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1,887,718 | Hello, i am Emile and i need help with coding | Hello, please any one to help me out with coding | 0 | 2024-06-13T21:36:13 | https://dev.to/ngelle_emile_04bfe61f8675/hello-i-am-emile-and-i-need-help-with-coding-270l | Hello, please any one to help me out with coding
| ngelle_emile_04bfe61f8675 | |
1,887,698 | computer science concept in 256 | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-13T21:10:37 | https://dev.to/fabelt14/computer-science-concept-in-256-2al6 | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## **Explainer**
Recursion is a function calling itself to solve smaller instances of the same problem, ideal for tasks like navigating tree structures. It simplifies code but risks stack overflow if not carefully managed with base cases to prevent infinite loops.
## Additional Context
Recursion can lead to infinite loops and stack overflow errors. Proper management of these base cases is crucial to ensure the function terminates correctly and efficiently.
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
<!-- Don't forget to add a cover image to your post (if you want). -->
<!-- Thanks for participating! --> | fabelt14 |
1,887,697 | Blockchain in Fintech: Uses and Early Case Applications | Blockchain, once the domain of niche tech professionals, has now firmly established itself in the... | 0 | 2024-06-13T21:09:02 | https://dev.to/eincheste/blockchain-in-fintech-uses-and-early-case-applications-148a | webdev, cryptocurrency, fintech, beginners | Blockchain, once the domain of niche tech professionals, has now firmly established itself in the financial technology (fintech) landscape. As the financial world undergoes digital transformation, blockchain’s promise of transparency, security, and efficiency stands out. Let’s explore how blockchain is being used in fintech and delve into some early case applications that showcase its potential and practicability.
Simplifying and Securing Transactions
At its core, blockchain is a decentralized ledger that records transactions across multiple computers. This decentralization means no single entity has control, which enhances security and minimizes fraud risks. Traditional financial systems rely on centralized databases that are vulnerable to hacking and errors. Blockchain mitigates these risks by providing a tamper-proof record of transactions.
Consider Ripple, for example. Ripple uses blockchain to facilitate real-time, cross-border payments. Traditional international transfers can take days and incur high fees, but Ripple’s blockchain technology completes transactions in seconds at a fraction of the cost. This efficiency benefits both businesses and individuals who need to send money abroad.
Enhancing Transparency and Trust
Blockchain’s transparent nature is another key advantage. Every transaction recorded on a blockchain is visible to all participants, fostering a level of trust unparalleled in traditional systems. This transparency is particularly valuable in areas like supply chain finance and trade finance, where multiple parties are involved.
IBM’s collaboration with Maersk to create TradeLens, a blockchain-based supply chain platform, exemplifies this. TradeLens provides all participants with a single, immutable record of transactions, enhancing transparency and reducing disputes. This kind of trust and clarity can streamline operations and reduce costs across industries.
Revolutionizing Identity Verification
Identity verification is a critical process in fintech, often plagued by fraud and inefficiency. Blockchain offers a solution through secure digital identities. By storing identity information on a blockchain, individuals can control their data and share it securely with financial institutions.
A notable example is the Sovrin Foundation, which is developing a global public utility for self-sovereign identity. With Sovrin’s blockchain-based system, users can create and manage their digital identities, providing only the necessary information to service providers. This reduces the risk of identity theft and streamlines the verification process.
Facilitating Smart Contracts
Smart contracts are self-executing contracts with terms directly written into code. These contracts run on blockchain, ensuring that agreements are automatically enforced without intermediaries. This innovation can significantly reduce costs and increase efficiency in various financial services.
Ethereum is perhaps the most well-known platform for smart contracts. It allows developers to build decentralized applications (dApps) that automate complex financial transactions. For example, in the insurance industry, smart contracts can automate claims processing, ensuring that payouts are made quickly and fairly when certain conditions are met.
Early Case Applications and Success Stories
1. Bitcoin: The first and most famous use of blockchain, Bitcoin has demonstrated the viability of decentralized digital currencies. Despite its price volatility, Bitcoin has laid the groundwork for countless other blockchain innovations.
2. DeFi Platforms: Decentralized Finance (DeFi) platforms like Compound and Aave use blockchain to offer financial services without traditional banks. Users can lend and borrow cryptocurrencies, earning interest in a completely decentralized manner.
3. Stellar: Similar to Ripple, Stellar aims to facilitate cross-border transactions but focuses more on the unbanked population. Stellar’s blockchain technology allows for affordable and efficient transfers, making financial services accessible to a broader audience.
4. Chainlink: This blockchain project connects smart contracts with real-world data. For instance, it can bring weather data into a smart contract for parametric insurance, automating payouts based on predefined weather conditions.
Conclusion
Blockchain’s integration into fintech is not just a technological evolution but a fundamental shift in how financial transactions and services are conducted. From simplifying cross-border payments to enhancing transparency and trust, blockchain is poised to redefine the financial landscape. Early applications in platforms like Ripple, TradeLens, and Ethereum showcase the transformative potential of this technology. As blockchain continues to mature, its impact on fintech will undoubtedly expand, driving innovation and efficiency in ways we are only beginning to understand. | eincheste |
1,887,696 | Decoding Backend Architecture: Crafting Effective Folder Structures | In the digital landscape, where web and mobile applications reign supreme, the backend serves as the... | 0 | 2024-06-13T21:08:29 | https://dev.to/mahabubr/decoding-backend-architecture-crafting-effective-folder-structures-in7 | webdev, backend, architecture, structure | In the digital landscape, where web and mobile applications reign supreme, the backend serves as the unseen architect, laying the foundation for seamless user experiences. A crucial aspect of backend development lies in crafting a well-organized folder structure, akin to the blueprint of a skyscraper, guiding developers through the intricacies of code and data management. Let's delve into the depths of backend folder structures, unraveling their significance and exploring best practices.
## The Anatomy of Backend Folder Structures
At its core, a backend folder structure mirrors the logical organization of code, databases, configurations, and resources. While variations exist based on frameworks, languages, and project requirements, certain components are fundamental across the board:
**Root Directory:** The starting point housing all backend-related files and folders. It encapsulates the entirety of the backend infrastructure, acting as a gateway to various modules and components.
```
/backend
├── config
├── controllers
├── models
├── routes
├── middleware
├── services
├── tests
├── public
└── README.md
```
**Configurations:** Configuration files orchestrate the behavior of backend services, encompassing settings for databases, server parameters, environment variables, and third-party integrations. Segregating configurations into a dedicated folder ensures easy access and management.
```
/config
├── database.js
├── server.js
├── environment.js
└── third-party.js
```
**Controllers:** Controllers serve as intermediaries between incoming requests and backend logic, handling data manipulation, business logic, and response generation. Organizing controllers into a separate folder promotes modularity and enhances code maintainability.
```
/controllers
├── userController.js
├── productController.js
└── orderController.js
```
**Models:** Models represent the data structures and business entities manipulated by the backend. Whether dealing with users, products, or transactions, housing models within a designated folder fosters clarity and facilitates database interactions.
```
/models
├── User.js
├── Product.js
└── Order.js
```
**Routes: **Routing mechanisms define the mapping between incoming requests and corresponding controller actions. A centralized folder for routes streamlines request handling and promotes a clear separation of concerns.
```
/routes
├── userRoutes.js
├── productRoutes.js
└── orderRoutes.js
```
**Middleware:** Middleware functions intercept incoming requests, executing custom logic before passing control to route handlers. Grouping middleware into a standalone folder encourages reusability and simplifies request processing pipelines.
```
/middleware
├── authentication.js
├── validation.js
└── logging.js
```
**Services:** Auxiliary functions and services, such as authentication, validation, logging, and error handling, find their home within this folder. Centralizing common functionalities enhances code reuse and accelerates development cycles.
```
/services
├── authService.js
├── emailService.js
└── loggingService.js
```
**Tests:** Quality assurance is paramount in software development, and dedicated folders for tests facilitate automated testing of backend components. Segregating test suites by functionality aids in comprehensive test coverage and fosters a culture of testing.
```
/tests
├── user.test.js
├── product.test.js
└── order.test.js
```
**Public Assets:** Static assets, such as images, stylesheets, and client-side scripts, are often served directly to users. Placing these assets in a designated folder ensures accessibility and simplifies deployment workflows.
```
/public
├── images
├── styles
└── scripts
```
## Best Practices and Considerations
While the structure outlined above provides a solid foundation, adapting it to project-specific requirements and frameworks is essential. Here are some best practices and considerations to guide your backend folder structuring endeavors:
1. Consistency: Maintain consistency in naming conventions, folder structures, and file organization across projects to enhance code readability and developer onboarding.
2. Scalability: Design folder structures with scalability in mind, anticipating future expansion and accommodating new features without introducing clutter or complexity.
3. Documentation: Document the rationale behind folder structures, outlining the purpose of each directory and its contents. Clear documentation fosters understanding and streamlines collaboration among team members.
4. Modularity: Embrace modularity by breaking down complex functionalities into smaller, manageable modules. Each folder should encapsulate a cohesive set of functionalities, promoting code reusability and maintainability.
5. Version Control: Incorporate backend folder structures into version control systems, such as Git, to track changes, collaborate effectively, and ensure code integrity across development environments.
6. Security: Implement security measures, such as access controls, encryption, and data sanitization, at the folder level to safeguard sensitive information and protect against security threats
## Conclusion
In the realm of backend development, the folder structure serves as a compass, guiding developers through the labyrinth of code and configurations. By adhering to best practices and adopting a modular, scalable approach, backend folder structures lay the groundwork for robust, maintainable applications. As technology continues to evolve, mastering the art of folder structuring remains a fundamental skill for backend engineers, enabling them to build resilient and adaptable systems that stand the test of time.
| mahabubr |
1,887,695 | THAT Conference: THAT's Where the Best Networking Is At! | Introduction Networking is a proven method for career advancement, and the most effective... | 0 | 2024-06-13T21:06:29 | https://www.htmlallthethings.com/blog-posts/that-conference-thats-where-the-best-networking-is-at | conference, career, codenewbie, interview | ### **Introduction**
Networking is a proven method for career advancement, and the most effective way to network is in person!
This article covers a special guest Podcast with Clark Sell, the visionary founder of THAT Conference, the largest family-friendly tech event in the US. Tech industry experts Matt Lawrence and Mike Karan led the exclusive interview, exploring the unique experiences, opportunities, and vibrant community that make THAT Conference a must-attend event for tech enthusiasts and their families.
Whether you want to finally meet the people in your network, the tech celebrities you follow, companies you'd like to work for, or inspire your children to pursue a tech career, THAT Conference is where the best networking is at!
**Topics covered in this article include:**
* The unique community and year-round engagement of THAT Conference
* The Professional and Family Tracks and their benefits
* Networking opportunities and personal growth at THAT Conference
---
---
### What is THAT Conference?
Clark describes THAT Conference as an event for software engineers and their families. But it's much more than just a conference! It consists of a group of supportive members that Clark refers to as "a tribe." Although the THAT Conference event happens only twice a year, their community remains active 365 days a year!
Clark's goal is to bring people together and help them network with each other. So, throughout the year, conference attendees will have a supportive community to aid in their growth and progress throughout the year, all leading up to the in-person event, making it feel like a family reunion!
The THAT Conference event includes four days of workshops, sessions, open spaces, family events, and networking activities. It has a camping theme, including camp-style food and festivities, and takes place at Kalahari Resorts in Texas and Wisconsin. All of the digital events are accessible via YouTube.
<iframe width="928" height="522" src="https://www.youtube.com/embed/_aO4uBrJGFU"></iframe>
{% youtube _aO4uBrJGFU%}
---
### About Clark Sell
Clark Sell has been in software engineering for over 25 years. He has worked for several companies, notably Allstate, during the "dot-com" boom, utilizing .NET, where he used his architecture and enterprise skills. He also spent nearly ten years at Microsoft in engineering, including two years in an "Evangelist" role, a position once held by his friend, tech celebrity, and conference speaker James Q. Quick!
In addition to creating THAT Conference, Clark founded [Unspecified](https://unspecified.io/), a company that works with businesses to build software that supports building communities.
---
### Why participate in THAT Conference?
#### Build your network
I have seen time and time again how a strong network can greatly help navigate your career. From your first job to new opportunities and even recovering from layoffs, your personal social network is an invaluable resource.
In my network, Brian Morrison secured a new job at "Clerk" just days after being laid off, and James Q. Quick received numerous guaranteed job offers from his network after being laid off from PlanetScale. Additionally, I continue receiving many opportunities through my network, including paid writing, speaking engagements, and code review gigs. There's just no substitution for a strong network that can offer the speed and security needed to navigate career transitions effectively!
**Participating in THAT Conference is an opportunity to solidify relationships with the people already in your network by meeting them in person, which puts a personality behind the social avatar image. It is also a great way to expand your network by meeting new people.**
THAT Conference's rules of engagement foster a welcoming, laid-back atmosphere, making it easy to approach others and start conversations. Clark uses a Pac-Man analogy, where a piece is intentionally left out to create space for others to join, such as leaving empty seats at a table.
*During a THAT Conference Twitter/X Space, someone compared the vibe to kindergarten, where a child walks up to another and asks if they would like to be friends, then starts conversing. Another person mentioned he met and talked with someone, only to realize later that the laid-back, approachable individual was actually a tech celebrity with thousands of followers!*
#### Pursue new employment opportunities
Another great reason for attending THAT Conference is to talk directly with company representatives. Companies such as Auth0 often set up booths, providing a chance to discuss job opportunities, industry trends, and potential collaborations.
#### Bring and encourage your children
A fantastic reason to attend is that you can bring your whole family! The Family track makes THAT Conference unique, encouraging attendees to bring their families for educational workshops and activities. It offers children exposure to the tech industry, opportunities to socialize with peers, and the opportunity to see their parents' presentations, inspiring them to pursue tech careers and even land internships.
#### Diverse lineup of workshops and sessions
With a diverse lineup of workshops and sessions, you can tailor your experience to match your interests and career goals. Notable past speakers, such as Danny Thompson and James Q. Quick, have shared their invaluable insights, making the conference an enriching experience for all attendees.
#### Invest in yourself and have fun!
**It's never too early to attend a tech conference! Whether you are just getting started in web development, an intermediate, or a seasoned professional, the best time to attend is right now! The faster you can learn from others' mistakes, master networking, and seize unexpected opportunities, the faster you will further your personal growth and propel your career!**
Attending a conference lets you connect with others in a way that isn't possible online. The vibe and energy of in-person events, body language, firm handshakes, and randomly meeting new people you "click with" are just a few examples of what to expect (after all, you won't meet random people by them walking into your Zoom meeting!😂)
*The people you meet at THAT Conference can be important for your future career! They can provide mentorship, job referrals, and chances to work together, which can greatly affect your professional career path!*
Most importantly, you can have fun! They have a waterpark, pig roast, smores, and more for social activities!
#### Choose your own THAT Conference adventure!
THAT Conference offers many fun activities, from meeting industry leaders in person to hands-on workshops, networking in the hallways, and family-friendly events. It provides a unique environment for both personal and professional growth. You can build your network, find new job opportunities, and even inspire your kids. Invest in yourself and have fun while propelling your career forward!
---
💡 **Tip:** *For a more comfortable experience, plan to meet people from your network whom you haven't met in person yet. When you're there, make sure your group creates a welcoming atmosphere for others to join you. Also, split into pairs to explore and meet new people!*
---
### Why am I excited about THAT Conference?
I've been learning how to program as a self-taught developer for several years now. During that time, I've had the pleasure of networking with fellow self-taught students, teachers at coding schools, and tech celebrity teachers whom I learn from! Most of these peers are active on what is known as Tech Twitter, and most of them attend and even speak at THAT conference! 🤯 So, in addition to it being an informative learning experience, it is an opportunity to meet everyone I've been interacting with online for the first time in person.
Although I haven't attended THAT Conference in person yet, I have followed it closely on social media and watched the live and recorded YouTube events. I must say, the wonderful vibe of this conference is evident, even on video!
***As a passionate writer, I particularly enjoyed Braydon Coyer's presentation on boosting your blog content with SEO!***
<iframe width="928" height="522" src="https://www.youtube.com/embed/VS01DHSnGV0"></iframe>
{% youtube VS01DHSnGV0%}
---
#### Conference Speaker: James Q. Quick
*(Content Creator, Keynote Speaker, and DevRel Consultant)*
This wouldn't be a modern-day article if the topic of AI didn't come up, and THAT Conference tackled that head-on with a vivid and insightful keynote presentation by [James Q. Quick](https://www.youtube.com/c/jamesqquick)!
**Will AI take developer jobs? How does AI affect learning? Where does AI fall short? James covers all of this and more as he skillfully teaches and guides us through the ever-changing tech landscape so we can excel in our careers!**
*I covered James's keynote presentation in issue 97 of my Self-Taught the X Generation blog:* [*AI and Developer Experience: Insights from James Quick at That Conference*](https://selftaughttxg.com/2023/07-23/ai-and-developer-experience-insights-from-james-quick-at-that-conference/)
---
#### Conference Speaker: Kevin Powell
*(CSS Evangelist, A.K.A. The King of CSS!* 👑\*)\*
**I must say that I was disappointed to miss**[Kevin Powell](https://www.youtube.com/@KevinPowell)**'s debut presentation at THAT Conference because, and I quote, it never occurred to him to record it until he saw others at the conference doing it???** 🎥😂
*Oh, well! Hopefully, he will record his upcoming presentation at the Wisconsin Dells 2024 conference (July 29th to August 1st, 2024)!*
---
#### Various conference speakers
Although there are many speakers at THAT Conference events, I noticed that not all of the YouTube presentations are available on the official conference website. So I posted on Twitter/X asking if speakers recorded their presentations so I could watch and share them.
**So, without further ado, here is a curated list of the exclusive presentations shared by the speakers who recorded them:**
> \- Brian Morrison: I did!
>
> * Brian Morrison: [Building Custom GitHub Actions with Docker • THAT Conference TX '24](https://www.youtube.com/watch?v=rmrEaEptUWw)
>
---
> \- Nick Nisi: I recorded mine!
>
> * [Componentizing Application State - THAT Conference Texas 2024](https://www.youtube.com/watch?v=4-msZqqrN1A&list=WL&index=2&t=10s)
>
---
> \- Braydon Coyer: For those who missed my talk at @ThatConference, you can now catch it on YouTube!
>
> * [Choosing Blog Topics - THAT Conference January 2024](https://www.youtube.com/watch?v=VS01DHSnGV0)
>
---
> \- Emmy Cao: I didn't record my THAT conference talk, but here's a shorter version of the subject I did at @jsheroes 🙂:
>
> * [ADHD in the Digital World - Emmy Cao | JSHeroes 2023](https://www.youtube.com/watch?v=kB1EUVsciE8)
>
---
###### **Shashi Lo - Senior UX Engineer at Microsoft ( THAT Conference Texas - 2024 )**
---
💡 **Tip:** *Shashi didn't record his presentation and told me I would have to come in person to hear it! So, if you're fortunate enough to catch one of his invaluable live presentations and want to get on his good side, he absolutely loves pizza with pineapple topping!* 🍕🍍😂
---
### The Professional Track
The Professional Track at THAT Conference is designed for tech professionals eager to deepen their knowledge and expand their skills. This track features a diverse lineup of sessions, workshops, and keynotes led by industry experts. You can expect to explore cutting-edge technologies, best practices, and innovative solutions that are shaping the tech landscape.
Participants will have the opportunity to engage in hands-on workshops, where they can dive deep into specific topics and gain practical experience. These sessions are tailored to different skill levels, ensuring that everyone, from beginners to seasoned professionals, can find valuable content.
Networking is a cornerstone of the Professional Track. The conference fosters a collaborative environment where attendees can connect with like-minded professionals, share insights, and build lasting relationships. The hallway conversations, open spaces, and social events provide ample opportunities for meaningful interactions.
In addition to technical sessions, the Professional Track also addresses soft skills essential for career growth. Topics such as leadership, communication, and personal development are covered to help attendees become well-rounded professionals.
Whether you're looking to stay ahead of industry trends, solve complex challenges, or simply connect with peers, the Professional Track at THAT Conference offers a comprehensive and enriching experience that will propel your career forward.
---
### The Family Track
The Family Track aims to create exposure for S.T.E.M.-related topics (Science, Technology, Engineering, and Math education).
**Clark highlights the benefits of bringing your children to THAT Conference via the Family Track. He explains that it offers them exposure to the tech industry, opportunities to socialize and learn with other children, and even the chance to see their parents' presentations if they are speakers. This positive exposure at an early age can inspire them to pursue a career in tech!**
Young adults have even secured internships through THAT Conference sponsors! Clark also mentions that sponsors have the opportunity to convince your family as a whole why you should work for their company, rather than the traditional interview process where you come in alone. This sounds like a much better hiring process to me! 😉
The Family Track's social activities include Happy Hour and the waterpark, which are excellent opportunities for families to meet!
*Children even have the opportunity to become THAT Conference speakers and give their own presentations!*
#### Scratch: A programming language used in STEM education
I can personally recommend a great way to encourage your children to get involved in tech: teach them Scratch, a programming language designed by software engineers at the Massachusetts Institute of Technology (MIT).
*My daughter completed an online course on Scratch through* [*Create and Learn*](https://www.create-learn.us/) *and earned a coding certificate with high-performance honors! Maybe you'll see her giving a Scratch presentation at a future THAT Conference.* 😊
You can learn more about Scratch and see some of our creations in my article: [Review: Scratch (programming language)](https://selftaughttxg.com/2021/02-21/Review-Scratch/)
---
### Call for speakers
**THAT Conference holds open calls for speakers twice a year, during two-month periods.***(The submissions for the upcoming Wisconsin 2024 were held Saturday, December 30, 2023, through Monday, March 4, 2024)*
**THAT Conference seeks sessions that last an hour, half-day, or full-day and keynotes that provide value to the community. The topics should interest developers, designers, testers, business owners, site builders, community organizers, and others.**
**You can apply to speak for the following audiences and formats:**
* Professional & Family Formats
* Standard Sessions
* Pre-Conference Workshops
* Keynotes
#### Professional & Family Formats
THAT Conference is a professional tech conference offering a great experience for kids and families. Your session can be for the professional track or the family.
#### Standard Sessions
Standard sessions are 60 minutes long, including time for questions. A 30-minute break between each session encourages important hallway conversations.
#### Pre-Conference Workshops
Half-day (four-hour) or full-day (eight-hour) workshops are scheduled for the day before THAT Conference. You will need to provide attendees with a clear schedule of your topics.
#### Keynotes
Can you give a 90-minute speech on something you're passionate about? You will have a live audience of over 1,000 people! They seek topics that will inspire, energize, and help attendees appreciate the world's diversity.
---
### What does THAT Conference look for in potential speakers?
**To become a speaker at THAT Conference, you will need a presentation that includes your unique perspective and experiences. Clark tells us to "be what you can't Google!" For example, a presentation on 15 things you wish you knew before learning React, including your ups and downs, wins and losses, and other advice you can provide from your personal experiences, will be valuable for the audience.**
Additionally, you can get creative and teach a well-known topic from a new angle or perspective, such as [Sara Shook's](https://thatconference.com/members/shook) upcoming "[Decoding Color](https://thatconference.com/activities/SpKWfT2zsCtggstfx8bp)" presentation!
*Decoding Colors: "A Deep Dive into Hex and RGB(A) Color Models." Expand your knowledge of two of the most commonly used color models - Hex and RGB, learn how to convert the models programmatically, and discover how these concepts can be practically applied to your projects.*
---
### Workshops
The workshops at THAT Conference are hands-on sessions where you can engage deeply with specific topics. They are offered as half-day (four-hour) or full-day (eight-hour) pre-conference workshops.
These workshops offer a space where participants can work together, interact, and follow practical steps to improve their skills. The content is designed to be engaging and hands-on, making sure attendees gain real-world experience.
*Clark illustrates how the workshops function by discussing the upcoming "Mastering Vue.js - A Comprehensive Introduction," taught by J.D. Hillen (WISCONSIN DELLS 2024).* This workshop offers a hands-on exploration of Vue.js's fundamentals and advanced concepts. It covers the essentials for getting started and compares it with other popular JavaScript frameworks like React, Angular, and Svelte. The session includes code examples and interactive exercises for a practical learning experience.
**In the workshops, you will:**
* Get your hands on the keyboard
* Work together with your "tribe" of people
* Interact by going through tutorials step-by-step
**These collaborative and interactive workshops can help you and your fellow participants bond and work together, enhance learning and growth, and better prepare you for the fast-changing tech world!**
---
💡 **Tip:** *Follow Clark, THAT Conference, and the conference speakers on Twitter/X for discounts! I've even seen FREE tickets given away in Twitter/X Spaces!*
---
### How to participate
There are plenty of ways to participate in THAT Conference, even if you can not attend in person.
**Ways to participate:**
* Create an account
* YouTube channel
* Be an attendee
* Become a speaker
* Become a sponsor
* HELP SPREAD THE WORD!
#### Create an account
THAT Conference offers a networking system to help attendees connect with each other. By creating an account, you can increase your visibility among other campers through a shared profile. This profile can be shared with sponsors or other attendees, making networking easier. You can request to connect with another camper at any time, either through the website if their profile is public or by using their badge number at an event. The goal is to make connections simple.
Additionally, having a profile allows you to save sessions you want to attend, create a custom iCal of your favorites, and even purchase tickets.
###### Feel free to connect with me! [Michael Larocca](https://thatconference.com/members/michaellarocca)
---
---
#### YouTube channel
You can watch the speakers' presentations on the [THAT Conference's YouTube channel](https://www.youtube.com/@ThatConference). You can also follow the speakers on social media as they often record and share their presentations.
#### Be an attendee
The most effective way to network is in person! Attend one of the conferences in person to meet the people in your network, the tech celebrities you follow, and the companies you'd like to work for! If you have children, there are plenty of activities and opportunities that can inspire them to pursue a tech career!
#### Become a speaker
Can you articulately share unique perspectives and personal experiences that will benefit others through your insights and lessons? Then consider becoming a speaker at THAT Conference!
**Perks for selected speakers:**
* **Conference Ticket:** Attend all 4 days for FREE! It also includes all conference meals, the Pig Roast, and all social networking activities!
* **Hotel Accommodations:** You will be reimbursed for your room at the resort, up to a maximum of 3 nights per family!
* **Camp Swag:** Got swag? THAT Conference literally got you covered!
#### Become a sponsor
Do you work for a company, own a start-up, or run an organization looking to promote itself and connect with its target audience? Then consider sponsoring THAT Conference!
*Check out the following insightful video from previous THAT Conference sponsors to learn more about it:*
<iframe width="343" height="610" src="https://www.youtube.com/embed/vn_WPN3iTCw"></iframe>
{% youtube vn_WPN3iTCw %}
#### HELP SPREAD THE WORD! 📢
*The best and easiest way to participate is to help spread the word about THAT Conference! As a not-for-profit event, THAT Conference relies heavily on word of mouth. Please support the grassroots movement!*
---
### WISCONSIN DELLS, WI / JULY 29TH - AUGUST 1ST, 2024
Join the upcoming four-day summer camp for developers passionate about learning all things mobile, web, cloud, and technology!
