natural ingredients and less sugar.
Sustainability: The freeze-drying process can be more energy-efficient compared to traditional candy production methods. For environmentally conscious consumers, this can be a factor to consider when choosing freeze-dried candy.
By supporting innovative stores like Rocket Krunch, you're not only indulging in a delicious treat but also contributing to the exciting future of freeze-dried candy in the USA. So, what are you waiting for? Start exploring the world of freeze-dried candy and discover a whole new way to experience your favorite sweets! | williamrichardsun |
1,867,327 | Instructions for Installing Interactive Brokers IB Gateway in Linux Bash | FMZ platform now supports the integration of Interactive Brokers (IB). It's quite simple on Windows,... | 0 | 2024-05-28T07:44:17 | https://dev.to/fmzquant/instructions-for-installing-interactive-brokers-ib-gateway-in-linux-bash-8m5 | linux, ib, gateway, fmzquant | FMZ platform now supports the integration of Interactive Brokers (IB). It's quite simple on Windows, so we won't explain how to install it here. For Linux users who generally rent servers without a graphical interface and only have SSH, the installation is more challenging. This article will explain how to install IB Gateway for quantitative trading. We usually choose to install IB Gateway instead of TWS client, because the TWS client shuts down periodically and is not suitable for quantitative trading. Here we take Debian as an example:
**Step 1: Install Desktop Services and VNC**
First, you need to install desktop services and a VNC server to enable remote desktop access. Here, we will use xfce and TightVNC as examples. Execute the following commands in the terminal to install:
```
sudo apt update
sudo apt install xfce4 xfce4-goodies dbus-x11
sudo apt install tightvncserver
tightvncserver
```
Please note that the maximum length for the password during installation is 8 characters. Please set a highly secure password. The default startup port for the first session is 5901.
**Step 2: Connect to VNC and Install IB Gateway**
The default address is vnc://IP Address:5901, you can log in by entering the password. For Windows, please download and install the VNC client yourself.
Download page: https://www.interactivebrokers.com/en/trading/ibgateway-stable.php
Please use a tool similar to wget for downloading. If you can't find the corresponding version, please click on "Download for Other Operating Systems" on the page to search.
```
wget https://download2.interactivebrokers.com/installers/ibgateway/stable-standalone/ibgateway-stable-standalone-linux-x64.sh
```
If it's inconvenient to download within VNC, you can initiate a separate SSH download and then install it under the VNC desktop environment.
```
bash ibgateway-stable-standalone-linux-x64.sh
```
The interface can already be displayed here, you can manually run the installation directory directly by running ./ibgateway.
After installation, log in and find the API option. Make sure to uncheck "Read-Only API". The port number is also in the settings. Please configure the exchange correctly according to this port number.
The exchange is configured as follows: Client ID. If you have multiple robots that need to connect, this needs to be set to different IDs, as IB does not allow the same Client ID to connect simultaneously.
It should be noted that localhost and 127.0.0.1 are not the same network address at the lower level of the Linux operating system, here we use localhost.
IB's market data requires a paid subscription. If you need real-time ticker and depth information, please subscribe for a fee, otherwise you can only receive delayed tickers.
From: https://blog.mathquant.com/2023/12/04/instructions-for-installing-interactive-brokers-ib-gateway-in-linux-bash.html | fmzquant |
1,867,325 | Efficient Coconut Meat Processing for High-Quality Products | Coconut meat processing is an exciting field that has seen significant growth in recent years, thanks... | 0 | 2024-05-28T07:42:13 | https://dev.to/xjsjw_cmksjee_e594b674d22/efficient-coconut-meat-processing-for-high-quality-products-30oj | coconut, meat | Coconut meat processing is an exciting field that has seen significant growth in recent years, thanks to innovations that have made it more efficient and safe. We will explore the advantages of efficient coconut meat processing, the innovative techniques used in the process, how to use the products produced, the quality of the products, the different applications, and the services available.
Benefits of Efficient Coconut Meat Processing
Effective coconut meat processing has advantages which can be numerous such as for instance in the near order of nourishment.
Coconut meat is a way like superb obtain dietary fiber, healthy fats, and amino acids that are needed for building and repairing muscle tissue.
The nutritional features of the coconut by processing coconut meat efficiently, manufacturers can make things that are high-quality withhold.
An advantage like extra of may be the chance for profitability.
The need for healthy food products is concerning the increase, and items which are coconut-based getting increasingly popular.
By creating coconut like top-notch, manufacturers can utilize a market like growing increasing their profits.
Innovation in Coconut Meat Processing
Revolutionary strategies have already been developed to enhance the efficiency of coconut meat processing.
One technique like particular the usage of specialized machinery that will draw out the coconut meat through the shell quickly enough basis for minimal wastage.
The machines are designed to split the meat through the shell and peel it, leaving just the meat like white that might be employed for various items.
Another innovation might be the usage of pasteurization.
Pasteurization is a procedure that calls for heating the coconut meat to a heat like kill like particular undesirable organisms that might be current.
This makes the products safer for consumption and guarantees an shelf life like extended.
Simple tips to Use Coconut Items
Coconut products made out of efficient processing can be employed in various ways.
Coconut milk is a well known ingredient utilized in curries, soups, and smoothies.
Coconut cream, with that said, can be utilized in desserts such as for example ice cream, cakes, and pies.
Coconut flour is a replacement like fantastic is gluten-free wheat flour and it is trusted in baking.
Coconut oil could very well be probably the most versatile of all of the coconut products and contains applications being now numerous.
It can be utilized for cooking, as a moisturizer like normal the hair and skin, and is an element in several cosmetics and cosmetics.
Quality of Coconut Items
The grade of coconut items made out of efficient processing is extremely high.
These items are manufactured from fresh, ripe coconuts, in addition to the processing means the nutrients is retained, as well as the products are clear of contaminants.
Also, the merchandise are very carefully packaged to keep their freshness.
Coconut items created from efficient processing are pure and contain no additives being preservatives that are harmful.
They are created from high-quality recycleables and generally speaking are manufactured making use of strict quality control measures to ensure the past items are concerning the quality like finest like possible.
Application of Coconut Products
Crushing Series Coconut products have actually applications that are numerous multiple industries.
In to the food industry, coconut services and products may be used as ingredients in many recipes.
The healthcare industry additionally utilizes coconut services and products as dietary supplements and also as an all fix like natural afflictions that are various.
The wonder and makeup like cosmetic companies additionally use coconut services and products, mainly coconut oil, in lots of items such as for example lotions, shampoos, and soaps.
Cleansing products and candles also use coconut oil as the ingredient like main.
Service Offerings
Efficient coconut meat processing organizations give you a range of solutions along with their clients, from consultancy to gear product sales.
Several businesses give a turnkey solution, from processing the coconut meat to packaging the product like last.
Clients can request modified solutions that are processing satisfy their needs which can be specific.
Most service providers also provide tech help team when it comes to gear and processing, upkeep, and fix solutions, making certain customers likewise have the resources they ought to produce products which are high-quality.
In Conclusion
Efficient Coconut Meat Processing Equipment has many advantages, including improved nutrition, profitability, and safety. Innovative techniques have resulted in the development of sophisticated machinery and pasteurization processes that have improved the efficiency and safety of coconut meat processing. The products produced are of high quality and are suitable for use in various industries, including food, health, cosmetics, and cleaning products. Efficient coconut meat processing companies offer a whole range of services from consultancy, customized processing, and after-sales technical support services, aimed at ensuring customers have what they need to deliver top-quality products.
Source: https://www.enkeweijx.com/Coconut-meat-processing-equipment | xjsjw_cmksjee_e594b674d22 |
1,866,694 | How to Fix The Telegram Mini App Scrolling Collapse Issue: A Handy Trick | Note: I was supposed to update this article with a new method due to some bugs it had, but... | 0 | 2024-05-28T07:41:46 | https://dev.to/nimaxin/how-to-fix-the-telegram-mini-app-scrolling-collapse-issue-a-handy-trick-1abe | telegram, telegrambot, javascript | **Note:** I was supposed to update this article with a new method due to some bugs it had, but unfortunately, I haven't had the time yet. However, based on some existing trend mini-apps, I devised a better trick to prevent the mini-app from closing and control this issue. a sample web app that uses this new trick for fixing this issue is available to check out here: ([Demo Mini App](https://t.me/webapp_theme_inspector_bot/dev)). Also, I have provided the code snippets for this mini app in this [Github gist](https://gist.github.com/nimaxin/758c83f66c0084e66074c19c5e1fdd13).
_The logic and explanations in this article remain valid and applicable._
### Introduction
Telegram Mini Apps empower developers to create dynamic interfaces using JavaScript directly within the platform. However, on touchscreen devices, users frequently encounter **unexpected collapses or scrolling issues** while interacting with these Mini Apps, significantly impacting the overall user experience.
### Visual Comparsion:
Before diving into discussing why it's happening and the solution for it, let's visually observe the problem.
|  |  |
|:-------------------------------------------:|:-------------------------------------------:|
| **Bug:** Swiping down the Telegram Mini App causes it to collapse instead of scrolling |**Fixed:** Swiping down the Telegram Mini App now correctly scrolls through the content after the issue is fixed!|
### Why It Happens
The scrolling collapse occurs when the document inside the Telegram Mini App is either not scrollable (with a height equal to the `viewport`) or scrollable but not scrolled (where the `scrollY` of the `window` object equals zero). In such instances, swiping down is interpreted as a command to collapse the document, reducing its size.
Now let's proceed to implement the solution. I'll provide a step-by-step guide to resolve the problem.
### Step-by-Step Solution:
#### Step 1: Ensure the Document is Scrollable:
Firstly, it's essential to ensure that the document is scrollable. We achieve this by checking if the document's scroll height is greater than the viewport height. If not, we adjust the document's height accordingly.
```javascript
// Ensure the document is scrollable
function ensureDocumentIsScrollable() {
const isScrollable =
document.documentElement.scrollHeight > window.innerHeight;
// Check if the document is scrollable
if (!isScrollable) {
/*
Set the document's height to 100 % of
the viewport height plus one extra pixel
to make it scrollable.
*/
document.documentElement.style.setProperty(
"height",
"calc(100vh + 1px)",
"important"
);
}
}
// Call ensureDocumentIsScrollable function when the entire page has loaded.
window.addEventListener("load", ensureDocumentIsScrollable);
```
#### Step 2: Prevent `window.scrollY` from Becoming Zero
Next, we prevent window.scrollY from becoming zero when swiping down on the scrollable element. This prevents unexpected collapses when swiping down.
```javascript
// Prevent windwo.scrollY from becoming zero
function preventCollapse(event) {
if (window.scrollY === 0) {
window.scrollTo(0, 1);
}
}
// Attach the above function to the touchstart event handler of the scrollable element
const scrollableElement = document.querySelector(".scrollable-element");
scrollableElement.addEventListener("touchstart", preventCollapse);
```
Now that we've outlined the steps, let's integrate the solution into your code. Below is the full code snippet. _I've removed unnecessary code and styles to understand the code better._
```html
<html>
<head>
<style>
.scrollable-element {
overflow-y: scroll;
height: 32rem;
font-size: 6.25rem;
border: 1px solid;
}
</style>
</head>
<body>
<div class="scrollable-element">
<div>Item 1</div>
<div>Item 2</div>
<div>Item 3</div>
<div>Item 4</div>
<div>Item 5</div>
<div>Item 6</div>
<div>Item 7</div>
<div>Item 8</div>
<div>Item 9</div>
<div>Item 10</div>
</div>
<script>
function ensureDocumentIsScrollable() {
const isScrollable =
document.documentElement.scrollHeight > window.innerHeight;
if (!isScrollable) {
document.documentElement.style.setProperty(
"height",
"calc(100vh + 1px)",
"important"
);
}
}
function preventCollapse() {
if (window.scrollY === 0) {
window.scrollTo(0, 1);
}
}
const scrollableElement = document.querySelector(".scrollable-element");
scrollableElement.addEventListener("touchstart", preventCollapse);
window.addEventListener("load", ensureDocumentIsScrollable);
</script>
</body>
</html>
```
By implementing these adjustments, your Telegram Mini App will no longer suffer from unexpected collapses when scrolling for swiping down.
I encourage you to deploy the provided code for a Telegram Web App and observe the results firsthand.
Additionally, you can experience the fix in action on a Telegram Mini App I've applied this solution to: [@theme_inspector_bot](https://t.me/theme_inspector_bot/app) | nimaxin |
1,867,324 | Steps to Create a Resource Group in Azure | Sign in to access Resource Groups. Log in to the Azure portal at... | 0 | 2024-05-28T07:40:18 | https://dev.to/chifum/steps-to-create-a-resource-group-in-azure-1md5 | Sign in to access Resource Groups.
1. Log in to the Azure portal at https://azure.microsoft.com/en-us/get-started/azure-portal.
2. Enter your login credentials username, password and hit the submit button.
3. It will take you to the Azure Portal Home https://portal.azure.com/#home
4. Select "Resource groups" from the left navigation pane or search for "Resource groups" using the search.
Create a New Resource Group
1. To enter to "Create a Resource Group" click the "+ Create" button.
Project details.
1. Choose the Azure subscription you wish to use for the resource group.
2. Enter a distinctive name for your resource group.
3. Choose an area for your resource group; the resources inside it do not have to be all from that region.
Add Tags (optional)
1.Tags are key-value pairs used to categorise resources for easy management and billing.
Review and Create
1. Click "Review + Create" to go over the details of your resource group.
2. Once satisfied, click "Create" to set up the resource group.
3. Resource Group Created
| chifum | |
1,867,323 | How I develop Paste feature for bubble.io | I was talking to bubble developer and he was complaining that bubble don't have feature or plugin... | 0 | 2024-05-28T07:37:38 | https://dev.to/usama4745/how-i-develop-paste-feature-for-bubbleio-44ic | nocode, webdev, javascript | I was talking to bubble developer and he was complaining that bubble don't have feature or plugin using which we can assign paste action to UI element
So I decided to give it a try
**For those who don't know bubble.io is a low code tool using which we can develop almost any kind of software but without coding**
So I started to brain storm how to achieve this.
I logged in to my bubble account and created a new plugin
Basically you can easily extend bubble functionality and API to develop custom feature and that can be done using javascript
Bubble provides you hosting and it also manages versions and payment system for your plugin in case you decide to commercialize your plugin
So first of all I developed Paste action in my local system using VScode
In the beginning it was tough to develop such thing because all the older methods of developing paste action became obsolete. And there wasn't much help related to implementing paste action according to latest version of browsers.
But I memorize that I have used paste action somewhere as a user and that website was of video to mp3 converter where we used to paste url of video and it convert to mp3 audio and there are tons of such websites.
So I navigated to url of one of those website and just did inspect element and **boom!!!** I got the code for paste action feature that was the code which I wasn't able to find anywhere on stackoverflow or on any other medium article
Here is the link to the Plugin: https://bubble.io/plugin/paste-from-clipboard-1706291947141x848814483050332200 | usama4745 |
1,867,322 | What is software testing ? what we need to know about software testing ? What is the relevance of software testing ? | Software testing is a pivotal aspect of the software development lifecycle, encompassing a systematic... | 0 | 2024-05-28T07:35:50 | https://dev.to/nandhini_manikandan_/what-is-software-testing-what-we-need-to-know-about-software-testing-what-is-the-relevance-of-software-testing--4o9j |
Software testing is a pivotal aspect of the software development lifecycle, encompassing a systematic and methodical examination of software products to uncover defects, bugs, or inconsistencies within their functionalities. It's a meticulous process that verifies whether the software behaves as expected, meets specified requirements, and performs reliably under various conditions. At its core, software testing serves to enhance the quality, reliability, and security of software applications, ultimately ensuring a seamless user experience.
Understanding software testing entails delving into various dimensions:
Firstly, the types of testing available span a wide spectrum, including unit testing, integration testing, system testing, acceptance testing, and regression testing, among others. Each type serves a distinct purpose in scrutinizing different aspects of the software's functionality and behavior, ensuring comprehensive coverage throughout the development lifecycle.
Secondly, the adoption of different testing techniques is essential for thorough examination. Techniques such as black-box testing, white-box testing, grey-box testing, and exploratory testing offer diverse perspectives into the software's operations, aiding in the discovery of different types of defects and vulnerabilities.
Effective test planning and strategy form the bedrock of successful testing endeavors. This involves defining clear test objectives, identifying relevant test scenarios, prioritizing test cases, and allocating resources efficiently. A well-crafted test strategy ensures maximum test coverage while optimizing resource utilization, thereby enhancing the effectiveness and efficiency of the testing process.
Test automation emerges as a crucial component in accelerating testing activities and improving productivity. Automated testing tools and frameworks streamline repetitive test cases, reduce manual effort, and ensure consistent test execution across different iterations. However, it's imperative to strike a balance between automated and manual testing, recognizing that not all tests can or should be automated.