#### Keynote Speakers:
* [**Kent Dodds**](https://thatconference.com/members/kentcdodds)**:** Instructor, [EpicWeb.dev](http://EpicWeb.dev)
* [**Mark Thompson**](https://thatconference.com/members/marktechson)**:** Sr. Developer Relations Engineer, Google
* [**June Syndesi Kramer**](https://thatconference.com/members/junesyndesikramer)**:** Mental Health Educator, Researcher, and Trauma-informed Wellness Counselor currently in Doctorate, Syndesi Wellness
---
### The Hallway Track
Clark started a live stream called **The Hallway Track** on THAT Conference's YouTube channel. The stream aims to capture the vibe of meeting people in the hallway during a conference and striking up a casual conversation. Be sure to check it out!
---
### THAT Conference links
* 🔗 [Website](https://thatconference.com/)
* 🔗 [YouTube](https://www.youtube.com/@ThatConference)
* 🔗 [Slack](https://thatconference.com/my/profiles/slack)
* 🔗 [Discord](https://that.community/)
* 🔗 [that.land](https://that.land/m/whois)
---
### **Be sure to listen to the Podcast episode!**
[**Listen here!**](https://www.htmlallthethings.com/blog-posts/that-conference-thats-where-the-best-networking-is-at)
#### **Be sure to check out HTML All The Things on socials!**
* [**Twitter**](https://twitter.com/htmleverything)
* [**LinkedI**](https://www.linkedin.com/company/html-all-the-things/)[**n**](https://www.tiktok.com/@htmlallthethings)
* [**TikT**](https://www.tiktok.com/@htmlallthethings)[**ok**](https://www.instagram.com/htmlallthethings/)
* [**Instagram**](https://www.instagram.com/htmlallthethings/)
---
## **Learn with Scrimba!**
* Learn to code using Scrimba with their interactive follow-along code editor.
* Join their exclusive discord communities and network to find your first job!
* Use our [**affiliate link**](https://scrimba.com/?ref=htmlallthethings)
*This article contains affiliate links, which means we may receive a commission on any purchases made through these links at no additional cost to you. This helps support our work and allows us to continue providing valuable content. Thank you for your support!*
---
#### ***Sponsored content: The original publisher kindly sponsored this article, allowing me to share my expertise and knowledge on this topic.***
---
### **My other related articles**
* [**AI and Developer Experience: Insights from James Quick at That Conference**](https://selftaughttxg.com/2023/07-23/ai-and-developer-experience-insights-from-james-quick-at-that-conference/)
* [**Amazing Conferences for Developers in 2023**](https://selftaughttxg.com/2023/01-23/amazing-conferences-for-developers-in-2023/)
* [**Supermaven: The FREE GitHub Copilot Alternative**](https://www.htmlallthethings.com/blog-posts/supermaven-the-free-github-copilot-alternative)
* [**A Comprehensive Guide to CSS: Insights from the King of CSS, Kevin Powell**](https://www.htmlallthethings.com/blog-posts/a-comprehensive-guide-to-css-insights-from-the-king-of-css-kevin-powell)
* [**Thriving in Tech: Securing Your First Job, Leveraging Side Hustles, and Overcoming Layoffs**](https://www.htmlallthethings.com/blog-posts/thriving-in-tech-securing-your-first-job-leveraging-side-hustles-and-overcoming-layoffs)
* [**Transitioning from Developer to Developer Advocate: A Guide for Aspiring Tech Professionals**](https://www.htmlallthethings.com/blog-posts/transitioning-from-developer-to-developer-advocate-a-guide-for-aspiring-tech-professionals)
* [**From Learning to Earning: A Comprehensive Guide to Navigating Your Tech Career**](https://www.htmlallthethings.com/blog-posts/from-learning-to-earning-a-comprehensive-guide-to-navigating-your-tech-career)
---
### **Conclusion**
THAT Conference is a unique, family-friendly tech event with a camping theme that provides valuable networking opportunities, educational workshops, and a supportive community. It's held annually in Texas and Wisconsin, making it accessible to a wide audience.
The conference offers both a Professional Track for tech professionals and a Family Track to engage children and families. Attendees can build networks, explore new job opportunities, and inspire their children to pursue tech careers. The community remains active year-round, fostering continuous growth and connection, making it feel like a family reunion when you attend in person!
One of the standout features is the inclusive atmosphere, where everyone from beginners to seasoned professionals can find valuable content and make meaningful connections. The hallway conversations, open spaces, and social events provide ample opportunities for networking in a laid-back environment.
Additionally, the Family Track offers children exposure to the tech industry through educational workshops and activities, encouraging them to socialize with peers and see their parents' presentations (if they're speakers). This positive exposure can inspire them to pursue tech careers and even land internships!
The community stays active year-round, so you're never alone on your professional journey. Whether you want to stay ahead of industry trends, solve challenges, or connect with peers, THAT Conference offers an enriching experience to boost your career. Invest in yourself and have fun! Join us at THAT Conference and become part of this vibrant community!
*A special thank you to Clark Sell and all of the THAT Conference speakers and attendees. You are all responsible for creating this amazing community and helping all of us through personal, professional, and career growth!*
**But don't just take my word for it! Be sure to read the testimonials below from THAT Conference’s speakers and attendees!** ⬇️
---
### 🏆 Testimonials
*"Spoke at, and so happy that I did, but not even for the speaking opportunity, but for all the people I met while there.*
*I connected with a bunch of people I'd only known online, but also made new friendships with people I'd never have known if I didn't attend."*
> Kevin Powell
---
*"Gosh, I’m not sure where to start. I started attending That Conference at their very first conference when I was 9 years old. The family track has always been amazing, but a few years later, Clark Sell wanted family speakers, too, which became me when I was 13.*
*I’ve presented at every THAT Conference since. Texas and Wisconsin. This will be my 9th year presenting at THAT Wisconsin, and it has led me to find success in competitive speech, school, and work opportunities I never could have imagined as the THAT intern."*
> Savannah Boedie
---
*"That Conference may be the only tech conference where you go for the content but stay (often long into the night!) for the people.*
*Worth every penny of the ticket price"*
> Braydon Coyer
---
*"THAT is a rare tech conference. Clark does a great job creating opportunities to network with others. The majority of the people who attend and speak genuinely want to connect and make new friends.*
*You may attend alone or only know a few people attending, but you come home with a family."*
> Shashi Lo
---
*"I've been to every THAT Conference except one, and it's been great watching it start and grow over the years.*
* *The content is good with people who are actually shipping code instead of just talking about it*
* *The vibe is great where it feels more like an odd family reunion than a normal tech conference.. that includes the geekling (kids) track where they can play with and see the concepts that make our world work*
* *The open spaces give us a chance to continue topics and explore new ones with high signal and little noise*
* *I've been able to meet & spend time with former colleagues, meet current customers & users, and even meet future coworkers at THAT to understand them as more than flat faces on a screen*
* *There's a bar in the hot tub*
*Other than that, it's pretty boring ;)"*
> Danger Casey
---
*"THAT is more than a conference. You’ve probably heard that, but it’s true. When I spoke at my first THAT in 2023, I was struggling silently. And because of my experience with THAT, my life changed. It wasn’t about networking, it was meaningful connections. It was about making tech a good space for everyone. It was about making space for me even when I felt broken. I wish I could give back to THAT in the way it gave back to me. I made connections at THAT who I still consider collaborators and friends today that have enabled me to find new and more ways to succeed in my career. I encourage everyone out there to make it a priority; because THAT recognizes people before tech and that’s the only way to grow."*
> BekahHW
---
*"I had never spoken at a major tech conference, but the first time I attended, a speaker suggested I consider speaking. Since then, I've given a variety of talks, and I've enjoyed it all. When I first attended, I had no idea that I'd find such a great community, but I'm thankful!"*
> Ross, Son of Lars
---
*"That Conf is a rare breed of conferences where you step into the conference and feel like everyone is family. There are always 'vibes' for a conference and THAT Conf vibe is so amazing and family friendly. The content and speakers is top notch as well!!"*
> Taylor Desseyn
---
*“One of my favorite events of the year! The people, the conversations, the water park!! It’s just different than any other event I’ve been to. Everyone needs to experience what THAT has to offer!”*
> James Q. Quick
---
**Let's connect! I'm active on** [**LinkedIn**](https://www.linkedin.com/in/michaeljudelarocca/) **and** [**Twitter**](https://twitter.com/MikeJudeLarocca)**.**
###### **You can read all of my articles on** [**selftaughttxg.com**](http://selftaughttxg.com)
--- | michaellarocca |
1,887,694 | How I manage my enormous`class` attributes in Tailwind projects | I'm curious what sorts of workflows you might have developed for dealing with oodles and oodles of... | 0 | 2024-06-13T21:04:55 | https://dev.to/aaronmw/wanted-vscode-andor-prettier-plugin-to-ease-the-suffering-of-editingclass-attributes-in-a-tailwind-project-5hei | tailwindcss, vscode | I'm curious what sorts of workflows you might have developed for dealing with oodles and oodles of classes on a single element, often amongst many others within a single component.
I figured I'd share what I currently do, and maybe others can show me how they'd do it differently. Or maybe I can at least inspire someone else with my examples:
```typescript
import { ComponentProps, useState } from 'react'
import { twMerge } from 'tailwind-merge'
// A TypeScript template literal tag function for Tailwind classes
// Usually imported from a folder of other utilities
function tw(strings: TemplateStringsArray, ...values: any[]) {
return String.raw({ raw: strings }, ...values)
}
// Sometimes this is exported from a file of its own if things get hairy
// For even simpler components, this wouldn't even be a function
// and instead I'd just have the object itself, named `classNames` or something
function getClassNames({ someCondition = false }) {
return {
container: twMerge(
someCondition &&
`
bg-red-400
text-red-600
`,
`
flex
h-full
flex-col
items-center
justify-center
`,
),
someSemanticallyNamedElement: tw`
text-lg
`,
}
}
// Most of my components still accept a className prop,
// so I merge it with the lovely `tailwind-merge` library
export function MyComponent({
className,
...otherProps
}: ComponentProps<'div'>) {
const [someCondition, setSomeCondition] = useState(false)
const classes = getClassNames({ someCondition })
return (
<div
// ⛙ Merge the classes. The incoming classes take precedence
// but sometimes I pass them first if I need to ensure
// specific classes can't be overridden
className={twMerge(classes.container, className)}
{...otherProps}
>
<div className={classes.someSemanticallyNamedElement}>Hello, world!</div>
</div>
)
}
``` | aaronmw |
1,887,693 | AWS Cloud Resume Challenge | Who I Am Hello everyone! My name is Tariq Moore and I’m a Web Developer, aspiring Cloud... | 0 | 2024-06-13T21:04:17 | https://dev.to/tariq_moore/aws-cloud-resume-challenge-2676 | webdev, aws, awschallenge, devops |
## _Who I Am_
Hello everyone! My name is Tariq Moore and I’m a Web Developer, aspiring Cloud Engineer, and DevOps Engineer. This is my first time writing a blog post, so I hope you enjoy this deep dive into the Cloud Resume Challenge, and my thought process while completing it!
A few weeks ago, I acquired my AWS Cloud Practitioner Certification which provided a high-level overview of key services like S3, CloudFront, Route 53, EC2, and more. I’ve decided to aim for the AWS Developer and Solutions Architect certifications but needed a way to solidify the knowledge I gained. In comes the Cloud Resume Challenge created by Forrest Brazeal.
## _Cloud Resume Challenge…?_
“Cloud Resume Challenge is a 16-step hands-on project designed to help you bridge the gap from cloud certification to cloud job. It incorporates many of the skills that real cloud and DevOps engineers use in their daily work” – Forrest Brazeal
## _AWS Cloud Resume Challenge_
These are the steps to this challenge:
1. Acquire Certification
2. HTML
3. CSS
4. Static Website Configuration
5. HTTPS
6. DNS (Optional, but recommended)
7. JavaScript
8. Database
9. API Creation
10. Python
11. Tests
12. Infrastructure as Code (via Terraform)
13. Source Control (GitHub)
14. CI/CD (Backend)
15. CI/CD (Frontend)
16. Blog Post Creation
### _AWS Certification_
The first step is to obtain an AWS cert. Any of the certifications will suffice, but for beginners it’s generally recommended to have the AWS Cloud Practitioner Certification for the foundational knowledge. I obtained my Cloud Practitioner cert last month!
### _Creating the Website_
The next step is to create a static website utilizing HTML, CSS, and JavaScript for your resume. I had deployed a portfolio website back in 2020 using GitHub Pages but decided to start fresh for this challenge. To save time developing, I did some research for website templates that I could customize later. I found the website HTML5up.net, which provides fully responsive websites with source code, and I decided on the “Hyperspace” template. After customizing the layout and adding more character to the site (like coffee and bears), I had a fully functional resume site.
### _Website Deployment_
From here we start diving into the AWS services beginning with S3. I created an S3 bucket and configured the bucket policy for static website hosting. This was good and all but when accessing the site it used HTTP instead of enforcing HTTPS. Additionally, S3 buckets are regional instead of global. Someone accessing the site would have to connect to the US region but what if they were in Japan?
To reduce latency and enforce HTTPS, I incorporated CloudFront. With CloudFront my website files would be cached globally in CloudFront edge locations. Someone from Japan or South America would receive the files from a location closer to them, instead of having to access the US region.
### _Connecting DynamoDB, Lambda, and API Gateway_
The challenge asks us to create a section of the website to display how many people viewed our website. To accomplish this, I created a DynamoDB table with one row, an ID column to act as the primary key, and a number column that will be incremented. To increase the number each time someone visits the site, I would need something to pull the value, update it, and return said value to my JS code. In comes the Lambda and API Gateway combo.
I designed my code in Python but ran into issues when returning a response. Here I learned more about status codes, CORS, and returning the proper headers/body in Python that’s readable for JSON.
I ran into issues with headers/body because my Python code was returning a “Decimal” from DynamoDB. After running the code, I would get JSON Error: “Not Serializable.” To fix this, I researched a Decimal Encoder class to turn my Decimal into a string.
The next problem I had was with CORS. When accessing the API Gateway URL, I constantly got a ‘No Access-Control-Allow-Origin Header Present’ error. I was sure that I set up the access. The console showed it being allowed properly, but still an error. Redeployed, made small changes, tried a different origin, attempted a wildcard with “*,” and still nothing.
The problem was how I created my API Gateway resource in Terraform.
It was designed as a proxy resource. This led me down a rabbit hole of sorts for some hours. Eventually, I figured since it is set up as a proxy, my Lambda code is now responsible for returning the proper headers/body, not the gateway.
### _Infrastructure as Code (IAC)_
When creating the AWS services you shouldn’t be building them in the AWS console. Lambda, API Gateway, and DynamoDB should be created using Infrastructure as Code (IaC). Any changes to these resources should be also done via IaC. This could be done with an AWS SAM template and deployed using the SAM CLI, but I opted for the industry standard Terraform. This didn’t take much but tons of reading Terraform documents and guides as I haven’t used this tool before!
### _CI/CD_
Creating a CI/CD pipeline was pretty cool. I haven’t done something like this before, so initially, I utilized AWS CodePipeline and added my GitHub repository. The problem is CodePipeline does have a fee associated with it after 30 days when using a V1 pipeline, and a per-execution charge for V2 pipelines. Both are eligible for AWS Free Tier, but I decided to try my hand at GitHub Actions for CI/CD. This way, I can build a pipeline from scratch for projects outside of AWS like GCP, Azure, etc. The pipeline was created in a way that any push changes to a specific branch would update the files in my S3 bucket and invalidate the CloudFront cached files to reflect the new changes.
## _Conclusion_
Completing the Cloud Resume Challenge has been an invaluable journey, blending theoretical knowledge with hands-on experience across various AWS services and web development tools. From earning my certification to deploying a dynamic, globally accessible resume site, each step reinforced my skills and unveiled new concepts. This experience has not only solidified my understanding of cloud infrastructure but also prepared me for future projects as I pursue the AWS Developer certification. I am excited to continue this journey and tackle new challenges with the confidence and skills I've gained. Thank you for following along!
| tariq_moore |
1,887,692 | Exploring Object-Oriented Programming - TypeScript Examples | Object-oriented programming (OOP) is a paradigm that allows developers to structure their code in a... | 0 | 2024-06-13T21:04:11 | https://dev.to/mahabubr/exploring-object-oriented-programming-typescript-examples-1573 | webdev, typescript, oop, programming | Object-oriented programming (OOP) is a paradigm that allows developers to structure their code in a more organized and modular way, making it easier to manage and maintain. In this article, we'll explore some fundamental concepts of OOP—inheritance, polymorphism, abstraction, and encapsulation—through the lens of TypeScript, a popular statically typed superset of JavaScript. We'll delve into each concept with examples to illustrate their usage and benefits.
## Inheritance
Inheritance is a mechanism in OOP that allows a class (subclass) to inherit properties and behaviors (methods) from another class (superclass). This promotes code reuse and establishes a hierarchy among classes. In TypeScript, inheritance is achieved using the extends keyword.
```
class Animal {
constructor(public name: string) {}
move(distanceInMeters: number = 0) {
console.log(`${this.name} moved ${distanceInMeters}m.`);
}
}
```
```
class Dog extends Animal {
bark() {
console.log("Woof! Woof!");
}
}
```
```
const dog = new Dog("Buddy");
dog.bark(); // Output: Woof! Woof!
dog.move(10); // Output: Buddy moved 10m.
```
In this example, the Dog class inherits the move method from the Animal class and extends it with its own method bark.
## Polymorphism
Polymorphism allows objects of different classes to be treated as objects of a common superclass. It enables flexibility and extensibility in code by allowing methods to be overridden in subclasses. TypeScript supports polymorphism through method overriding.
```
class Shape {
area(): number {
return 0;
}
}
```
```
class Circle extends Shape {
constructor(private radius: number) {
super();
}
area(): number {
return Math.PI * this.radius ** 2;
}
}
```
```
class Rectangle extends Shape {
constructor(private width: number, private height: number) {
super();
}
area(): number {
return this.width * this.height;
}
}
```
```
const shapes: Shape[] = [new Circle(5), new Rectangle(4, 6)];
shapes.forEach(shape => {
console.log("Area:", shape.area());
});
```
In this example, both Circle and Rectangle classes override the area method of the Shape class to calculate their respective areas.
## Abstraction
Abstraction is the process of hiding complex implementation details and exposing only the necessary functionalities to the outside world. Abstract classes and methods in TypeScript facilitate abstraction.
```
abstract class Vehicle {
constructor(public name: string) {}
abstract move(): void;
}
```
```
class Car extends Vehicle {
move() {
console.log(`${this.name} is driving.`);
}
}
```
```
class Plane extends Vehicle {
move() {
console.log(`${this.name} is flying.`);
}
}
```
```
const car = new Car("Toyota");
const plane = new Plane("Boeing");
car.move(); // Output: Toyota is driving.
plane.move(); // Output: Boeing is flying.
```
Here, Vehicle is an abstract class with an abstract method move(). Subclasses Car and Plane provide concrete implementations of the move method.
## Encapsulation
Encapsulation is the bundling of data (attributes) and methods that operate on that data into a single unit (class). It restricts direct access to the data from outside the class and promotes data hiding and abstraction. In TypeScript, encapsulation is achieved through access modifiers like public, private, and protected.
```
class Employee {
private id: number;
public name: string;
constructor(id: number, name: string) {
this.id = id;
this.name = name;
}
displayInfo() {
console.log(`ID: ${this.id}, Name: ${this.name}`);
}
}
```
```
const emp = new Employee(101, "John Doe");
console.log(emp.name); // Output: John Doe
emp.displayInfo(); // Output: ID: 101, Name: John Doe
// console.log(emp.id); // Error: Property 'id' is private and only accessible within class 'Employee'.
```
In this example, id is a private member of the Employee class, accessible only within the class itself.
## Conclusion
Understanding and applying the principles of inheritance, polymorphism, abstraction, and encapsulation are crucial for writing clean, maintainable, and scalable code. TypeScript's support for these OOP concepts enhances code readability and modularity, making it a powerful choice for building complex applications. By leveraging these features effectively, developers can write more robust and extensible software solutions.
| mahabubr |
1,887,686 | RecyclerView vs LazyColumn | I've been working with Jetpack Compose for about 6-8 months but I've never checked a performance... | 0 | 2024-06-13T20:52:04 | https://dev.to/mardsoul/recyclerview-vs-lazycolumn-5g6g | android, ui, testing | I've been working with Jetpack Compose for about 6-8 months but I've never checked a performance difference between both technologies, I only heard from Google that Compose is much better than XML View.
So, I decided to test a performance between RecyclerView and LazyColumn.
### About an app
The app solve a typical test task "List and details" :) The app was made in 2 variants (Compose and XML View) with the same UI. And we got a list of users from [GitHub REST API](https://docs.github.com/en/rest), and click by some user, and get details of user... _as usual..._
I don't use any optimization such as DiffUtil for RecyclerView or derivedStateOf for LazyColumn, I wanna see the difference as is.
Let me don't upload screenshots of app, it's too boring. You may get the app from [GitHub Repository](https://github.com/MarDSoul/ttt-android-list-and-details.git)
For testing I use macrobenchmark library, device - Samsung Galaxy A04s (SM-A047F-14).
### Short results
|test|parameter|XML View|Jetpack Compose|
|-|-|-|-|
|`startup()`|timeToInitialDisplay (median)|769.5ms| 1048.0ms |
|`scrollReposList()`|frameDurationCpu (P99)|23.2ms|22.9ms|
||frameOverrun (P99)|19.8ms|23.6ms|
|`clickOnExpandedButton()`|frameDurationCpu (P99)|67,7ms|61.4ms|
||frameOverrun (P99)|~~766,1ms~~|72.8ms|
|`clickToDetails()`|frameDurationCpu (P99)|57,8ms|33.2ms|
||frameOverrun (P99)|~~2688,3ms~~|94.5ms|
OK, you may see that not all results are relevant. _Something went wrong..._
1st mistake in `clickOnExpandedButton()` I make by myself inside the `RecyclerView.Adapter` class. Sorry guys, I've just forgotten how to make a beautiful expanded action with RecyclerView.
2nd mistake in `clickToDetails()`... I don't know and we will just ignore this.
Let's see:
- `startup()`: cold boot by Compose is much worse than by XML - over than 20%
- `scrollReposList()`: frame durations are the same (difference is lesser than 10%); frame overrun - both values are positive and Compose is 20% worse. It means that Compose creates frame a little bit more faster but shows it on a screen more later. _Strange result. Needs to investigate... maybe later... maybe never :)_
Let's look a little deeper at frame rendering. And for compare I'll get the same moment from `clickToDetails()`. The moment when rendering list with repositories on the Details screen.
#### Rendering frame with Compose
#### Rendering frame with XML View
As we can see Compose shows UI more slower. A repos list - 91.27 ms of Compose against 71.95 ms of XML View. But there is an animation (15.38 ms) inside a Choreographer's synch in Compose.
### Conclusions
- There is a big difference in a cold boot. But it can be fixed with Baseline Profiles.
- We don't have a super, wow, amazing performance, but overall our app is a little bit more faster and smoothly with Compose.
- Too much depends directly on a developer and how he can optimize views or composable functions.
- Instrumented tests of XML View is really painful vs Compose.
_What do I want to say at the and? I want to use Compose so I never have to write instrumented tests for XML._ | mardsoul |
1,887,691 | Harnessing the Power of React's useContext Hook: Simplifying State Management in Complex Applications | Introduction: React's useContext hook is a powerful tool that facilitates the management... | 0 | 2024-06-13T20:59:53 | https://dev.to/mahabubr/harnessing-the-power-of-reacts-usecontext-hook-simplifying-state-management-in-complex-applications-46ne | webdev, javascript, react, usecontext | ## Introduction:
React's useContext hook is a powerful tool that facilitates the management and sharing of state across components in a React application. It offers a simpler alternative to prop drilling and context API, allowing developers to access and update state without having to pass props through every level of the component tree. In this article, we'll delve into how useContext works, its syntax, and provide various examples to illustrate its usage from different perspectives.
## Understanding useContext:
To comprehend how useContext works, let's start with its syntax. The useContext hook takes a context object created by React.createContext() as its argument and returns the current context value for that context.
- Syntax:
```
const value = useContext(MyContext);
```
Here, MyContext is the context object created using React.createContext(). This hook essentially allows you to access the value provided by the nearest context provider in the component tree.
Now, let's explore different perspectives on how to utilize useContext effectively:
## Simplifying State Management:
Consider a scenario where you have a theme that needs to be applied throughout your application. Instead of passing down the theme props to every component, you can utilize useContext to access the theme value directly.
```
// ThemeContext.js
import { createContext } from 'react';
const ThemeContext = createContext('light');
export default ThemeContext;
```
```
// App.js
import React, { useContext } from 'react';
import ThemeContext from './ThemeContext';
const App = () => {
const theme = useContext(ThemeContext);
return (
<div className={`App ${theme}`}>
<Header />
<MainContent />
</div>
);
};
export default App;
```
## Authentication State Management:
Another common use case is managing authentication state. Instead of passing user authentication data down through multiple layers of components, useContext can be utilized to provide access to the authentication state globally.
```
// AuthContext.js
import { createContext } from 'react';
const AuthContext = createContext(null);
export default AuthContext;
```
```
// App.js
import React, { useContext } from 'react';
import AuthContext from './AuthContext';
const App = () => {
const auth = useContext(AuthContext);
return (
<div className="App">
{auth ? <AuthenticatedApp /> : <UnauthenticatedApp />}
</div>
);
};
export default App;
```
## Language Localization:
In a multilingual application, useContext can be employed to access the current language preference without explicitly passing it down to every component.
```
// LanguageContext.js
import { createContext } from 'react';
const LanguageContext = createContext('en');
export default LanguageContext;
```
```
// App.js
import React, { useContext } from 'react';
import LanguageContext from './LanguageContext';
const App = () => {
const language = useContext(LanguageContext);
return (
<div className="App">
<Header />
<MainContent />
<Footer />
</div>
);
};
export default App;
```
## Conclusion:
React's useContext hook provides a cleaner and more efficient way to manage state within React components. By understanding its syntax and various applications, developers can leverage its power to simplify state management, authentication handling, localization, and much more in their React applications. Incorporating useContext can lead to cleaner and more maintainable code, making React development a smoother and more enjoyable experience. | mahabubr |
1,887,689 | Unlocking the Power of useRef: Besic to Advanced Examples for React Developers | React, the popular JavaScript library for building user interfaces, offers a plethora of hooks to... | 0 | 2024-06-13T20:56:38 | https://dev.to/mahabubr/unlocking-the-power-of-useref-besic-to-advanced-examples-for-react-developers-4e0l | webdev, javascript, react, useref | React, the popular JavaScript library for building user interfaces, offers a plethora of hooks to manage state, side effects, and more. Among these, useRef stands out as a versatile tool for accessing and managing references to DOM elements or other values across renders. In this article, we'll delve into how useRef works, its various use cases, and provide insightful examples to grasp its functionality from different perspectives.