The relevance of software testing in today's digital landscape cannot be overstated:
Quality assurance through rigorous testing is paramount for delivering software products that meet user expectations, comply with industry standards, and withstand the rigors of the competitive market. By identifying and rectifying defects early in the development lifecycle, testing helps mitigate risks, reduce rework, and enhance the overall quality and reliability of software applications.
Furthermore, software testing plays a pivotal role in ensuring regulatory compliance, particularly in highly regulated industries such as healthcare, finance, and aerospace. Adherence to regulatory requirements through comprehensive testing helps mitigate compliance risks, avoid penalties, and uphold organizational integrity and credibility.
Additionally, software testing directly impacts customer satisfaction and loyalty by ensuring that software products meet user needs, function reliably, and deliver a seamless user experience. High-quality software that is free from defects and glitches enhances user trust, fosters brand loyalty, and drives business growth and profitability.
In conclusion, software testing is a critical function within the software development lifecycle, integral to delivering high-quality, reliable, and secure software products. Through meticulous examination, strategic planning, and continuous improvement, software testing enables organizations to mitigate risks, enhance customer satisfaction, and gain a competitive edge in today's dynamic and competitive marketplace. Investing in robust software testing practices is not only a prudent business decision but also a fundamental requirement for delivering superior software solutions that meet the evolving needs and expectations of users and stakeholders. | nandhini_manikandan_ | |
1,867,321 | How to create a countdown with Tailwind CSS and JavaScript | Let's recreate the countdown timer from the tutorial with Alpine.js but with vainilla... | 0 | 2024-05-28T07:35:49 | https://dev.to/mike_andreuzza/how-to-create-a-countdown-with-tailwind-css-and-javascript-4akg | webdev, tutorial, javascript, tailwindcss | Let's recreate the countdown timer from the tutorial with Alpine.js but with vainilla JavaScript.
[Read the article, See it live and get the code](https://lexingtonthemes.com/tutorials/how-to-create-a-countdown-with-tailwind-css-and-javascript/)
| mike_andreuzza |
1,867,319 | SJK Innovations robotic palletizer | In essence, Logistics Warehouse Automation with SJK Innovations represents the future of warehouse... | 0 | 2024-05-28T07:34:33 | https://dev.to/sjk_innovations/sjk-innovations-robotic-palletizer-2bo5 | In essence, Logistics Warehouse Automation with SJK Innovations represents the future of warehouse management, where advanced technologies converge to create a highly efficient, agile, and responsive supply chain ecosystem. By embracing automation, warehouses can unlock new levels of productivity, agility, and competitiveness in an increasingly demanding marketplace.
[SJK Innovations Robotic Palletizer](https://www.sjkinnovations.in/agri
) represents a leap forward in warehouse automation, offering a sophisticated solution for the efficient and precise palletization of goods. This cutting-edge robotic system combines state-of-the-art technology with advanced robotics to streamline palletizing operations, optimize space utilization, and enhance overall warehouse efficiency.
At the heart of the SJK Innovations Robotic Palletizer is a fleet of intelligent robotic arms equipped with advanced sensors and precision control systems. These robotic arms are meticulously engineered to handle a wide range of products with utmost care and accuracy, from boxes and cartons to bags and containers, regardless of size, shape, or weight.
The versatility of the [SJK Innovations Robotic Palletizer](https://www.sjkinnovations.in/agri
) allows it to adapt to various palletizing configurations, including single SKU, mixed SKU, and layer-based palletizing. Its intuitive interface and user-friendly programming enable easy customization of pallet patterns, stacking sequences, and layer orientations, ensuring optimal pallet stability and load integrity.
One of the key advantages of the SJK Innovations Robotic Palletizer is its ability to palletize goods at high speeds while maintaining precision and consistency. By automating the palletizing process, warehouses can significantly increase throughput, reduce manual labor costs, and minimize the risk of repetitive strain injuries associated with manual palletizing.
Moreover, the compact footprint of the SJK Innovations Robotic Palletizer makes it an ideal solution for warehouses with limited space constraints. Its modular design allows for seamless integration into existing warehouse layouts, minimizing disruption to ongoing operations and maximizing floor space utilization.
Built upon a foundation of reliability and durability, the SJK Innovations Robotic Palletizer is engineered to withstand the rigors of continuous operation in demanding warehouse environments. With robust construction and industry-leading components, it delivers unparalleled performance and uptime, ensuring maximum return on investment for warehouse operators.
In summary, [SJK Innovations Robotic Palletizer](https://www.sjkinnovations.in/agri
) sets a new standard for palletizing efficiency, accuracy, and reliability in the warehouse automation industry. By harnessing the power of robotics, it empowers warehouses to optimize their palletizing processes, enhance operational efficiency, and stay ahead in today's competitive marketplace.
| sjk_innovations | |
1,867,318 | The Hilarious Guide to Career Sabotage | Welcome to the ultimate guide on how to suck as a junior developer! If you're a new developer looking... | 0 | 2024-05-28T07:33:04 | https://dev.to/mitchiemt11/the-hilarious-guide-to-career-sabotage-3c0g | webdev, developer, beginners, programming | Welcome to the ultimate guide on **how to suck as a junior developer**! If you're a new developer looking to make every rookie mistake in the book, you've come to the right place 😉. This guide will walk you through the mistakes made by junior devs, all wrapped in a humorous package. So, get ready!!
-----------------------
**1. Skip the Documentation**
Why read the manual when you can dive right in and figure it out yourself? As a junior developer, it's your duty to skip all documentation and try to reinvent the wheel every time. Who needs clear instructions when you can fumble your way through hours of frustration?
_**Pro Tip:**_ Be sure to ignore any README files, comments, or helpful tips your team might provide. Real developers work in the dark!
**2. Ignore Version Control**
Version control systems like Git are for those who want to keep track of their code changes. But you're a maverick! Who needs branches, commits, or even a backup plan? Just keep coding in one file and overwrite your progress daily. Living on the edge, right?
_**Pro Tip:**_ Make sure to push directly to the main branch with untested, unfinished code. Your teammates will love the excitement of unexpected bugs in production.
**3. Avoid Asking for Help**
Asking for help is a sign of weakness. If you want to suck as a junior developer, make sure you struggle alone. Spend hours or even days stuck on a problem rather than reaching out to your team or Googling the solution. Suffering builds character!
_**Pro Tip:**_ When you finally do ask for help, do it in the vaguest way possible. "It's not working" is a perfectly acceptable description of your problem.
**4. Write Cryptic Code**
Clear, readable code is overrated. Your goal should be to write the most confusing, cryptic code possible. Use single-letter variable names, avoid comments, and make sure your functions do fifty different things. Future you (and your colleagues) will appreciate the mystery.If anyone complains about your code quality, just tell them it's "self-documenting." Problem solved!
**5. Neglect Testing**
Testing is for the paranoid. As a junior developer aiming to suck, you should trust that your code works perfectly on the first try. Skip writing unit tests, integration tests, or any kind of tests. Real developers test in production! When bugs inevitably arise, just blame the environment or someone else's code. Denial is a powerful tool.
**6. Overcomplicate Everything**
Why write simple, elegant solutions when you can create overly complex monstrosities? Always choose the most convoluted approach to every problem. Remember, the more lines of code, the better!
_**Pro Tip**:_ Throw in some unnecessary design patterns and over-engineer your code. Bonus points if you can make it impossible for anyone else to understand or maintain.
**7. Procrastinate on Learning**
The tech world moves fast, but that doesn't mean you have to. Put off learning new technologies, frameworks, or best practices. Stick to what you know (even if it’s outdated), and avoid any professional development opportunities. When asked about new trends or tools, just shrug and say, "I'll get to it eventually."
## Final Tips:
**The Advice: How Not to Suck**
_Alright, enough. Here’s some serious advice to help you avoid the common pitfalls and succeed as a junior developer:_
**Read Documentation:** Take the time to understand the tools and frameworks you’re using. Documentation is your friend.
Use Version Control: Learn Git (or any other version control system) properly. Commit often and understand branching strategies.
**Ask for Help:** Don’t be afraid to reach out to your team or online communities. Asking questions is how you learn.
**Write Readable Code:** Follow best practices for naming conventions and code organization. Comments and clean code are your allies.
**Test Your Code:** Write tests to ensure your code works as expected and can be maintained. Tests save you from future headaches.
**Simplify:** Aim for simplicity and clarity in your solutions. Overcomplicating things can lead to more bugs and maintenance issues.
**Keep Learning:** Stay curious and keep up with industry trends and new technologies. Continuous learning is key to staying relevant.
**Communicate Clearly:** Effective communication with your team is crucial. Share your progress, ask questions, and provide updates regularly.
**Embrace Feedback:** Be open to constructive criticism. Feedback helps you grow and improve your skills.
**Take Breaks:** Avoid burnout by taking regular breaks. A well-rested mind is more productive and creative.
_Remember, everyone makes mistakes when starting out. The key is to learn from them and continuously improve._
Until next time!....
| mitchiemt11 |
1,867,317 | Acrylic Keychains: A Blend of Functionality and Personalization | Aesthetic Appeal The visual appeal of acrylic keychains is undeniable. The material's clarity and... | 0 | 2024-05-28T07:30:54 | https://dev.to/softwareindustrie24334/acrylic-keychains-a-blend-of-functionality-and-personalization-48hk | Aesthetic Appeal
The visual appeal of acrylic keychains is undeniable. The material's clarity and ability to be vividly colored means that designs can be bright, bold, and eye-catching. Whether used as a fashion statement, a collectible item, or a simple accessory, acrylic keychains can be both functional and fashionable. They often feature vibrant colors and glossy finishes that attract attention and add a touch of personality to everyday items like keys, bags, and lanyards.
Cost-Effectiveness
Another advantage of acrylic keychains is their cost-effectiveness. Despite their high-quality appearance and durability, acrylic keychains are relatively inexpensive to produce, especially when ordered in bulk. This makes them an economical choice for businesses looking for promotional items or for events like parties, conferences, and trade shows where souvenirs are handed out. The affordability, combined with the customizability, allows for large-scale production without compromising on quality or design.
https://ysogift.com/products/custom-clear-acrylic-keychains | softwareindustrie24334 | |
1,867,316 | SJK Innovations warehouse conveyor automation | In the dynamic landscape of modern logistics, efficiency and precision are paramount. Logistics... | 0 | 2024-05-28T07:30:37 | https://dev.to/sjk_innovations/sjk-innovations-warehouse-conveyor-automation-3n7f | In the dynamic landscape of modern logistics, efficiency and precision are paramount. Logistics Warehouse Automation with SJK (Sensory, Junctional, and Kinetic technologies) represents the cutting-edge integration of advanced technological solutions into warehouse operations, revolutionizing the way goods are stored, retrieved, and distributed.
[Logistics Warehouse Automation with SJK](https://www.sjkinnovations.in/warehouse
) encompasses a holistic approach to warehouse automation, combining sensory technologies for real-time data acquisition, junctional systems for seamless integration of various processes, and kinetic solutions for optimized movement and handling of goods.
At its core, Logistics Warehouse Automation with SJK optimizes every aspect of warehouse management, from inventory tracking and replenishment to order fulfillment and shipping. Sensory technologies such as RFID, barcode scanning, and IoT sensors provide granular visibility into inventory levels and locations, enabling precise inventory management and minimizing stockouts.
Junctional systems serve as the nerve center of warehouse operations, seamlessly integrating different automation modules, warehouse management systems (WMS), and enterprise resource planning (ERP) systems into a cohesive ecosystem. This integration ensures streamlined communication and data flow across the warehouse, eliminating silos and bottlenecks.
Kinetic technologies, including automated guided vehicles (AGVs), robotic arms, and conveyor systems, automate repetitive tasks such as picking, packing, and palletizing, boosting operational efficiency and reducing labor costs. These technologies work in concert with intelligent algorithms and machine learning algorithms to optimize workflow, adapt to changing demand patterns, and maximize throughput.
The benefits of [Logistics Warehouse Automation with SJK](https://www.sjkinnovations.in/warehouse
) are manifold. It enhances accuracy and order fulfillment rates, reduces operational errors, and increases the speed of order processing. By automating labor-intensive tasks, it frees up human resources to focus on more value-added activities, such as quality control and customer service.
Moreover, Logistics Warehouse Automation with SJK enhances scalability and flexibility, allowing warehouses to adapt to fluctuating demand and seasonal peaks without significant overhead. With its modular architecture, it can be customized to suit the specific needs and requirements of any warehouse, regardless of size or industry vertical.
| sjk_innovations | |
1,867,313 | SJK Innovations material handling solution for warehouse | Optimizing Logistics Operations with SJK Warehouse Automation In today's fast-paced world, efficiency... | 0 | 2024-05-28T07:28:00 | https://dev.to/sjk_innovations/sjk-innovations-material-handling-solution-for-warehouse-59mc | automation, productivity | Optimizing Logistics Operations with SJK Warehouse Automation
In today's fast-paced world, efficiency is key to staying ahead in the logistics industry. Introducing [SJK Warehouse Automation](https://www.sjkinnovations.in/), a cutting-edge solution revolutionizing warehouse management. SJK, standing for Sorting, Jacking, and Kitting, embodies the core functionalities driving this state-of-the-art system.
Sorting: SJK Warehouse Automation streamlines the sorting process with advanced algorithms and robotic precision. By intelligently categorizing incoming inventory, SJK minimizes handling time and errors, ensuring swift and accurate placement of goods within the warehouse.
Jacking: Efficient movement of goods within the warehouse is essential for timely order fulfillment. SJK's jacking system utilizes automated guided vehicles (AGVs) and smart routing algorithms to transport items seamlessly. From receiving docks to storage locations, SJK optimizes every step of the journey, reducing labor costs and increasing throughput.
Kitting: Customized orders are a hallmark of modern logistics, presenting unique challenges in warehouse management. SJK's kitting capabilities enable the assembly of diverse product configurations with unmatched speed and precision. Whether it's creating custom packages or assembling components for manufacturing, SJK ensures flexibility without sacrificing efficiency.
Benefits of [SJK Warehouse Automation](https://www.sjkinnovations.in/):
• Increased Efficiency: By automating repetitive tasks, SJK minimizes operational bottlenecks and accelerates order processing, allowing logistics companies to meet growing demand without compromising on quality.
• Enhanced Accuracy: With precise sorting and tracking capabilities, SJK reduces the likelihood of errors and discrepancies, ensuring that customers receive the right products on time, every time.
• Cost Savings: By optimizing resource utilization and minimizing manual labor requirements, SJK Warehouse Automation delivers significant cost savings over traditional warehouse management methods, improving the bottom line for logistics providers.
• Scalability: SJK's modular design allows for seamless scalability, making it suitable for warehouses of all sizes and configurations. Whether it's a small distribution center or a large-scale fulfillment operation, SJK adapts to evolving business needs with ease.
Conclusion: In an era defined by rapid technological advancement, [SJK Warehouse Automation](https://www.sjkinnovations.in/) stands at the forefront of innovation in logistics. By combining state-of-the-art sorting, jacking, and kitting capabilities, SJK empowers warehouses to operate with unparalleled efficiency, accuracy, and scalability, driving success in today's competitive marketplace. Unlock the full potential of your logistics operations with SJK Warehouse Automation.
| sjk_innovations |
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| allbetgaming |
1,867,309 | after deployment in live server, 404 error occurs on refresh of urls | -> i made an admin dashboard in React and built it for production -> but after i build, the... | 0 | 2024-05-28T07:23:07 | https://dev.to/purnimashrestha/after-deployment-in-live-server-404-error-occurs-on-refresh-of-urls-1ad | -> i made an admin dashboard in React and built it for production
-> but after i build, the problem is that when I navigate to another page and hit refresh, an error occurs saying Cannot GET /login
-> after deployment in live server(using Filezilla), 404 error occurs on refresh of URLs
URL: [https://demo.templatesjungle.com/admin/](https://demo.templatesjungle.com/admin/)
I think the problem is this:
it's probably because i've built an SPA and haven't set up any redirects in your host
You'll need to redirect every route on your server back to `/` for an SPA to work.
what do I do? How do I do this?
app.js:
navigates.jsx:
| purnimashrestha | |
1,867,308 | Bambina Blue | For an unforgettable ice cream experience, head over to Bambina Blue, the top spot for ice cream nyc.... | 0 | 2024-05-28T07:22:58 | https://dev.to/voidspirit/bambina-blue-348j | For an unforgettable ice cream experience, head over to Bambina Blue, the top spot for [ice cream nyc](https://bambinablue.com/). Our handcrafted creations are made with love and the finest ingredients, ensuring every bite is a delight. From rich and creamy classics to innovative new flavors, Bambina Blue is the perfect place to treat yourself. | voidspirit | |
1,867,307 | Charting History: Free Resources for Historical Exchange Rates | In the vast landscape of finance and economics, historical exchange rates serve as the bedrock upon... | 0 | 2024-05-28T07:22:44 | https://dev.to/martinbaldwin127/charting-history-free-resources-for-historical-exchange-rates-4ica | freehistoricalexchangerates | In the vast landscape of finance and economics, historical exchange rates serve as the bedrock upon which much analysis and decision-making are built. They offer a window into the past, shedding light on trends, patterns, and pivotal moments that have shaped the global economy. However, accessing reliable free **[historical exchange rates](https://fixer.io/)** data has historically been a challenge, often requiring costly subscriptions or specialized databases. But fear not, as in today's digital age, an array of free resources have emerged, democratizing access to this invaluable information. In this article, we will explore these resources, equipping you with the tools to chart history and glean insights into the ever-evolving world of currency exchange.