## Understanding useRef
useRef is a hook provided by React that returns a mutable ref object. This ref object persists across renders and allows us to keep values mutable without triggering re-renders. Unlike state variables, changes to refs do not cause component re-renders. This makes useRef perfect for storing mutable values or accessing DOM elements imperatively.
## Basic Usage
Let's start with a basic example to illustrate the usage of useRef. Consider a scenario where you want to focus an input field when a component mounts. Here's how you can achieve it using useRef:
```
import React, { useRef, useEffect } from 'react';
function MyComponent() {
const inputRef = useRef(null);
useEffect(() => {
inputRef.current.focus();
}, []);
return <input ref={inputRef} />;
}
```
In this example, useRef is used to create a reference to the input element. We then use useEffect to focus the input element when the component mounts by accessing the current property of the inputRef.
## Managing Previous Values
Another interesting use case of useRef is to maintain values across renders without triggering re-renders. This can be handy when you need to compare previous and current values within a component. Let's see how you can achieve this:
```
import React, { useRef, useEffect } from 'react';
function MyComponent() {
const prevValue = useRef('');
useEffect(() => {
// Compare prev and current values
console.log('Previous value:', prevValue.current);
prevValue.current = 'New Value';
console.log('Current value:', prevValue.current);
});
return <div>Check the console for logs</div>;
}
```
In this example, prevValue is a ref object initialized with an empty string. Inside the useEffect, we log the previous value, update it, and then log the current value. This allows us to maintain the previous value across renders without causing re-renders.
## Imperative DOM Manipulation
useRef is not limited to just storing values; it's also useful for imperative DOM manipulation. Let's consider an example where we want to measure the height of an element dynamically:
```
import React, { useRef, useState, useEffect } from 'react';
function MyComponent() {
const [height, setHeight] = useState(0);
const elementRef = useRef(null);
useEffect(() => {
setHeight(elementRef.current.clientHeight);
}, []);
return (
<div ref={elementRef}>
<p>Height of this div is: {height}px</p>
</div>
);
}
```
Here, elementRef is used to create a reference to the div element. Inside the useEffect, we measure the height of the element using clientHeight and update the state accordingly.
## Managing Timer Intervals
```
import React, { useRef, useEffect } from 'react';
function Timer() {
const intervalRef = useRef(null);
useEffect(() => {
intervalRef.current = setInterval(() => {
console.log('Tick...');
}, 1000);
return () => {
clearInterval(intervalRef.current);
};
}, []);
return <div>Timer is running. Check the console for ticks.</div>;
}
```
In this example, useRef is used to maintain a reference to the interval created by setInterval(). The interval is cleared when the component unmounts, preventing memory leaks.
## Accessing Child Components
```
import React, { useRef } from 'react';
import ChildComponent from './ChildComponent';
function ParentComponent() {
const childRef = useRef();
const handleClick = () => {
childRef.current.doSomething();
};
return (
<div>
<ChildComponent ref={childRef} />
<button onClick={handleClick}>Invoke Child Method</button>
</div>
);
}
```
Here, useRef is employed to access methods or properties of a child component imperatively. This can be useful for invoking child component functions from the parent.
## Tracking Scroll Position
```
import React, { useRef, useEffect, useState } from 'react';
function ScrollTracker() {
const [scrollPos, setScrollPos] = useState(0);
const scrollRef = useRef();
useEffect(() => {
const handleScroll = () => {
setScrollPos(scrollRef.current.scrollTop);
};
scrollRef.current.addEventListener('scroll', handleScroll);
return () => {
scrollRef.current.removeEventListener('scroll', handleScroll);
};
}, []);
return (
<div ref={scrollRef} style={{ height: '200px', overflow: 'auto' }}>
<p>Scroll position: {scrollPos}px</p>
{/* Scrollable content */}
</div>
);
}
```
This example demonstrates how useRef can be used to track and update the scroll position of an element, such as a scrollable container.
## Creating Mutable Variables
```
import React, { useRef } from 'react';
function MutableVariable() {
const countRef = useRef(0);
const handleClick = () => {
countRef.current++;
console.log('Count:', countRef.current);
};
return (
<div>
<p>Count: {countRef.current}</p>
<button onClick={handleClick}>Increment Count</button>
</div>
);
}
```
Here, useRef is employed to create a mutable variable (countRef) whose value persists across renders without triggering re-renders.
## Handling Uncontrolled Components
```
import React, { useRef } from 'react';
function UncontrolledInput() {
const inputRef = useRef();
const handleClick = () => {
alert(`Input value: ${inputRef.current.value}`);
};
return (
<div>
<input type="text" ref={inputRef} />
<button onClick={handleClick}>Get Input Value</button>
</div>
);
}
```
In this example, useRef is used to access the value of an input field without using controlled component techniques. This can be handy for managing form inputs in certain scenarios
## Conclusion
useRef is a powerful hook in React that provides a way to work with mutable values and perform imperative actions on DOM elements. Its versatility makes it indispensable in various scenarios, ranging from managing focus, storing previous values, to imperative DOM manipulation. By mastering useRef, you unlock a plethora of possibilities to enhance the functionality and performance of your React applications. | mahabubr |
1,887,688 | Elite Gta Tow | Experience hassle-free towing services at unbeatable prices across Downtown Toronto, Scarborough,... | 0 | 2024-06-13T20:56:28 | https://dev.to/elite_towing_94465a734457/elite-gta-tow-30nb |
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1,887,687 | Understanding How React's useEffect Works: A Comprehensive Guide | React, as a JavaScript library for building user interfaces, provides developers with an array of... | 0 | 2024-06-13T20:53:29 | https://dev.to/mahabubr/understanding-how-reacts-useeffect-works-a-comprehensive-guide-3947 | react, webdev, javascript, useeffect | React, as a JavaScript library for building user interfaces, provides developers with an array of tools to manage state, handle side effects, and optimize performance. Among these tools, useEffect stands out as a powerful hook for managing side effects in functional components. In this article, we'll delve into the workings of useEffect, exploring its functionality, usage patterns, and providing diverse examples to illustrate its versatility.
## What is useEffect?
useEffect is a React hook that enables developers to perform side effects in functional components. Side effects may include data fetching, subscriptions, or manually changing the DOM in ways that React components don’t traditionally do. Unlike lifecycle methods in class components, useEffect allows developers to encapsulate side effects in a way that's concise and declarative, aligning with React's functional paradigm.
## Basic Usage
The basic syntax of useEffect is simple:
```
import React, { useEffect } from 'react';
function MyComponent() {
useEffect(() => {
// Side effect code here
return () => {
// Cleanup code here
};
}, [/* dependencies */]);
return <div>My Component</div>;
}
```
- The first argument is a function containing the side effect code.
- The second argument is an optional array of dependencies. If provided, the effect will only re-run if any of the dependencies have changed since the last render.
## Fetching Data
One common use case for useEffect is fetching data from an API. Let's consider an example where we fetch a list of posts from a RESTful API using fetch:
```
import React, { useState, useEffect } from 'react';
function PostList() {
const [posts, setPosts] = useState([]);
useEffect(() => {
fetch('https://jsonplaceholder.typicode.com/posts')
.then(response => response.json())
.then(data => setPosts(data));
}, []);
return (
<ul>
{posts.map(post => (
<li key={post.id}>{post.title}</li>
))}
</ul>
);
}
```
## Subscribing to a WebSocket
Another example demonstrates subscribing to a WebSocket using useEffect. We'll create a simple chat application that listens for messages from a WebSocket server:
```
import React, { useState, useEffect } from 'react';
function ChatApp() {
const [messages, setMessages] = useState([]);
useEffect(() => {
const socket = new WebSocket('ws://localhost:3000/chat');
socket.onmessage = event => {
setMessages(prevMessages => [...prevMessages, event.data]);
};
return () => {
socket.close();
};
}, []);
return (
<div>
<h1>Chat Messages</h1>
<ul>
{messages.map((message, index) => (
<li key={index}>{message}</li>
))}
</ul>
</div>
);
}
```
## Cleaning Up Side Effects
useEffect also allows for cleanup of side effects. Consider a scenario where you set up a subscription and need to unsubscribe when the component unmounts:
```
import React, { useState, useEffect } from 'react';
function Timer() {
const [time, setTime] = useState(0);
useEffect(() => {
const intervalId = setInterval(() => {
setTime(prevTime => prevTime + 1);
}, 1000);
return () => {
clearInterval(intervalId);
};
}, []);
return <div>Time: {time} seconds</div>;
}
```
## Updating Document Title
One interesting use case of useEffect is updating the document title dynamically based on component state. This can be useful for providing context-sensitive titles in single-page applications:
```
import React, { useState, useEffect } from 'react';
function DynamicTitle() {
const [count, setCount] = useState(0);
useEffect(() => {
document.title = `Clicked ${count} times`;
}, [count]);
return (
<div>
<p>You clicked {count} times</p>
<button onClick={() => setCount(count + 1)}>Click me</button>
</div>
);
}
```
## Geolocation Tracking
With useEffect, you can access browser APIs like geolocation. Here's an example that tracks the user's current position
```
import React, { useState, useEffect } from 'react';
function LocationTracker() {
const [position, setPosition] = useState(null);
useEffect(() => {
const successHandler = (position) => {
setPosition(position.coords);
};
const errorHandler = (error) => {
console.error(error);
};
navigator.geolocation.getCurrentPosition(successHandler, errorHandler);
}, []);
return (
<div>
<h2>Your Current Location:</h2>
{position ? (
<p>
Latitude: {position.latitude}, Longitude: {position.longitude}
</p>
) : (
<p>Loading...</p>
)}
</div>
);
}
```
## Managing Local Storage
useEffect can be handy for interacting with browser storage. Here's how you can synchronize a state variable with local storage:
```
import React, { useState, useEffect } from 'react';
function LocalStorageExample() {
const [name, setName] = useState('');
useEffect(() => {
const storedName = localStorage.getItem('name');
if (storedName) {
setName(storedName);
}
}, []);
useEffect(() => {
localStorage.setItem('name', name);
}, [name]);
return (
<div>
<input
type="text"
value={name}
onChange={(e) => setName(e.target.value)}
placeholder="Enter your name"
/>
<p>Hello, {name}!</p>
</div>
);
}
```
## Debouncing Input
Debouncing input is a common requirement in web development to reduce unnecessary function calls. Here's how you can implement it using useEffect:
```
import React, { useState, useEffect } from 'react';
function DebouncedInput() {
const [input, setInput] = useState('');
const [debouncedInput, setDebouncedInput] = useState('');
useEffect(() => {
const timerId = setTimeout(() => {
setDebouncedInput(input);
}, 1000);
return () => {
clearTimeout(timerId);
};
}, [input]);
return (
<div>
<input
type="text"
value={input}
onChange={(e) => setInput(e.target.value)}
placeholder="Enter text"
/>
<p>Debounced Input: {debouncedInput}</p>
</div>
);
}
```
## Conclusion
These examples showcase the versatility of useEffect in managing various side effects in React applications. Whether it's interacting with APIs, handling browser events, or synchronizing state with browser features like local storage, useEffect provides a clean and efficient way to manage side effects in functional components. By understanding its flexibility and usage patterns, developers can leverage useEffect to build robust and dynamic user interfaces in their React applications. | mahabubr |
1,887,597 | Hello world | A post by Phawat | 0 | 2024-06-13T19:06:56 | https://dev.to/phawat63915/hello-world-4m20 | webdev | phawat63915 | |
1,887,685 | shadcn-ui/ui codebase analysis: Cards example explained. | In this article, we will learn about Cards example in shadcn-ui/ui. This article consists of the... | 0 | 2024-06-13T20:51:25 | https://dev.to/ramunarasinga/shadcn-uiui-codebase-analysis-cards-example-explained-2pkd | javascript, opensource, nextjs, shadcnui | In this article, we will learn about [Cards](https://github.com/shadcn-ui/ui/tree/main/apps/www/app/(app)/examples/cards) example in shadcn-ui/ui. This article consists of the following sections:
1. Where is cards folder located?
2. What is in cards folder?
3. Components used in cards example.
Where is card folder located?
-----------------------------
Shadcn-ui/ui uses app router and [cards folder](https://github.com/shadcn-ui/ui/tree/main/apps/www/app/(app)/examples/cards) is located in [examples](https://github.com/shadcn-ui/ui/tree/main/apps/www/app/(app)/examples) folder, which is located in [(app)](https://github.com/shadcn-ui/ui/tree/main/apps/www/app/(app)), [a route group in Next.js](https://medium.com/@ramu.narasinga_61050/app-app-route-group-in-shadcn-ui-ui-098a5a594e0c).
What is in cards folder?
------------------------
As you can see from the above image, we have components folder, page.tsx.
[page.tsx](https://github.com/shadcn-ui/ui/blob/main/apps/www/app/(app)/examples/cards/page.tsx) is loaded in place of [{children} in examples/layout.tsx](https://github.com/shadcn-ui/ui/blob/main/apps/www/app/(app)/examples/layout.tsx#L55).
Below is the code picked from cards/page.tsx
```js
import { Metadata } from "next"
import Image from "next/image"
import { cn } from "@/lib/utils"
import { DemoCookieSettings } from "./components/cookie-settings"
import { DemoCreateAccount } from "./components/create-account"
import { DemoDatePicker } from "./components/date-picker"
import { DemoGithub } from "./components/github-card"
import { DemoNotifications } from "./components/notifications"
import { DemoPaymentMethod } from "./components/payment-method"
import { DemoReportAnIssue } from "./components/report-an-issue"
import { DemoShareDocument } from "./components/share-document"
import { DemoTeamMembers } from "./components/team-members"
export const metadata: Metadata = {
title: "Cards",
description: "Examples of cards built using the components.",
}
function DemoContainer({
className,
...props
}: React.HTMLAttributes<HTMLDivElement>) {
return (
<div
className={cn(
"flex items-center justify-center \[&>div\]:w-full",
className
)}
{...props}
/>
)
}
export default function CardsPage() {
return (
<>
<div className="md:hidden">
<Image
src="/examples/cards-light.png"
width={1280}
height={1214}
alt="Cards"
className="block dark:hidden"
/>
<Image
src="/examples/cards-dark.png"
width={1280}
height={1214}
alt="Cards"
className="hidden dark:block"
/>
</div>
<div className="hidden items-start justify-center gap-6 rounded-lg p-8 md:grid lg:grid-cols-2 xl:grid-cols-3">
<div className="col-span-2 grid items-start gap-6 lg:col-span-1">
<DemoContainer>
<DemoCreateAccount />
</DemoContainer>
<DemoContainer>
<DemoPaymentMethod />
</DemoContainer>
</div>
<div className="col-span-2 grid items-start gap-6 lg:col-span-1">
<DemoContainer>
<DemoTeamMembers />
</DemoContainer>
<DemoContainer>
<DemoShareDocument />
</DemoContainer>
<DemoContainer>
<DemoDatePicker />
</DemoContainer>
<DemoContainer>
<DemoNotifications />
</DemoContainer>
</div>
<div className="col-span-2 grid items-start gap-6 lg:col-span-2 lg:grid-cols-2 xl:col-span-1 xl:grid-cols-1">
<DemoContainer>
<DemoReportAnIssue />
</DemoContainer>
<DemoContainer>
<DemoGithub />
</DemoContainer>
<DemoContainer>
<DemoCookieSettings />
</DemoContainer>
</div>
</div>
</>
)
}
```
Components used in cards example.
---------------------------------
To find out the components used in this cards example, we can simply look at the imports used at the top of page.
```js
import { DemoCookieSettings } from "./components/cookie-settings"
import { DemoCreateAccount } from "./components/create-account"
import { DemoDatePicker } from "./components/date-picker"
import { DemoGithub } from "./components/github-card"
import { DemoNotifications } from "./components/notifications"
import { DemoPaymentMethod } from "./components/payment-method"
import { DemoReportAnIssue } from "./components/report-an-issue"
import { DemoShareDocument } from "./components/share-document"
import { DemoTeamMembers } from "./components/team-members"
```
Do not forget the [modular components](https://github.com/shadcn-ui/ui/tree/main/apps/www/app/(app)/examples/cards/components) inside cards folder.
> _Want to learn how to build shadcn-ui/ui from scratch? Check out_ [_build-from-scratch_](https://github.com/Ramu-Narasinga/build-from-scratch) _and give it a star if you like it._ [_Solve challenges_](https://tthroo.com/) _to build shadcn-ui/ui from scratch. If you are stuck or need help?_ [_solution is available_](https://tthroo.com/build-from-scratch)_._
About me:
---------
Website: [https://ramunarasinga.com/](https://ramunarasinga.com/)
Linkedin: [https://www.linkedin.com/in/ramu-narasinga-189361128/](https://www.linkedin.com/in/ramu-narasinga-189361128/)
Github: [https://github.com/Ramu-Narasinga](https://github.com/Ramu-Narasinga)
Email: [ramu.narasinga@gmail.com](mailto:ramu.narasinga@gmail.com)
References:
-----------
1. [https://github.com/shadcn-ui/ui/tree/main/apps/www/app/(app)/examples/cards](https://github.com/shadcn-ui/ui/tree/main/apps/www/app/(app)/examples/cards)
2. [https://github.com/shadcn-ui/ui/blob/main/apps/www/app/(app)/examples/cards/page.tsx](https://github.com/shadcn-ui/ui/blob/main/apps/www/app/(app)/examples/cards/page.tsx)
3. [https://github.com/shadcn-ui/ui/tree/main/apps/www/app/(app)/examples/cards/components](https://github.com/shadcn-ui/ui/tree/main/apps/www/app/(app)/examples/cards/components) | ramunarasinga |
1,887,683 | Demystifying React's useState Hook: A Comprehensive Guide | Introduction: React's useState hook is a fundamental building block of modern React... | 0 | 2024-06-13T20:43:12 | https://dev.to/mahabubr/demystifying-reacts-usestate-hook-a-comprehensive-guide-a0 | react, hooks, development, frontend | ## Introduction:
React's useState hook is a fundamental building block of modern React applications, enabling developers to manage state within functional components. Understanding how useState works is crucial for every React developer, as it forms the basis for managing component-level state effectively. In this article, we'll delve into the inner workings of useState, exploring its syntax, usage, and underlying mechanisms.
## Understanding State in React:
- Before hooks, managing state in React components was primarily done using class components and the setState method.
- With the advent of hooks in React 16.8, developers gained the ability to use stateful logic in functional components.
## Introduction to useState:
- useState is a hook that allows functional components to manage state.
- It provides a way to declare state variables within functional components and re-render the component when the state change
s.
## Syntax of useState:
- The useState hook is imported from the 'react' package: import React, { useState } from 'react';
- It returns an array with two elements: the current state value and a function to update that value.
## Basic Usage of useState:
- To use useState, call it within a functional component, passing the initial state value as an argument.
## Example :
```
import React, { useState } from 'react';
function Counter() {
const [count, setCount] = useState(0);
return (
<div>
<p>Count: {count}</p>
<button onClick={() => setCount(count + 1)}>Increment</button>
</div>
);
}
```
## How useState Works Internally:
- useState uses closures and the call stack to manage state.
- When a component renders, useState initializes the state variable with the provided initial value.
- It returns an array containing the current state value and a function to update that value.
- React keeps track of state changes and schedules re-renders accordingly.
## Handling Multiple State Variables:
- useState can be used multiple times within a single component to manage multiple state variables.
- Each useState call creates a separate state variable.
## Example :
```
const [name, setName] = useState('');
const [age, setAge] = useState(0);
```
## Functional Updates with useState:
- useState also allows functional updates, where the new state is computed based on the previous state.
- This is particularly useful when the new state depends on the previous state.
## Example :
```
const [count, setCount] = useState(0);
// Functional update
const increment = () => setCount(prevCount => prevCount + 1);
```
## Updating State Based on Previous State
- One of the powerful features of useState is its ability to update state based on the previous state. This is crucial for ensuring correctness in cases where state updates are asynchronous or dependent on the current state.
- Implementing a counter with increment and decrement buttons, where the count cannot go below zero.
## Example :
```
import React, { useState } from 'react';
function Counter() {
const [count, setCount] = useState(0);
const increment = () => {
setCount(prevCount => prevCount + 1);
};
const decrement = () => {
setCount(prevCount => (prevCount > 0 ? prevCount - 1 : 0));
};
return (
<div>
<p>Count: {count}</p>
<button onClick={increment}>Increment</button>
<button onClick={decrement}>Decrement</button>
</div>
);
}
```
## Managing Complex State with Objects or Arrays:
- useState is not limited to managing simple state variables like strings or numbers. It can also handle more complex state, such as objects or arrays.
- Creating a form component to manage user input with multiple fields.
## Example :
```
import React, { useState } from 'react';
function Form() {
const [formData, setFormData] = useState({
firstName: '',
lastName: '',
email: '',
});
const handleChange = (e) => {
const { name, value } = e.target;
setFormData(prevData => ({
...prevData,
[name]: value,
}));
};
const handleSubmit = (e) => {
e.preventDefault();
// Submit form data
};
return (
<form onSubmit={handleSubmit}>
<input
type="text"
name="firstName"
value={formData.firstName}
onChange={handleChange}
placeholder="First Name"
/>
<input
type="text"
name="lastName"
value={formData.lastName}
onChange={handleChange}
placeholder="Last Name"
/>
<input
type="email"
name="email"
value={formData.email}
onChange={handleChange}
placeholder="Email"
/>
<button type="submit">Submit</button>
</form>
);
}
```
## Conclusion:
1. React's useState hook revolutionized state management in functional components, providing a simple and intuitive way to manage component-level state.
2. Understanding how useState works internally is essential for writing efficient and maintainable React code.
3. By leveraging useState effectively, developers can build powerful and dynamic React applications with ease.
In conclusion, the useState hook is a powerful tool that simplifies state management in React functional components. By mastering its usage and understanding its internal mechanisms, developers can write cleaner, more maintainable code and build robust React applications. | mahabubr |
1,887,682 | My WhatsApp Experience | WhatsApp is far and away the most popular messaging/communication platform in the world, but also in... | 0 | 2024-06-13T20:42:40 | https://dev.to/chinedu2002/my-whatsapp-experience-5gm6 | whatsapp, review, blog, writing | WhatsApp is far and away the most popular messaging/communication platform in the world, but also in general one of the most popular apps. This is due to it having an astonishing 5B+ downloads and a rating of 4.3/5 on the Google Play store.
The main thing when I first used WhatsApp is it’s very easy and simple to use meaning it can be used by anyone. In addition, it’s effortless to add or sync contacts into the app making the experience stress-free.
WhatsApp is truly worth all the popularity and hype due to the fact how secure and private it is. This is because your personal information will not get leaked , your chats will stay between you and the reciever and all data is automatically backed up. Moreover, as long as you have a person’s phone number you can text and call them for free regardless of where they live around the world.
There are only a few downsides to WhatsApp which are you can’t contact the person you want without their phone number, while their are other apps like Facebook and Instagram which you can use to get in contact with the designated person without the need for their phone number. Also, the video call option is not great as it’s not the best of quality and the layout of it feels slightly outdated.
Overall, WhatsApp is the best communication/messaging app in the world because it provides the most simple and secure experience out of any other and also has the popularity to back it up. So I recommend it more than any other. | chinedu2002 |
1,887,681 | How can I have two mice and keyboards, one pair controlled by a program? | I want to create a program that automatically does some tasks on the computer. I want these tasks to... | 0 | 2024-06-13T20:42:34 | https://dev.to/breath3manually/how-can-i-have-two-mice-and-keyboards-one-pair-controlled-by-a-program-50d1 |
I want to create a program that automatically does some tasks on the computer. I want these tasks to be done at the same time as the user is doing their own tasks. In order to do this, I would need to simulate a mouse and keyboard.
I want the two pairs of mice and keyboards to work separately, for example if program selected a textbox at the same time that a user selected a textbox and both the user and the program type something, I want what the user typed to go into the textbox that the user selected and what the program typed to go into the textbox that the program selected.
How can I do this? Thank you very much :)
I've tried libraries like pyautogui and others but they control the user's mouse and keyboard. I want the program to control its own mouse and keyboard.
| breath3manually | |
1,887,679 | EF Core 8 Update Entity | When entities are being tracked (this is the default, to track changes) EF Core is efficient with... | 21,515 | 2024-06-13T20:39:56 | https://dev.to/karenpayneoregon/ef-core-8-update-entity-37il | csharp, database, dotnetcore | When entities are being tracked (this is the default, to track changes) EF Core is efficient with updates in that if there are several properties for a model and only one or two properties changed the update statement only updates those columns/properties which changed rather than every column/property.
**Model**
```csharp
public partial class Person
{
public int Id { get; set; }
public string Title { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public DateOnly BirthDate { get; set; }
}
```
## Example 1
Read data.
```csharp
await using var context = new Context();
Person person = context.Person.FirstOrDefault();
```
Change FirstName and LastName.
```csharp
person.FirstName = "Jane";
person.LastName = "Adams";
```
Here the LastName is marked as not modified.
```csharp
context.Entry(person).Property(p => p.LastName).IsModified = false;
```
Save changes.
```csharp
var saveChanges = await context.SaveChangesAsync();
```
Using a log file to see what EF Core generated for the above, note only FirstName was updated.
```
info: 6/13/2024 06:36:37.171 RelationalEventId.CommandExecuted[20101] (Microsoft.EntityFrameworkCore.Database.Command)
Executed DbCommand (27ms) [Parameters=[@p1='1', @p0='Jane' (Nullable = false) (Size = 4000)], CommandType='Text', CommandTimeout='30']
SET IMPLICIT_TRANSACTIONS OFF;
SET NOCOUNT ON;
UPDATE [Person] SET [FirstName] = @p0
OUTPUT 1
WHERE [Id] = @p1;
```
Now, let's update the LastName.
```csharp
person.LastName = "Cater";
saveChanges = await context.SaveChangesAsync();
```
Log file entry, only LastName property was updated.
```
info: 6/13/2024 06:36:37.188 RelationalEventId.CommandExecuted[20101] (Microsoft.EntityFrameworkCore.Database.Command)
Executed DbCommand (1ms) [Parameters=[@p1='1', @p0='Cater' (Nullable = false) (Size = 4000)], CommandType='Text', CommandTimeout='30']
SET IMPLICIT_TRANSACTIONS OFF;
SET NOCOUNT ON;
UPDATE [Person] SET [LastName] = @p0
OUTPUT 1
WHERE [Id] = @p1;
```
## Example 2
Continued from the first example. Here a super simple model is introduced, think of it as a DTO (Data Transfer Object).
```csharp
public class PersonModel
{
public int Id { get; set; }
public string FirstName { get; set; }
}
```
Here we create a detached Person.