**Why Historical Exchange Rates Matter**
Before delving into the resources themselves, let's first underscore the significance of historical exchange rates. Understanding past currency fluctuations enables economists, analysts, businesses, and investors to:
**Evaluate Economic Performance:** Historical exchange rates offer a lens through which to assess a country's economic health over time. Fluctuations in currency value can reflect shifts in trade balances, inflation rates, and monetary policies.
**Inform Investment Decisions:** Investors rely on historical exchange rate data to gauge the performance of currencies and make informed decisions about international investments. By analyzing past trends, they can anticipate future movements and mitigate risk.
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Given the pivotal role historical exchange rates play in economic analysis and decision-making, the availability of free resources is a boon to professionals and enthusiasts alike.
**Free Resources for Historical Exchange Rates**
Now, let's explore some of the top free resources for accessing historical exchange rate data:
**Central Bank Websites:** Many central banks provide historical exchange rate data on their websites. These institutions offer reliable and comprehensive data covering various currencies and time periods. Examples include the Federal Reserve Economic Data (FRED) provided by the Federal Reserve Bank of St. Louis and the European Central Bank's Statistical Data Warehouse.
**Financial Websites and Platforms:** Several financial websites and platforms offer historical exchange rate data as part of their services. Websites like Yahoo Finance, Investing.com, and XE.com provide access to historical exchange rates, customizable charts, and analysis tools, all free of charge.
**Government Agencies:** Government agencies, such as the U.S. Bureau of Labor Statistics and the UK Office for National Statistics, often publish historical exchange rate data as part of their economic indicators and statistical reports. These datasets are typically reliable and publicly available, making them valuable resources for researchers and analysts.
**Academic Institutions:** Many academic institutions maintain databases of historical exchange rate data for research purposes. While access to these databases may require registration or affiliation with the institution, they often provide robust datasets and analytical tools for free or at a nominal cost.
**Open Data Platforms:** Open data platforms, such as Data.gov and the World Bank's Open Data initiative, host a wealth of publicly accessible datasets, including historical exchange rate data. These platforms promote transparency, collaboration, and innovation by making data freely available to the public.
By leveraging these free resources, individuals and organizations can unlock a treasure trove of historical exchange rate data, empowering them to conduct in-depth analysis, make informed decisions, and gain valuable insights into global economic trends.
**Conclusion**
In conclusion, historical exchange rates serve as a cornerstone of economic analysis and decision-making, offering invaluable insights into past trends and patterns. Thanks to the proliferation of free resources, accessing this critical data has never been easier. By utilizing central bank websites, financial platforms, government agencies, academic institutions, and open data platforms, individuals and organizations can chart history, unravel trends, and make informed decisions in today's dynamic economic landscape. So, dive into these resources, explore the data, and uncover the stories hidden within historical exchange rates. The past awaits your discovery. | martinbaldwin127 |
1,867,283 | ascii-based graphics: the only image file format for the terminal | hello, devs! i'm excited to show you all this tiny project i made in my free time!! it's... | 0 | 2024-05-28T07:20:17 | https://dev.to/b4d/ascii-based-graphics-the-only-image-file-format-for-the-terminal-4k61 | opensource, github, showdev, terminal | ## _hello, devs!_
i'm excited to show you all this tiny project i made in my free time!! it's nothing much, but it's the first project i've ever shared with the public. say hello to **_ascii-based-graphics!_**
this is a new file format that can be easily edited with a text editor (an ability that you don't have with pngs, jpegs, and most other image formats). it also has a text output using ansi escape codes to color the image, which brings images to the terminal!!
## example of abg in action
take a look at the image at the top of this post. that was made using abg. here is what it looks like in a text editor:
```abg
1.0.1
abg banner
xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx v2 v2 xx xx xx xx xx xx xx p4 xx xx xx xx v4 v4 v4 xx xx xx p4 xx xx v4 v4 xx
xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx v2 v2 v2 xx xx xx xx xx p4 xx xx xx xx xx xx v4 xx xx xx p4 xx xx xx v4
xx xx y4 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx v2 v2 xx xx xx xx p4 xx xx xx xx xx xx v4 xx xx p4 xx xx xx xx
xx xx y4 xx xx xx xx xx xx xx xx xx xx xx y4 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx v2 xx xx xx xx p4 p4 p4 xx xx xx xx v4 xx xx p4 p4 xx xx
xx y4 y4 y4 xx xx xx xx xx xx xx xx xx y4 y4 y4 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx v2 xx xx xx xx xx xx p4 xx xx xx v4 xx xx xx xx p4 p4
xx xx y4 xx xx xx xx xx xx xx xx xx xx xx y4 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx v2 xx xx xx xx xx xx p4 xx xx xx v4 xx xx xx xx xx
v2 xx y4 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx v2 v2 v2 v2 xx xx xx p4 xx xx xx v4 v4 xx xx xx
xx v2 v2 v2 v2 v2 y4 xx y4 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx w2 xx xx xx xx xx xx xx xx xx xx xx xx xx v2 xx xx p4 xx xx xx xx xx v4 v4 v4
xx xx xx xx xx xx v2 y4 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx w2 w4 w2 xx xx xx xx xx xx xx xx xx xx xx xx v2 xx xx xx p4 xx xx xx xx xx xx xx
xx xx xx xx xx xx y4 xx y4 xx xx xx xx xx xx xx xx xx xx w2 w2 w2 xx w2 w4 w2 w2 xx w2 w2 w2 xx xx xx xx xx xx xx xx v2 xx xx xx p4 p4 xx xx xx xx xx
p4 p4 p4 p4 p4 xx xx xx xx v2 xx xx xx xx xx xx xx xx w2 w4 w4 w4 w2 w2 w4 w4 w4 w2 w4 w4 w4 w2 xx xx xx xx xx xx xx xx v2 xx xx xx xx p4 p4 p4 p4 p4
xx xx xx xx xx p4 p4 xx xx xx v2 xx xx xx xx xx xx xx w2 w4 w2 w4 w2 w2 w4 w2 w4 w2 w4 w2 w4 w2 xx xx xx xx xx xx xx xx xx v2 xx xx xx xx xx xx xx xx
xx xx xx xx xx xx xx p4 xx xx xx v2 xx xx xx xx xx xx w2 w4 w4 w4 w4 w2 w4 w4 w4 w2 w4 w4 w4 w2 xx xx xx xx xx xx xx xx xx xx v2 v2 xx xx xx xx xx xx
v4 v4 v4 xx xx xx xx xx p4 xx xx v2 xx xx xx xx xx xx xx w2 w2 w2 w2 xx w2 w2 w2 xx w2 w2 w4 w2 xx xx xx xx y4 xx xx xx xx xx xx xx v2 v2 v2 v2 v2 xx
xx xx xx v4 v4 xx xx xx p4 xx xx xx v2 v2 v2 v2 xx xx xx xx y4 xx y4 xx y4 xx y4 w2 w4 w4 w4 w2 xx xx xx xx y4 xx xx xx xx xx xx xx xx xx xx xx xx v2
xx xx xx xx xx v4 xx xx xx p4 xx xx xx xx xx xx v2 xx xx y4 xx y4 xx y4 xx y4 xx y4 w2 y4 w2 xx xx xx xx y4 y4 y4 xx xx xx xx xx xx xx xx xx xx xx xx
p4 p4 xx xx xx xx v4 xx xx xx p4 xx xx xx xx xx xx v2 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx y4 xx xx xx xx xx xx xx xx xx xx xx xx xx
xx xx p4 p4 xx xx v4 xx xx xx xx p4 p4 p4 xx xx xx xx v2 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx y4 xx xx xx xx xx y4 xx y4 xx xx xx xx xx
xx xx xx xx p4 xx xx v4 xx xx xx xx xx xx p4 p4 xx xx xx v2 v2 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx y4 xx xx xx xx xx xx
v4 xx xx xx p4 xx xx xx v4 xx xx xx xx xx xx xx p4 xx xx xx xx v2 v2 v2 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx y4 xx y4 xx xx xx xx xx
xx v4 v4 xx xx p4 xx xx xx v4 v4 v4 xx xx xx xx xx p4 xx xx xx xx xx xx v2 v2 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
```
if you don't know how to read it, this may look like chaos. however, this makes a lot more sense than you may first realize.
## dissecting an abg file
the first line is the version of abg this file uses. this is because abg is subject to change in the future. the second line serves no purpose to the interpreter, so it could be a description of the image. every line after this is the actual image. the first letter of every pixel is the color. in version 1.0.0:
- `r` = red
- `y` = yellow
- `g` = green
- `b` = blue
- `v` = cyan
- `p` = purple
- `w` = white
- `x` = transparent
the second character is the brightness.
- `1` = black
- `2` = very dark
- `3` = little darker
- `4` = bright
- `x` = transparent
## limitations
abg only allows for 20 possible colors (a mere 7% of the atari's 256), but this number will never increase. this is because of the number of ansi escape codes that exist. yes, it's sad, but there's nothing i can do :'(
## future updates
in the future, i plan on branching away from just pixels, and into more commonly used characters used to make art (such as `/`, `,`, `|`, etc.)
## thanks!
thanks for reading my article! i don't know if anybody'll use this, ever, but it was fun to make!! :) have a great rest of your day, devs!!
## repository
{% embed https://github.com/qwertyy-dev/abg %} | b4d |
1,867,282 | Empire City Casino Player Wins $1M on Slot for Early Holiday Gift | This week, a Yonkers, N.Y., man won more than $1 million at Empire City Casino by MGM Reso,rts,... | 0 | 2024-05-28T07:18:36 | https://dev.to/luejhielopez/empire-city-casino-player-wins-1m-on-slot-for-early-holiday-gift-1mk | This week, a Yonkers, N.Y., man won more than $1 million at Empire City Casino by MGM Reso,rts, according to a news report. It’s the biggest slot jackpot at the casino so far this year and is believed to be the biggest slot jackpot at the gaming property in about three years, Patch reported.
The player won $1,088,271 after placing a $10 bet at the Yonkers casino, Patch said. The bet was made on the Wheel of Fortune Triple Stars slot machine, manufactured by International Game Technology (IGT).
The winner was identified by the casino simply as “Leo R.” Leo, who works in the transportation sector, was on his way to work when he stopped at the casino.
Leo says he plans to use some of the money to invest in real estate.
$925K Win
A few weeks earlier, a player named “Walter” hit the jackpot for $925,488 at the same casino. He was also playing on an IGT Wheel of Fortune Triple Stars slot machine where he wagered $20.
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Earlier Empire City Jackpots
Domingo added that other players at the Empire City casino have won high jackpots in recent years.
For instance, Domingo Rodriguez of the Bronx, N.Y., won $1.062 million in July 2021.
A woman known as “Theresa P.” of Ossining, N.Y., won $2,919,162.91. She won another jackpot of $1,469,368.28 shortly after her nearly $3 million jackpot.
Other big winners include Linda P. of Connecticut, who won $1,514,634.15. Howard G. of Long Island, N.Y., won $1,473,503, while Linda H. of Thornwood, N.Y., won $961,411.
In addition, a Hartsdale, N.Y., resident recently won a 2022 Chevrolet Silverado worth more than $50K. The prize was part of the casino’s promotion, “250,000 October Trunk or Treat.”
| luejhielopez | |
1,867,276 | Mastering Hollow Patterns: A Comprehensive Guide with Code Examples | Welcome to our comprehensive guide on creating various hollow patterns using loops in C programming!... | 0 | 2024-05-28T07:07:39 | https://dev.to/jitheshpoojari/mastering-hollow-patterns-a-comprehensive-guide-with-code-examples-38pc | c, coding, tutorial, beginners | Welcome to our comprehensive guide on creating various hollow patterns using loops in C programming! In this tutorial, we'll walk through step-by-step instructions on how to draw 18 different hollow patterns. These patterns range from basic shapes like squares and triangles to more complex forms like diamonds, hexagons, and pentagons. Each pattern is created using nested loops, making it an excellent exercise for beginners to practice control structures in C. Let's dive in!
You can find all the code in our [GitHub repository](https://github.com/jithesh-poojari/c-programs/blob/main/hollow-patterns.c).
### Table of Contents
1. [Introduction to Nested Loops](#introduction-to-nested-loops)
2. [Hollow Square](#hollow-square)
3. [Hollow Right Triangle](#hollow-right-triangle)
4. [Hollow Inverted Right Triangle](#hollow-inverted-right-triangle)
5. [Hollow Right Aligned Triangle](#hollow-right-aligned-triangle)
6. [Hollow Right Aligned Inverted Triangle](#hollow-right-aligned-inverted-triangle)
7. [Hollow Right Pascal Triangle](#hollow-right-pascal-triangle)
8. [Hollow Left Pascal Triangle](#hollow-left-pascal-triangle)
9. [Hollow Equilateral Triangle](#hollow-equilateral-triangle)
10. [Hollow Inverted Equilateral Triangle](#hollow-inverted-equilateral-triangle)
11. [Hollow Pyramid](#hollow-pyramid)
12. [Hollow Inverted Pyramid](#hollow-inverted-pyramid)
13. [Hollow Diamond](#hollow-diamond)
14. [Hollow Hourglass](#hollow-hourglass)
15. [Hollow Rhombus](#hollow-rhombus)
16. [Hollow Parallelogram](#hollow-parallelogram)
17. [Hollow Hexagon](#hollow-hexagon)
18. [Hollow Pentagon](#hollow-pentagon)
19. [Hollow Inverted Pentagon](#hollow-inverted-pentagon)
20. [Conclusion](#conclusion)
### Introduction to Nested Loops
Before we start with the patterns, it’s essential to understand the concept of nested loops. A nested loop is a loop inside another loop. This structure is particularly useful for handling multi-dimensional arrays and for generating patterns. In C, a typical nested loop structure looks like this:
```c
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
// Code to execute
}
}
```
### Hollow Square
**Explanation:**
- The hollow square pattern consists of `n` rows and `n` columns.
- Characters are printed only at the borders (first row, last row, first column, and last column).
```c
int n = 5; // size of the square
char ch = '*';
printf("1. Hollow Square:\n");
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
if (i == 0 || i == n - 1 || j == 0 || j == n - 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
* * * * *
* *
* *
* *
* * * * *
```
### Hollow Right Triangle
**Explanation:**
- The hollow right triangle pattern starts with one character in the first row and increases by one character in each subsequent row.
- Characters are printed only at the borders (first row, last row, and the diagonal).
```c
printf("2. Hollow Right Triangle:\n");
for (int i = 0; i < n; i++) {
for (int j = 0; j < i + 1; j++) {
if (i == n - 1 || j == 0 || j == i) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
*
* *
* *
* *
* * * * *
```
### Hollow Inverted Right Triangle
**Explanation:**
- The hollow inverted right triangle pattern starts with `n` characters in the first row and decreases by one character in each subsequent row.
- Characters are printed only at the borders (first row, last row, and the diagonal).
```c
printf("3. Hollow Inverted Right Triangle:\n");
for (int i = 0; i < n; i++) {
for (int j = n; j > i; j--) {
if (i == 0 || j == n || j == i + 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
* * * * *
* *
* *
* *
*
```
### Hollow Right Aligned Triangle
**Explanation:**
- The hollow right aligned triangle pattern is similar to the hollow right triangle, but the triangle is right-aligned.
- Characters are printed only at the borders (first row, last row, and the diagonal).
```c
printf("4. Hollow Right Aligned Triangle:\n");
for (int i = 0; i < n; i++) {
for (int j = n - 1; j > i; j--) {
printf(" ");
}
for (int j = 0; j < i + 1; j++) {
if (i == n - 1 || j == 0 || j == i) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
*
* *
* *
* *
* * * * *
```
### Hollow Right Aligned Inverted Triangle
**Explanation:**
- The hollow right aligned inverted triangle pattern is the opposite of the hollow right aligned triangle.
- It starts with `n` characters in the first row and decreases by one character in each subsequent row, but the triangle is right-aligned.