```csharp
int identifier = 2;
person = new() { Id = identifier };
PersonModel model = new() { Id = identifier, FirstName = "Greg" };
context.Attach(person);
context.Entry(person).CurrentValues.SetValues(model);
saveChanges = await context.SaveChangesAsync();
```
1. Create a new Person.
1. Set the Id property to 2.
1. Create an instance of PersonModel with properties set.
1. Attach the new Person which will now be tracked by the change tracker.
1. Set the new Person instance values to the properties of the PersonModel.
1. Save changes.
Log file
```
info: 6/13/2024 06:36:37.197 RelationalEventId.CommandExecuted[20101] (Microsoft.EntityFrameworkCore.Database.Command)
Executed DbCommand (1ms) [Parameters=[@p1='2', @p0='Greg' (Nullable = false) (Size = 4000)], CommandType='Text', CommandTimeout='30']
SET IMPLICIT_TRANSACTIONS OFF;
SET NOCOUNT ON;
UPDATE [Person] SET [FirstName] = @p0
OUTPUT 1
WHERE [Id] = @p1;
```
## What's the point?
To show that EF Core is efficient with updates which is important more so for web applications than desktop applications, less traffic, quicker response to and from a database.
## Source code
{% cta https://github.com/karenpayneoregon/ef-code-8-samples/tree/master/SetPropertyValuesSample %} Sample project {% endcta %}
Although the above samples are simple, in the source code try experimenting.
### Source code notes
- Each time the project runs the database is recreated.
- Data is generated in the class MockedData.
- Data from above is assigned under Data\Context class in OnModelCreating method.
| karenpayneoregon |
1,887,284 | Programação Orientada a Objetos: Abstração | Abstração | 27,708 | 2024-06-13T20:36:03 | https://dev.to/fabianoflorentino/programacao-orientada-a-objetos-abstracao-157o | programming, braziliandevs, poo | ---
title: "Programação Orientada a Objetos: Abstração"
published: true
description: Abstração
series: Programação Orientada a Objetos
tags: programming, braziliandevs, poo
cover_image: https://i.ibb.co/m69Qnf6/Screenshot-2024-06-26-at-21-39-20.png
---
# Abstração
Em ciência da computação, abstração é a habilidade de se concentrar nos aspectos essenciais de um contexto, ignorando características menos importantes ou acidentais. Em programação orientada a objetos, uma classe é uma abstração de entidades existentes no contexto de uma aplicação. Como exemplo, uma classe Usuario pode representar um usuário de um sistema que pode se dividir em subclasses como UsuarioAdministrador, UsuarioComum, UsuarioVisitante, etc.
## Principais Conceitos
Uma classe abstrada é criada para representar entidades e conceitos abstratos. A classe abstrata é sempre uma "Super classe" que não possui instâncias, que implementa métodos que são de uso comum a todas as subclasses. As subclasses são classes que herdam os métodos e atributos da classe abstrata, podendo implementar métodos específicos.
## Como funciona em Go
Em Go, não existe o conceito de classes, mas podemos alcançar a abstração por meio de interfaces. Uma interface é um tipo abstrato que define um conjunto de métodos que um tipo deve possuir. Em Go, a implementação das interfaces é implícita, o que significa que qualquer tipo que tenha os métodos exigidos por uma interface automaticamente a implementa, sem a necessidade de uma declaração explícita. Isso permite que um tipo concreto seja tratado como uma interface, sem a necessidade de conhecer a implementação específica do tipo.
```go
package usuario
type Usuario interface {
Nome() string
Email() string
}
```
```go
package usuario
// Struct que representa um usuário administrador
type UsuarioAdministrador struct {
nome string
email string
}
// Método que retorna o nome do usuário administrador
func (ua UsuarioAdministrador) Nome() string {
return ua.nome
}
// Método que retorna o email do usuário administrador
func (ua UsuarioAdministrador) Email() string {
return ua.email
}
// Função que registra um usuário administrador
func RegistraUsuarioAdministrador(nome, email string) Usuario {
return UsuarioAdministrador{nome, email}
}
```
```go
package usuario
// Struct que representa um usuário comum
type UsuarioComum struct {
nome string
email string
}
// Método que retorna o nome do usuário comum
func (uc UsuarioComum) Nome() string {
return uc.nome
}
// Método que retorna o email do usuário comum
func (uc UsuarioComum) Email() string {
return uc.email
}
// Função que registra um usuário comum
func RegistraUsuarioComum(nome, email string) Usuario {
return UsuarioComum{nome, email}
}
```
```go
package usuario
import "fmt"
// PrintUsuarioComum imprime os dados de um usuario
func PrintUsuario(u Usuario) {
fmt.Printf("Nome: %s, Email: %s\n", u.Nome(), u.Email())
}
```
```go
package main
import "abstracao/usuario"
func main() {
// Registra um usuário comum
usuario_comum := usuario.RegistraUsuarioComum("Usuario Commum", "usuario_comum@email.com")
// Registra um usuário administrador
usuario_administrador := usuario.RegistraUsuarioAdministrador("Usuario Administrador", "usuario_administrador@email.com")
// Imprime os dados dos usuários
usuario.PrintUsuario(usuario_comum)
usuario.PrintUsuario(usuario_administrador)
}
```
```shell
abstracao ➜ go run main.go
Nome: Usuario Commum, Email: usuario_comum@email.com
Nome: Usuario Administrador, Email: usuario_administrador@email.com
```
Neste exemplo, temos uma interface `Usuario` que define os métodos `Nome` e `Email`. As structs `UsuarioAdministrador` e `UsuarioComum` implementam a `interface Usuario`, fornecendo suas próprias versões dos métodos `Nome` e `Email`. As funções `RegistraUsuarioAdministrador` e `RegistraUsuarioComum` são responsáveis por criar instâncias de `UsuarioAdministrador` e `UsuarioComum`, respectivamente. No arquivo `main.go`, instanciamos objetos de `UsuarioAdministrador` e `UsuarioComum`, e chamamos os métodos Nome e Email de cada um para demonstrar a implementação da interface.
# Conclusão
A abstração é fundamental no design de software, permitindo a definição de contratos de comportamento independentes das implementações específicas. Em Go, embora não existam classes como nas linguagens orientadas a objetos tradicionais, a abstração é alcançada eficientemente através de interfaces. Interfaces permitem a criação de tipos que aderem a um conjunto de métodos, promovendo flexibilidade e reutilização de código. Ao separar a definição de comportamento da implementação concreta, interfaces simplificam a manutenção de sistemas complexos e permitem que novos tipos possam ser integrados com facilidade, melhorando a modularidade e a extensibilidade do código.
# Projeto
[Github](https://github.com/fabianoflorentino/poo/tree/main/abstracao)
# Referências
- [Wikipedia](https://pt.wikipedia.org/wiki/Abstração_(ciência_da_computação))
- [Stack Overflow](https://pt.stackoverflow.com/questions/23103/o-que-é-abstração)
- [Effective Go](https://go.dev/doc/effective_go#interfaces)
- [Go by Example](https://gobyexample.com/interfaces)
- [Aprenda Golang](https://aprendagolang.com.br/trabalhando-com-interfaces/)
```
| fabianoflorentino |
1,884,827 | Netex Server - Netex Sensör - Ağ Keşif Eklentisi | Netex Server Kurulumu Netex server kurulacak makinenin terminalini açınız. Elimizdeki... | 0 | 2024-06-13T20:31:35 | https://dev.to/aciklab/netex-server-netex-sensor-ag-kesif-eklentisi-5c6a | netex, network, liman, server | # Netex Server Kurulumu
- Netex server kurulacak makinenin terminalini açınız.
- Elimizdeki **netex-x64.deb** paketini aşağıdaki komut ile kurunuz:
```
sudo apt install ./netex-x64.deb
```
**NOT:** Paketinizin adı sürümden kaynaklı farklı olacağı için isimlendirmesi farklılık gösterebilir. (Örnek: netex-1234-x64.deb)
- Kurulum sonrası **opt/netex/.env** içine girilir ve düzenlemeler yapılır.
```
APP_KEY="50425718846865597518383313432337"
APP_PORT=7782
DB_DRIVER="postgres"
DB_HOST="127.0.0.1"
DB_NAME="netex"
DB_PASS="1"
DB_PORT=5432
DB_USER="postgres"
ZABBIX_USERNAME="Admin"
ZABBIX_PASSWORD="zabbix"
ZABBIX_URL="http://_zabbix_ip_adresi_/zabbix/api_jsonrpc.php"
ZABBIX_SYNC="ON"
ZABBIX_SNMP_TEMPLATE="Generic by SNMP"
ZABBIX_ICMP_TEMPLATE="ICMP Ping"
LDAP_HOST="_ldap_ip_adresi_"
LDAP_PASSWORD="_ldap_şifreniz_"
LDAP_PORT=636
LDAP_USERNAME="_ldap_username_"
```
Bu konfigürasyonda database bilgileri de eklenmiştir, PostgreSQL kurulmuş olmalıdır ve yapılandırma dosyasına eklediğimiz bilgileri oluşturmalıyız:
## Database Konfigürasyonları
Kurulu değil ise PostgreSQL kurulumu gerçekleştirelim:
```
sudo apt install postgresql
```
**Kullanıcı Oluşturulması:**
```
sudo -u postgres createuser <username>
```
_DB_USER_ bilgisine ne girdiyseniz username bilginiz o şekilde olmalıdır! Bizim senaryomuzda <username> _postgres_'dir.
**Database Oluşturulması:**
```
sudo -u postgres createdb <dbname>
```
_DB_NAME_ bilgisine ne girdiyseniz dbname bilginiz o şekilde olmalıdır! Bizim senaryomuzda <dbname> _netex_'dir.
**Kullanıcıya Şifre Verilmesi:**
```
sudo -u postgres psql
psql=# alter user <username> with encrypted password '<password>';
```
_DB_PASS_ bilgisine ne girdiyseniz password bilginiz o şekilde olmalıdır! Bizim senaryomuzda <password> _1_'dir.
**Database'de Ayrıcalıklar Verme:**
```
psql=# grant all privileges on database <dbname> to <username> ;
```
Bizim senaryomuz için <dbname> bilgisi _netex_, <username> bilgisi ise _postgres_'dir.
Bu işlemlerden sonra kurduğumuz **netex-server**'ı tekrar başlatıp, aktif olup olmadığını kontrol edebiliriz:
```
systemctl restart netex@admin
```
```
systemctl restart netex@client
```
```
root@ubuntu:/home/ubuntu# systemctl status netex@client
● netex@client.service - Netex Server (client)
Loaded: loaded (/etc/systemd/system/netex@.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2024-06-12 06:12:35 UTC; 3h 44min ago
Main PID: 171253 (netex-server)
Tasks: 6 (limit: 2219)
Memory: 8.5M
CPU: 9.875s
CGroup: /system.slice/system-netex.slice/netex@client.service
└─171253 /opt/netex/netex-server -type=client
```
```
root@ubuntu:/home/ubuntu# systemctl status netex@admin
● netex@admin.service - Netex Server (admin)
Loaded: loaded (/etc/systemd/system/netex@.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2024-06-12 06:12:32 UTC; 3h 43min ago
Main PID: 171235 (netex-server)
Tasks: 8 (limit: 2219)
Memory: 15.6M
CPU: 15.185s
CGroup: /system.slice/system-netex.slice/netex@admin.service
└─171235 /opt/netex/netex-server -type=admin
```
# Netex Sensör Kurulumu
- Netex sensör kurulacak makinenin terminalini açınız.
- Elimizdeki **netex-sensor-x64.deb** paketini aşağıdaki komut ile kuruunuz:
```
sudo apt install ./netex-sensor-x64.deb
```
**NOT:** Paketinizin adı sürümden kaynaklı farklı olacağı için isimlendirmesi farklılık gösterebilir. (Örnek: netex-sensor-1234-x64.deb)
- Kurulum sonrası **opt/netex-sensor/.env** içine girilir ve düzenlemeler yapılır.
```
SERVER_URL="https://netex_sensor_ip:7782"
SENSOR_IP="Liman_server_ip"
DNS_SERVER_URL="DNS_SERVER:53"
DEBUG_MODE="OFF"
PORT_MIRRORING_INTERFACE="ens18"
```
- **SERVER_URL** Netex server'ın kurulu olduğu adrestir.
- **SENSOR_IP** Liman MYS'nin kurulu olduğu adrestir
- **DNS_SERVER_URL**'da DNS server adresidir.
Bu işlemlerden sonra kurduğumuz **netex-sensor**'ü tekrar başlatıp, aktif olup olmadığını kontrol edebiliriz:
```
systemctl restart netex-sensor
```
```
root@ubuntu:/home/ubuntu# systemctl status netex-sensor
● netex-sensor.service - Netex Sensor
Loaded: loaded (/etc/systemd/system/netex-sensor.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2024-06-12 10:06:19 UTC; 5s ago
Main PID: 204003 (sensor)
Tasks: 6 (limit: 2219)
Memory: 10.4M
CPU: 280ms
CGroup: /system.slice/netex-sensor.service
└─204003 /opt/netex-sensor/sensor
Jun 12 10:06:19 ubuntu systemd[1]: Started Netex Sensor.
```
# Liman MYS - Netex Server ve Eklenti Eklenmesi
Kurulum işlemlerimiz bittikten sonra Liman MYS arayüzümüze giriş yaparak sunucumuzu ve eklentimizi ekleyebiliriz.
### Sunucu Eklenmesi
- _Tüm sunucuları gör_ seçeneği ile beraber karşımıza çıkan ekranda **Sunucu Ekle ** butonuna tıklanır.
Karşımıza çıkan Bağlantı Bilgileri, Genel Ayarlar, Anahtar Seçimi gibi adımları Netex kurduğumuz server bilgileri ile doldurduktan sonra Netex sunucumuzu Liman'da görebiliriz.
### Eklenti Eklenmesi
- Menüye girilir ve sistem ayarlarına girilir.
- **Eklentiler** sekmesine girilir.
- **Yükle** butonuna tıklanır.
- Gelen ekranda **Gözat** butonuna tıklanarak _netex-master.zip_ dosyası seçilir ve eklentimiz Liman'a eklenmiş olur.
Eklentimiz ve sunucumuz Liman'a eklendikten sonra sunucumuza giderek
_Eklentiler_ kısmından **Ağ Keşif** eklentimizi Netex sunucumuza ekliyoruz.
| yarensari |
1,887,678 | Unlocking the Hidden Treasures of Your Applications | As a developer with over 15 years of experience in the industry, I've seen firsthand how many... | 0 | 2024-06-13T20:31:17 | https://dev.to/jwtiller_c47bdfa134adf302/unlocking-the-hidden-treasures-of-your-applications-ee | dotnet, observeability, productivity | As a developer with over 15 years of experience in the industry, I've seen firsthand how many applications are like locked treasure chests, filled with valuable insights that often go unnoticed while digital pirates lurk, trying to exploit any weaknesses. This realization is what drove me to start RazorSharp. My goal is to help developers unlock this potential, turning raw data into actionable intelligence and ensuring the security of their digital assets.
**The Spark of Inspiration**
The concept for RazorSharp APM was born from my extensive experience in software development. Over the years, I've encountered countless applications that, despite their complexity, remained like treasure chests with a wealth of data locked inside. These chests were not only underutilized but also vulnerable to digital pirates looking to exploit any weaknesses.
**What RazorSharp APM Brings to the Table**
Real-Time Insights: Gain immediate visibility into your application’s performance, helping you identify and resolve issues before they escalate.
AI-Powered Documentation: Automatically generate and maintain comprehensive documentation, easing the workload on your team and ensuring accuracy.
Enhanced Security: Leverage metadata analysis to protect your applications from potential threats, ensuring your valuable data stays secure.
**Why This Matters**
Unlocking the insights hidden within your application can lead to improved performance, enhanced security, and a more streamlined development process. With RazorSharp APM, you’re not just monitoring performance; you’re gaining a deep understanding of your application’s inner workings, driving more informed decisions and strategic enhancements.
**Getting Started with RazorSharp**
To begin unlocking the treasures within your applications, visit our [homepage](https://razorsharp.dev/) for more information. Our [documentation](https://razorsharp.dev/Documentation) offers detailed setup instructions, making it easy to integrate RazorSharp APM into your development workflow.
Join the Adventure
RazorSharp APM is here to help you discover and protect the valuable treasures hidden in your applications. By providing comprehensive insights and robust security, we empower developers to fully realize the potential of their metadata. Join us on this exciting journey to unlock and secure your digital treasures with RazorSharp APM.
Let's turn those locked chests into gold mines of insight and security. 🌟 | jwtiller_c47bdfa134adf302 |
1,887,674 | Scrap Car Gta | Revitalize your urban space while earning cash with Scrap Car GTA, your premier solution for scrap... | 0 | 2024-06-13T20:19:30 | https://dev.to/scrap_cargta/scrap-car-gta-3e4 | towin, services | Revitalize your urban space while earning cash with Scrap Car GTA, your premier solution for scrap car removal in Downtown Toronto, Scarborough, Etobicoke, Pickering, and North York. Say goodbye to that old clunker taking up valuable parking space and hello to extra money in your pocket! Our hassle-free service ensures a seamless process from pickup to payment, leaving you with peace of mind and a cleaner environment.
But that's not all – Scrap Car GTA goes beyond just removing scrap cars. Need towing or roadside assistance? We've got you covered. With our dedicated team and reliable service, you can trust us to handle any automotive situation with professionalism and efficiency.
Don't let that eyesore sit in your driveway any longer. Turn it into cash today with Scrap Car GTA! Visit us at https://scrapcargta.com/ to learn more and schedule your pickup.
 | scrap_cargta |
1,887,670 | 5 Exciting NumPy Challenges to Boost Your Programming Skills! 🚀 | The article is about 5 exciting NumPy challenges curated by LabEx, a leading online platform for coding challenges. These challenges are designed to push the boundaries of your programming skills and expertise in numerical computations using the powerful NumPy library. From mastering advanced sorting and searching algorithms to implementing a handwritten character recognition classifier, this collection offers a diverse range of tasks that will test your problem-solving abilities and deepen your understanding of NumPy's capabilities. Whether you're a beginner or an experienced Python programmer, these challenges provide an opportunity to enhance your skills, explore new concepts, and showcase your talent in the world of data manipulation and analysis. | 27,710 | 2024-06-13T20:10:05 | https://dev.to/labex/5-exciting-numpy-challenges-to-boost-your-programming-skills-1499 | numpy, coding, programming, tutorial |
Are you ready to take your Python programming skills to the next level? LabEx, a leading online platform for coding challenges, has curated a collection of 5 captivating NumPy challenges that will push your problem-solving abilities to new heights! 💪
## Sorting and Searching: Mastering Advanced Algorithms with NumPy 🔍
Dive into the world of high-performance numerical computations with the "Sorting and Searching" challenge. This challenge will test your expertise in implementing cutting-edge sorting and searching algorithms using the powerful NumPy library. Prepare to optimize your solutions and showcase your ability to leverage the full potential of NumPy. [Explore the challenge](https://labex.io/labs/154566)
## Binary Operations Challenge: Manipulate Data at the Bit-Level 🔢
Unlock the true power of binary operations with the "Binary Operations Challenge with NumPy." This challenge will immerse you in real-world scenarios that require a deep understanding of binary operations. Harness the capabilities of the NumPy library to tackle these intricate problems and demonstrate your mastery of bit-level data manipulation. [Dive into the challenge](https://labex.io/labs/153823)
## Reshape, Concatenate, and Split: Mastering NumPy Array Transformations 🧠
In the "Make NumPy Array Your Shape" challenge, you'll encounter a series of sub-challenges that will test your ability to manipulate NumPy arrays. From reshaping arrays to concatenating and splitting them, this challenge will sharpen your skills in managing the dimensions and structure of your data. Prepare to showcase your expertise in NumPy array transformations. [Accept the challenge](https://labex.io/labs/8687)
## Minkowski Distance Metric: Unlocking the Power of Unsupervised Learning 🤖
Explore the fascinating world of unsupervised learning in the "Implementing Minkowski Distance Metric" challenge. This challenge will have you delve into the Minkowski distance metric, a crucial concept in clustering algorithms. Demonstrate your ability to implement this distance metric using NumPy and gain insights into the intrinsic properties of your data. [Dive into the challenge](https://labex.io/labs/300239)
## Handwritten Character Recognition: Build a Classifier from Scratch 🖋️
In the "Simple Handwritten Character Recognition Classifier" challenge, you'll have the opportunity to create a functional handwritten character recognition classifier. Using the DIGITS dataset from scikit-learn, you'll build a custom function that can accurately classify handwritten character images. This challenge will test your skills in data preprocessing, model building, and achieving a high cross-validated classification accuracy. [Embark on the challenge](https://labex.io/labs/300256)
Get ready to embark on an exciting journey of programming mastery! 🎉 Tackle these captivating NumPy challenges and elevate your skills to new heights. Good luck, and happy coding! 💻
---
## Want to learn more?
- 🚀 Practice thousands of programming labs on [LabEx](https://labex.io)
- 🌳 Learn the latest programming skills on [LabEx Skill Trees](https://labex.io/skilltrees/numpy)
- 📖 Read more programming tutorials on [LabEx Tutorials](https://labex.io/tutorials/category/numpy)
Join our [Discord](https://discord.gg/J6k3u69nU6) or tweet us [@WeAreLabEx](https://twitter.com/WeAreLabEx) ! 😄 | labby |
1,887,668 | Daily log: 6/13/24 | Todo List Morning Jog Revisit Kevin Powell's Responsive Design Class Clean up my latest Frontend... | 0 | 2024-06-13T20:03:50 | https://dev.to/moncadad/daily-log-61324-1dgd | Todo List
1. Morning Jog
2. Revisit Kevin Powell's Responsive Design Class
3. Clean up my latest Frontend Mentor Challenge
4. Review Intro React on Scrimba
5. Update Portfolio Skills, and Projects
5. Evening Walk
6. Phlearn Photoshop Daily Tutorial
| moncadad | |
1,887,667 | We need to stop Freewallet scammers | The cryptocurrency world is buzzing with the escalating scandal surrounding the Freewallet crypto... | 0 | 2024-06-13T19:59:23 | https://dev.to/feofhan/we-need-to-stop-freewallet-scammers-36pm | The cryptocurrency world is buzzing with the escalating scandal surrounding the Freewallet crypto scam. Despite the polished reviews and glowing testimonials found online, the reality is starkly different. Numerous users have reported losing their deposits due to deceptive practices disguised as routine KYC (Know Your Customer) procedures. It’s time to take action against this fraudulent service.
Freewallet lures users with promises of a reliable and secure crypto wallet. However, many users end up with frozen accounts and inaccessible funds. The support team notoriously ignores pleas for assistance, leaving victims frustrated and financially stranded.
One victim shared her harrowing experience of how her account was frozen after a large transaction. Despite submitting all required documents and repeatedly contacting support, her account remained blocked for months. This story is not an isolated incident but a common occurrence among Freewallet users.
**How you can help**
To combat this scam, we need your help. If you have fallen victim to Freewallet’s practices, we urge you to take the following steps:
1. Submit a complaint: Make your voice heard by submitting a complaint. Contact us at freewallet-report@tutanota.com with details of your experience. Your stories will help us build a stronger case against Freewallet.
2. Prepare official statements: Write a detailed statement outlining your experience with Freewallet. Include all relevant information, such as dates, transaction details, and communications with the support team. These statements are crucial for legal and media efforts to expose and halt Freewallet’s activities.
**Stand together against fraud**
We can only stop the Freewallet crypto scam with collective action. By coming together and sharing our experiences, we can protect others from falling into the same trap. Let’s hold Freewallet accountable and ensure that justice is served.
Remember, the best way to protect your assets is to avoid fraudulent services. Stay informed, stay vigilant, and let’s put an end to the Freewallet scam.
Victims must organize and collect evidence of Freewallet’s fraudulent activity and pass it to law enforcement. It is important to seek the initiation of criminal proceedings against the creators and participants of this scam project. Financial regulators should intervene, placing the money associated with Freewallet on blacklists to make it difficult to withdraw stolen funds. Ultimately, Interpol should get involved to achieve an arrest and judicial review of the fraud and theft of cryptocurrency.
However, it will be extremely difficult for one user to achieve results alone. The team of scammers behind Freewallet has money, influence, and opportunities. Therefore, it is important that the appeals of the victims be collected and addressed to state bodies, rather than remaining as ordinary posts on the Internet. Otherwise, Freewallet will continue to steal millions from thousands of new victims.
We also suggest you read the truth about Freewallet reviews. New customers often seek the most advertised solutions to keep their assets. Freewallet's scam is successful for the fraudsters because they pay for positive reviews. But real customers also share their stories. If you pay attention to their complaints, you’ll realize that Freewallet is a scam, not a safe and secure crypto wallet!
| feofhan | |
1,887,665 | Recursion 256 chars | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-13T19:56:55 | https://dev.to/fmalk/recursion-256-chars-5d4b | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
Recursion is code on a journey, encountering a smaller version of itself, easier to run, which goes on a journey, encountering a smaller version of itself, easier to run, which goes on a journey... until no more journeys are needed. End of recursion!
## Additional Context
Where's the fun of explaining recursion if not using recursion itself? | fmalk |
1,887,664 | We work at FAANG for free | Imagine a factory where nameless workers are working day and night to produce expensive products.... | 0 | 2024-06-13T19:56:38 | https://dev.to/nooruddin/we-work-at-faang-for-free-g32 | bigdata | Imagine a factory where nameless workers are working day and night to produce expensive products. These expensive products are shipped instantly all over the world to a wealthy buyers generating more than $200 millions per day for that factory.
What if I say those worker doesn’t charge a penny to produce such expensive products?
Sounds impossible, right?
But everyone on earth is already doing such tasks for free! YOU ARE FREE LABORER! This is the modern system created by big tech companies.
Big Tech companies such as FAANG provides us the great tools in our hands like Search, Entertainment, Social Connectivity, Productivity, News Feed and many other services where some of them are free as sweet and tell us our lives will be better with them. But in reality those sweet turns out to be poison where we are giving them free labor.
Every time we browse a site, comment, like, subscribe, purchase, connect, surf, scroll, we are just mining the billion dollar gold bars for them. Using such platforms, we are simply generating data on their server which they serves to other big companies to make each other rich. This is the free labor agreement that we all have signed when we entered the internet world. Data goes out, money comes in ($2 Trillion every year). Where is our piece? Aren’t we the ones making the product?
Generating data helps them to provide us the service better but our data is still worth more than that. This data war is a decade old but aren’t we as a consumer making such expensive products for free? So should they pay us? Should we charge them before using internet? Well, here the irony is we are paying the internet bills just to generate the expensive data for free. It’s still debatable topic where user need to understand how their data is worthy, maybe not for them but certainly for such big companies.
After all, in this internet world we are building, our data shouldn’t be distributed for free.
_If you've enjoyed reading this blog and have learnt at least one new thing, do visit my [blog website](https://blog.noorudd.in)._ | nooruddin |
1,887,663 | From Manuscript to Bestseller: How Book Publishing HQ Can Help | Book Publishing HQ is a premier provider of comprehensive book publishing services, dedicated to... | 0 | 2024-06-13T19:53:21 | https://dev.to/book_publishinghqllc_9a/from-manuscript-to-bestseller-how-book-publishing-hq-can-help-1ho1 | books, publishing | [Book Publishing](https://www.bookpublishinghq.com/) HQ is a premier provider of comprehensive book publishing services, dedicated to helping authors transform their manuscripts into successful, professionally published books. Established with the mission to empower writers and elevate their literary works, Book Publishing HQ offers a full spectrum of services tailored to meet the unique needs of each author.
**Our Vision**
At Book Publishing HQ, we believe that every story deserves to be told with excellence. Our vision is to be the go-to partner for authors seeking to bring their literary visions to life, providing the highest standards of quality, creativity, and professionalism in the publishing industry.
**Our Services**
We offer a wide range of services designed to support authors at every stage of the publishing process:
- **Editing and Proofreading**: Our team of experienced editors provides thorough editing and proofreading services to refine your manuscript and ensure it is polished to perfection.
- **Cover Design**: Our talented designers create custom book covers that capture the essence of your story and attract readers.
- **Interior Formatting**: We offer expert formatting services for both print and digital editions, ensuring a seamless and professional reading experience.
- **Distribution**: Our comprehensive distribution services make your book available through major retailers, libraries, and online platforms worldwide.
- **Marketing and Promotion**: We develop targeted marketing strategies to generate buzz, increase visibility, and drive sales for your book.
- **Author Website and Branding**: We help authors build a strong online presence with professional website design and branding services.
- **Author Support and Resources**: From writing workshops to publishing consultations, we provide ongoing support and resources to help authors succeed.
**Our Commitment**
Book Publishing HQ is committed to excellence in every aspect of the publishing process. We pride ourselves on our personalized approach, tailoring our services to meet the specific goals and needs of each author. Our team of industry professionals brings years of experience and a passion for storytelling to every project, ensuring that your book is produced to the highest standards.
**Why Choose Book Publishing HQ?**
- **Expertise**: Our team consists of seasoned professionals with extensive experience in editing, design, marketing, and distribution.
- **Personalized Service**: We offer customized solutions that cater to your unique needs and objectives.
- **Comprehensive Support**: From manuscript to market, we provide a full range of services to support you at every stage of your publishing journey.
- **Quality Assurance**: We are dedicated to producing high-quality books that meet industry standards and exceed reader expectations.
At [Book Publishing](https://www.bookpublishinghq.com/) HQ, we understand the power of stories and are passionate about helping authors share theirs with the world. Partner with us to bring your literary vision to life and achieve your publishing dreams.
| book_publishinghqllc_9a |
1,887,662 | Estudos em Quality Assurance (QA) - Jira: O Básico de Gerenciamento de Issues | As issues no Jira variam em tamanho e complexidade, podendo levar de horas a meses para serem... | 0 | 2024-06-13T19:51:30 | https://dev.to/julianoquites/estudos-em-quality-assurance-qa-jira-o-basico-de-gerenciamento-de-issues-80e | jira, testing, qa, beginners |
As issues no Jira variam em tamanho e complexidade, podendo levar de horas a meses para serem concluídas. Cada issue é composta por vários componentes, que são:
- **Chave da issue (Issue Key):** Identificador único.
- **Resumo (Summary):** título.
- **Descrição (Description):** Informações detalhadas.
- **Data de Conclusão (Due Date):** O prazo para conclusão.
- **Responsável (Assignee):** A pessoa atribuída para trabalhar na issue.
- **Relator (Reporter):** Criador da issue.
- **Rótulos (Labels):** Categorias para ajudar a organização das issues.
**Tipos de Issues padrão:**
- **Epic:** Uma grande iniciativa, muitas vezes servindo como uma issue "pai" que contém tarefas menores.
- **Story:** Um recurso ou requisito pela perspectiva do usuário.
- **Bug:** Um erro ou problema.
- **Task:** O tipo mais comum de issue, detalhando um item de trabalho (work item) específico.
- **Subtask:** Uma parte menor de uma tarefa, história ou bug.
**Criação e Gerenciamento de Issues:** Para criar uma issue, selecione o projeto, o tipo de issue, forneça um resumo e uma descrição, depois clique em criar, desse jeito:
**projeto → tipo de issue → summary → descrição → criar**
É também crucial entender como as issues se relacionam entre si, pois as relações podem indicar **dependências (depende de/é dependente de), bloqueios (bloqueia/é bloqueado por)** ou **replicações (clona/é clonado por)**.
**IMPORTANTE!**
Atualize seus work items todos os dias para refletir o progresso ou adicionar informações relevantes. Se você concluiu uma tarefa, tem perguntas ou precisa compartilhar notas de uma reunião, manter suas issues atualizadas é essencial.
**Navegando em Projetos e Boards**
**Projetos**: é uma coleção de issues. Os projetos geralmente têm nomes relacionados à equipe ou versão de lançamento, com chaves de projeto (project keys) sendo versões mais curtas desses nomes para ajudar a identificar as issues. Por exemplo:
- Nome do Projeto: Equipe de Design de Jogos
- Chave do Projeto: EDJ
- Issues: EDJ-1, EDJ-2, e assim por diante.
Os projetos podem ser gerenciados pela equipe (**team-managed project**) ou pela empresa (**company-managed project**), proporcionando flexibilidade na forma de controle e monitoramento do progresso.
**Boards:** Boards são displays visuais do progresso do seu projeto. Eles podem conter várias colunas, como **A Fazer (To do), Em Progresso (In Progress), Em Revisão (In Review)** e **Concluído (Done)**. Existem dois tipos principais de boards:
- Kanban: Adequado para todos os tipos de equipes, oferecendo um fluxo contínuo de tarefas.
- Scrum: Principalmente usado por equipes ágeis de desenvolvimento de software, organizando o trabalho em sprints.
As issues geralmente são encontradas no **Backlog**, que lista as tarefas que ainda não começaram. Para visualizar de maneira cronológica e gerenciar melhor os prazos e o progresso, use o **Cronograma (Timeline)**.
| julianoquites |
1,887,661 | 🚀Notcoin (NOT) Overtakes SHIB in Top Ranks as SHIB Volume Drops Dramatically | Notcoin (NOT) has surged in popularity, surpassing Shiba Inu (SHIB) in trading volume and market cap... | 0 | 2024-06-13T19:49:16 | https://dev.to/irmakork/notcoin-not-overtakes-shib-in-top-ranks-as-shib-volume-drops-dramatically-4bg5 |
Notcoin (NOT) has surged in popularity, surpassing Shiba Inu (SHIB) in trading volume and market cap rankings within the cryptocurrency market. Notcoin's trading volume spiked by 67% to $926.27 million over June 12-13, elevating it to the 12th most traded crypto asset. In contrast, SHIB's trading volume decreased by 36% to $555.92 million during the same period.
This surge propelled Notcoin's price up by 8% to $0.0177, boosting its market cap to $1.81 billion, positioning it as the 54th largest cryptocurrency. Notcoin differentiates itself as a gaming tap-to-earn project on Telegram, where users earn NOT tokens by tapping on virtual coins. With over 35 million participants, Notcoin has gained listing on major exchanges like WhiteBIT, Bybit, and OKX.
The success of Notcoin underscores a growing trend in user engagement through gaming applications in the crypto market. However, experts caution about the sustainability of this trend, questioning how long the heightened interest and participation will endure.
| irmakork | |
1,887,660 | 🤯513 Million Bitcoin (BTC) in 24 Hours, Here's What's Coming | The cryptocurrency market, particularly Bitcoin, has reacted negatively to the latest United States... | 0 | 2024-06-13T19:49:00 | https://dev.to/irmakork/513-million-bitcoin-btc-in-24-hours-heres-whats-coming-3p0a |
The cryptocurrency market, particularly Bitcoin, has reacted negatively to the latest United States Producer Price Index (PPI) data for May. The PPI showed a month-on-month decrease of -0.2%, contrasting with the previous 0.5% increase. This unexpected decline suggests that the Federal Reserve's efforts to stabilize inflation are yielding results, which could bolster traditional asset investments over riskier ones like Bitcoin.
As of now, Bitcoin has experienced a notable 3.76% decline in the past 24 hours, trading at $67,351. This downturn marks a departure from the earlier bullish momentum that briefly pushed Bitcoin above $70,000 earlier in the week. The market sentiment reflects concerns that a stronger PPI indicates a resilient economy, potentially diverting corporate investments towards traditional assets.
Despite the current market reaction, the introduction and trading of spot Bitcoin Exchange-Traded Funds (ETFs) in various global markets (including the US, UK, Canada, Hong Kong, and Australia) provide optimism for Bitcoin's long-term outlook. These ETFs offer new avenues for investors to buy Bitcoin, which could contribute to a bullish trend over time.
In the last 24 hours alone, over 513 million Bitcoin, equivalent to $34.29 billion, has been traded globally, showcasing substantial trading volume despite the recent decline. This volume hints at underlying bullish sentiment that could aid Bitcoin in overcoming its current challenges and potentially resume an upward trajectory.
| irmakork | |
1,887,659 | 🚀Pepe Coin Surges 10% in 24 Hours | After a bearish start to the month, a few altcoins have soared in price, to the delight of crypto... | 0 | 2024-06-13T19:48:41 | https://dev.to/irmakork/pepe-coin-surges-10-in-24-hours-355 |
After a bearish start to the month, a few altcoins have soared in price, to the delight of crypto fans and investors. A classic example is Pepe Coin, which has defied the broader crypto market trend by surging over 10% in the past 24 hours. It currently trades above $0.000013.
While major cryptos like ETH, SOL, and DOGE remain sluggish, Pepe Coin’s impressive performance underscores that the bulls are still in charge. This signals investors can explore new Initial Coin Offerings (ICOs) poised for early gains. Indeed, this is not a walk in the park, as dozens of presales exist in the market.
| irmakork | |
1,887,658 | 💥Pepe Surges 17.85% with Strong Bullish Indicators Pointing to a Potential 50% Rally by June’s End | PEPE showed a promising 17.85% rise to $0.00001340 on June 12, supported by increased trading volumes... | 0 | 2024-06-13T19:48:21 | https://dev.to/irmakork/pepe-surges-1785-with-strong-bullish-indicators-pointing-to-a-potential-50-rally-by-junes-end-hop | PEPE showed a promising 17.85% rise to $0.00001340 on June 12, supported by increased trading volumes and a rebound from its lower trendline in a rising wedge pattern. This pattern suggests potential support, aiming for an upper trendline target around $0.00002661, indicating a potential 70% increase.
Critical support levels like the 50-day EMA and 1.0 Fibonacci retracement line bolster this bullish scenario. Stable whale accumulation, with major holders retaining 96.02% of PEPE supply, and active retail accumulation further enhance market confidence.
Expectations of a Federal Reserve rate cut in September also support a bullish outlook for PEPE and other cryptocurrencies, as lower bond yields increase interest in risk assets like memecoins.
| irmakork | |
1,887,657 | Blockchain in 256 chars | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-13T19:45:50 | https://dev.to/ruttosa/blockchain-in-256-chars-d9m | devchallenge, cschallenge, computerscience, beginners | _This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer._
## Explainer
<!-- Explain a computer science concept in 256 characters or less. -->
**Blockchain** is like a giant ledger that register transactions, but secured with cryptography and grouped into linked blocks, validated by a consensus mechanism executed by the network participants that ensures transactions veracity before being registered
## Additional Context
<!-- Please share any additional context you think the judges should take into consideration as it relates to your One Byte Explainer. -->
A **transaction** is any action taken on a blockchain network, and in the context of a giant ledger example represents the register of an Income or an Outcome, using criptographies techniques to hide the data included on it.
**Blockchain** literally means a "chain of blocks", because of every time a block is validated by the validators nodes (a.k.a. Miners), this is added to the end of the chain, linked to the last block.
**Validators** nodes are in charge of mantain the integrity of the blockchain, using a consensus mechanism to validate the transactions added to the network before registered them forever in a new block, in exchange for a reward.
A **Consensus Mechanism** is the way how validators nodes agree each other that a transaction is valid or not. Just to know, there are a few methods to achieve this but the main ones are called Proof of Work (PoW, used by Bitcoin) and Proof of Stake (PoS, used by Ethereum), however, the details about how them work is not for this post.
---
_Infographic: <a href="https://www.freepik.com/free-vector/infographic-blockchain-concept_2463655.htm#query=blockchain%20diagram&position=2&from_view=keyword&track=ais_user&uuid=8153d8b8-1ee5-418b-8b20-b23c7cedae20">Image by freepik</a>_
_Cover: <a href="https://www.freepik.com/free-ai-image/3d-rendering-blockchain-technology_196469768.htm#query=blockchain&position=0&from_view=keyword&track=sph&uuid=49d63793-06d9-4fbf-ae3b-031967d88a4d">Image by freepik</a>_
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
<!-- Don't forget to add a cover image to your post (if you want). -->
<!-- Thanks for participating! --> | ruttosa |
1,886,043 | Announcing NgRx 18: NgRx Signals is almost stable, ESLint v9 Support, New Logo and Redesign, Workshops, and more! | Announcing NgRx 18: NgRx Signals is almost stable, ESLint v9 Support, New Logo and Redesign, Workshops, and more! | 0 | 2024-06-13T19:41:00 | https://dev.to/ngrx/announcing-ngrx-18-ngrx-signals-is-almost-stable-eslint-v9-support-new-logo-and-redesign-workshops-and-more-17n2 | ngrx, angular | ---
title: Announcing NgRx 18: NgRx Signals is almost stable, ESLint v9 Support, New Logo and Redesign, Workshops, and more!
published: true
description: Announcing NgRx 18: NgRx Signals is almost stable, ESLint v9 Support, New Logo and Redesign, Workshops, and more!
tags: ngrx, angular
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/7nanfgli8e2ex6yhd5pw.png
# Use a ratio of 100:42 for best results.
published_at: 2024-06-13 21:41 +0200
---
We are pleased to announce the latest major version of the NgRx framework with some exciting new features, bug fixes, and other updates.
---
## Stable NgRx Signals 🚦 (it's almost there)
In NgRx version 17 we announced NgRx Signals, which was and still is in developer preview.
From the first release [Marko Stanimirović](https://x.com/markostdev) further improved and stabilized `@ngrx/signals` with the help of the community. A special thanks to [Rainer Hahnekamp](https://x.com/rainerhahnekamp) for his thoughts, feedback, and the provided help.
There are still some loose ends that need to be ironed out, but we're planning to officially release a stable version in one of the next minor releases. We're confident that this brings a solid, flexible, and scalable reactive state management solution with good developer ergonomics for Angular Signals.
This means that after a year of hard work, we're getting close to getting `@ngrx/signals` out of the the developer preview phase.
From the look of it our users are ready for the release, as we're seeing a lot of excitement and positive feedback. The numbers also show that the usage of `@ngrx/signals` is increasing gradually, [hitting 50k downloads per week](https://www.npmjs.com/package/@ngrx/signals).
To get started with `@ngrx/signals`, install the package via one of the commands below and follow the [`@ngrx/signals` Guide](https://ngrx.io/guide/signals).
```bash
# We're waiting to release @ngrx/signals@18.0.0
# Currently, you can use release candidate with Angular 18 apps
npm install @ngrx/signals@next
```
You can also use the ng add command:
```
# We're waiting to release @ngrx/signals@18.0.0
# Currently, you can use release candidate with Angular 18 apps
ng add @ngrx/signals@next
```
## ESLint Plugin support for ESLint v9 🧹
In this release, we've added support for [ESLint v9](https://eslint.org/blog/2024/04/eslint-v9.0.0-released/). This means that you can now use the NgRx ESLint plugin with the latest version of ESLint. The plugin is designed to help you write better NgRx code by providing rules that enforce best practices and help you avoid common mistakes for working with packages from the NgRx platform.
We also took the opportunity to update the pre-configured rules to make it easier for you to get started with the plugin, including new new set of rules for `@ngrx/signals`.
If you're experiencing any issues with the plugin, please check the updated [documentation](https://ngrx.io/guide/eslint-plugin) to find the new subdivisions of our rules.
You don't have to worry about the compatibility of the plugin, because we've ensured that this is backwards compatible with older versions of ESLint as well.
If you're interested in using the plugin with ESLint v9, you can import and configure the plugin from `@ngrx/eslint-plugin/v9`:
```js
const tseslint = require("typescript-eslint");
const ngrx = require("@ngrx/eslint-plugin/v9");
module.exports = tseslint.config({
files: ["**/*.ts"],
extends: [
// 👇 Use all rules or only import the rules for a specific package
...ngrx.configs.all,
...ngrx.configs.store,
...ngrx.configs.effects,
...ngrx.configs.componentStore,
...ngrx.configs.operators,
// 🎉 New rules for @ngrx/signals
...ngrx.configs.signals,
],
rules: {
// 👇 Configure specific rules
"@ngrx/with-state-no-arrays-at-root-level": "warn",
},
});
```
> If you want to migrate to ESLint v9, we encourage to update Angular ESLint to the [latest version (v18)](https://github.com/angular-eslint/angular-eslint/releases/tag/v18.0.0) as well.
## New NgRx Operators Package 🛠️
In NgRx v17 we introduced the new package `@ngrx/operators` as a place for common and useful RxJS operators that are used in Angular applications.
The v18 release continues the migration of the `concatLatestFrom` (from `@ngrx/effects`) and `tapResponse` (from `@ngrx/component-store`) RxJS operators to `@ngrx/operators`. From NgRx v18 the operators are only available from `@ngrx/operators` and are no longer part of the `@ngrx/effects` and `@ngrx/component-store` packages.
## New Logo and Redesign of ngrx.io 💅
If you haven't noticed yet, we've updated the NgRx logo to a new look that follows the new Angular branding.
Many thanks to designs from our community, in the end we decided to go with the design from [Robin Goetz](https://x.com/goetzrobin), thanks Robin!.
The new logo (in purple and white) can be found on our [Press Kit](https://ngrx.io/presskit) page, so make sure you've updated the logo in your content.
After using our website [ngrx.io](https://ngrx.io/) for a while now, we're thinking that it's time for a redesign.
Behind the scenes [Mike Ryan](https://x.com/MikeRyanDev) is working on a new version of the NgRx website.
The new website is build up from scratch using [Analog.js](https://analogjs.org/) and will have a brand-new design and revamped content.
This to make sure to offer the best possible experience to our users and to make it easier to find the information you need.
It also ensures that the website will become easier to maintain and update.
Because we're a community-driven project, we're keeping in mind that the website should be easy to contribute to.
## Deprecations and Breaking Changes 💥
This release contains bug fixes, deprecations, and breaking changes. For most of these deprecations or breaking changes, we've provided a migration that automatically runs when you upgrade your application to the latest version.
We want to highlight one breaking change in particular, which we expect to have a big impact.
Because we've seen many users import the `TypedAction` type via a deep import (which is not recommended), we've decided to merge the `TypedAction` type with the `Action` type in the `@ngrx/store` package. If you're using the `ng update` schematics, the migration automatically updates your imports to use the new location.
Take a look at the [version 18 migration guide](https://ngrx.io/guide/migration/v18) for complete information regarding migrating to the latest release. The complete [CHANGELOG](https://github.com/ngrx/platform/blob/main/CHANGELOG.md) can be found in our GitHub repository.
---
## Upgrading to NgRx 18 🗓️
To start using NgRx 18, make sure to have the following minimum versions installed:
- Angular version 18.x
- Angular CLI version 18.x
- TypeScript version 5.4.x
- RxJS version ^6.5.x or ^7.5.x
NgRx supports using the Angular CLI ng update command to update your NgRx packages. To update your packages to the latest version, run the command:
```bash
ng update @ngrx/store@l8
```
If your project uses `@ngrx/component-store` or `@ngrx/signals`, but not `@ngrx/store`, run the following command:
```bash
# To update @ngrx/component-store
ng update @ngrx/component-store@18
# We're waiting to release @ngrx/signals@18.0.0
# Currently, you can use release candidate with Angular 18 apps
ng update @ngrx/signals@next
```
---
## NgRx Workshops 🎓
With NgRx usage continuing to grow with Angular, many developers and teams still need guidance on how to architect and build enterprise-grade Angular applications. We are excited to introduce upcoming workshops provided directly by the NgRx team!
We're offering one to three full-day workshops that cover the basics of NgRx to the most advanced topics. Whether your teams are just starting with NgRx or have been using it for a while - they are guaranteed to learn new concepts during these workshops.
The workshop covers both global state with NgRx Store and libraries, along with managing local state with NgRx ComponentStore and NgRx Signals.
Visit our [workshops page](https://ngrx.io/workshops) to sign up from our list of upcoming workshops. The next workshops are scheduled for September 18-20 (US-based time) and October 16-18 (Europe-based time).
---
## Swag Store and Discord Server 🦺
You can get official NgRx swag through our store! T-shirts with the NgRx logo are available in many different sizes, materials, and colors. We will look at adding new items to the store such as stickers, magnets, and more in the future. [Visit our store](https://ngrx.threadless.com/) to get your NgRx swag today!
Join our [Discord server](https://discord.com/invite/ngrx) for those who want to engage with other members of the NgRx community, old and new.
---
## Contributing to NgRx 🥰
We're always trying to improve the docs and keep them up-to-date for users of the NgRx framework. To help us, you can start contributing to NgRx. If you're unsure where to start, come take a look at our [contribution guide](https://ngrx.io/contributing) and watch the [introduction video](https://youtu.be/ug0c1tUegm4) [Jan-Niklas Wortmann](https://x.com/niklas_wortmann) and [Brandon Roberts](https://x.com/brandontroberts) have made to help you get started
---
## Thanks to all our contributors and sponsors! 🏆
NgRx continues to be a community-driven project. Design, development, documentation, and testing all are done with the help of the community. Visit our [community contributors section](https://ngrx.io/about?group=Community) to see every person who has contributed to the framework.
If you are interested in contributing, visit our [GitHub](https://github.com/ngrx/platform) page and look through our open issues, some marked specifically for new contributors. We also have active GitHub discussions for new features and enhancements.
We want to give a big thanks to our Gold sponsor, [Nx](https://nx.app/company)! Nx has been a longtime promoter of NgRx as a tool for building Angular applications, and is committed to supporting open source projects that they rely on.
We want to thank our Bronze sponsor, [House of Angular](https://houseofangular.io)!
Lastly, we also want to thank our individual sponsors who have donated once or monthly.
If you are interested in sponsoring NgRx, visit our [GitHub sponsors](https://github.com/sponsors/ngrx) page.
Follow us on [Twitter](https://x.com/ngrx_io) and [LinkedIn](https://www.linkedin.com/company/ngrx) for the latest updates about the NgRx platform.
| timdeschryver |
1,887,655 | Unlocking the Power of Bing Search Engine API: Your Guide to a Free Search API | In today's digital age, harnessing the vast realm of data available on the internet is crucial for... | 0 | 2024-06-13T19:32:36 | https://dev.to/sameeranthony/unlocking-the-power-of-bing-search-engine-api-your-guide-to-a-free-search-api-14ff | In today's digital age, harnessing the vast realm of data available on the internet is crucial for businesses and developers alike. Search engines play a pivotal role in accessing this wealth of information efficiently. Among them, Bing stands out as a formidable contender with its robust Bing Search Engine API. This article delves into how you can leverage the Bing Search Engine API, particularly focusing on its [free search API](**https://zenserp.com/**) offerings.
## Understanding Bing Search Engine API
Bing Search Engine API offers developers a gateway to tap into Bing's powerful search capabilities programmatically. This API provides access to a variety of search functionalities, allowing applications to retrieve web, image, video, news, and other search results directly. Whether you're building a website, mobile app, or integrating search capabilities into an existing platform, Bing's API can significantly enhance user experience by delivering relevant and up-to-date content.
## Features and Benefits of Bing Search Engine API
Comprehensive Search Capabilities: Bing API offers comprehensive search capabilities across various types of content, including web pages, images, videos, news articles, and more. This versatility ensures developers can tailor their applications to retrieve the specific type of data required for their users.
Customizable Parameters: Developers can fine-tune search queries using customizable parameters such as filters, sorting options, and geographic preferences. This flexibility enables precise retrieval of information tailored to specific user needs.
Rich Results: Bing Search API provides rich results with metadata, enabling applications to display more than just links. This includes thumbnail images, summaries, source URLs, and other relevant information directly within search results.
Language Support: With support for multiple languages, Bing API facilitates global reach, allowing developers to create multilingual applications without language barriers.
## Getting Started with Bing Search Engine API
**Step 1: Sign Up for Bing Search API Access
**To begin using Bing Search Engine API, you need to sign up for an API key through the Microsoft Azure portal. This key authenticates your requests and allows access to Bing's search functionalities. The process involves creating an Azure account if you don't already have one, navigating to the Azure Marketplace, and subscribing to the Bing Search API service.
**Step 2: Choose the Right API Endpoint
**Bing Search API offers different endpoints tailored to specific types of search queries. For instance, you can choose endpoints for web search, image search, video search, news search, and more. Select the endpoint that aligns with the type of content you intend to retrieve.
**Step 3: Construct and Send Queries
**Once you have obtained your API key and selected the appropriate endpoint, you can start constructing queries using HTTP requests. Bing API supports both simple queries and advanced search options, allowing you to specify parameters such as search term, count of results, filters, and sorting criteria.
**Step 4: Integrate API Responses
**Upon sending a request, Bing API returns JSON-formatted responses containing relevant search results based on your query parameters. These responses can be seamlessly integrated into your application, allowing you to display search results in a user-friendly format tailored to your design.
**Free Search API Options**
For developers looking to explore Bing's capabilities without initial costs, Bing Search Engine API offers a free tier with limited usage. This free tier typically includes a set number of transactions per month, providing an opportunity to test and integrate Bing's search functionalities into applications at no cost.
**Use Cases for Bing Search Engine API
**
1. E-commerce Platforms: Integrate product search capabilities to enhance shopping experiences with rich product listings and related images.
2. Content Aggregation: Aggregate news articles or blog posts relevant to specific topics of interest, enriching content discovery for users.
3. Educational Tools: Develop educational apps that fetch relevant information, images, and videos for research purposes or learning materials.
4. Geolocation Services: Implement location-based search to retrieve nearby places, businesses, or services based on user preferences.
**Conclusion**
In conclusion, [Bing Search Engine API](https://zenserp.com/pricing-plans/) empowers developers with robust tools to integrate powerful search functionalities into applications seamlessly. Whether you're seeking web content, images, videos, or news updates, Bing API offers customizable solutions to meet diverse needs. By leveraging the free search API options, developers can explore Bing's capabilities with minimal financial commitment, making it accessible for both startups and established businesses alike. Start harnessing the potential of Bing Search Engine API today to elevate your applications and provide users with enriched search experiences.