```c
printf("5. Hollow Right Aligned Inverted Triangle:\n");
for (int i = 0; i < n; i++) {
for (int j = 1; j < i + 1; j++) {
printf(" ");
}
for (int j = n; j > i; j--) {
if (i == 0 || j == n || j == i + 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
* * * * *
* *
* *
* *
*
```
### Hollow Right Pascal Triangle
**Explanation:**
- The hollow right Pascal triangle pattern combines the right triangle and the inverted right triangle to form a Pascal-like triangle.
- Characters are printed only at the borders (first row, last row, and the diagonals).
```c
printf("6. Hollow Right Pascal Triangle:\n");
for (int i = 0; i < n; i++) {
for (int j = 0; j < i + 1; j++) {
if (j == 0 || j == i) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
for (int i = 0; i < n; i++) {
for (int j = n; j > i + 1; j--) {
if (j == n || j == i + 2) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
*
* *
* *
* *
* *
* *
* *
* *
*
```
### Hollow Left Pascal Triangle
**Explanation:**
- The hollow left Pascal triangle pattern is similar to the hollow right Pascal triangle, but it is left-aligned.
- Characters are printed only at the borders (first row, last row, and the diagonals).
```c
printf("7. Hollow Left Pascal Triangle:\n");
for (int i = 0; i < n; i++) {
for (int j = n - 1; j > i; j--) {
printf(" ");
}
for (int j = 0; j < i + 1; j++) {
if (j == 0 || j == i) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < i + 1; j++) {
printf(" ");
}
for (int j = n - 1; j > i; j--) {
if (j == n
- 1 || j == i + 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
*
* *
* *
* *
* *
* *
* *
* *
*
```
### Hollow Equilateral Triangle
**Explanation:**
- The hollow equilateral triangle pattern is symmetrical and centered.
- Characters are printed only at the borders (first row, last row, and the diagonals).
```c
printf("8. Hollow Equilateral Triangle:\n");
for (int i = 0; i < n; i++) {
for (int j = n - 1; j > i; j--) {
printf(" ");
}
for (int j = 0; j < 2 * i + 1; j++) {
if (j == 0 || j == 2 * i || i == n - 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
*
* *
* *
* *
* * * * * * * * *
```
### Hollow Inverted Equilateral Triangle
**Explanation:**
- The hollow inverted equilateral triangle pattern is the opposite of the hollow equilateral triangle.
- Characters are printed only at the borders (first row, last row, and the diagonals).
```c
printf("9. Hollow Inverted Equilateral Triangle:\n");
for (int i = 0; i < n; i++) {
for (int j = 0; j < i; j++) {
printf(" ");
}
for (int j = 2 * n - 1; j > 2 * i; j--) {
if (j == 2 * n - 1 || j == 2 * i + 1 || i == 0) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
* * * * * * * * *
* *
* *
* *
*
```
### Hollow Pyramid
**Explanation:**
- The hollow pyramid pattern is centered and symmetrical.
- Characters are printed only at the borders (first row, last row, and the diagonals).
```c
printf("10. Hollow Pyramid:\n");
for (i = 0; i < n; i++) {
for (j = n - 1; j > i; j--) {
printf(" ");
}
for (j = 0; j < (2 * i + 1); j++) {
if (i == n - 1 || j == 0 || j == i * 2 ) {
printf("%c", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
*
* *
* *
* *
*********
```
### Hollow Inverted Pyramid
**Explanation:**
- The hollow inverted pyramid pattern is the opposite of the hollow pyramid.
- Characters are printed only at the borders (first row, last row, and the diagonals).
```c
printf("11. Hollow Inverted Pyramid:\n");
for (i = n; i > 0; i--) {
for (j = n - i; j > 0; j--) {
printf(" ");
}
for (j = 0; j < (2 * i - 1); j++) {
if (j == 0 || i == n || j == (i-1) * 2 ) {
printf("%c", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
*********
* *
* *
* *
*
```
### Hollow Diamond
**Explanation:**
- The hollow diamond pattern is symmetrical and centered.
- It consists of a hollow upper and lower triangle.
```c
printf("12. Hollow Diamond:\n");
for (i = 0; i < n; i++) {
for (j = n - 1; j > i; j--) {
printf(" ");
}
for (j = 0; j < i + 1; j++) {
if (j == 0 || j == i) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
for (i = 0; i < n; i++) {
for (j = 0; j < i + 1; j++) {
printf(" ");
}
for (j = n - 1; j > i; j--) {
if (j == n - 1 || j == i + 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
*
* *
* *
* *
* *
* *
* *
* *
*
```
### Hollow Hourglass
**Explanation:**
- The hollow hourglass pattern is symmetrical and centered.
- It consists of a hollow upper and lower inverted triangle.
```c
printf("13. Hollow Hourglass:\n");
for (i = 0; i < n; i++) {
for (j = 0; j < i; j++) {
printf(" ");
}
for (j = 0; j < (n - i) ; j++) {
if (j == 0 || i == 0 || j == n - i - 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
for (i = 1; i < n; i++) {
for (j = n - 1; j > i; j--) {
printf(" ");
}
for (j = 0; j < (i + 1); j++) {
if (i == n - 1 || j == 0 || j == i) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
* * * * *
* *
* *
* *
*
* *
* *
* *
* * * * *
```
### Hollow Rhombus
**Explanation:**
- The hollow rhombus pattern is symmetrical and centered.
- Characters are printed only at the borders.
```c
printf("14. Hollow Rhombus:\n");
for (int i = 0; i < n; i++) {
for (int j = n - 1; j > i; j--) {
printf(" ");
}
for (int j = 0; j < n; j++) {
if (i == 0 || i == n - 1 || j == 0 || j == n - 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
* * * * *
* *
* *
* *
* * * * *
```
### Hollow Parallelogram
**Explanation:**
- The hollow parallelogram pattern is symmetrical and slanted to one side.
- Characters are printed only at the borders.
```c
printf("15. Hollow Parallelogram:\n");
for (i = 0; i < n; i++) {
for (j = 0; j < i; j++) {
printf(" ");
}
for (j = 0; j < n * 2; j++) {
if (i == n - 1 || i == 0 || j == 0 || j == n * 2 - 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
* * * * * * * * * *
* *
* *
* *
* * * * * * * * * *
```
### Hollow Hexagon
**Explanation:**
- The hollow hexagon pattern consists of a combination of upper and lower triangles and a middle section.
- Characters are printed only at the borders.
```c
printf("16. Hollow Hexagon:\n");
for (i = 0; i < n / 2; i++) {
for (j = n / 2 - i; j > 0; j--) {
printf(" ");
}
for (j = 0; j < n + 1 * i; j++) {
if ( i == 0 || j == 0 || j == n * i) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
for (i = n / 2; i >= 0; i--) {
for (j = 0; j < n / 2 - i; j++) {
printf(" ");
}
for (j = 0; j < n + i; j++) {
if (i == n - 1 || i == 0 || j == 0 || j == n + i - 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
* * * * *
* *
* *
* *
* * * * *
```
### Hollow Pentagon
**Explanation:**
- The hollow pentagon pattern consists of an upper triangle and a lower rectangle.
- Characters are printed only at the borders.
```c
printf("17. Hollow Pentagon:\n");
for (i = 0; i < n+1; i++) {
for (j = n ; j > i; j--) {
printf(" ");
}
for (j = 0; j < (i + 1); j++) {
if ( j == 0 || i == 0 || j == i ) {
printf(" %c", ch);
} else {
printf(" ");
}
}
printf("\n");
}
for (i = n / 2; i >= 0; i--) {
for (j = 0; j < n / 2 - i; j++) {
printf(" ");
}
for (j = 0; j < n + i; j++) {
if (i == n - 1 || i == 0 || j == 0 || j == n + i - 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
*
* *
* *
* *
* *
* *
* *
* *
* * * * *
```
### Hollow Inverted Pentagon
**Explanation:**
- The hollow inverted pentagon pattern consists of an upper inverted triangle and a lower inverted rectangle.
- Characters are printed only at the borders.
```c
printf("18. Hollow Inverted Pentagon:\n");
for (int i = 0; i <= n / 2; i++) {
for (int j = 0; j < n / 2 - i; j++) {
printf(" ");
}
for (int j = 0; j < n + i; j++) {
if (i == n - 1 || i == 0 || j == 0 || j == n + i - 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
for (int i = n + 1; i > 0; i--) {
for (int j = n + 2; j > i; j--) {
printf(" ");
}
for (int j = 0; j < i; j++) {
if ( j == 0 || j == i - 1) {
printf("%c ", ch);
} else {
printf(" ");
}
}
printf("\n");
}
```
**Output:**
```
* * * * *
* *
* *
* *
* *
* *
* *
* *
*
```
### Conclusion
In conclusion, we have explored a variety of patterns using loops and conditional statements in C, each producing different geometric shapes and designs. These patterns include solid and hollow variants of squares, triangles, pyramids, diamonds, hourglasses, rhombuses, parallelograms, hexagons, and pentagons. Understanding and implementing these patterns helps to strengthen programming logic, loop constructs, and conditionals, which are fundamental concepts in computer science.
By practicing these patterns, you can enhance your problem-solving skills and improve your ability to visualize and implement complex patterns in code. These exercises also provide a solid foundation for more advanced programming tasks and algorithms. | jitheshpoojari |
1,867,277 | Create your portfolio with GitHub Pages | Having a portfolio can be a nice way to showcase your work and projects to the world. It can be a... | 0 | 2024-05-28T07:07:02 | https://10xdev.codeparrot.ai/create-your-portfolio-with-github-pages | portfolio, developer, githubpages, domain |
Having a portfolio can be a nice way to showcase your work and projects to the world. It can be a great way to show off your skills and experience to potential employers or clients. In this article, we will learn how to create a portfolio website using GitHub Pages from creating to deploying along with a custom domain.
## What is GitHub Pages?
GitHub Pages is a static site hosting service that allows you to host your website directly from your GitHub repository. It is a great way to host your personal, organization, or project pages directly from a GitHub repository.
## Prerequisites
Before we get started, you will need the following:
- A GitHub account
- A code editor
- A custom domain (optional)
## Step 1: Create a new repository
The first step is to create a new repository on GitHub. To do this, log in to your GitHub account and click on the "New" button in the top right corner of the screen. Give your repository a name, such as `portfolio`, and click on the "Create repository" button.
## Step 2: Creating the website
Start by creating a new folder on your computer to store your website files. You can name this folder `portfolio` or any other name you prefer. Open this folder in your code editor and create an `index.html` file in it.
```bash
mkdir portfolio
cd portfolio
touch index.html
```
Next, add some content to the `index.html` file. You can use the following code as a starting point:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Portfolio</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<header>
<h1>Welcome to My Portfolio</h1>
</header>
<section>
<h2>About Me</h2>
<p>Introduce yourself here.</p>
</section>
<section>
<h2>Projects</h2>
<p>Showcase your projects here.</p>
</section>
</body>
</html>
```
Also, let's add some styling to the website by creating a `styles.css` file in the repository. Create a new file called `styles.css` and add the following code:
```css
body {
font-family: Arial, sans-serif;
margin: 0;
padding: 0;
background-color: #f4f4f4;
}
header {
background-color: #333;
color: white;
text-align: center;
padding: 1em 0;
}
section {
margin: 2em;
padding: 1em;
background-color: white;
border-radius: 5px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
```
This code creates a simple HTML file with a header, an about me section, and a projects section. It also links to a CSS file that styles the website. You can customize this code to add your own content and styling. Or you can use a template from a site like [HTML5 UP](https://html5up.net/) or [Start Bootstrap](https://startbootstrap.com/) to get started.
Or if you prefer to use a framework, you can do the same, and you can follow my article on [Deploying React App to GitHub Pages](https://10xdev.codeparrot.ai/deploying-react-apps-to-github-pages-with-github-actions) to deploy your React app to GitHub Pages.
We will also be configuring a custom domain for our portfolio which I have not covered in my previous article. If you're here to learn about custom domains, it will be covered in the next steps.
## Step 3: Commit and push your changes
Once you have created the `index.html` file, commit your changes to the `gh-pages` branch. You can do this by clicking on the "Commit changes" button and entering a commit message, such as "Add index.html file". Click on the "Commit changes" button to commit your changes.
```bash
git add .
git commit -m "Initial commit"
git remote add origin <repository-url>
git push -u origin main
```
## Step 4: Create a gh-pages branch
Next, create a new branch called `gh-pages` in your repository. You can do this by running the following command in your terminal:
```bash
git checkout -b gh-pages
git push origin gh-pages
```
## Step 5: Enable GitHub Pages
The next step is to enable GitHub Pages for your repository. To do this, go to the "Settings" tab of your repository and scroll down to the "GitHub Pages" section. Under "Source", select the `gh-pages` branch and click on the "Save" button.
## Step 6: Access your portfolio
Once you have enabled GitHub Pages, you can access your portfolio by going to `https://<username>.github.io/<repository>`, where `<username>` is your GitHub username and `<repository>` is the name of your repository. For example, if your username is `john` and your repository is `portfolio`, you can access your portfolio at `https://john.github.io/portfolio`.
And that's it! You have successfully created a portfolio website using GitHub Pages. You can now customize your website further by adding more content, styling, and features.
## Step 7: Configuring a custom domain
Sending out a GitHub Pages link is not very professional. You can configure a custom domain for your portfolio to make it look more professional.
The first step is to purchase a domain name from any domain registrar of your choice. Once you have purchased a domain name, you can configure it to point to your GitHub Pages website by following these steps:
I have purchased a domain `geniethetool.xyz` from [Namecheap](https://www.namecheap.com/). So I will be using this domain for the configuration.
- Go to the "Settings" tab of your repository and scroll down to the "GitHub Pages" section.
- Under "Custom domain", enter your custom domain name (e.g., `geniethetool.xyz` in my case) and click on the "Save" button.
After doing this, you should see a failed DNS configuration message. This is because we need to configure the DNS settings for our domain to point to GitHub Pages.
- Next, go to your domain registrar's website and log in to your account.
- Find the DNS settings for your domain and add the following A records:
```
185.199.108.153
185.199.109.153
185.199.110.153
185.199.111.153
```
These are the IP addresses for GitHub Pages. You can find the latest IP addresses on the [GitHub Docs](https://docs.github.com/en/pages/configuring-a-custom-domain-for-your-github-pages-site/managing-a-custom-domain-for-your-github-pages-site#configuring-an-apex-domain).
To create AAAA records for IPv6 addresses, you can use the following:
```
2606:50c0:8000::153
2606:50c0:8001::153
2606:50c0:8002::153
2606:50c0:8003::153
```
Also, let's add a CNAME record for the `www` subdomain:
The `www` subdomain should point to `<username>.github.io`, where `<username>` is your GitHub username. For example, if your username is `john`, the `www` subdomain should point to `john.github.io`.
Finally, these are the DNS records I added for my domain:
- Save the changes and wait for the DNS changes to propagate. This can take up to 24 hours.
- Once the DNS changes have propagated, you should see a success message in the "GitHub Pages" section of your repository settings.
Github pages also provides a SSL certificate for your custom domain. You can enable it by checking the "Enforce HTTPS" option in the "GitHub Pages" section.
Congratulations! You have successfully configured a custom domain for your portfolio website. You can now share your portfolio with the world using your custom domain. Now when you visit your custom domain, you should see something like this if you followed along:
As you can see, the custom domain `geniethetool.xyz` is now pointing to the GitHub Pages website. You can now share your portfolio with the world using your custom domain.
## Conclusion
In this article, we learned how to create a portfolio website using GitHub Pages from creating to deploying along with a custom domain. Having a portfolio can be a great way to showcase your work and projects to the world. I hope you found this article helpful and that you are now ready to create your own portfolio website. | harshalranjhani |
1,867,243 | Introduction to JWT and Cookie storage | Introduction In web development, knowing authorization and authentication mechanisms is... | 0 | 2024-05-28T07:02:29 | https://dev.to/strapi/introduction-to-jwt-and-cookie-storage-233m | jwt, cookies, strapi, javascript | ## Introduction
In web development, knowing authorization and authentication mechanisms is essential for developers to understand. The popular methods to handle this procedure are JSON Web Tokens (JWT) and cookie storage.
This post will review the definitions, structures, advantages, and disadvantages of JWT and cookie storage. Finally, we will compare the two to help you decide which is best for your project.
## What is a JWT?
A [JWT ](https://jwt.io/introduction)is a proposed standard for making data with a signature and/or encryption that holds JSON with claims. The tokens are signed using a secret (with the HMAC algorithm) or a public/private key using RSA or ECDSA.