Harness the power of Bing Search Engine API to unlock a world of possibilities in data retrieval and user engagement. Whether you're building a new application or enhancing an existing one, Bing's comprehensive search functionalities and free API options provide the tools you need to succeed in today's competitive digital landscape.
| sameeranthony | |
1,887,653 | Secure Your Applications: Introducing CyberSentinel's Powerful APIs | In today's digital age, security is paramount. Whether you're managing personal accounts or... | 0 | 2024-06-13T19:26:09 | https://dev.to/pr0biex/secure-your-applications-introducing-cybersentinels-powerful-apis-9da | cybersecurity, security, digitalworkplace, data | > In today's digital age, security is paramount. Whether you're managing personal accounts or safeguarding sensitive business data, having robust tools at your disposal is non-negotiable. Enter CyberSentinel's suite of APIs — designed to fortify your digital defenses effortlessly.
[IPLocateX](https://rapidapi.com/cybersentinel-cybersentinel-default/api/iplocatex)
Instantly retrieve precise geolocation data with IPLocateX. Whether for targeted advertising, fraud prevention, or compliance, our API delivers accurate results in milliseconds.
[CardVerify](https://rapidapi.com/cybersentinel-cybersentinel-default/api/cardverify)
Validate card numbers and retrieve issuer information swiftly with CardVerify. Designed for efficiency and accuracy, it's an essential tool for any financial or e-commerce platform.
[Hash Generator](https://rapidapi.com/cybersentinel-cybersentinel-default/api/hash-generator2)
Generate cryptographic hashes using various algorithms such as MD5, SHA-1, SHA-256, SHA-512, and SHA-224. Ideal for securing passwords, verifying file integrity, and more.
[Password Checker](https://rapidapi.com/cybersentinel-cybersentinel-default/api/password-checker2)
Ensure your passwords meet stringent security criteria with our advanced complexity rules algorithm. From length requirements to character diversity and special character usage, our API provides comprehensive analysis to strengthen your security measures effectively.
[Captcha Generator](https://rapidapi.com/cybersentinel-cybersentinel-default/api/captcha-generator1)
Protect your websites from bots and ensure user authenticity with our fast and reliable Captcha generation API. Simplify your security protocols without compromising on effectiveness.
[URL Encoder/Decoder](https://rapidapi.com/cybersentinel-cybersentinel-default/api/url-encoder-decoder)
Effortlessly encode sensitive information or decode complex URLs with our versatile API. Whether you're securing data or improving readability, our service ensures seamless URL manipulation.
[Random Password Generator](https://rapidapi.com/cybersentinel-cybersentinel-default/api/random-password1)
Creating secure passwords just got easier. Our API allows you to generate random passwords of any desired length, complete with a mix of uppercase and lowercase letters, numbers, and special characters. Perfect for enhancing security across all your platforms.
**Where to Integrate CyberSentinel APIs?**
To leverage these powerful tools and bolster your digital security, integrate CyberSentinel's APIs into your:
- **E-commerce Platforms**: Enhance user account security and transaction safety.
- **Financial Services**: Validate payments and protect sensitive financial data.
- **Web Development Projects**: Secure user sessions and prevent unauthorized access.
- **Mobile Applications**: Ensure data security and user authentication.
Start Securing Today
Ready to elevate your security infrastructure? Visit CyberSentinel to explore our APIs and start integrating today. Strengthen your digital defenses with [CyberSentinel](https://rapidapi.com/team/cybersentinel-cybersentinel-default) — because security shouldn't be an afterthought. | pr0biex |
1,887,652 | STEPS IN DEPLOYING WINDOW 11 VM ON AZURE. | TABLE OF CONTENTS Introduction Steps in creating a window 11 VM on Azure Advantages of an Azure VM... | 0 | 2024-06-13T19:25:58 | https://dev.to/collins_uwa_1f4dc406f079c/steps-in-deploying-window-11-vm-on-azure-31n6 | azure, virtualmachine, windows, cloud | **TABLE OF CONTENTS**
1. Introduction
2. Steps in creating a window 11 VM on Azure
3. Advantages of an Azure VM to organizations.
## Introduction :
An Azure Virtual Machine(VM) is a scalable computing resource provided by Microsoft Azure that allows users to run applications and services in the cloud. Some key points about Azure VMs are :
a) **Infrastructure as a Service(IaaS)**:
Azure VMs are part of Microsoft's IaaS offerings , giving users the
users the flexibility to deploy and manage virtualized instances
without the need for on-premises hardware.
b)**Customizability**: Azure VMs can be customized to fit specific needs
including CPU, memory, storage and networking configurations.
c)**Scalability**: Azure provides tools for scaling VMs up and down based
on demand, allowing for cost and efficiency and performance optima-
zation.
d)**Deployment Options**: VMs can be deployed using Azure's portal, comm-
and-line tools , or automation tools like Azure Resource Manager te-
mplates.
e)**Uses**: Common uses include hosting applications, databases, develo-
pment environments, and running complex computations or simulations.
f)**Integration**: Azure VMs integrate with other Azure services such as
Azure storage, Azure Virtual Networks, and Azure Active Directory.
## STEPS BY STEPS DETAILS OF HOW TO DEPLOY AND CONNECT VM ON AZURE
Deploying and connecting a virtual Machine (VM) on Azure involves several
steps . For the purpose of this assignment I am going to create a VM named UWACO-VM.
**Step 1: Sign in Azure Portal**
create an Azure account in the Azure portal with email and a password and signed in.
**Step 2: Create a Virtual Machine**
a) Once the account is created with an active subscription, navigated to the left-hand menu and click on "Virtual Machines".
b) **The basic Tab was open**:
The basic open up to choose
. Subscription
. Resource Group Name which in this case i choose UWACOM-RG
. Virtual Machine Name : UWACO-VM
. Region was selected to : West Europe
. Availability options: No infrastructure redundancy required
. Security Type was set : Standard
. Image was set on : Window 11
. Choose size
. Create Administrative Username and Password to connect to the VM.
**STEP 3: Disk**
. Was left on default.
**STEP 4: Networking**
. Was left on default.
**STEP 5: Management**
. Was left on default.
**STEP 6 : Monitoring**
.Was left on default.
**STEP 7: Advance**
. Was left on default.
**STEP 8 : Tags**
.Was left on default.
**STEP 9 : Review and Create**
. Validation was passed.
**STEP 10 : Create**
.This initiated deployment.
**STEP 10 : Deployment Completed**
**STEP 11: Click on go to Resource**
. ThSis displayed the image below -
**STEP 12: Connect**
. This connect to the VM's ip address and information about the VM.
**STEP 12 : The file was downloaded**
. This leads to putting in password for UWACO
. A new window was opened meaning the process was successful and a VM running on Window 11 was created.
| collins_uwa_1f4dc406f079c |
1,887,600 | Simplifying Selenium Projects with Containerized Chrome | Today, I stumbled upon a game-changing solution for my Selenium projects, and I wanted to share my... | 0 | 2024-06-13T19:18:00 | https://dev.to/mohitmajumdar/simplifying-selenium-projects-with-containerized-chrome-43ll | webdev, python, selenium, docker |
Today, I stumbled upon a game-changing solution for my Selenium projects, and I wanted to share my experience. Over the past few months, I’ve been grappling with the challenge of hosting my project in the cloud. The main issue was that my project involves opening a browser to scrape data, which made things complex.
Initially, I thought about using a Windows server, downloading Chrome on it, and running the code there. However, this approach quickly became too resource-intensive and unwieldy. Managing the server and ensuring everything ran smoothly was a headache, and it didn’t seem like a sustainable solution.
During my research, I came across an alternative that changed everything: containerized Chrome with Selenium. For those unfamiliar, containerization allows you to bundle your application with all its dependencies into a "container" that can run consistently across different computing environments. This means you can deploy your Selenium projects with Chrome in a much more lightweight and scalable manner.
I decided to give it a try, and the results have been fantastic. Setting up containerized Chrome in the cloud was straightforward, and it significantly reduced the load on my resources. Not only did it make the deployment process easier, but it also enhanced the performance and reliability of my scraping tasks.
If you’re facing similar challenges with hosting Selenium projects, I highly recommend looking into containerized Chrome. It has made my life much easier, and I believe it can do the same for you. Embracing this approach has been a game-changer, turning a cumbersome task into a streamlined process.
Give it a try, and see the difference it can make for your projects! | mohitmajumdar |
1,884,431 | Google SignIn in react-native using firebase auth | If you're looking for a solution without firebase, I've a medium article for that:... | 0 | 2024-06-13T19:14:42 | https://dev.to/thechaudhrysab/google-signin-in-react-native-using-firebase-auth-2nop | reactnative, firebase, typescript, javascript | > If you're looking for a solution without firebase, I've a medium article for that: [https://medium.com/@ibjects/google-signin-tutorial-for-react-native-81a57fb67b18](https://medium.com/@ibjects/google-signin-tutorial-for-react-native-81a57fb67b18)
Straight-forward way of implementing a google sign-in in a react native app using firebase.
## Firebase Console
Add Google from the **Additional Providers**.
Note down your `Web client ID`.
Once it's done it should look like:
## React-Native
Let's install the required libraries:
```
yarn add @react-native-firebase/app @react-native-firebase/auth
yarn add @react-native-google-signin/google-signin
```
Create a `Login.tsx` screen. There are a few things that work together here:
1. Checking `onAuthStatusChanged` using `auth` from `@react-native-firebase/auth` to check the current status of the user authentication.
2. Configure `GoogleSignin` using `GoogleSignin.configure` where we'll provide `webClientId` which you should have at the time of the firebase console side configuration.
3. Handle `onGoogleButtonPress` and `renderGoogleSigninButton` as we'll be creating our own button to trigger a `GoogleSignin` request.
4. Once a user is logged in then rendering a `renderLogoutView` and `return` main components.
Below is the code for `Login.tsx` broken down as per the number list above:
```
// 1.
import auth, { FirebaseAuthTypes } from '@react-native-firebase/auth';
// other imports and code
const [user, setUser] = React.useState<FirebaseAuthTypes.User | null>();
function onAuthStatusChanged(user: FirebaseAuthTypes.User | null) {
setUser(user);
}
useEffect(() => {
const subscriber = auth().onAuthStateChanged(onAuthStatusChanged);
return subscriber; // unsubscribe on unmount
}, []);
```
```
// 2.
import { GoogleSignin } from "@react-native-google-signin/google-signin";
//... other imports and everything in 1.
GoogleSignin.configure({
webClientId: 'ADD_YOUR_KEY_HERE',
offlineAccess: true,
});
```
If required, look for `Web client ID` reference above to know where to get it.
```
// 3a. onGoogleButtonPress
async function onGoogleButtonPress() {
if (user) {
// user is already logged in so no need to do anything
return null;
}
try {
// Check if your device supports Google Play
await GoogleSignin.hasPlayServices({ showPlayServicesUpdateDialog: true });
// Get the users ID token
const { idToken, user, serverAuthCode } = await GoogleSignin.signIn(); // returns type: User
const { id, name, email, photo, familyName, givenName } = user;
console.log('serverAuthCode: ', serverAuthCode);
console.log('idToken: ', idToken);
// Create a Google credential with the token
const googleCredential = auth.GoogleAuthProvider.credential(idToken);
// Sign-in the user with the credential
return auth().signInWithCredential(googleCredential);
} catch (error) {
console.error('ERROR: ', error);
return null;
}
}
```
With a simple `GoogleSignin.signIn()` it'll automatically handles everything.
Now we'll implement the google sign in button component:
```
// 3b. renderGoogleSigninButton
const renderGoogleSigninButton = () => {
const buttonTitle = user ? `Signed in as: ${user.displayName}` : 'Continue with Google'
return (
<Pressable style={styles.buttonContainer} onPress={() => onGoogleButtonPress().then((value: FirebaseAuthTypes.UserCredential | null) => {
// The onGoogleButtonPress will update the setUser state, so no action needed here
if (value) {
console.log('value.additionalInnfo: ', value.additionalUserInfo);
console.log('value.user: ', value.user);
}
}).catch((error) => {
if (isErrorWithCode(error)) {
switch (error.code) {
case statusCodes.SIGN_IN_CANCELLED:
// user cancelled the login flow
Alert.alert("User cancelled the login flow. Please try again.");
break;
case statusCodes.IN_PROGRESS:
// operation (eg. sign in) already in progress
Alert.alert("Sign In already in progress. Please wait.");
break;
case statusCodes.PLAY_SERVICES_NOT_AVAILABLE:
// play services not available or outdated
Alert.alert("Play services not available or outdated. Please update your play services.");
break;
default:
// some other error happened
Alert.alert("An unknown error occurred. Please try again later.");
}
} else {
// an error that's not related to google sign in occurred
Alert.alert("An error that's not related to google sign in occurred. Please try again later.");
}
})}>
<Text>{buttonTitle}</Text>
</Pressable>
)
}
```
The step 4, let's divide it into smaller parts:
- Implement `signOut` using `auth`
- implement a `renderLogoutView` to implement logout.
- Main screen `Components` that include login and logout buttons
```
// 4a.Implement `signOut` using `auth`
// src/api/FirebaseAuthUtils.ts
import auth from '@react-native-firebase/auth';
export function userLogout(): Promise<string> {
return new Promise((resolve, reject) => {
auth()
.signOut()
.then(() => {
resolve('Logout Successful');
})
.catch(error => {
reject({
title: 'Error',
desc: error.message,
});
});
});
}
```
Created a new file in `src/api/FirebaseAuthUtils.ts` and added a logout function.
Everything below is in `Login.tsx`
```
// 4b. Implement a `renderLogoutView` to implement logout.
import { userLogout } from "../api/FirebaseAuthUtils";
//... other imports
const renderLogoutView = () => {
if (user) {
return (
<Pressable onPress={() => {
userLogout().then((message) => {
Alert.alert(message);
}).catch(error => {
Alert.alert(error.title, error.desc);
});
}}>
<Text style={styles.buttonTitle}>Logout</Text>
</Pressable>
)
}
}
```
```
// 4c. Main screen `Components` that include login and logout buttons
return (
<ScrollView>
{!user && <>
<Text style={styles.descriptionText}>
New or returning user, press{'\n'}
<Text style={styles.boldText}>Continue with Google
</Text> to continue
</Text>
{renderGoogleSigninButton()}
</>}
{renderLogoutView()}
</ScrollView>
)
```
That's all the code that is needed. Next let's test it.
### Testing
I tested on simulator and device, it works.
I am not logged in, so it shows the Login button:
I am logged in, so it shows the Logout button:
It'll take user to Google Sign In page for verification.
Logout test and it works as expected.
### Errors
If you're getting this error:
```
LOG ERROR: [Error: DEVELOPER_ERROR]
LOG ERROR: 10 DEVELOPER_ERROR
```
Add the **SHA-1** and **SHA-256**. If you only have `debug` build then just add for that otherwise add total 4; 2 for `debug` and 2 for `release`:
Below is the command you can run to get all the available SHA fingerprints:
```
cd android && ./gradlew signingReport
```
Scroll down to find `> Task :app:signingReport`. Here you can find all the available SHA fingerprints. I only have `debug` so for me `release` and `debug` keys are the same, so in the above screenshot you see only two SHA fingerprints.
This solves the `10 DEVELOPER_ERROR`.
---
If you're getting:
```
[Error: SIGN_IN_REQUIRED]
```
Make sure that your `signOut` is properly configured. Try deleting the app and installing again.
| thechaudhrysab |
1,887,599 | Leveling Up My Frontend Skills: A Journey Through the Jungle of Modern Development | Hi everyone! I’m diving back into frontend development and wow, things have changed! It feels like... | 0 | 2024-06-13T19:13:19 | https://dev.to/thomasheideman/leveling-up-my-frontend-skills-a-journey-through-the-jungle-of-modern-development-k62 | Hi everyone!
I’m diving back into frontend development and wow, things have changed! It feels like every time I turn around, there’s a new framework, library, or technique to learn.
Throughout my career, I’ve been a bit of a jack-of-all-trades. I’ve worked in graphic and web design, built WordPress sites, embraced old-school frontend techniques, got involved with online marketing a bit, became design engineer and worked on UX. I even got certified as product owner along the way. But now, I’m aiming to zero in on getting back in the field as a developer.
While I’m excited to upgrade my skills, the sheer volume of choices is overwhelming. Do I focus on React, Angular, or Vue? Should I master TypeScript or stick with JavaScript? And how does AI fit into all of this?
On top of that, imposter syndrome is real for me. I've been wondering if I should enroll in some form of official education since I never got a degree. This lack of formal credentials feeds into my self-doubt, despite my substantial experience in the field. Should I go back to school, or would following online courses and tutorials be enough to stay current and boost my confidence.
Balancing all these paths and overcoming self-doubt is tough, but I’m taking it one step at a time, trying to stay focused on my goals. Any tips or resources you recommend for navigating this landscape? Let’s share the journey!
#FrontendDevelopment #CodingJourney #WebDev #ImposterSyndrome
| thomasheideman | |
1,887,588 | Computer Science challenge, let's make it interesting!! | If you haven’t checked it out yet, dev.to has introduced First Computer Science Challenge in honor of... | 0 | 2024-06-13T19:11:32 | https://dev.to/sauravshah31/computer-science-challenge-lets-make-it-interesting-lai | computerscience, discuss, softwareengineering, learning | If you haven’t checked it out yet, [dev.to](https://dev.to) has introduced [First Computer Science Challenge](https://dev.to/devteam/introducing-our-first-computer-science-challenge-hp2) in honor of [Alan Turing](https://en.wikipedia.org/wiki/Alan_Turi.ng). The challenge is to explain a computer science concept in 256 characters or less.
Let's make it even more exciting!
It's really interesting to look at these videos where an expert explains a concept at five levels of difficulty.
{% embed https://www.youtube.com/watch?v=fOGdb1CTu5c %}
Let's do the same thing in this challenge too\. [As per the challenge rules](https://dev.to/challenges/cs), it is allowed to "submit multiple submissions per prompt but you’ll need to publish a separate post for each submission".
Why not submit 5 submissions, for explanations at 5 levels of difficulty? It's fun. And to make it more interesting, let's pitch our explanations to people with varying levels of expertise and see how they interpret and re-explain our explanations. We'll then submit their interpretations in 256 characters or less.
To start with, I explained [how to use Lock in Google App Script](https://dev.to/sauravshah31/using-google-apps-script-create-a-todo-web-app-4cah#using-lock-service). Here’s my attempt to explain "Lock / Mutex" at five different levels of difficulty:
## **Level 1:**
- **My Explanation**
Imagine you're in an exam hall where only one student can go to the restroom at a time using a pass. When they return, the pass goes to the next student. Similarly, computers use locks to let only one app access a resource at a time while others wait.
- **People's Interpretation**
_(will update)_
## **Level 2:**
- **My Explanation**
Locks prevent issues when multiple entities access a resource simultaneously (like multiple apps writing to a file), which can cause unexpected behavior (like overwritten writes). Google Docs uses it to avoid overwritten edits during collaboration.
- **People's Interpretation**
_(will update)_
## **Level 3:**
- **My Explanation**
A mutex blocks access to a critical section until the current thread is done, preventing race conditions but potentially causing performance hits. The GIL in CPython restricts access to shared resources to one thread at a time, impacting multi-threading.
- **People's Interpretation**
_(will update)_
## **Level 4:**
- **My Explanation**
A mutex uses architecture-specific atomic instructions (uninterruptible) until successful, allowing thread access to a critical section. For non-atomic architectures, complex logic involving disabling interrupts and continuously checking flags is used.
- **People's Interpretation**
_(will update)_
## **Level 5:**
- **My Explanation**
Damn! I’m not a mutex maestro, and I’ve dug through every corner of my brain and read more articles than a bored cat on the internet. But guess what? I still can't explain mutexes to an expert without turning into one myself.
One day, this section will be so expertly explained it’ll make your head spin!
Any experts here? Drop your wisdom in the comments, and I'll update this section.
- **People's Interpretation**
_(will update)_
Now, my challenge is to present this to individuals at these five levels and share their takes on it. I'll update with the most relevant responses as I receive them.
Join me in this challenge! If you have a better explanation, comment below. Or, explain the concept to those around you and share their interpretations. I will include the top three dev handles with most appropriate response in my submission (you can work on teams of up to four people).
Or, go ahead and participate on your own. Explain any computer science topic in 256 characters or less. Remember, [no plagiarism](https://dev.to/challenges/cs).
>
By the way, I still have some buddy passes to [nights and weekends s5](https://dev.to/sauravshah31/this-is-for-you-lets-build-some-cool-stuff-15kn). [Click on this invitation link](https://sage.buildspace.so/buddy/saurav-rNlBvQC) and you will be directly accepted to the s5 cohort. First kick off starts on 15th June. Let’s build something amazing together!
**Cheers🎉** ~ [sauravshah31](https://x.com/sauravshah31)
| sauravshah31 |
1,887,598 | Blockchain 256 chars | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-13T19:11:09 | https://dev.to/fmalk/blockchain-256-chars-4e9e | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
A blockchain is a series of transactions registered as blocks one after the other, like a chain. Each new block can be traced to the previous block and mathematically demonstrated to be legitimate; it can be distributed and considered untampered when read. | fmalk |
1,887,596 | Top 5 Enhancements in ECMAScript 2024 (ES15) | JavaScript continues to evolve, and the latest version, ECMAScript 2024 (ES15), brings a host of new... | 0 | 2024-06-13T19:04:52 | https://dev.to/vrutikapremani/top-5-enhancements-in-ecmascript-2024-es15-2j9i | JavaScript continues to evolve, and the latest version, ECMAScript 2024 (ES15), brings a host of new features and enhancements. These updates aim to improve the language’s functionality, performance, and developer experience. In this article, we’ll explore the top five enhancements in ES15, complete with code samples to illustrate their practical applications.
1. Array Grouping by groupBy and groupByToMap
ES15 introduces Array.prototype.groupBy and Array.prototype.groupByToMap, which allow you to group array elements based on a criterion provided by a callback function. This feature simplifies the process of categorizing and organizing data within arrays.
Example:
const animals = [
{ name: 'Lion', type: 'Mammal' },
{ name: 'Shark', type: 'Fish' },
{ name: 'Eagle', type: 'Bird' },
{ name: 'Whale', type: 'Mammal' },
];
const groupedByType = animals.groupBy(animal => animal.type);
console.log(groupedByType);
/*
{
Mammal: [{ name: 'Lion', type: 'Mammal' }, { name: 'Whale', type: 'Mammal' }],
Fish: [{ name: 'Shark', type: 'Fish' }],
Bird: [{ name: 'Eagle', type: 'Bird' }]
}
*/
const groupedByTypeMap = animals.groupByToMap(animal => animal.type);
console.log(groupedByTypeMap);
/*
Map {
'Mammal' => [{ name: 'Lion', type: 'Mammal' }, { name: 'Whale', type: 'Mammal' }],
'Fish' => [{ name: 'Shark', type: 'Fish' }],
'Bird' => [{ name: 'Eagle', type: 'Bird' }]
}
*/
These methods enhance the readability and manageability of your code when working with grouped data.
2. Temporal API for Date and Time Handling
The new Temporal API provides a modern and comprehensive way to handle dates and times in JavaScript, addressing many of the issues found in the existing Date object.
Example:
const now = Temporal.Now.plainDateTimeISO();
console.log(now.toString()); // 2024-06-13T12:34:56
const birthday = Temporal.PlainDate.from('2000-01-01');
const age = now.since(birthday);
console.log(`You are ${age.years} years old.`); // You are 24 years old.
The Temporal API offers precise and flexible date and time manipulations, making it a valuable addition for developers dealing with internationalization and time zones.
3. RegExp Match Indices
RegExp match indices (d flag) provide start and end positions of matched substrings, enhancing the capability of regular expressions to return more detailed information.
Example:
const regex = /(foo)/d;
const str = 'foo bar foo';
const match = regex.exec(str);
console.log(match.indices);
/*
[
[0, 3], // for the full match 'foo'
[0, 3] // for the group '(foo)'
]
*/
This feature allows developers to extract and manipulate substrings more effectively by providing precise match indices.
4. Enhanced Error Cause
The enhanced error cause feature allows you to specify a cause when throwing an error. This provides better context for error handling and debugging by linking related errors together.
Example:
try {
try {
throw new Error('Original error');
} catch (err) {
throw new Error('Enhanced error', { cause: err });
}
} catch (err) {
console.error(err.message); // Enhanced error
console.error(err.cause.message); // Original error
}
This feature improves error handling by maintaining a chain of errors, making it easier to diagnose and resolve issues in complex applications.
5. Symbol.prototype.description
The description property on Symbol.prototype provides a way to access the optional description of a symbol directly, enhancing the introspection capabilities of symbols.
Example:
const sym = Symbol('mySymbol');
console.log(sym.description); // 'mySymbol'
This small but useful feature makes it easier to work with symbols by allowing direct access to their descriptions, improving code readability and debugging.
Conclusion
ECMAScript 2024 (ES15) introduces several powerful features that enhance JavaScript’s functionality and usability. The new array grouping methods, Temporal API, RegExp match indices, enhanced error cause, and symbol descriptions collectively contribute to a more robust and developer-friendly language. These enhancements simplify common tasks, improve code readability, and offer more control over complex operations, ensuring JavaScript remains a versatile and modern programming language. Stay updated with these new features to leverage the full potential of ES15 in your projects.`` | vrutikapremani | |
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1,887,593 | How Much Does Dental SEO Cost? | In today's digital world, it's important for dentists to have a strong online presence. SEO (search... | 0 | 2024-06-13T19:00:32 | https://dev.to/hasnain_alam12345/how-much-does-dental-seo-cost-13kl | seo, cost, dental, howmuch | In today's digital world, it's important for dentists to have a strong online presence. SEO (search engine optimization) helps people find your dental practice when they search online. This guide will explain what affects the cost of dental SEO and what you can expect to pay.
## **What is Dental SEO?**
Dental SEO improves your dental practice's website so it ranks higher in search results. This means more people will see your website when they search for dentists in your area. Here are some key parts of dental SEO:
* **Keyword research:** Finding the words people use to search for dentists.
* **On-page SEO:** Making changes to your website to rank higher for those keywords.
* **Off-page SEO:** Building backlinks to your website from other websites. Backlinks are like votes of trust that tell search engines your website is important.
## **What Affects the Cost of Dental SEO?**
Several things can affect how much you pay for dental SEO:
* **Services offered:** Basic packages may only include keyword research and on-page SEO, while more expensive ones may include content creation and backlink building.
* **Experience:** More experienced SEO companies may charge more, but they may also get you better results.
* **Location:** SEO costs more in big cities than in small towns.
* **Competition:** It costs more to rank for keywords that many other dentists are trying to rank for.
* **Website condition:** If your website needs a lot of work, it will cost more to get it ranking well.
* **Payment options:** Some companies charge a monthly fee, while others charge for one-time projects. Monthly fees often provide better long-term results.
## **How Much Does Dental SEO Cost?**
The cost of dental SEO can vary depending on the factors above. Here's a general idea:
* Basic packages: $200 to $600 per month
* Mid-tier packages: $700 to $1,000 per month
* Comprehensive packages: $1,000 to $2,500+ per month
**Is Dental SEO Worth It?**
Dental SEO can be a great investment for your dental practice. It can help you get more new patients and grow your business. When thinking about cost, consider how much a new patient is worth to your practice. Even a small increase in new patients from SEO can make SEO a worthwhile investment.
**Conclusion**
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1,887,591 | Don't refactor the code | This is a piece of advice someone gave me a long time ago. Unfortunately, I don't really remember... | 0 | 2024-06-13T18:52:10 | https://dev.to/katafrakt/dont-refactor-the-code-igk | programming, communication, softwaredevelopment, codequality | This is a piece of advice someone gave me a long time ago. Unfortunately, I don't really remember who, so I cannot properly attribute (although chances are they heard it somewhere too). But I decided to re-share this.
**What is refactoring?** I'm sure we can find multitude of definitions. But with modern software development process it often becomes synonymous with any kind of code changes that do not add, modify or remove features. In other words, a non-product work. In effect it often becomes a blurry term and cause of tension between product stakeholders and the dev team.
Who among us did not hear that on a status meeting: "Yesterday I spent most time refactoring the code around X"? I know I did. No less, I probably said a phrase like that more than once. What does this mean? What did you really do? This is hidden behind "I refactored" term. "I did an important technical work you would not understand" is another way of framing that.
And this is exactly the problem with "refactoring the code". In many cases it means doing a really important work, but it's indistinguishable from almost-slacking-off, like renaming variables for no apparent reason.
And this is what I mean by "don't refactor the code": use different words when talking about things you did, are doing or plan to do. Don't "refactor". Instead try these:
- I made the code more performant (identified N+1, found inefficient processing of a large amount of data)
- I made the code more open to change (mostly should be justified by prediction that we will be changing this area more often now)
- I made the code more defensive (failing early and with a clear message if run with incorrect arguments - because other teams are using it incorrectly and it leads to a subtle bugs)
- I added the tests for an untested area (good rationale: because it failed few times recently; bad rationale: to increase our arbitrary code coverage metrics)
- I added more logging / instrumentation (so we can understand better what is going on)
- I change the code to meet our new style guide (because we will change it often)
Communicating like this is not only makes it easier for others to understand what was changed, but also helps you decide if the change you plan to make really makes a difference. Not being able to hide behind an umbrella "refactoring" term also helps to keep the changes more focused and easier to review for your colleagues. | katafrakt |
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1,886,308 | Database per Service as a Design Pattern | In the world of modern software development, the microservices architecture has emerged as a popular... | 0 | 2024-06-13T18:46:55 | https://dev.to/eugene-zimin/database-per-service-as-a-design-pattern-44gi | microservices, cloud, database, architecture | In the world of modern software development, the microservices architecture has emerged as a popular approach to building scalable and maintainable applications. This architecture breaks down a monolithic application into smaller, independent services that can be developed, deployed, and scaled independently.
However, if there are multiple approaches to perform the decomposition of the service functionality, it is still questionable how to split the data and whether it is necessary at all. This brings us to the heart of the Database per Service pattern and its role in the modern architecture.
## A Bit of History
The journey of software architecture and data management is one of evolving complexity and increasing distribution. To understand where we are today with patterns like Database per Service, it's illuminating to trace the path that led us here. This journey begins with traditional monolithic architectures, where applications were built as single, tightly-integrated units sharing a common database.
### Traditional Monolithic Architecture
Before diving deeper into this design pattern, it's important to understand the traditional approach and why the problem arose.
In the epoch of monolithic applications, there were no such problems with how to access data, because there was no definition of concurrent data access from multiple applications. The monolithic architecture, with its single, shared database, provided a straightforward approach to data management. All components of the application had direct access to the entire database, and data consistency was primarily managed through database transactions and locking mechanisms.
_Figure 1. Application - Database communication model_
This simplicity, however, came at a cost. As applications grew in scale and complexity, the limitations of the monolithic approach became increasingly apparent. The tight coupling between application components and the database made it difficult to evolve the data model without impacting the entire system. Schema changes often required coordinated updates across multiple parts of the application, leading to complex deployment processes and potential downtime.
Moreover, the lack of data encapsulation meant that any part of the application could potentially access and modify any data, increasing the risk of unintended side effects and data corruption. This became particularly problematic as teams grew and different groups of developers worked on different features within the same monolith.
The advent of service-oriented architectures and, later, microservices, brought these data access and management challenges into sharp focus. Suddenly, architects and developers were faced with questions that didn't exist in the monolithic world: How do we ensure that each service has access to the data it needs without creating tight coupling? How do we maintain data consistency when transactions span multiple services? How do we scale data access patterns independently for services with different performance requirements?
### N-Layer Architecture
The first attempt to answer this question was the N-layer architecture style. This approach sought to introduce a degree of separation between different concerns within an application or by organizing code into distinct layers, typically presentation, business logic, and data access, or even further - extracting that functionality into separate application. Each layer is supposed to have a specific responsibility and would communicate with adjacent layers through well-defined interfaces.
_Figure 2. Example of layered system with external DAL_
In the context of data management, the N-layer architecture often involved creating a dedicated data access layer (DAL). This layer encapsulated all interactions with the database, providing a set of methods or services that the business logic layer could use to retrieve or manipulate data. The idea was to abstract away the complexities of data storage and retrieval, making it easier to change the underlying database technology or structure without impacting the rest of the application.
While the N-layer architecture brought some benefits, such as improved code organization and the potential for reusability of data access components, it did not fully address the challenges of distributed systems. The data access layer, though separate, was still typically tightly coupled to a single, shared database. This meant that while individual services or modules might have their own business logic, they were still dependent on a central data store, which could become a bottleneck and a single point of failure.
Moreover, the N-layer approach did not inherently solve issues of data ownership and autonomy. Different services or modules might need to evolve their data models at different rates or have distinct performance and scaling requirements. A shared data access layer and database made it difficult to cater to these diverse needs without complex coordination and potential disruptions.
All these problems lead system and software architects to the next step - creating a design pattern called "Database per service".
### Database per Service
As systems continued to grow in complexity and the need for genuine decoupling became more pressing, architects began to look beyond layered architectures to more distributed patterns. This led to the consideration of approaches like the Database per Service pattern, which takes the concept of separation a step further by giving each service not just its own data access code, but its own dedicated database.
The transition from N-layer architectures to patterns like Database per Service reflects a fundamental shift in thinking about data management in distributed systems. Rather than seeing data access as a shared concern to be abstracted away, modern approaches often treat data as an integral part of each service's domain, to be owned and managed as autonomously as possible.
_Figure 3. Database per Service Design Pattern in Action_
This evolution, however, is not without its challenges. While the N-layer architecture grappled with issues of code organization and reusability, Database per Service patterns must contend with questions of data consistency, duplication, and inter-service communication. The decoupling of data stores provides greater flexibility and resilience, but it also requires careful consideration of how to maintain a coherent view of data across the system.
As we continue to explore the Database per Service pattern, we'll see how it builds upon the lessons learned from earlier architectural styles like N-layer, while introducing new paradigms that are better suited to the realities of modern, distributed applications. The goal remains the same: to create systems that are scalable, maintainable, and responsive to change. But the means of achieving this goal have evolved, reflecting the ever-increasing complexity and scale of the software we build.
## Benefits of the Database per Service Pattern
We need to understand that Database per Service pattern is not a silver bullet. However, even introducing its own set of challenges, it offers several compelling benefits that have made it an increasingly popular choice in microservices architectures. These advantages stem from the fundamental principle of decoupling, not just at the application level, but at the data level as well.
### Enhanced Scalability
One of the primary drivers behind the adoption of microservices, and by extension the Database per Service pattern, is scalability. Consider 2 different examples, where the first one is a traditional monolithic application with a shared database.
_Figure 4. Loading Map Inside Monolith Application_
With this approach scaling often means scaling the entire system, even if only one component is under heavy load. This can lead to inefficient resource utilization and increased costs. Let's count it up.
Imagine that our application runs on a VM with 4 CPU and 16Gb of RAM. That's a simple web application, providing functionality for storing and reading messages by different users based on their subscriptions, like in Twitter. Application, being built as a monolith one, is able to consume no more than 25% resources of the VM to leave some room for scaling and operational overhead.
Now, for the sake of simplicity let's imagine that each of the component consumes about 300Mb of RAM and about 100Mb of RAM is integration overhead for the monolith. In this case we notice that our application is lack of resources and we would like to create another instance. Would it be a good idea? No. Do we have a choice? No.
_Figure 5. Scaling Monolith Application_
Creating another instance of the whole application, we have to scale all components, sitting inside it, even those ones, which are totally not under high load, because we can't differentiate them. Eventually it will lead us to the state where we will have 2 applications with redundant functionality, consuming memory and CPU, which cost us money.
_Figure 6. Scaling Microservice Application_
With a database per service, each service and its corresponding database can be scaled independently based on its specific demands. A service handling creating messages and reading them, for instance, might need to scale to handle a high volume of requests, while an user registration might not require scaling at all. By allowing each service to scale its own database, we can fine-tune their infrastructure, allocating resources where they're most needed and optimizing performance without unnecessary overhead.
### Cleaner Data Ownership
In large systems, it can sometimes be unclear which part of the application "owns" particular data, leading to confusion, inconsistencies, or unintended side effects when data is modified. The Database per Service pattern establishes clear boundaries of data ownership.
Imagine the scenario with the messaging application.
_Figure 7. Data Ownership in Messaging Application_
Adopting a Data-Driven Design approach, we can identify two primary services with distinct data responsibilities: the User Management Service and the Messaging Service. When examining the data model for the Messaging Service, it's evident that each message must include information about its author—a user registered within the User Management Service.
A simplistic solution might involve replicating user and role data within the Messaging Database, which is directly linked to the Messaging Service. The rationale seems straightforward: every time a message is created and persisted, we need to authenticate the user and verify their permissions for message production and storage.
However, duplicating user and role information in the Messaging Database would result in the `User` and `Roles` tables existing concurrently in two separate databases. If we consider the User Management Database as the authoritative source for user-related data, we introduce a data synchronization challenge—ensuring that information remains consistent across both locations. This scenario effectively violates the Single Responsibility Principle from the S.O.L.I.D. pattern. The Messaging Database would now require updates not only when message data changes but also when user information is modified, conflating its responsibilities.
Such an arrangement complicates data ownership and management. Ideally, each service should have clear authority over its domain-specific data, with well-defined boundaries that promote maintainability and reduce interdependencies. Duplicating user data within the Messaging Service blurs these lines, creating potential for data inconsistencies and increasing the complexity of system-wide updates.
A more robust approach would respect the natural boundaries between services, allowing the User Management Service to retain sole ownership of user-related data. Rather than replicating this information, the Messaging Service would reference it as needed, storing only links or pointers, while relying on the User Management Service for authoritative data. This strategy upholds the principles of service autonomy and data integrity, cornerstones of effective microservices architecture.
_Figure 8. Correct Data Ownership_
Now each service becomes the sole writer to its database and the authoritative source for its domain of data. This clarity reduces complexity in data management, helps maintain data integrity, and makes it easier to reason about the system's behavior. While services may still need to share data, this is typically done through well-defined APIs rather than direct database access or redundant data, reinforcing the principles of encapsulation and loose coupling.
### Improved Fault Isolation
In a system with a shared database, issues like outages, performance degradation, or data corruption can have wide-ranging impacts, potentially bringing down the entire application. The Database per Service pattern provides a higher degree of fault isolation.
If one service's database experiences problems, the impact is largely contained to that service. Other parts of the system can continue to function, improving overall resilience. This isolation also simplifies troubleshooting and recovery, as teams can focus on addressing issues within a specific service and its database without needing to coordinate across the entire system.
Let's take a look at the example. We will use the same Messaging application and now consider the worst-case situation: the application relies on a shared database, and this database suddenly becomes unavailable.
_Figure 9. Database/DAL failure_
The consequences of this failure are immediate and far-reaching. With the database inaccessible, the entire service effectively grinds to a halt in terms of its core functionality. No component within the system can retrieve or manipulate data, rendering the application useless from an end-user perspective.
This outage isn't merely an inconvenience; it represents a single point of failure that can paralyze operations across the board. User authentication may fail without access to account data. The messaging feature, the heart of the application, cannot display existing conversations or allow the sending of new messages. Even secondary functions like user settings or search capabilities are compromised.
The ripple effects extend beyond just data retrieval. Write operations—such as storing new messages, updating user profiles, or logging system activities—also come to a standstill. This not only disrupts current user interactions but can lead to data loss if the system isn't designed with robust queueing and retry mechanisms.
Furthermore, the shared nature of the database means that even services or components with minimal data needs are impacted. A status monitoring tool that might normally operate with cached data could fail if it periodically needs to check in with the database. Administrative interfaces, often crucial for diagnosing and addressing issues, may themselves be rendered inoperable.
This scenario underscores one of the fundamental vulnerabilities of a monolithic architecture with a shared database: lack of isolation. When all services depend on the same data store, they share the same fate when that store fails. There's no graceful degradation, no ability for some parts of the system to continue functioning while others are impaired.
_Figure 10. Database failure in distributed system_
Now let's reimagine the same scenario, but within the context of a system employing the Database per Service pattern. When a database failure occurs, its impact is largely contained to the service directly connected to it, leaving other services unaffected and operational.
In this illustration, we see that the database linked to the Commenting service has gone offline. The immediate consequence is that the Commenting service loses its ability to retrieve or store data. Users might encounter error messages when trying to post new comments or view existing ones. However—and this is the critical difference—the ripple effect stops there.
The User Management service, with its own dedicated database, continues to authenticate users and manage account information unimpeded. The Messaging service still facilitates the exchange of direct messages between users. Even a hypothetical Analytics service could keep tracking user engagement metrics, perhaps with a temporary blind spot for comment-related events.
This resilience stems from the decoupling inherent in the Database per Service pattern. Each service not only has its own codebase and deployment pipeline but also its own data persistence layer. This autonomy means that a failure in one part of the system doesn't automatically cascade into a system-wide outage. Instead, the application gracefully degrades, maintaining core functionalities even as some features become temporarily unavailable.
Of course, in a well-designed microservices architecture, services rarely exist in total isolation. They often depend on each other for certain functionalities. In our example, the Messaging or User Management services might need to interact with each other -to perform users authentication and authorization, so the failure of any core services might still be critical to the overall functionality, however the rest of the services have to analyze the error response and notify customers together with system administrators about failure. Moreover, they can also narrow down the issue failure point, which makes debugging easier.
Services should be built to handle errors or timeouts from their dependencies gracefully. If the Messaging service tries to fetch recent comments for a conversation and receives an error response from the Commenting service, it shouldn't crash. Instead, it might display a message to the user that comments are temporarily unavailable, while still showing the rest of the conversation history. Similarly, the User Management service could queue moderation actions to be processed once the Commenting service is back online, rather than blocking user management tasks.
### Greater Development Autonomy
One of the challenges in large software projects is coordinating changes, especially when it comes to the database schema. In a shared database, a schema change for one part of the application might require updates and testing across many components, slowing down development cycles as it has direct impact on the whole components.
By giving each service its own database, development teams gain more autonomy. They can evolve their service's data model, optimize queries, or even change database technologies without impacting other services. This autonomy can significantly speed up development and deployment cycles, allowing teams to work more independently and deliver value more quickly.
_Figure 11. Access data through API only_
This diagram illustrates a fundamental tenet of the Database per Service pattern: data encapsulation through well-defined APIs. Here, we see that any modifications to the Messaging Database's model have a direct impact solely on the Messaging Service. The changes remain invisible to other components within the broader system ecosystem. This encapsulation is achieved by adhering to a strict rule: all data access must flow through the service's API.
The power of this approach becomes evident when we consider the implications for schema evolution. Let's say the team responsible for the Messaging Service decides to denormalize their data model to improve query performance, perhaps by embedding frequently accessed user information directly within message records. In a shared database scenario, such a change could wreak havoc, breaking queries and data access patterns across multiple services. However, with the Database per Service pattern, the change is contained. As long as the Messaging Service continues to honor its API contract—returning the expected data structures and fields—other services remain blissfully unaware of the underlying data reshuffling.
This principle dovetails neatly with the Open-Closed Principle from S.O.L.I.D., which states that software entities should be open for extension but closed for modification. In our context, the Messaging Service's API represents the "closed" part—a stable interface that other services can rely upon. When new requirements emerge or optimizations are needed, the service can "extend" its capabilities by evolving its internal data model or adding new API endpoints, without disrupting existing consumers.
For instance, if there's a need to support richer metadata for messages, the Messaging Service team might add new fields to their database schema and expose this additional information through new API methods or optional parameters on existing methods. Services that don't need this metadata continue to function unperturbed, while those that do can opt-in to the enhanced functionality.
The benefits of this approach extend beyond just ease of change. By forcing all data access through a versioned API, we introduce a layer of abstraction that can smooth over differences between the service's internal data representation and the view of that data presented to the outside world. This can be particularly valuable during incremental migrations or when supporting legacy clients.
Consider a scenario where the Messaging Service is transitioning from storing timestamps as Unix epochs to ISO 8601 strings. Rather than forcing all consumers to adapt simultaneously—a herculean task in large systems—the service's API can continue to accept and return epochs for v1 of the API, while offering the new format in v2. Internally, the service handles the conversion, allowing for a phased migration that doesn't leave any part of the system behind.
### Flexible Technology Choices
This benefit is a direct outgrowth of two fundamental patterns: separate data ownership and encapsulation. When data is tucked behind a well-defined API contract, the specifics of the underlying storage mechanism become an implementation detail—opaque and, to a large extent, irrelevant to consumers of that API. Does it matter to the rest of the system whether the Messaging Service persists its data in MySQL, PostgreSQL, or ventures into NoSQL territory with MongoDB? As long as the service honors its API commitments, the answer is a resounding no.
This abstraction opens up a world of possibilities, freeing teams from the "one size fits all" straitjacket often imposed by a shared, monolithic database. In reality, not all data is created equal, and the notion that a single database technology can optimally serve every type of data or access pattern across a complex system is increasingly recognized as a constraining myth.
The Database per Service pattern shatters this constraint, ushering in an era of polyglot persistence—where each service can select a database technology that aligns precisely with its unique data characteristics and operational demands. This isn't just about having choices for the sake of variety; it's about empowering teams to make nuanced, strategic decisions that can significantly impact performance, scalability, and even the fundamental way they model their domain.
The implications of this technological flexibility ripple beyond just query performance or data model fit. Different database technologies bring different operational characteristics—scaling models, backup and recovery procedures, monitoring and management tools. By aligning these with service-specific needs, teams can optimize not just for runtime performance but for the entire lifecycle of managing data in production.
### Easier Maintenance and Updates
This capacity for streamlined maintenance and evolution is yet another dividend paid by the twin principles of separate data ownership and encapsulation within the Database per Service pattern. In a landscape where data stores are siloed and accessible only through well-defined service interfaces, routine database upkeep and even transformative changes can be orchestrated with surgical precision, minimizing system-wide disruption.
Consider the cyclic necessities of database maintenance—software updates to patch security vulnerabilities, backup procedures to safeguard against data loss, or performance optimizations to keep pace with growing loads. In a monolithic architecture with a shared database, each of these tasks casts a long shadow. A version upgrade might require extensive regression testing across all application components. A backup process could impose a system-wide performance penalty. An ill-conceived index might accelerate queries for one module while grinding another's write operations to a halt.
The Database per Service pattern redraws these boundaries of impact. When each service lays claim to its own database, maintenance windows can be staggered, tailored to the specific needs and tolerances of individual services. The Customer Support team might schedule their database patching for the wee hours of Sunday morning when ticket volume is lowest, while the E-commerce platform waits until Tuesday afternoon post-sales rush. Backups for a write-heavy Logging Service could run hourly, while a relatively static Product Catalog Service might only need daily snapshots.
This granularity extends to performance tuning. DBAs can optimize with abandon, knowing that an experimental indexing strategy or a shift in isolation levels will reverberate only within the confines of a single service. The blast radius of any potential misstep is contained, fostering an environment where teams can be bolder in pursuing optimizations that might be deemed too risky in a shared-database context.
But the true power of this pattern shines through when we zoom out from day-to-day maintenance to consider more seismic shifts in data architecture. In the life of any sufficiently long-lived system, there comes a time when incremental tweaks no longer suffice—when data models need comprehensive restructuring, or when the limitations of the current database technology become insurmountable barriers to growth or feature development.
Traditionally, such changes have been the stuff of CTO nightmares: "big bang" migrations where months of preparation culminate in a high-stakes cutover weekend, with the entire engineering team on high alert and business stakeholders watching the status dashboard with bated breath. The risks are manifold—data corruption, performance regressions, or the dreaded Monday morning realization that a critical legacy feature was overlooked in testing. Rollback plans for such migrations often boil down to "pray we don't need it," because reversing course once the switch is flipped can be nearly impossible.
## Conclusion
As we draw our exploration of the Database per Service pattern to a close, it's clear that this architectural approach offers a compelling vision for data management in the age of microservices. By championing separate data ownership, encapsulation, and the autonomy of individual services, the pattern unlocks a cascade of benefits that ripple through every facet of system development and operation.
We've seen how this decoupling can accelerate development cycles, freeing teams to evolve their data models and optimize performance without fear of collateral damage. We've explored the flexibility it affords in choosing the right database for the job, eschewing one-size-fits-all solutions in favor of technologies tailored to each service's unique needs. And we've witnessed how it transforms maintenance and migration from high-wire acts to managed, incremental processes, reducing risk and increasing the system's capacity for change.
These advantages paint a picture of systems that are not just more scalable and resilient, but more adaptable—better equipped to keep pace with the relentless evolution of business requirements, user expectations, and technological capabilities. In a digital landscape where agility is currency, the ability to pivot quickly, to experiment boldly, and to embrace change without fear can spell the difference between market leaders and those left behind.
Yet, as with any architectural choice, the Database per Service pattern is not without its complexities and trade-offs. The very decoupling that grants such flexibility also introduces new challenges around data consistency, distributed transactions, and holistic data views. The autonomy that empowers individual teams can, if not carefully managed, lead to a fragmented technology landscape that strains operational resources. And while service interfaces provide a powerful abstraction, designing them to be both flexible and stable requires foresight and discipline.
These challenges are not insurmountable, but they do demand thoughtful strategies and sometimes novel solutions. In our next article, we'll pull back the curtain on the potential drawbacks of the Database per Service pattern. We'll confront head-on the questions of how to maintain data integrity across service boundaries, how to handle workflows that span multiple data stores, and how to balance service independence with the need for system-wide governance.
We'll also examine the organizational and operational implications of this pattern. What does it take to successfully manage a polyglot persistence environment? How do we ensure that our decentralized data doesn't become siloed data, invisible to the analytics and insights that drive business decisions? And how might this pattern influence—or be influenced by—emerging trends like serverless architectures, edge computing, or AI-driven operations?
By exploring these drawbacks and challenges, our aim is not to diminish the power of the Database per Service pattern, but to equip us with a complete picture—to ensure that our journey toward decentralized data ownership is undertaken with eyes wide open. After all, true architectural wisdom lies not in dogmatic adherence to any pattern, but in understanding deeply both its strengths and its limitations.
So consider this not an ending, but an intermission. We've celebrated the elegance and potential of a world where each service is master of its own data domain. When next we meet, we'll roll up our sleeves and dig into the gritty realities of bringing that vision to life—the obstacles to be navigated, the pitfalls to be sidestepped, and the trade-offs to be weighed.
The path to robust, evolvable systems is seldom straightforward. But armed with patterns like Database per Service—and a clear-eyed view of both their power and their demands—we can chart a course through the complexity. So stay tuned, as we prepare to balance today's optimism with pragmatism, and turn our gaze from the heights of possibility to the solid ground of practice. | eugene-zimin |
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1,887,468 | Redux: As a beginner | Hello everyone👋, I am a Junior Front-End Web Developer, and I have decided to document my journey... | 0 | 2024-06-13T18:39:37 | https://dev.to/georgiosdrivas/redux-as-a-beginner-5akb | react, webdev, redux, javascript | Hello everyone👋,
I am a Junior Front-End Web Developer, and I have decided to document my journey learning new technologies in front-end development and beyond.
My first article will be about Redux JS, a state management tool that helps us manage the state of our app. But what exactly is state?
State is defined as an object that stores data or information about a component in ReactJS. Whenever data in the state changes, React will "react" to this change and the component will re-render. In simple terms, state is a box where we store our component's data/properties.
There are many ways to control and manage the state of a component. When a component's size is small, it is easy to control its data using simple built-in hooks like useState. The problem begins when many components need to communicate with each other in different parts of our app.
In these cases, the state is called global because it is not contained in only one component but is useful in many more. To avoid messing up the state, we need a way to control all of these different global boxes📦 (state). That's where Redux comes in handy.
Redux makes it easier to understand when, where, and how the state in your application is being updated, and how your application logic will behave when those changes occur.
Think of it like a warehouse🏭 that powers many different stores🛒 in a town. All of them need products, so when a store (component) needs to restock (update the state), Redux provides patterns and tools to help with the process.
However, be careful. If there are only a limited number of stores, there is no need for the warehouse to exist in the first place. That being said, you should consider using Redux only if it is needed—if the state is getting out of hand with complexity, or many different components need to communicate and use the same state—otherwise, you will make things more difficult than they have to be.
For technical details, you can visit the official documentation for Redux Toolkit (the preferred way to use Redux, with less boilerplate code and easier setup): [Redux Toolkit Documentation](https://redux-toolkit.js.org/introduction/getting-started). | georgiosdrivas |
1,887,586 | Error after upgrade on Ubuntu 24.04 "Oh no! Something went wrong" | Before upgrading on new version BACKUP ALL DATA!!! I upgraded to Ubuntu 24.04 (from Ubuntu 22.04).... | 0 | 2024-06-13T18:39:11 | https://dev.to/justplegend/error-after-upgrade-on-ubuntu-2404-oh-no-something-went-wrong-1840 | upgrade, ubuntu, linux | Before upgrading on new version BACKUP ALL DATA!!!
**I upgraded to Ubuntu 24.04 (from Ubuntu 22.04).**
After rebooting and login on my account I saw white background with message "Oh no! Something went wrong!". I tried to Log out, but it was not successful.
Solutions I read included next steps:
1. Before Log out, press next **CTRL+ALT+F3**. Login with your credentials and password.
2. Execute commands (of your wifi is disabled, then plug-in cable)
sudo apt-get update && sudo apt-get upgrade
sudo dpkg --configure -a
sudo apt-get clean && sudo apt-get autoremove
sudo reboot
If these steps doesn't resolve your problem, then execute these commands. Use again CTRL+ALT+F3
sudo apt --fix-broken install
sudo dpkg --configure -a
sudo apt-get update
sudo reboot
This solution worked for me in error message "Oh no!Something get wrong."
Did you have other errors in upgrading on Ubuntu 24.04? How did you resolved problems?