**JWT Structure**
A well-compacted formed JSON Web Token consists of three concatenated Base64url-encoded strings, separated by dots (.):
The JWT Header: It contains metadata about the type of token and the cryptographic algorithms used to secure its contents. for example;
```
{
"alg": "HS256",
"typ": "JWT"
}
```
1. **The JWT payload**: The second part of the token is the payload, which contains the claims. Claims are statements about an entity (typically, the user) and additional data. There are three types of claims: registered, public, and private claims:
- **Registered claims**: These are a set of predefined claims which are not mandatory but recommended, to provide a set of useful, interoperable claims.
**- Public claims:** These can be defined at will by those using JWTs. To avoid collision they can be defined as a URL that contains a resistant namespace.
- **Private claims**: These are the custom claims created to share information between parties that agree on using them and are not registered as public claims.
for example, the payload could be like this;
```
{
"sub": "1234567890",
"name": "user",
"admin": true
}
```
2. **The JWT signature**: The signature is used to verify the message wasn't changed along the way, and, in the case of tokens signed with a private key, it can also verify that the sender of the JWT is who it says it is.
```
HMACSHA256(
base64UrlEncode(header) + "." +
base64UrlEncode(payload),
secret)
```
The output can be easily passed into an HTML or HTTP environment.
A typical JWT appears as follows:
`eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6ImV4YW1wbGVfdXNlciIsImlhdCI6MTUxNjIzOTAyMn0.eAuqcdegpATdo_fsYMBjJZAGi7hEa_Qba_RDvFnBKSI`
**Common uses for JWT**
Here are some scenarios where JSON Web Tokens are useful:
Information Exchange: Sending and receiving information securely between parties can be accomplished with JSON Web Tokens.
- **Authentication**: This is to identify users and restrict them via particular endpoint functions. if it's successful, the server will generate a JSON web token as a response to the client.
- **Authorization**: When a client logs in, a server that uses JWT for authorization will generate a JWT. Since this JWT has been signed, no other party may change it.
The main use of JWT is authentication. As long as valid users are still logged into their respective platforms and each API request doesn't demand continuous credential verification, users don't have to constantly verify their identities for every API call because services offer tokens with user data upon login.
The above image process is explained below;
1. The client requests authorization to the authorization server. This is always performed through different authorization flows.
2. When the authorization is granted, the authorization server returns a web token to the client's applications.
3. The application uses the web token to access protected resources or information (like an API).
## Code implementation
This section explains the code implementation of how to set JWT on your website. This can be done with several languages of your choice.
The code used here is for the PHP language.
```php
// Including the dependencies
require_once 'clients/autoload.php';
use \Firebase\JWT\JWT;
// Your secret key to sign the token
$secretKey = 'secret_key_here';
// Payload for the token, containing any data you want to include or share
$payload = array(
"user_id" => 123,
"username" => "example_user",
"exp" => time() + (60 * 60 * 24) // Expiration time, 1 day from now
);
// Generating the JWT to your clients
$token = JWT::encode($payload, $secretKey, 'HS256');
echo $token;
```
The above code is explained below
- `require_once 'clients/autoload.php';`: This line of code is to include the autoloader file from the installed dependencies which is the Firebase/JWT library.
- `use \Firebase\JWT\JWT;`: This line of code allows the import of the JWT class from the Firebase JWT library.
- `$secretKey = 'your_secret_key_here';`: This variable is to store the secret key used to sign JWT.
- `$payload = array(...);`: This array contains the claims you want to include in the JWT. This might include the above claims in the example or more. The exp claim is set for 24 which means the Token will expire in 24 hours.
```php
// Generating the JWT to your clients
$token = JWT::encode($payload, $secretKey, 'HS256');
```
- `$token = JWT::encode($payload, $secretKey, 'HS256');`: This line of code generates the Token using the encode method of the JWT class.
- `$payload`: The claims to be included.
- `$secretKey`: The secret key used to sign the JWT.
- `'HS256'`: This is the widely used and secure algorithm used for signing the JWT.
- `echo $token`: This code is to output the JWT generated to the screen which can be used for subsequent Authentication and data exchange.
> Debugger: Jwt.io
## JWT: Best Practices
In the Best practice, users should therefore heed to recommended guidelines that listed below:
1. Limited scope specifications that limit read/write rights to only those activities that are necessary
1. Removing old entries regularly reduces cumulative bloat
Implementing HTTPS requirements to prevent spying and eavesdropping
Putting in place strong anti-CSRF defences to strengthen defences against automated exploits.
## Advantages and Disadvantages of using JWT
We would look at the pros and cons of using JSON web tokens in your web application;
### Advantages of Using JWT
There are benefits to using JWTs.
1. **Stateless Authentication**: Stateless nature eliminating reliance upon central databases. This will enable the scaling and load balancing easier because the server does not have to keep track of the session status of each user
1. **Support**: Ease of implementation due to readily available libraries supporting diverse programming languages
1. **Authorization**: JWTs help servers decide who can do what, like user roles and permissions.
1. **Cross-Origin Resource Sharing (CORS)**: JWTs in HTTP headers make web apps communicate securely across different origins.
### Disadvantages of Using JWT
However, several downsides must be considered before adopting JWT fully:
1. **Cookie Size Factor**: This will cause an increase in the payload size, the size of JWT is larger than the session token and this may negatively impact system performance as a whole.
2. **Revocable Tokens**: Absence of revocation capabilities necessitates either short lifespans prone to frequent refreshes or employing external blacklist registries imposing extra infrastructure costs.
3. **Security risk**: It is vulnerable to XSS attacks unless adequately protected, especially given increased surface areas exposed via single-page applications (SPA).
4. **Limited Token Updates**: JWTs are usually unchangeable once issued. If a user's role or permissions change, they might have to log in again to get an updated token.
## What is Cookies storage?
In this section, we will understand what cookie storage is, how it works, and its types, including best practices.
This was introduced first by the Netscape Communications Corporation in 1994.
In every visit to some websites, sites serve "Set-Cookie" headers telling the user's or client browser to save given name-value pairs and optional features that indicate duration. This indicates how long a cookie can persist and under what condition it should be sent to the server. This action allows websites to track user's experiences, preferences, and sessions. In essence 'Set-Cookies' headers are the mechanism by which the website communicates with your browser.
[Cookies](https://en.wikipedia.org/wiki/HTTP_cookie) (also known as browser cookies, HTTP cookies or cookies) are small pieces of information sent back to the user's web browser. They are typically used for Authentication, tracking and personalization.
**Cookies storage** is a client-side storage where client data are stored.
> To view Cookies: F12 → 'Application' → 'Storage' → 'Cookies'
**Types of Cookies**
These are the primary types of cookies:
1. **Persistent cookies**: Are small text files that are stored on a user's computer or device by a website or web application, and they remain there even after the user has closed their web browser.
1. **Session cookies:** Track the user's behaviour on the website and help websites identify users browsing through the web pages of a website. The website analytics tool would consider each visit as a new session if it wasn't for session cookies.
1. **Authentication cookies**: Are created to help with user's session management when a person logs in with their browser. They ensure that sensitive information reaches the appropriate user sessions by associating user account information with a cookie-identifying string.
Cookies are convenient, but they come with **inherent hazards**:
That could lead to the leakage of sensitive data and unauthorized manipulation because it can be accessed by unauthorised parties. It's critical to understand authorization and authentication while developing and using cookie storage in any modern website.
It can also be used to track users' behaviours across multiple websites or web browsers, which can result in privacy concerns.
## Code Implementation
Also, cookies are code written by the developer to perform some functions on their webpage. Below we have a basic code written in Javascript for cookie storage;
```html
<!doctype html>
<html>
<head>
<script>
function setCookie(cname, cvalue, exdays) {
const d = new Date();
d.setTime(d.getTime() + exdays * 24 * 60 * 60 * 1000);
let expires = "expires=" + d.toUTCString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}
function getCookie(cname) {
let name = cname + "=";
let decodedCookie = decodeURIComponent(document.cookie);
let ca = decodedCookie.split(";");
for (let i = 0; i < ca.length; i++) {
let c = ca[i];
while (c.charAt(0) == " ") {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
function checkCookie() {
let user = getCookie("username");
if (user != "") {
alert("Welcome again " + user);
} else {
user = prompt("Please enter your name:", "");
if (user != "" && user != null) {
setCookie("username", user, 30);
}
}
}
</script>
</head>
<body onload="checkCookie()"></body>
</html>
```
The above code provides three `functions`:
1. `setCookie(cname,cvalue,exdays)`: This function sets a cookie by taking the name, the value and the number of days it will take to expire.
1. `getCookie(cname)`: This retrieves the value of a specific cookie if exists if not it returns empty.
1. `checkCookie()`: This will check if a cookie is set, if a cookie is set it displays a response set by the developer, if not, a prompt box might display asking for the name of the user and store the cookie according to the days set in setCookies function.
> **Note**: Modifications are allowed according to the information of the client you want to store or collect.
Below should be the result:
## Cookies Storage: Best practices
When using cookies on a website, there are best practices to follow that can help to ensure that they are used effectively.
- Don't store sensitive data in cookies, unless you have to.
- Give users the option to opt-out: Developers should give visitors the choice to refuse specific kinds of cookies, like those that are used for tracking or advertising. This can be done by giving the users customised options.
- Use secure cookies: Safeguarding important data, like login credentials, developers should use secure cookies. Secure cookies are always encrypted and can only be used with a secure connection (HTTPS).
- Provide clear cookies policy: The cookies policy should be explained and checked by the developer, so the users should know the type of cookies being used and they can opt out whenever they want to. check GDPR to know more about the cookies policy.
- Review and update cookie policy regularly
## Comparison of JWT and Cookies storage
Let's dive into the comparison between the JWT and Cookies storage, with this we will check out the similarities if there are any, and the differences, choosing between the two for authentication or authorization because both JWT and Cookies can be used for Authorization.
### Similarities between JWT and Cookies
Authorization are typically sent to the server via an HTTP Request Authorization Header (e.g. Bearer ). Can use Cookie too which is sent to the server in the Cookie request header.
JWT and cookies can be both used for authentication or authorization, A web cookie may be saved in the Cookies storage of your browser and may contain JWT. There are not many similarities between the two.
### JWT and cookies storage differences
Even when there may be similarities, there are also differences between JWT and cookie storage. There are several differences compared to the similarities. They rather have differences instead of similarities, below are a few explained differences between JWT and Cookies storage:
- **Revoking and invalidating**: Revoking a user session is easy with cookie, while it's harder to revoke or invalidate a user session in a JWT.
- **Simpler installation and maintenance**: Unlike JWT, cookies don't need extra setup or library installation, which makes them easier to
install and handle.
- **Storage**: JWT; the authentication state is not stored anywhere on the server side rather they are saved on the client side, while on the cookie, the authentication is stored on the server side.
- the JWT is **Stateless**, while the cookies are **Stateful**
### Choosing between JWT and Cookies storage
The best alternative option to choose mostly depends on the goals you want to achieve while keeping the targets' convenience, security, and effectiveness in check.
- **Advertisement**: If tracking users is the target for personal advertising cookies storage is the best option to go for as they can keep track of user's browser history or activities.
- **API Integration**: For API integration and resources, JWT performs better in authentication than cookies storage, it controls both the API and client by offering more protection and flexibility.
- **Data Storage**: Any data entered by users can be stored into a form on the website, either login credentials, shopping carts, form date, etc. while JWT cannot perform this functionality.
In choosing either JWT or cookies storage, functionality, needs, and target should be considered before concluding on what to use.
However, JWT can be stored inside Cookie. This method is safer because attackers won't be able to steal your user's token easily. It's also important to know that cookies are not immune to attacks, more security measures should be implemented for the overall security of the application.
## Conclusion
When choosing between JWTs and cookies to store authentication tokens, there are certain security tradeoffs to take into account, proper evaluation should also be considered. It also means that an attacker can access the user's account if a JWT or cookies are intercepted or stolen. | onisile_tobi |
1,867,275 | The Art of Writing Clean Code: Craft Clear and Maintainable Software | Introduction In the world of software development, clean code is like a well-written... | 0 | 2024-05-28T07:01:26 | https://dev.to/manavcodaty/the-art-of-writing-clean-code-craft-clear-and-maintainable-software-40jo | coding, cleancode, programming, softwaredevelopment | ## Introduction
---
In the world of software development, clean code is like a well-written piece of music. It's not just functional, it's beautiful and easy to understand. But what exactly is clean code, and why is it important?
## **Clean code is code that is:**
---
- **Readable:** Anyone, not just the original programmer, can easily understand what the code is doing.
- **Maintainable:** The code is easy to modify and update without introducing errors.
- **Efficient:** The code avoids unnecessary complexity and runs smoothly.
## **Why Write Clean Code?**
---
There are many benefits to writing clean code. Here are a few:
- **Saves time and money:** Clean code is easier to debug and fix, which saves developers time and money.
- **Reduces errors:** Clean code is less likely to contain errors, which leads to more stable and reliable software.
- **Improves collaboration:** Clean code makes it easier for developers to work together on projects.
## **Tips for Writing Clean Code:**
---
- **Use meaningful names:** Give variables and functions names that clearly describe what they do.
- **Write clear and concise comments:** Comments should explain the code's purpose, but not repeat what the code itself is doing.
- **Format your code consistently:** Use consistent indentation and spacing to make your code easier to read.
- **Break down complex code:** Large functions can be difficult to understand and maintain. Break them down into smaller, more manageable functions.
- **Follow coding standards:** Many programming languages have established coding standards. Following these standards can help improve the readability and maintainability of your code.
## **Conclusion**
---
Writing clean code is an art form that takes practice and discipline. However, the benefits of clean code are well worth the effort. By following the tips above, you can start writing code that is clear, maintainable, and efficient.
## **Ready to learn more?**
---
Check out these resources to take a deeper dive into the art of clean coding:
- A book: "The Art of Clean Code " by Robert C. Martin
- A website: "[Clean Code Practices](https://www.cleancoders.com/)" | manavcodaty |
1,867,273 | Uncontrolled vs Controlled React Components | Today, we'll explore the nuanced differences between uncontrolled and controlled components in... | 0 | 2024-05-28T07:00:00 | https://dev.to/shehzadhussain/uncontrolled-vs-controlled-react-components-4295 | webdev, javascript, react, beginners | Today, we'll explore the nuanced differences between uncontrolled and controlled components in React.
Grasping these concepts is crucial for any React developer. It enhances your ability to create robust, user-friendly interfaces and ensures seamless state management across your apps.
Many developers struggle with these concepts, leading to inefficient code and unpredictable UI behavior. Understanding their proper use is key to avoiding these pitfalls.
## Mastering uncontrolled and controlled components is a pivotal step in becoming an adept React developer, as it directly impacts the performance and reliability of your apps.
- Uncontrolled Components: These components store their state internally and update it based on user input. They are similar to traditional HTML form elements.
- Controlled Components: Contrastingly, controlled components do not maintain their state. They receive their current value as a prop from their parent component and a callback function to update the value.
## Bulleted List of Takeaways
- Uncontrolled components offer a simpler approach for implementing form inputs but less control over their state.
- Controlled components provide more predictability and align with React's philosophy of stateful DOM management.
- Understanding when to use each type leads to more efficient code and better performance.
## Understanding Uncontrolled Components
Uncontrolled components are like traditional HTML form elements. They remember what you input without any additional code. Here's a simple example:
## Understanding Controlled Components
Controlled components, on the other hand, render forms elements whose values are controlled by React, as shown here:
## Conclusion
Understanding and correctly implementing uncontrolled and controlled components in React is vital for developers creating intuitive and responsive user interfaces. While uncontrolled components provide a quick and easy solution for simple scenarios, controlled components offer a higher level of control and integration with React's state management, leading to more predictable and manageable code. The choice between them should be guided by the specific needs of your project and your desired level of control over the component's state.
I hope you enjoyed the article.
See you in the next post.
Have a great day! | shehzadhussain |
1,866,108 | Game Development Diary #8 : Still Second Course | 28/05/2024 - Tuesday Clicks and Cursors Learning how to change the mouse cursor and... | 27,527 | 2024-05-28T07:00:00 | https://dev.to/hizrawandwioka/game-development-diary-8-still-second-course-5g85 | gamedev, godot, godotengine, newbie | 28/05/2024 - Tuesday
#Clicks and Cursors
Learning how to change the mouse cursor and detecting mouse clicks from the player
#Building Towers
Creating a scene for defensive towers and learning how to spawn new scenes in code.
#Picking Turret Positions
Connecting the RayPickerCamera and the TurretManager, so we can place the new turret scene onto tiles in the GridMap.
#Making Projectiles
Learning about the Area3D and making the turrets able to fire them in a given direction.
#Introducing Timers
Introducing the Timer node as a tool for making events happen at specific times. This lets us fire the turrets at regular intervals.
#Aiming the Turrets
Using the look_at function and the towers basis, to aim the turrets at enemies on the Path3D.
#Damaging Enemies
Using the Area3D node and variables to give the enemies health that is whittled away by projectiles until they are defeated.
#For Loops and Targeting
Learning how to use loops to identify the best target for each turret.
#Introducing Animations
Learning how to use loops to identify the best target for each turret.
#Instantiating Enemies
Ung what we have learned from spawning projectiles to spawn endless waves of enemies.
#Control Nodes and UI
Introducing Control nodes to create user interfaces. Adding a label to track the players gold count and positioning it with a container.
#Earning and Spending Gold
Finalizing the bank, making the player earn gold when they defeat enemies, and making them spend gold in order to buy turrets.
#Plans for Next Session:
Completing GameDevTV's course
| hizrawandwioka |
1,867,272 | Creating Line Plots with Object-Oriented API and Subplot Function in Python | Simple Line Plot using Matplotlib A simple line plot in Matplotlib is a basic... | 27,508 | 2024-05-28T06:59:43 | https://dev.to/lohith0512/creating-line-plots-with-object-oriented-api-and-subplot-function-in-python-4nel | numpy, beginners, matplotlib, python | ## <u>Simple Line Plot using Matplotlib</u>
A **simple line plot** in Matplotlib is a basic visualization that represents the relationship between two variables (usually denoted as X and Y) using a continuous line. It's commonly used to display trends, patterns, or changes over time.
Here's how you can create a simple line plot using Matplotlib in Python:
```python
import matplotlib.pyplot as plt
import numpy as np
# Define data values
x_values = np.array([1, 2, 3, 4]) # X-axis points
y_values = x_values * 2 # Y-axis points (twice the corresponding x-values)
# Create the line plot
plt.plot(x_values, y_values)
# Add labels and title
plt.xlabel("X-axis")
plt.ylabel("Y-axis")
plt.title("Simple Line Plot")
# Display the plot
plt.show()
```
In this example:
- We use NumPy to define the x-values (evenly spaced points from 1 to 4).
- The y-values are calculated as twice the corresponding x-values.
- The `plt.plot()` function creates the line plot.
- We set labels for the axes and a title for the plot.
If you'd like to see more examples or explore different line plot styles, let me know! 🚀
---
## <u>Object-Oriented API</u>
Let's delve into the object-oriented API in Matplotlib.
**<u>Object-Oriented Interface (OO):</u>**
- The object-oriented API gives you more control and customization over your plots.
- It involves working directly with Matplotlib objects, such as `Figure` and `Axes`.
- You create a `Figure` and one or more `Axes` explicitly, then use methods on these objects to add data, configure limits, set labels, etc.
- This approach is more flexible and powerful, especially for complex visualizations.
Now, let's create a simple example using the object-oriented interface. We'll plot the distance traveled by an object under free-fall with respect to time.
```python
import numpy as np
import matplotlib.pyplot as plt
# Generate data points
time = np.arange(0., 10., 0.2)
g = 9.8 # Acceleration due to gravity (m/s^2)
velocity = g * time
distance = 0.5 * g * np.power(time, 2)
# Create a Figure and Axes
fig, ax = plt.subplots(figsize=(9, 7), dpi=100)
# Plot distance vs. time
ax.plot(time, distance, 'bo-', label="Distance")
ax.set_xlabel("Time")
ax.set_ylabel("Distance")
ax.grid(True)
ax.legend()
# Show the plot
plt.show()
```
In this example:
- We create a `Figure` using `plt.subplots()` and obtain an `Axes` object (`ax`).
- The `ax.plot()` method is used to plot the distance data.
- We customize the plot by setting labels, grid, and adding a legend.
Feel free to explore more features of the object-oriented API for richer and more complex visualizations! 🚀\
---
## <u>The Subplot() function</u>
The `plt.subplot()` function in Matplotlib allows you to create multiple subplots within a single figure. You can arrange these subplots in a grid, specifying the number of rows and columns. Here's how it works:
1. **Creating Subplots:**
- The `plt.subplot()` function takes three integer arguments: `nrows`, `ncols`, and `index`.
- `nrows` represents the number of rows in the grid.
- `ncols` represents the number of columns in the grid.
- `index` specifies the position of the subplot within the grid (starting from 1).
- The function returns an `Axes` object representing the subplot.
2. **Example:**
Let's create a simple figure with two subplots side by side:
```python
import matplotlib.pyplot as plt
import numpy as np
# Create some sample data
x = np.array([0, 1, 2, 3])
y1 = np.array([3, 8, 1, 10])
y2 = np.array([10, 20, 30, 40])
# Create a 1x2 grid of subplots
plt.subplot(1, 2, 1) # First subplot
plt.plot(x, y1, label="Plot 1")
plt.xlabel("X-axis")
plt.ylabel("Y-axis")
plt.title("Subplot 1")
plt.grid(True)
plt.legend()
plt.subplot(1, 2, 2) # Second subplot
plt.plot(x, y2, label="Plot 2", color="orange")
plt.xlabel("X-axis")
plt.ylabel("Y-axis")
plt.title("Subplot 2")
plt.grid(True)
plt.legend()
plt.tight_layout() # Adjust spacing between subplots
plt.show()
```
In this example:
- We create a 1x2 grid of subplots using `plt.subplot(1, 2, 1)` and `plt.subplot(1, 2, 2)`.
- Each subplot contains a simple line plot with different data (`y1` and `y2`).
- We customize the labels, titles, and grid for each subplot.
Feel free to explore more complex arrangements by adjusting the `nrows` and `ncols` parameters! 📊🔍
| lohith0512 |
1,867,268 | Top 10 Code Review Tools for Developers | Code review is an essential part of the software development process that helps identify bugs and... | 0 | 2024-05-28T06:58:01 | https://dev.to/hyscaler/top-10-code-review-tools-for-developers-26o4 | developers, coding, testing, programming | Code review is an essential part of the [software development process](https://hyscaler.com/insights/web-application-development-process-steps/) that helps identify bugs and improve code quality before merging it into the main codebase.
In this blog post, we will explore the top 10 code review tools that developers can use to streamline their code review process and enhance the overall quality of their projects.
## Benefits of Code Review Tools
Using code review tools offers several benefits to developers and development teams:
- Minimize chances of issues in the code
- Ensure new code adheres to guidelines
- Increase efficiency of new code
- Improve team members' expertise
- Remove redundancy in the development cycle
## 10 Popular Code Review Tools
1. **Review Board**: Review Board is a web-based, open-source tool that facilitates code review by allowing users to organize and display updated files, communicate effectively between reviewers and developers, and assess the efficacy of the code review process with metrics.
2. **Crucible**: Crucible supports various version control systems like SVN, Git, Mercurial, CVS, and Perforce, enabling developers to perform code reviews efficiently. It allows for overall comments on the code and inline comments within the diff view to pinpoint specific areas for improvement.
3. **GitHub**: GitHub's code review tool is integrated with the platform, making it convenient for users already on GitHub. It enables reviewers to assign themselves to pull requests, analyze diffs, comment inline, and resolve Git conflicts through the web interface.
4. **Axolo**: Axolo is a code review tool that focuses on providing a seamless and user-friendly experience for developers. It offers features such as easy navigation of code changes, collaborative commenting, and integration with popular version control systems.
5. **Collaborator**: Collaborator is a code review tool that emphasizes collaboration between team members during the code review process. It allows for detailed discussions, annotations, and feedback exchange to ensure thorough code evaluation and improvement.
6. **CodeScene**: CodeScene goes beyond traditional code review by incorporating machine learning and AI for behavioral analysis. It helps developers understand the impact of their code changes on the overall project and provides insights for improving code quality and team productivity.
7. **Visual Expert**: Visual Expert specializes in database code review, offering developers tools to enhance the quality and performance of their database code. It provides in-depth analysis, visualization, and optimization suggestions for database-related code.
8. **Gerrit**: Gerrit is an open-source code review tool that integrates seamlessly with Git repositories. It allows for detailed code reviews, inline commenting, and workflow customization to streamline the code review process and enhance collaboration among team members.
9. **Rhodecode**: Rhodecode is a web-based code review tool that integrates well with existing projects, making it a suitable choice for developers seeking a dependable and user-friendly solution. Its community edition is ideal for those looking for a free yet robust code review tool.
10. **Veracode**: Veracode offers a suite of code review tools that automate testing, accelerate development, and improve project efficiency. With features like automated testing, remediation integration, and performance enhancement, Veracode helps developers deliver high-quality software products.
## Key Features to Look For
When choosing a code review tool, it's important to consider key features such as:
- Ability to organize and display updated files
- Facilitation of communication between reviewers and developers
- Assessment of code review process efficacy with metrics
- Compatibility with your technology stack
## Best Practices for Effective Code Reviews
To ensure effective code reviews, developers should follow these best practices:
- Provide constructive feedback
- Encourage open communication
- Highlight positive aspects of the code
- Establish clear timelines and requirements for code review requests
## Conclusion
In conclusion, utilizing code review tools is crucial for maintaining code quality and improving the efficiency of the development process. By selecting the right tool, following best practices, and leveraging key features, developers can enhance their code review process and deliver [high-quality software products](https://hyscaler.com/service/devops-engineering-services/).
Stay tuned for more insights and tips on software development and coding practices! | rajatp |
1,867,271 | 投資界の大家佐藤 光信（Sato Mitsunobu）が語る財産管理の智慧 | 佐藤 光信 Sato Mitsunobu プロフィール： 早稲田大学高等学院卒業後高校、1996年に早稲田大学... | 0 | 2024-05-28T06:56:35 | https://dev.to/satomitsun/tou-zi-jie-noda-jia-zuo-teng-guang-xin-sato-mitsunobugayu-rucai-chan-guan-li-nozhi-hui-22bk | 佐藤 光信 Sato Mitsunobu
プロフィール：
早稲田大学高等学院卒業後高校、1996年に早稲田大学 政治経済学部を卒業。
卒業後、ヤマト証券の仕事に従事し、主に信託の販売を担当。
2003年、米国に渡り、アメリカ銀行メリルリンチに入社 ファンドの確立、取引構造と実行、投資評価、コンプライアンス管理など、ファンド管理と販売を担当する。
その他のビジネスとして、ビジネス開発コンサルティングに加えて、ベンチャーキャピタル、合弁、スピンオフ、および米国と英国の投資にも関与。
2018年、藤田雄一氏の招きにより、アジア太平洋地域基金部シニアアナリストとしてマッコーリー・アセット・マネージメン社に入社。
日本の金融業界で20年近くの経験がある、主に日本政府の資金、債券、株式市場に参加しており、販売から取引までのさまざまな市場関連のポジションを任される。
スを蓄積し、資本および経済市場の運営に精通していました。
同時に、様々な金融投資市場にも精通しており、投資市場における鋭い嗅覚を有し、資産運用の経験も豊富です。
投資テクノロジーの面では、ギャン理論、ボルインデックス、SMAチャートパターン分析などのテクニカル分析に関する高い実績と知識を持ち、市場動向の調査と判断に非常に精通しています。
人生の信条：財産管理は、単なる金融数字の積み重ねではなく、綿密に設計され、卓越した実行を行う認知芸術である。
ポジティブ思考は、ポジティブ人生をもたらし、ネガティブ思考は、ネガティブ人生をもたらす。 | satomitsun | |
1,770,330 | Writing High Quality Tests to Foster Abstractions to Evolve | In the intricate world of software design, distinguishing between stable and volatile components is... | 0 | 2024-05-28T06:52:21 | https://dev.to/mohsenbazmi/writing-high-quality-tests-to-foster-abstractions-to-evolve-4b2k | In the intricate world of software design, distinguishing between stable and volatile components is essential. Our tests should rely on stable abstractions, yet the iterative nature of modeling often reveals instability in what was once deemed rock-solid. However, modifying these abstractions can be risky as tests may not adequately safeguard them. These series of articles aim to address this challenge by leveraging some automation testing patterns and exploring strategies for crafting automated tests that enhance the safety of the refactoring process, despite the evolving nature of software design.
In these series of articles, we will delve into various approaches for building maintainable tests. We’ll discuss the advantages and disadvantages of each method. Our journey begins with an illustrative test case for a poorly designed system. Instead of immediately revamping the system’s design, we will investigate various methods to adjust the test that safeguards our refactoring initiatives.
As we progress, we will discover techniques to optimize the scope of units under test. At the same time, we’ll gain insights into the factors we need to control in order to safeguard the quality of tests throughout our journey. Smells to sniff and goals to protect. The following image illustrates them.
{% katex %}
\newline
{% endkatex %}
We'll start with deliberately using a poorly designed model and a subpar test surrounding it, we'll investigate diverse approaches to tackle the issues.
To kick things off, let's consider a simple scenario: scheduling a doctor's appointment with a naive unsophisticated domain model.
```cs
public void Successful_Appointment()
{
//Arrange
//Load the doctor
Doctor doctor = new Doctor();
doctor.Name = "David Smith";
doctor.HourlyRate = 80;
//Load the patient
Patient patient = new Patient();
patient.Name = "Maria Garcia";
patient.Age = 65;
//Exsercise
var appointment = new Appointment();
appointment.Doctor = doctor;
appointment.Patient = patient;
var time = DateTime.Now.AddDays(2);
var fee = 80;
appointment.Make(doctor, time, fee);
//Assert:
Assert.Equal("David Smith", appointment.Doctor.Name);
Assert.Equal("Maria Garcia", appointment.Patient.Name);
Assert.Equal(DateTime.Now.AddDays(2), appointment.Time);
}
```
Despite the issues in the test code, it is clear that the domain model lacks a robust design. However, at this moment, we choose not to delve into those issues. Our current domain knowledge informs us that we should defer further design considerations.
Now, the critical question arises: In this specific scenario, does the test effectively protect the model, allowing us to refactor it later?
> “Whenever I do refactoring, the first step is always the same. I need to ensure I have a solid set of tests for that section of code. The tests are essential because even though I will follow refactorings structured to avoid most of the opportunities for introducing bugs.”
**— Martin Fowler**
How confident can we be in refactoring the domain model? For instance, can I modify the model to be used as follows without breaking the test mentioned above?
```csharp
Doctor doctor = new Doctor("David Smith", 80);
Patient patient = new Patient("Maria Garcia", 65);
patient.ScheduleAppointment(DateTime.Now.AddDays(3));
```
Clearly not. Smallest change to the interface will fail the test. Even if the system's behavior stays the same.
The problem of our test is known as *Interface Sensitivity* (XUnit Patterns).
Besides Interface Sensitivity, the test doesn't document the system's behavior transparently.
A quick step towards addressing both problems is to extract the test steps into separate methods. These methods can also be extracted into a separate class (named `Appointment`), and express the *Ubiquitous Language* (DDD) in the methods’ names.
```csharp
public void Successful_Appointment()
{
appointments
.Given(David_Smith_is_a_doctor())
.And(Maria_Garcia_is_a_patient())
.When(Maria_Garcia_makes_an_appointment_with_Dr_Smith())
.Then(Maria_Garcia_should_have_an_appointment_with_Dr_Smith());
}
```
We extracted four methods.
* `David_Smith_is_a_doctor()`
* `Maria_Garcia_is_a_patient()`
* `Maria_Garcia_makes_an_appointment_with_Dr_Smith()`
* `Maria_Garcia_should_have_an_appointment_with_Dr_Smith()`
These are called *Test Utility Methods* (XUnit Patterns) and the class that contains them (`Appointment`) is called a *Test Helper* (XUnit Patterns).
The methods can be reused in multiple test cases.
Each *Test Utility Method* is a single source of truth. It implies that whenever a change breaks one or more tests that use our new *Test Utility Methods* it's much easier to find and update them accordingly to go back green again (pass all the tests that are impacted by the change). So this refactoring made our test more maintainable for two reasons.
* We made a more supportive *Safety Net*.
* In terms of documentation, the *Test Utility Method* names explicitly conform to the Ubiquitous Language. So the methods are easier to find whenever a change is required.
So can we call this test an executable documentation? I don't think so. 😔 The maintainability can also be improved further. We will learn more on them later.
So far, we learned to enhance the quality of our safety net by extracting *Test Utility Methods* and *Test Helpers*. This was the first refactoring and the simplest one in our journey. With a few more minor adjustments, this kind of refactoring can serve as a last-resort solution 😁. But let's see what exactly is wrong with it first.
_______________________
##Tests as Documentation
Ideally, tests should have the following properties to be considered as executable documentation.
- **Ubiquitous Language (DDD):** They should conform to the Ubiquitous Language (DDD), so that it's easily understandable by non-technical domain experts.
- **Proof of Claims:** How much the test proves what it claims? The test's reader should transparently see the effect of API calls on the system. This also simplifies the debugging process in the event of unexpected failures.
- **Usability Guide:** Tests should contain information about how the system under test can be used, effectively serving as a form of live documentation.
- **Easy to Grasp:** All of the properties above should be easily graspable at first glance. Tests should be easy to read and understand, Even for someone who is not familiar with the codebase. Easy to understand tests are also more maintainable.
- **Always-Up-to-Date Documentation:** Changes to the production code should reflect into the tests with minimum hassle. This can be achieved using refactoring tools or other automated methods to ensure that the tests remain up-to-date as the system evolves. This is crucial for maintaining the accuracy of the documentation provided by the tests.
- **Expressive Result Verification:** Testing procedures should strike a balance, avoiding excessive or insufficient verification. The focus of verification should be meaningful and aligned with business requirements. Transparent examination of API call results through explicit assertions.
- **Minimal Distraction:** Tests should minimize the noise for readers. They should only contain relevant information.
The properties try to shape a common image. They picture what an ideal executable documentation looks like. Some of them may sound overlapping. In fact, they try to complement each other. They are different dimensions of the same concept.
We we are not prescribing a one size fits all solution. Not all properties can be perfectly applied into a single test.
Let's take a look at our test again.
```csharp
public void Successful_Appointment()
{
appointments
.Given(a => a.David_Smith_is_a_doctor())
.And(a => a.Maria_Garcia_is_a_patient())
.When(a => a.Maria_Garcia_makes_an_appointment_with_Dr_Smith())
.Then(a => a.Maria_Garcia_should_have_an_appointment_with_Dr_Smith());
}
```
While Ubiquitous Language is clearly expressed in this test, It still cannot be used as an average documentation. The following chart illustrates how the qualities apply to this test. 🧐
Let's try to parameterize the *Test Utility Methods* to see if it improves the test's quality as documentation.
```csharp
public void Successful_Appointment()
{
const string Dr_David_Smith = "David Smith";
const string Maria_Garcia = "Maria Garcia";
const string time = "2024-10-10";
appointments
.Given(a => a.Register_Doctor(Dr_David_Smith))
.And(a => a.Register_Patient(Maria_Garcia))
.When(a => a.Make_Appointment(Dr_David_Smith, Maria_Garcia, time))
.Then(a => a.Appointment_should_exist_for(Dr_David_Smith, Maria_Garcia, time));
}
```
The *Test Utility Methods* might pass additional parameters to the production APIs, however, we only passed what matters in this scenario, and let the utility methods to decide on the rest. By only passing the parameters that matter in this scenario to the *Test Utility Methods* we made the causal relationship between the steps (*Given*, *When*, and *Then*) more transparent. It's usually a good practice to paramerize the test method as well.
```csharp
[InlineData("Dr David Smith", "Maria Garcia", "2024-10-10")]
public void Make_appointment_for(string Dr_Smith, string Maria, string at_13)
{
appointments
.Given(a => a.Register_Doctor(Dr_Smith))
.And(a => a.Register_Patient(Maria))
.When(a => a.Make_Appointment(Dr_Smith, Maria, at_13))
.Then(a => a.Appointment_should_exist_for(Dr_Smith, Maria, at_13));
}
```
By parameterizing the test, this test explicitly expresses the data it depends on. The *Test Utility Methods* are also more reusable and they convey their intention more transparently. Besides, it can proof what it claims better by adding different variations of data.
```csharp
[InlineData("Dr John Davis", "Jane Miller", "2020-03-05")]
[InlineData("Dr Sam Brown", "Tony Jones", "2020-03-05")]
[InlineData("Dr David Smith", "Maria Garcia", "2024-10-10")]
public void Make_appointment_for(string Dr_Smith, string Maria, string at_13)
```
The BDD framework does not sound necessary any more. We can remove it.
```csharp
[InlineData("Dr David Smith", "Maria Garcia", "2024-10-10")]
public void Make_appointment_for(string Dr_Smith, string Maria, string at_13)
{
//Given
appointments.Register_Doctor(Dr_Smith);
appointments.Register_Patient(Maria);
//When
appointments.Make_Appointment(Dr_Smith, Maria, at_13);
//Then
appointments.Appointment_should_exist_for(Dr_Smith, Maria, at_13);
}
```
The refactored version of our test partially documents the system's functionality, but it's yet to reach the level of ideal documentation. Let's see how this refactoring affects the chart.
The diagram illustrates a an optimistic language for assessing the quality of our test as documentation. However, it's not the most straightforward language for warning potential quality deficiencies in software. In software industry literature, a more skeptical yet direct language is employed. In this context, the word *smells* is used to warn symptoms of potential quality shortcomings. So let's pause and learn more about test smells.
_______________________
We saw a simple example of how simple safety nets can protect our evolving design. But it's not always that straightforward. Our initial BDD-style test wasn't cutting it in terms of quality. We remedied the quality issues, and turned our BDD style test into a solid fallback plan.
Now, it's time to take things slow and mix our exploration with some theory and discussion to tackle the issues more directly. We're starting from scratch. We want to stick with the imperfect domain model design for as long as possible, so we can explore different problems and figure out solutions to build strong yet flexible safety nets.
**Introduction to Test Smells**
Test smells are indicators of potential issues or weaknesses in our tests. Similar to code smells in production code, which signal areas requiring refactoring or enhancement, test smells highlight areas where tests could be improved to ensure better quality. They're used as cues for possible deficiencies in the design or implementation of the test suite. Some smells lead to other smells.
And a few smells may be called by different aliases.
The purpose of this guide is to keep it rather example-based and practical. Let's look for a couple of those symptoms in our original test.
```cs
public void Successful_Appointment()
{
//Arrange
//Load the doctor
Doctor doctor = new Doctor();
doctor.Name = "David Smith";
doctor.HourlyRate = 80;
//Load the patient
Patient patient = new Patient();
patient.Name = "Maria Garcia";
patient.Age = 65;
//Exsercise
var appointment = new Appointment();
appointment.Doctor = doctor;
appointment.Patient = patient;
var date = DateTime.Now.AddDays(2);
var time = DateTime.Now.AddDays(2);
var fee = 80;
appointment.Make(date, time, fee);
//Assert
Assert.Equal("David Smith", appointment.Doctor.Name);
Assert.Equal("Maria Garcia", appointment.Patient.Name);
Assert.Equal(DateTime.Now.AddDays(2), appointment.Time);
}
```
The most obvious issue with this test is that it's not easy to understand it at a glance. This smell is called Obscure Test(XUnit Patterns). But that is a general problem. Lots of smells can lead to Obscure Tests. Which ones are the root causes in our test?
{% katex %}
.
.
.
.
.
\newline
\newline
\newline
\newline
\newline
{% endkatex %}
**To be continued...** | mohsenbazmi | |
1,867,269 | Tokenization of RWA (Real-World Assets): A Comprehensive Guide | The digitization of assets through blockchain technology is transforming the financial landscape.... | 0 | 2024-05-28T06:51:05 | https://dev.to/donnajohnson88/tokenization-of-rwa-real-world-assets-a-comprehensive-guide-303l | tokenization, cryptocurrency, blockchain, beginners | The digitization of assets through blockchain technology is transforming the financial landscape. Tokenization involves converting tangible and intangible RWA (real-world assets) into digital tokens on a blockchain using [crypto development services](https://blockchain.oodles.io/cryptocurrency-development-services/?utm_source=devto), enhancing their accessibility, liquidity, and divisibility. This comprehensive guide explores asset tokenization's concept, benefits, challenges, and future potential.
## What is Tokenization?
Tokenization is converting ownership rights to an RWA (real-world asset) into a digital token on a blockchain. This creates a digital representation of an asset that can be traded and managed on a blockchain. These tokens represent anything from real estate and art to commodities and intellectual property.
This comprehensive guide explores the concept, benefits, challenges, and future potential of RWA (real-world asset) tokenization: [Tokenization of RWA (Real-World Assets)](https://blockchain.oodles.io/blog/real-world-asset-rwa-tokenization/?utm_source=devto) | donnajohnson88 |
1,867,265 | Key Competencies for React Developers in 2024: What You Should Learn | The world of web development is changing rapidly, with a stream of fresh technologies and frameworks... | 0 | 2024-05-28T06:48:35 | https://dev.to/lewisblakeney/key-competencies-for-react-developers-in-2024-what-you-should-learn-27h2 | react, webdev, reactjsdevelopment |
The world of web development is changing rapidly, with a stream of fresh technologies and frameworks emerging. The component based design along with an active ecosystem makes it the most popular platform for building modern interactive user interfaces.
To be ahead of everyone else, [**React developers**](https://www.webcluesinfotech.com/react-js-development-services/) need to study more than just basic concepts. Although this entails appreciating core React principles, knowing higher-level features and auxiliary technologies would help you become a better developer in the process. In the expansive job market for people dealing with React, these skills make them very attractive.
This guide will exhaustively go through some key competencies that are expected to take your competence in React Development by 2024 to another notch. For instance, we will examine both basic aspects as well as advanced ones such as performance optimization tricks and testing methodologies. Moreover, it also considers how can one broaden his knowledge on react by embracing other complementary technologies such as Typescript or CSS-in-JS libraries.
So tie yourself up loosely for improving your react skills. We believe that in our culture continuous learning must be nurtured alongside critical competencies which empower you to be an outstanding react developer able to create high performance websites.
**I. Core React Fundamentals**
An initial stage for skilled development is to develop with React to enhance a firm knowledge base in the basics. These principles form the basis upon which more advanced skills can be developed and complex interactive apps made. Let us examine some of the pillars of React development:
**A. Component-Based Architecture**
Every React app is based on reusable components. These are independent pieces of code that encapsulate user interface functionality and data logic. The components may either be functional (JavaScript functions) or class-based (ES6 classes). Nowadays, functional components are easier and more common due to the introduction of Hooks. It is crucial to understand how to properly create and use both functional and class-based when building modular, maintainable react applications.
**B. JSX Syntax:**
JSX stands for JavaScript XML, which is a syntax extension that allows you to write HTML-like structures within your JavaScript code. This makes it easier to define the User Interface (UI) of your components more intuitively. When compiled, JSX turns into normal JavaScript function calls. Despite just being not mandatory in React, it has become popular because it enhances readability while separating UI structure from its logic.
**C. State Management**
React state represents the component’s UI data as well and other react components could have their state too. Within this state, there might be a simple boolean flag or something quite complex like an object having such things as information about the user inside it. For instance, useState Hook provided by React helps manage component states internally. In case you are working on large projects where there can be lots of prop drilling out there then redux is always there for you.
**D. Props Drilling and Alternatives**
To achieve features of this composability element in application design, React uses props mechanisms that pass through its component hierarchy. In connection with this matter, props allow sharing of data between the parent component and its child. Nevertheless, the flow of code execution can be broken or there may be some bugs in the code due to excessive prop drilling (prop passing through multiple levels of nested components). React has solved this in different ways such as Context API or state management solutions for more complex data handling in bigger applications.
**III. Mastering Advanced React Concepts**
**1. React Hooks**
Since the introduction of React 16.8, React Hooks have changed how functions in functional components are written by developers. They are a way to hook into certain parts of the React state and lifecycle features from functional components without using class-based components. Some important hooks include:
- useState – This is used for state management in a functional component.
- useEffect- It is meant to do side effects in functional components such as data fetching or subscriptions.
- useContext – This makes it possible for descendant components to get access to context objects within their parent component’s tree.
- Hooks make functions shorter, cleaner and are more flexible than the old-style classes. You can’t do modern react development without mastering hooks
**2.Performance Optimization:**
Today’s fast-paced web demands smooth and responsive user experiences.There are several ways that performance can be optimized on React apps including;
Memoization is about caching results of expensive function calls so as to avoid redundant computations.React. memo library can be used for memorizing components.
This implies breaking down your application code into smaller bundles so that they can load faster at the beginning especially when we think about larger applications.
Only loading what a user needs when it’s needed, thus improving perceived performance.
Therefore, with these optimization techniques we can have React applications which load quickly with seamless user experiences.
**3.TESTING IN REACT**:
Writing unit tests and integration tests in order to keep your react apps reliable and maintainable is not optional but a must-have feature of any programming language.That helps catch regressions early during development while providing confidence about changes made in codebases.Some popular testing libraries available for React include such examples as;
- Jest: This is a widely used test framework that allows mocking, snapshot testing, test runners among others
- React Testing Library – A set of utilities focused on testing react components independently from their implementation details
- Thus testing is an integral part of building high quality React applications.
**4. ROUTING IN REACT APPLICATIONS:**
Single page applications (SPAs) built with React often require robust routing mechanisms to handle navigation between different views within the application. Popular routing libraries such as react router provide functionalities for:
Defining routes and their corresponding components.
Handling URL changes and displaying appropriate content.
Managing navigation history and providing features like back and forward buttons.
Therefore, one needs to have an understanding of routing concepts to build well-structured user-friendly SPAs using React.
**IV. Expanding Your Skillset with Complementary Technologies**
To be a complete React developer, some basic concepts must be understood. It is essential to avoid limiting oneself to the framework only.
Here are several ways of enhancing your developers’ skills by incorporating complementary technologies.
**TypeScript:**
TypeScript is practically JavaScript with optional static typing and applying it in React has numerous advantages:
Improved Type Safety: Errors can be discovered at coding time because type annotations improve core stability
**Code Readability Enhancement**: Types define which data goes through and how variables are treated thus making your life easier and other people who read it while you code.
**Better Developer Experience:** Modern IDEs like Visual Studio Code have better features for auto-completion, refactoring tools as well as support for typescript integration.
However, Typescript now seems to be more popular among the react community since it helps mitigate both size and complexity problems associated with applications.
**CSS-in-JS Libraries:**
Traditionally, styling React components would require separate Cascading Style Sheets (CSS) files. However, there are options such as Styled Components or Emotion that allow for CSS-in-JS libraries:
**Inline Styles:** These allow defining styles directly inside Javascript code using template literals, and therefore enabling more encapsulation of concerns.
**Dynamic Styling:** This feature allows us to create styles based on props or state; thus, we can drive our UIs with live data using CSS-in-JS
This makes your styling process much simpler resulting in maintainable codes particularly if you work on huge apps
**Build Tools and Automation:**
Efficiency as well productivity results from streamlining development workflow. Tasks done by Webpack among other build tools include packaging your JavaScript codes, processing assets e.g., images or fonts or creating production ready builds etc. Also developers often use automation tools like npm scripts that enable them automate repetitive tasks e.g., running tests or deploying their app.
Therefore, these tools will help you concentrate on developing faster and with less trouble.
**Understanding Modern Web Development Practices:**
To be a successful React developer, one should stay up-to-date in the ever-changing world of web development. Here are some important areas to consider:
**Progressive Web Apps (PWAs):** Also known as PWAs, this is an application that runs on a browser but behaves much like an app due to features such as service workers for offline functionality, push notifications, etc.
**Accessibility Best Practices:** Your website should be accessible so that all people can get use out of it regardless of their abilities.
Thus, modern and inclusive React applications are being made according to the current trends targeting a broader audience.
**V. The Evolving React Ecosystem and Continuous Learning**
Dynamism is the order of the day in React development. Every once in a while, new features and libraries come up. It is therefore expedient for any developer, who uses React, to create this kind of learning culture within his/her organization, in order to stay relevant. How can you keep pace?
**React Official Documentation:** The official documentation of react always has reliable information on various concepts of React, APIs’ and best practices which should guide you during development. This documentation is updated regularly with most recent information that can be used as reference material during your learning process.
**Blogs and Articles:** Several blogs, websites and publications usually discuss a lot about everything relating to the React ecosystem. By subscribing to these resources every week, different perspectives are exposed; new libraries are introduced; tutorials covering several aspects of React are provided step-by-step.
**Online Communities:** Participating in online communities such as r/reactjs or forums for developers helps connect with other react developers where they ask questions; share knowledge or just keep up-to-date with latest trends and discussions.
**Open-Source Projects:** Participating in open-source projects will provide practical experience besides allowing you learn from experienced developers who are at the forefront of the react community. Your skills get honed when actively involved in open-source projects that also give back to the react ecosystem.
By applying these resources together with having a culture of learning one’s capabilities remain competitive within an ever-changing web design environment.
**VI. Building Exceptional React Applications with a Trusted Partner
The Growing Demand for React Developers**
The need for skilled React developers is on the rise as companies increasingly leverage React to build modern, performant, and user-centric web applications. Finding the right development partner with a deep understanding of React and the latest advancements is crucial for the success of your project.
Partnering with React Development Experts
Consider collaborating with a team of React development experts who possess the following qualities:
**In-depth React Knowledge:** A proven track record of building complex and scalable React applications, staying up-to-date with the latest React features and best practices.
**Focus on Performance and User Experience:** An unwavering commitment to creating applications that load quickly, deliver a seamless user experience, and prioritize accessibility.
**Agile Development Methodology:** A collaborative and iterative development approach that ensures clear communication, efficient project management, and a focus on delivering results that align with your vision.
**Proven Track Record of Success:** A history of delivering high-quality React applications on time and within budget for clients across various industries.
By partnering with a team that embodies these qualities, you gain access to a wealth of React expertise and ensure your project is set up for success.
**Ready to Build Your Next-Gen React Application?**
If you're looking to create a modern, performant, and user-friendly web application using React, then look no further. Contact us to discuss your project requirements and explore how our React development experts can help you achieve your goals.
We have a passion for building exceptional React applications and are confident we can be the perfect partner for your next project.
**** | lewisblakeney |
1,867,264 | Which is More Suitable for Bottom Fishing, Low Market Value or Low Price? | The previous articles https://www.fmz.com/digest-topic/10286 and... | 0 | 2024-05-28T06:47:04 | https://dev.to/fmzquant/which-is-more-suitable-for-bottom-fishing-low-market-value-or-low-price-20ab | market, trading, fmzquant, fishing | The previous articles https://www.fmz.com/digest-topic/10286 and https://www.fmz.com/digest-topic/10292 discussed the correlation between cryptocurrency price fluctuations and Bitcoin, as well as the impact of launching perpetual contracts on prices. This article will continue to explore another important factor affecting coin prices - market value. Readers familiar with quantitative trading should know that there is a most effective factor in the A-share market - small market value. The performance of small-cap stock rotation is very counter-intuitive, far exceeding various indicators, those interested can find out for themselves. So how does the price performance of small-cap or low-priced digital currencies look?
### Data Processing and Collection
This section uses the same data as the previous few articles, so it won't be repeated here.
### Performance of Low-Priced Currencies
Low-priced currencies usually refer to digital currencies with lower unit prices. These currencies are more attractive to small investors due to their low prices. Most people only see many zeros in the price but don't care much about the market value. Each unit reduction (zero) means that the price is multiplied by 10, which is very attractive to some people, but it may also be accompanied by higher price volatility and risk.
As usual, let's first look at the performance of the index, with two bull markets at the beginning and end of the year. Every week we select the 20 lowest priced currencies, and the results are very close to those of indicators, indicating that low prices do not provide too much additional return.
```
h = 1
lower_index = 1
lower_index_list = [1]
lower_symbols = df_close.iloc[0].dropna().sort_values()[:20].index
lower_prices = df_close.iloc[0][lower_symbols]
date_list = [df_close.index[0]]
for row in df_close.iterrows():
if h % 42 == 0:
date_list.append(row[0])
lower_index = lower_index * (row[1][lower_symbols] / lower_prices).mean()
lower_index_list.append(lower_index)
lower_symbols = row[1].dropna().sort_values()[:20].index
lower_prices = row[1][lower_symbols]
h += 1
pd.DataFrame(data=lower_index_list,index=date_list).plot(figsize=(12,5),grid=True);
total_index.plot(figsize=(12,5),grid=True); #overall index
```
### Performance of Small Market Cap Currencies
Due to the constantly changing circulation, the market value calculation here uses the total supply volume, with data sourced from Coincapmarket. Those who need it can apply for a key. A total of 1000 currencies with the highest market values were selected. Due to naming methods and unknown total supplies, we obtained 205 currencies that overlap with Binance perpetual contracts.
```
import requests
def get_latest_crypto_listings(api_key):
url = "https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest?limit=1000"
headers = {
'Accepts': 'application/json',
'X-CMC_PRO_API_KEY': api_key,
}
response = requests.get(url, headers=headers)
if response.status_code == 200:
return response.json()
else:
return f"Error: {response.status_code}"
# Use your API key
api_key = "xxx"
coin_data = get_latest_crypto_listings(api_key)
supplys = {d['symbol']: d['total_supply'] for d in coin_data['data']}
include_symbols = [s for s in list(df_close.columns) if s in supplys and supplys[s] > 0 ]
```
An index is drawn from the 10 cryptocurrencies with the lowest market value each week, and compared with the overall index. It can be seen that small-cap cryptocurrencies performed slightly better than the overall index in the bull market at the beginning of the year. However, they started to rise ahead of time during September-October's sideways movement, and their final increase far exceeded that of the total index.
Small-cap cryptocurrencies are often considered to have higher growth potential. Because their market values are low, even relatively small inflows of funds can cause significant price changes. This potential for high returns attracts investors and speculators' attention. When there is a stir at bottom markets, due to less resistance to rise, small-cap currencies often take off first and may even indicate that a general rising bull market is about to begin.
```
df_close_include = df_close[include_symbols]
df_norm = df_close_include/df_close_include.fillna(method='bfill').iloc[0] #Normalization
total_index = df_norm.mean(axis=1)
h = 1
N = 10
lower_index = 1
lower_index_list = [1]
lower_symbols = df_close_include.iloc[0].dropna().multiply(pd.Series(supplys)[include_symbols], fill_value=np.nan).sort_values()[:N].index
lower_prices = df_close_include.iloc[0][lower_symbols]
date_list = [df_close_include.index[0]]
for row in df_close_include.iterrows():
if h % 42 == 0:
date_list.append(row[0])
lower_index = lower_index * (row[1][lower_symbols] / lower_prices).mean()
lower_index_list.append(lower_index)
lower_symbols = row[1].dropna().multiply(pd.Series(supplys)[include_symbols], fill_value=np.nan).sort_values()[:N].index
lower_prices = row[1][lower_symbols]
h += 1
pd.DataFrame(data=lower_index_list,index=date_list).plot(figsize=(12,5),grid=True);
total_index.plot(figsize=(12,5),grid=True);
```
### Summary
This article, through data analysis, found that low-priced currencies did not provide additional returns and their performance was close to the market index. The performance of small market cap currencies significantly exceeded the overall index increase. Below is a list of contract currencies with a market value less than 100 million U for reference, even though we are currently in a bull market.
'HOOK': 102007225,
'SLP': 99406669,
'NMR': 97617143,
'RDNT': 97501392,
'MBL': 93681270,
'OMG': 89129884,
'NKN': 85700948,
'DENT': 84558413,
'ALPHA': 81367392,
'RAD': 80849568,
'HFT': 79696303,
'STMX': 79472000,
'ALICE': 74615631,
'OGN': 74226686,
'GTC': 72933069,
'MAV': 72174400,
'CTK': 72066028,
'UNFI': 71975379,
'OXT': 71727646,
'COTI': 71402243,
'HIGH': 70450329,
'DUSK': 69178891,
'ARKM': 68822057,
'HIFI': 68805227,
'CYBER': 68264478,
'BADGER': 67746045,
'AGLD': 66877113,
'LINA': 62674752,
'PEOPLE': 62662701,
'ARPA': 62446098,
'SPELL': 61939184,
'TRU': 60944721,
'REN': 59955266,
'BIGTIME': 59209269,
'XVG': 57470552,
'TLM': 56963184,
'BAKE': 52022509,
'COMBO': 47247951,
'DAR': 47226484,
'FLM': 45542629,
'ATA': 44190701,
'MDT': 42774267,
'BEL': 42365397,
'PERP': 42095057,
'REEF': 41151983,
'IDEX': 39463580,
'LEVER': 38609947,
'PHB': 36811258,
'LIT': 35979327,
'KEY': 31964126,
'BOND': 29549985,
'FRONT': 29130102,
'TOKEN': 28047786,
'AMB': 24484151
From: https://blog.mathquant.com/2023/12/04/which-is-more-suitable-for-bottom-fishing-low-market-value-or-low-price.html | fmzquant |
1,867,263 | Building a Command-Line Interface (CLI) Application with Click in Python | Building User-Friendly CLIs with Click in Python Command-line interfaces (CLIs) can be... | 0 | 2024-05-28T06:45:42 | https://dev.to/manavcodaty/building-a-command-line-interface-cli-application-with-click-in-python-475b | python, cli, click, programming | ## **Building User-Friendly CLIs with Click in Python**
---
Command-line interfaces (CLIs) can be powerful tools, but they can also be intimidating for new users. Click is a Python library that makes it easy to create user-friendly CLIs with rich features.
In this blog post, we'll explore the benefits of using Click and walk through the steps to build a simple CLI application.
## **Why Click?**
---
Click offers several advantages for CLI development:
- **Simple and intuitive:** Click uses decorators and Pythonic syntax, making it easy to learn and use.
- **Feature-rich:** Click supports a wide range of features, including arguments, options, subcommands, help messages,and more.
- **Elegant output:** Click helps you format output for readability and can generate helpful error messages.
- **Testing support:** Click provides tools to simplify testing your CLI application.
## **Building a Basic CLI App**
---
Let's create a simple CLI tool that greets the user by name. Here's what our Python script might look like:
```python
import click
@click.group()
def cli():
pass
@cli.command()
@click.argument('name', prompt='What is your name?')
def greet(name):
click.echo(f"Hello, {name}!")
if __name__ == '__main__':
cli()
```
**Explanation:**
1. We import the click library.
2. We define a Click group using the @click.group() decorator. This serves as the main entry point for our CLI application.
3. We define a command called greet using the @cli.command() decorator.
4. The @click.argument('name') decorator defines an argument that the user can provide when running the command. The prompt argument specifies what to display to the user if no name is provided.
5. The greet function takes the name argument and prints a greeting message.
6. The if __name__ == '__main__': block ensures that the cli function is only called when the script is executed directly, not when imported as a module.
## **Running the CLI**
---
Save this code as greet.py and run it from the command line:
```bash
python greet.py
```
The script will prompt you for your name and then print a greeting message.
## **Adding Features**
---
Click allows you to add many features to your CLI application, such as:
- **Options:** You can define options using the @click.option decorator to provide additional configuration to your commands.
- **Subcommands:** Click supports creating nested subcommands for complex applications.
- **Help messages:** Click automatically generates help messages for your commands and options. You can customize these messages to provide clear instructions to your users.
By leveraging Click's features, you can build powerful and user-friendly CLI applications in Python.
## **Next Steps**
---
This is a basic introduction to Click. To learn more about Click's features and explore advanced usage patterns, refer to the Click documentation: [Click Documentation](https://click.palletsprojects.com/en/7.x/).
Happy Clicking! | manavcodaty |
1,867,262 | Template Kubernetes manifests with dynamic data using Gomplate functions | TL;DR: TargetGroupBinding AWS Load Balancer Controler custom resource requires TargetGroup ARN to... | 0 | 2024-05-28T06:39:44 | https://dev.to/krzwiatrzyk/template-kubernetes-manifests-with-dynamic-data-using-gomplate-functions-4egn | kubernetes, gitops, aws | **TL;DR:**
- TargetGroupBinding AWS Load Balancer Controler custom resource requires TargetGroup ARN to be specified
- TargetGroup ARN includes a random ID at the end of ARN to uniquely identify a target group — like:
```
arn:aws:elasticloadbalancing:eu-west-1:<account-id>:targetgroup/<target-group-name>/ba7a3694de41e946
```
- To deploy multiple TargetGroupBindings user is forced to copy & paste TargetGroupARNs from AWS
- Gomplate functions can use TargetGroupName to TargetGroupARN mapping from AWS and template Kubernetes resources in git
- GitHub Actions can be used to automatically prepare a PR if new manifests are supplied or TargetGroup will be recreated on AWS
**To learn how to implement that, read the full story:**
https://blog.windkube.com/template-kubernetes-manifests-with-dynamic-data-using-gomplate-functions/ | krzwiatrzyk |
1,867,261 | Use SharpAPI for Translating E-Commerce Product Info | In Auctibles, we use SharpAPI to translate product info. Auctibles is built with the Laravel PHP... | 0 | 2024-05-28T06:38:30 | https://dev.to/kornatzky/use-sharpapi-for-translating-e-commerce-product-info-40e8 | laravel, ai, php, ecommerce | In [Auctibles](https://auctibles.com), we use [SharpAPI](https://sharpapi.com) to translate product info.
Auctibles is built with the Laravel PHP framework.
## The Service
We defined a service that will translate a text into a given language.
The service provides a `translate` function that translates the `text` parameter into the required language:
<?php
namespace App\Services;
use GuzzleHttp\Exception\ClientException;
class SharpAPI
{
private $service;
public function __construct()
{
}
public function translate(string $text, string $to_language)
{
try {
$statusUrl = \SharpApiService::translate($text, $to_language);
} catch(ClientException $e) {
$rsp = $e->getResponse();
return ['flag' => null];
}
$result = \SharpApiService::fetchResults($statusUrl);
$res = json_decode($result->getResultJson());
return ['flag' => true, 'content' => $res->content];
}
}
The function returns an associative array, with:
* `bool flag` - signifying success or failure
* `content` - translated content
## The Job
Because calling SharpAPI takes time, we do this asynchronously in a job, once the user saves the product information.
The job takes an `$obj` parameter, which is the product, and an array of `$fields` to be translated. The job iterates over the fields and sends each one to the service for translation.
The object comes from an Eloquent model using [Laravel-Translatable](https://spatie.be/docs/laravel-translatable/v6/introduction). So each field is a JSON array, mapping languages to the value for that language.
<?php
namespace App\Jobs\AI;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldBeEncrypted;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use SharpAPI\SharpApiService\Enums\SharpApiLanguages;
use App\Services\SharpAPI;
class SharpAPITranslator implements ShouldQueue, ShouldBeEncrypted
{
use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
/**
* Create a new job instance.
*/
public function __construct(private string $from_language, private $obj, private $fields)
{
}
/**
* Execute the job.
*/
public function handle(): void
{
// instantiate the service
$sharp_api = new SharpAPI();
foreach($this->fields as $field)
{
foreach(array_keys(config('app.content_languages')) as $to_language)
{
if ($to_language != $this->from_language) {
// get the content for the from_language
$text = $obj->getTranslation($field, $fromlang, true)
$result = $sharp_api->translate(
$text,
$this->sharp_api_language($to_language)
);
if ($result['flag']) {
// store the content for to_language
$this->obj->setTranslation(
$field,
$to_language,
$result['content']
);
}
}
}
$this->obj->save();
}
}
private function sharp_api_language(string $locale): string
{
switch($locale)
{
case 'en':
return SharpApiLanguages::ENGLISH;
case 'pl':
return SharpApiLanguages::POLISH;
}
}
}
| kornatzky |
1,867,260 | Learn about the Best Social App for Chat | Is it not fun to be friends with new people online and share new experiences with each other? Various... | 0 | 2024-05-28T06:34:22 | https://dev.to/limelitevibes/learn-about-the-best-social-app-for-chat-4i9h | Is it not fun to be friends with new people online and share new experiences with each other? Various social apps help you befriend people from all over the world and learn about them. These platforms offer an easy-going registration process and are entirely free to use. Many prominent social apps provide other means of entertainment, such as games, movies, and songs. In addition, some of the [**best social app for chat**](https://limelitevibe.com/) also offer numerous job opportunities. You can choose any platform for yourself which seems helpful for you.
 | limelitevibes | |
1,867,126 | Life [1]- Daily update | As mentioned in my previous post I'm going to write my everyday progress here. And today is May 27,... | 22,781 | 2024-05-28T02:27:12 | https://dev.to/fadhilsaheer/life-1-daily-update-1lje | life | As mentioned in my [previous post](https://dev.to/fadhilsaheer/aah-here-we-go-again-1k08) I'm going to write my everyday progress here.
And today is May 27, and here is what I did.
There was specific bug in a project which I was working on. For this app I used `radix-ui/scrollarea` to be exact I used shadcn-ui scroll area which uses radix ui, the problem was while centering content vertically the scroll wont work. The overflowing content (which is expected to scroll) gets hidden.
I refered many stackoverflow posts & docs, many of them mentioned to use `margin: auto;` for the content inside flexbox (which I used to center). But it didn't work. The more I worked on the more I felt terrible.
At last I created another scrollarea, which centers content with fixed height (in vh) not very appropriate but it is what it is. | fadhilsaheer |
1,867,259 | Digital Experiences: A Catalyst in the Business Growth | Not every door opens on its own. Today, you need the assistance of AI and Digital Experience to open... | 0 | 2024-05-28T06:32:36 | https://dev.to/adjectisolutions/digital-experiences-a-catalyst-in-the-business-growth-4ne8 | liferaydxpexperts, liferaydxpconsultingcompany, liferayplatforms, liferayservicescompany | Not every door opens on its own. Today, you need the assistance of AI and Digital Experience to open the numerous doors on the path of your business. In this era, brands are undergoing personalized and relevant. The reasons for it are inevitable, which include wanting incredible opportunities to grow and connect with customers.
Digital experiences have become an essential part of business and personal interactions. The advent of digital experience platforms has revolutionized the way organizations engage with their customers. These platforms serve as a bridge between businesses and consumers, enabling a seamless, integrated, and personalized experience across various digital platforms. **[Digital Experience Platforms](www.adjecti.com)** (DXPs) and a focus on Digital Customer Experience (DCX) empower businesses to cultivate meaningful customer interactions to contribute to business growth. | adjectisolutions |
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