If this was helpful share it with others to help each other.
| justplegend |
1,887,585 | 2037. Minimum Number of Moves to Seat Everyone | 2037. Minimum Number of Moves to Seat Everyone Easy There are n seats and n students in a room. You... | 27,523 | 2024-06-13T18:38:57 | https://dev.to/mdarifulhaque/2037-minimum-number-of-moves-to-seat-everyone-164a | php, leetcode, algorithms, programming | 2037\. Minimum Number of Moves to Seat Everyone
Easy
There are `n` seats and `n` students in a room. You are given an array `seats` of length `n`, where `seats[i]` is the position of the <code>i<sup>th</sup></code> seat. You are also given the array `students` of length `n`, where `students[j]` is the position of the <code>j<sup>th</sup></code> student.
You may perform the following move any number of times:
- Increase or decrease the position of the <code>i<sup>th</sup></code> student by `1` (i.e., moving the <code>i<sup>th</sup></code> student from position `x` to `x + 1` or `x - 1`)
Return _the **minimum number of moves** required to move each student to a seat such that no two students are in the same seat_.
Note that there may be **multiple** seats or students in the **same** position at the beginning.
**Example 1:**
- **Input:** seats = [3,1,5], students = [2,7,4]
- **Output:** 4
- **Explanation:** The students are moved as follows:
- The first student is moved from from position 2 to position 1 using 1 move.
- The second student is moved from from position 7 to position 5 using 2 moves.
- The third student is moved from from position 4 to position 3 using 1 move.
In total, 1 + 2 + 1 = 4 moves were used.
**Example 2:**
- **Input:** seats = [4,1,5,9], students = [1,3,2,6]
- **Output:** 7
- **Explanation:** The students are moved as follows:
- The first student is not moved.
- The second student is moved from from position 3 to position 4 using 1 move.
- The third student is moved from from position 2 to position 5 using 3 moves.
- The fourth student is moved from from position 6 to position 9 using 3 moves.
In total, 0 + 1 + 3 + 3 = 7 moves were used.
**Example 3:**
- **Input:** seats = [2,2,6,6], students = [1,3,2,6]
- **Output:** [0,1]
- **Explanation:** Note that there are two seats at position 2 and two seats at position 6.
The students are moved as follows:
- The first student is moved from from position 1 to position 2 using 1 move.
- The second student is moved from from position 3 to position 6 using 3 moves.
- The third student is not moved.
- The fourth student is not moved.
In total, 1 + 3 + 0 + 0 = 4 moves were used.
**Constraints:**
- <code>n == seats.length == students.length</code>
- <code>1 <= n <= 100</code>
- <code>1 <= seats[i], students[j] <= 100</code>
**Solution:**
```
class Solution {
/**
* @param Integer[] $seats
* @param Integer[] $students
* @return Integer
*/
function minMovesToSeat($seats, $students) {
$ans = 0;
sort($seats);
sort($students);
for ($i = 0; $i < count($seats); $i++) {
$ans += abs($seats[$i] - $students[$i]);
}
return $ans;
}
}
```
**Contact Links**
- **[LinkedIn](https://www.linkedin.com/in/arifulhaque/)**
- **[GitHub](https://github.com/mah-shamim)**
| mdarifulhaque |
1,887,584 | Project Stage-2 Implementation [part-1] | Welcome to the SPO600 2024 Summer Project Stage-2! This summer, we're diving into the fascinating... | 0 | 2024-06-13T18:38:46 | https://dev.to/yuktimulani/project-stage-2-implementation-part-1-1p4n | functionmultiversioning, aarch64, gcc | Welcome to the SPO600 2024 Summer Project Stage-2! This summer, we're diving into the fascinating world of compiler optimization to build a prototype of Automatic Function Multi-Versioning (AFMV) for the GNU Compiler Collection (GCC) on AArch64 systems. In this blog, we’ll explore the context, for the Stage-2 of our project where we apply FMV to functions automatically, a key component of our project.
## My Task
In this project we were assigned different roles since it is a very big process for every individual alone and we have less time. Imagine trying to understand the huge code base of GCC and then having almost 35 copies of the same project.😵💫
So now lets get to the point which is my task. I was assigned the task of applying FMV cloning to the functions automatically. Description: When the appropriate command-line options are provided, the compiler should automatically clone all functions, as if the target_clone attribute was specified.
Now I know what questions are coming up in your mind , What FMV
cloning actually is? and so on.
I you wanna know then join me for this mini trip of applying FMV cloning.
P.S. it might not be a "MINI" trip though.
## What is Function Multi Versioning?
Function Multi-Versioning (FMV) is an optimization technique used in modern computing to enhance the performance of programs by allowing different versions of a function to be generated and used based on the specific characteristics of the hardware or runtime environment. This approach can lead to more efficient execution by leveraging specialized hardware features or optimizations tailored to specific conditions.
## Key Concepts
1. **Multiple Versions**: FMV involves creating multiple versions of a function, each optimized for different hardware capabilities or runtime scenarios. For example, a function might have one version optimized for CPUs that support a specific set of vector instructions and another version for older CPUs without these features.
2. **Selection Mechanism**: At runtime, the system determines which version of the function to execute based on the current environment. This decision is typically made using a selector function that checks the hardware capabilities or other relevant factors.
3. **Hardware Specialization**: FMV is especially useful for exploiting hardware-specific features like vector extensions (e.g., AVX, SSE on x86 architectures) or specialized instruction sets available on newer processors.
4. **Performance Optimization**: By using the most appropriate version of a function for the given context, FMV can significantly improve performance, particularly in compute-intensive applications such as scientific computing, graphics processing, and machine learning.
5. **Dynamic vs. Static Dispatch:**
-**Static Dispatch**: The selection of the function version
happens at compile time. The compiler generates different
code paths depending on compile-time checks or target
specifications.
-**Dynamic Dispatch**: The function version is selected at
runtime
based on actual hardware detection or other runtime
conditions.
6. **Compiler Support**: Modern compilers, such as GCC and Clang, often provide built-in support for FMV. They allow developers to specify different versions of a function and handle the dispatch logic automatically.
## Benefits of Function Multi-Versioning
- **Improved Performance**
: By using hardware-specific optimizations, FMV can enhance the execution speed of programs.
- **Flexibility**: Programs can adapt to a wide range of hardware configurations without requiring multiple separate binaries.
- **Backward Compatibility**: FMV allows newer code to run on older hardware by providing a version of functions that does not rely on newer, unsupported features.
Now the next critical question arises that how do we do this FMV cloning thing? So, as you know lets discuss this in the next blog 😉
Until then folks... Happy Coding!!!
| yuktimulani |
1,887,583 | Dr. Wasit Prombutr was Honored With the Distinguished Professorship Award By QAHE And AUBSS | In an exciting announcement, the American University of Business and Social Sciences (AUBSS) proudly... | 0 | 2024-06-13T18:37:17 | https://dev.to/aubss_edu/dr-wasit-prombutr-was-honored-with-the-distinguished-professorship-award-by-qahe-and-aubss-3glj | education, aubss, university, news |
In an exciting announcement, the American University of Business and Social Sciences (AUBSS) proudly shares that Dr. Wasit Prombutr has been granted the esteemed Distinguished Professorship Award. This prestigious recognition, jointly presented by AUBSS and the International Association for Quality Assurance in Pre-Tertiary & Higher Education (QAHE), celebrates Dr. Prombutr’s exceptional contributions to education and his remarkable expertise in various fields.
Dr. Wasit Prombutr, a highly respected scholar and academic, has displayed an unwavering commitment to advancing education quality and fostering excellence in teaching and research. With a diverse background spanning multiple disciplines, Dr. Prombutr has made significant impacts in the educational sector, both locally and globally.
The Distinguished Professorship Award stands as a testament to Dr. Prombutr’s outstanding achievements and his unwavering dedication to academic excellence. This prestigious honor is jointly bestowed by AUBSS, a leading institution renowned for its focus on business and social sciences education, and QAHE, a prominent global organization dedicated to upholding educational quality.
Throughout his illustrious career, Dr. Prombutr has amassed extensive knowledge and experience across various academic domains. His educational journey includes a Bachelor’s Degree in Landscape Technology, a Master’s Degree in Regional Planning and Urban Planning, and a Ph.D. in Business Administration with a specialization in Human Resource and Organizational Development.
In addition to his academic qualifications, Dr. Prombutr has pursued numerous professional development opportunities, gaining expertise in areas such as quality management, project analysis, coaching, neuro-linguistic programming, and leadership. His continuous quest for knowledge and his unwavering commitment to personal and professional growth have positioned him as a distinguished scholar and educator.
Dr. Prombutr’s commitment to education transcends conventional classroom boundaries. He has served as a trusted consultant and advisor to various organizations, offering guidance on quality management, business restructuring, and stakeholder-centered coaching. His expertise has been sought after by both public and private sectors, leaving a lasting impact on organizational development and effectiveness.
The Distinguished Professorship Award is a well-deserved recognition of Dr. Prombutr’s remarkable contributions to education and his relentless pursuit of academic excellence. It stands as a testament to his exceptional achievements and serves as an inspiration to educators and scholars worldwide.
AUBSS takes great pride in celebrating Dr. Wasit Prombutr’s exceptional accomplishments and acknowledges his significant contributions to the academic community. The Distinguished Professorship Award signifies his outstanding achievements and serves as a source of motivation for educators and scholars across the globe. | aubss_edu |
1,887,582 | Philly Hibachi private party chef | In the bustling states of New Jersey and Philadelphia, a unique dining experience is sweeping across... | 0 | 2024-06-13T18:33:50 | https://dev.to/hibachi07/philly-hibachi-private-party-chef-gl4 | In the bustling states of New Jersey and Philadelphia, a unique dining experience is sweeping across backyards and home parties. AwesomeHibachi offers an unparalleled hibachi experience, bringing the excitement, flavors, and flair of traditional hibachi cooking right to your doorstep. Whether you're in New Jersey or Philly, AwesomeHibachi ensures a memorable event that combines delicious food with unforgettable entertainment.
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1,887,581 | Memecoin Market Overview: Brett and Gamestop in the Spotlight; Leading Memes Fading Behind | Moving against the market sentiment, Brett (BRETT) and GameStop (GME) marked record... | 0 | 2024-06-13T18:32:08 | https://dev.to/endeo/memecoin-market-overview-brett-and-gamestop-in-the-spotlight-leading-memes-fading-behind-44b6 | webdev, javascript, web3, blockchain | #### Moving against the market sentiment, Brett (BRETT) and GameStop (GME) marked record performance amidst top memes’ stagnation. But are we seeing a positive retest?
As the market has been sluggish in anticipation of FOMC updates, memecoins caught up the tendency and have been showing sharp downticks. Though, not all ‘memes’ followed the tough tendency.
Can Brett’s and GameStop’s upturns serve a silver-lining for the meme-inspired assets? Figuring out below.
## PEPE, DOGE, and SHIB Going South
Pepe (PEPE) – one of the leading ‘memes’ in the cryptomarket – switched the trend since updating its all-time high of $0.000017. For over two weeks, the coin had been trapped in a falling wedge between 0.618 and 0.386 Fibonacci levels, recorded at the prices of $0.000014 and $0.0001215 respectively.
This dynamic marked a 16% weekly regression, with moving average convergence divergence (MACD) indicating downturn at most, and moving averages staying below 0.
Following the 0.386 Fib breakout, Pepe eventually pinned $0.000011 resistance and bounced back, paving its way to $0.000014.
The recovery spurs optimism in the asset, yet not all memes managed to break out of the bearish sentiment.
Shiba Inu (SHIB) has been keeping up its sideways outlook, registering a prevailing selling activity. Trading between $0.000020 and $0.000029 marks, the coin's relative strength index (RSI) reveals the ongoing downward sentiment for the asset.
Same outlook is pictured by the exponential moving averages, with a 20-day EMA hinting at the continuation of a local correction.
Dogecoin (DOGE), the largest memecoin in the market, was not spared from the recent decline as well. While DOGE’s volume slightly increased, analysis indicates that sellers dominated it.
According to the daily chart, Dogecoin’s decline kicked in around June 7, dropping over 7% from $0.16 to $0.148. Within the downturn, price fell below its 50-day moving average (orange line) and took it below the neutral line on its RSI, indicating a bear trend.
The regressive trend is going on, as DOGE remains stuck at the $0.1477 range at the writing time.
Dogecoin’s market capitalisation also showed a significant decline. Data from Coinglass indicated that after the coin’s 7% downturn, its market cap fell below $21 billion.
Seeing that DOGE’s volume has significantly increased in the last 24 hours, it still remains the largest memecoins in the market. Meanwhile, it turned out to be outperformed by newly popular assets – just like the other leading memecoins.
## BRETT and GME Stealing the Show
On June 9, Brett (BRETT), a Base-developed memecoin, managed to achieve its all-time high of $0.1955. A week before reaching the milestone, Brett secured a $1 billion market capitalisation, which elevated it to over $2 billion with ATH.
Being a response to the dominating Solana-based memecoins, Brett remains the most valuable cryptocurrency on Base, while its market cap slightly diminished to $1.61 billion at the writing time.
Despite a slight correction, Brett managed to produce a dramatic 375% upswing in the last 30 days. What is more, the coin’s social dominance keeps spiking, despite a slightly bullish indication in recent days. Weighted Sentiment also reveals a broader bullish perspective on the asset.
The correction seems to be perceived as a buying opportunity, seeing strong buzz around Brett.
This is also proved by the 4-hour chart. According to it, the 0.382 Fibonacci level recorded the $0.12 price, indicating that the one was a nominal pullback. If selling pressure increases, Brett could find support at this specific point.
The Awesome Oscillator (AO) demonstrates a bearish reading. The red histogram bars clearly indicated that the momentum was heading downwards.
AO’s reading correlated with moving average convergence divergence (MACD), which stood below zero at the writing time. What is more, the 12 EMA had crossed below the 26 EMA, supporting a decline.
Ultimately, BRETT’s price might drop to $0.14 or to $0.12, given the Fib levels.
As BRETT’s sellers outpaced its buyers, the identical dynamics is demonstrated by GameStop (GME). The memecoin has increased by over 50% in the last 7 days and noted a staggering 7,962.12% pump in the recent month.
What is more, the Santiment data reveals that Social Dominance is still at a high level, significantly overtaking top memecoin Doge’s Weighted Sentiment.
As per the 4-hour chart, RSI proves that GME is experiencing sellers’ domination. While it hit a local top, the decline could be a sign that, despite the memecoin dominance, the token is at a discount.
The leading memecoins’ price dips is nothing else than an indicator of the selling dominance, which is a logical outcome for the assets that reached their local highs in momentum. | endeo |
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1,887,579 | What is significance of the python virtual environment? Give some examples in support of your answer | The short answer is this: A directory with a particular file structure. It has a bin subdirectory... | 0 | 2024-06-13T18:24:52 | https://dev.to/jayachandran/what-is-significance-of-the-python-virtual-environment-give-some-examples-in-support-of-your-answer-43oo |
The short answer is this:
A directory with a particular file structure. It has a bin subdirectory that includes links to a Python interpreter as well as subdirectories that hold packages installed in the specific (venv). virtual environment’s are Python’s way of separating dependencies between projects. therefore, the Ruby's bundler or Javascript's npm come with its features built in, python package manager pip, does not.
The Python have few common use cases for a virtual environment:
- You’re developing multiple projects that depend on different versions of the same packages, or you have a project that must be isolated from certain packages because of a namespace collision. This is the most standard use case.
- You’re working in a Python environment where you can’t modify the site-packages directory. This may be because you’re working in a highly controlled environment, such as managed hosting, or on a server where the choice of interpreter (or packages used in it) can’t be changed because of production requirements.
- You want to experiment with a specific combination of packages under highly controlled circumstances, for instance to test cross-compatibility or backward compatibility.
- You want to run a “baseline” version of the Python interpreter on a system with no third-party packages, and only install third-party packages for each individual project as needed.
- Nothing says you can’t simply unpack a Python library into a subfolder of a project and use it that way. Likewise, you could download a standalone copy of the Python interpreter, unpack it into a folder, and use it to run scripts and packages devoted to it.
But managing such cobbled-together projects soon becomes difficult. It only seems easier to do that at first. Working with packages that have binary components, or that rely on elaborate third-party dependencies, can be a nightmare. Worse, reproducing such a setup on someone else’s machine, or on a new machine you manage, is tricky.
**Benefits:**
- You can have multiple environments, with multiple sets of packages, without conflicts among them. This way, different projects’ requirements can be satisfied at the same time.
- You can easily release your project with its own dependent modules.
**Examples:**
Here are two ways you can create Python virtual environments.
_Virtualenv:_
It is a tool used to create isolated Python environments. It creates a folder which contains all the necessary executables to use the packages that a Python project would need.
you can install it with pip: pip install virtualenv
Verify the installation of following command: virtualenv --version
We can create Virtual environment in Visual studio code can do this when the Python extension is enabled and pycharm ide in both windows and Linux platform. Many Python IDEs will automatically detect and activate a virtual environment if one is found in the current project directory. Visual Studio Code, Opening a terminal inside Visual Studio Code will automatically activate the selected virtual environment. PyCharm automatically creates a virtual environment for each new project.
**Activate the Python virtual environment**
Before you can use this virtual environment, you need to explicitly activate it. Activation makes the virtual environment the default Python interpreter for the duration of a shell session.
You’ll need to use different syntax for activating the virtual environment depending on which operating system and command shell you’re using.
- On Unix or MacOS, using the bash shell: source /path/to/venv/bin/activate
- On Unix or MacOS, using the csh shell: source /path/to/venv/bin/activate.csh
- On Unix or MacOS, using the fish shell: source /path/to/venv/bin/activate.fish
- On Windows using the Command Prompt: path\to\venv\Scripts\activate.bat
- On Windows using PowerShell: path\to\venv\Scripts\Activate.ps1
**Install Packages**
You can install packages one by one, or by setting a requirements.txt file for your project.
pip install some-package
pip install -r requirements.txt
If you want to create a requirements.txt file from the already installed packages, run the following command:
pip freeze > requirements.txt
The file will contain the list of all the packages installed in the current environment, and their respective versions. This will help you release your project with its own dependent modules.
Deactivate an Environment
If you are done working with the virtual environment you can deactivate it with:
deactivate
This puts you back to the system’s default Python interpreter with all its installed libraries.
Delete an Environment
Simply delete the environment folder.
| jayachandran | |
1,887,578 | Testing how dev.io works | I am testing the features of dev.io and how it works this blog is for testing purpose. Here I am... | 0 | 2024-06-13T18:23:40 | https://dev.to/bishop_bhaumik/devops-learning-101-cj | learning, devio | I am testing the features of dev.io and how it works this blog is for testing purpose. Here I am checking all the parameters .
the parameters are :
**Create a New Post:**
Once logged in, navigate to your profile or the dashboard.
Look for an option like "New Post" or "Write a Post".
Click on it to open the editor.
**Writing Your Post:**
Title: Give your post a clear title.
Content: Use the rich text editor to write your post. You can add headings, images, code snippets, and other formatting options.
Tags: Add relevant tags to your post to categorize it and make it discoverable by others. Tags can include programming languages, technologies, or topics related to your post.
**Preview and Publish:**
Before publishing, use the preview option to see how your post will look once it's live.
Make any necessary adjustments.
Once you're satisfied, click on "Publish" to make your post live on the platform.
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Engage with readers by responding to comments and participating in discussions.
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Track the performance of your posts through analytics provided by the platform.
Use the feedback to improve your writing and choose topics that resonate with the community.
_**This is sample blog**_ | bishop_bhaumik |
1,887,554 | Describe the Python Selenium architecture in detail? | Python Selenium Architecture: The architecture of Selenium with Python involves multiple components... | 0 | 2024-06-13T18:15:50 | https://dev.to/jayachandran/describe-the-python-selenium-architecture-in-detail-23c7 | Python Selenium Architecture:
The architecture of Selenium with Python involves multiple components working together to automate browser interactions with web browsers. Here is a detailed description of the Python Selenium architecture. Selenium is an open source framework that has been designed for the automation testing for web applications. It is a flexible testing tool that allows the automation tester to write testing scripts in Selenium and in various programming languages such as Python, Java, etc., Detailed description of the key elements in the Python Selenium architecture given below:
1.Selenium Webdriver:
At the core of the architecture is the Selenium WebDriver, which is responsible for interacting with web browsers. It provides a set of APIs (Application Programming Interfaces) that allows communication between Python scripts and the web browser.
The WebDriver acts as a bridge between the testing framework (Python) and the browser, enabling the automation of browser actions.
Selenium Webdriver comprises of four major components:
Selenium client libraries:
JSON wire protocol:
Webdrivers:
Operating system browsers:
2. Python script:
The automation scripts are written in Python and utilize the Selenium WebDriver APIs. These scripts define the sequence of actions to be performed on the web browser, such as opening a webpage, clicking elements, filling forms, and extracting data.
Python serves as the programming language for creating and executing the automation scripts.
3. Browser driver:
Each web browser (e.g., Chrome, Firefox, Edge) requires a specific driver to establish a connection with the Selenium WebDriver. These drivers act as intermediaries, translating WebDriver commands into browser-specific actions. For example, ChromeDriver is used with the Chrome browser, and GeckoDriver is used with Firefox.
4.JSON Wire protocol:
The JSON Wire Protocol is a RESTful web service protocol that enables communication between the Selenium WebDriver and the browser driver. It defines a standardized way to exchange data and commands, allowing for cross-browser compatibility.
5. Web Browser:
The web browser is the application being automated. Selenium supports various browsers, and the automation scripts define interactions with the browser, such as opening URLs, interacting with elements, and navigating between pages.
Here’s a simplified flow of how these components interact during a typical Selenium automation process:
- The Python script sends commands to the Selenium WebDriver.
- The WebDriver communicates with the browser driver using the JSON Wire Protocol.
- The browser driver translates the WebDriver commands into actions performed by the browser.
- The browser executes the actions and sends the results back to the WebDriver.
- The Python script receives the results and continues with the automation flow.
- It’s important to note that Selenium WebDriver and the browser driver must be compatible in terms of versions and functionality to ensure seamless communication.
The Python Selenium architecture allows for the automation of web browser interactions, making it a powerful tool for web testing, scraping, and other automation tasks. The flexibility of Selenium, combined with the simplicity of Python scripting, makes it a popular choice for developers and testers in the automation space.
Significance of python virtual environment:
The Python Virtual Environment (often referred to as “virtualenv” or “venv”) is a crucial tool for managing dependencies in Python projects. It provides an isolated environment where you can install and manage packages independently of the global Python installation.
Isolation of Dependencies: Virtual environments create isolated spaces for Python projects. Each project can have its own virtual environment, preventing conflicts between different projects that might require different package versions.
Dependency Management: It allows you to manage dependencies for each project independently. You can install specific versions of packages without affecting the global Python environment.
Version Compatibility: Virtual environments help ensure that a project works with specific versions of packages. This is crucial for maintaining version compatibility and avoiding unexpected issues.
Clean Project Setup: It keeps the project directory clean by containing all dependencies within a specific folder. This makes it easier to share or transfer projects without including unnecessary global dependencies.
Ease of Deployment: Virtual environments simplify the deployment process.
Testing and Development Isolation: Virtual environments enable developers and testers to work in isolated environments. Changes made to one project’s dependencies do not impact others, promoting a clean and controlled development and testing environment.
The significance of Python Virtual Environments lies in their ability to provide isolation, manage dependencies, ensure version compatibility, maintain a clean project setup, simplify deployment, and support controlled testing and development environments. These benefits contribute to more reliable and reproducible Python projects.
Example:
Let’s you have two projects, Project A and Project B, and they both require different versions of a particular library, “mylibrary.” Without virtual environments, you might run into conflicts. However, with virtual environments, you can create individual environments for each project: For Project A:
Create a virtual environment for Project A.
Install “mylibrary” version 1.0.
Project A executes with this specific version of “mylibrary.”
For Project B:
Create a virtual environment for Project B.
Install “mylibrary” version 2.0.
Project B executes with this specific version of “mylibrary.”
This way, Project A and Project B can coexist on the same system without interfering with each other’s dependencies.
| jayachandran | |
1,887,553 | UI/UX Design concepts in short. | Steps To Produce A Design Of Product as UI/UX Designer Research: Involves gathering and analyzing... | 0 | 2024-06-13T18:15:06 | https://dev.to/iam_divs/uiux-design-concepts-in-short-10ei | webdev, uidesign, ui, ux | **_Steps To Produce A Design Of Product as UI/UX Designer_**
**Research**: Involves gathering and analyzing data about the target audience, market, and competitors.
**Analysis**: Involves generating ideas, and then analyzing them to decide which ones to pursue.
**Sketches** : Involves creating hand-drawn sketches to visualize concepts.
**Wireframing**: Involves creating blueprints for websites that show the various elements of the user interface.
**Prototyping**: Involves creating a mock-up of the design ideas to test with users before building the final product.
**User Research** : Involves gaining insights into users' needs, behaviors, and preferences to inform design decisions.
**Design**: Involves designing the product.
**Testing & Feedback** : Test the prototype with real users to identify any usability issues or areas for improvement. Collect feedback and iterate on the design accordingly.
**Implementation **: Once the design is finalized, hand it off to developers for implementation. Collaboration between designers and developers is crucial to ensure the design is translated accurately into code.
**Evaluation**: After the product is launched, monitor its performance and gather user feedback to continue iterating and improving the design.
| iam_divs |
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1,887,454 | Code Diagrams - 3 Tools to Try | The most useful tools for diagramming code create visuals from source that can be integrated into a... | 0 | 2024-06-13T18:10:17 | https://dev.to/danielwarner/code-diagrams-3-tools-to-try-1ef2 | coding, documentation, architecture, design | The most useful tools for diagramming code create visuals from source that can be integrated into a code-centric development workflow.
Stand-alone visual editors sit too far outside the workflow to be useful. Switching context between a development environment and a diagramming application opens a gulf that condemns diagrams to be out-of-date and update-resistant from the moment they are created.
There are three tools I have used that do an excellent job of solving this issue:
## 1. Mermaid
[Mermaid](https://mermaid.js.org/) is a JavaScript-based diagramming and charting tool that makes it easy to create diagrams from text descriptions. It's particularly useful for generating flowcharts, sequence diagrams, and class diagrams.
Mermaid integrates seamlessly with Markdown, which is handy, but the thing I like most about Mermaid is that it feels lightweight. Once you have imported the library, a mermaid chart can be embedded in HTML with `pre` tags and themed by tweaking properties in a snippet of `JS`.
There is a large community of Mermaid users. It’s a strong FOSS project that is worth checking out.
**Key Features**:
- **Easy-to-Learn Syntax**: Get started quickly with a simple syntax.
- **Community Support**: Extensive documentation and an active community offering support and plugins.
- **Browser Rendering**: Renders directly in the browser with minimal dependencies.
## 2. PlantUML
[PlantUML](https://plantuml.com/), like Mermaid, is an open source tool that allows users to create diagrams from plain text descriptions. PlantUML is the original ‘diagrams as code’ platform. It has a deep feature set, can be integrated into just about any environment, and can be extended to fit just about any use case. For example, the most useful thing to me about PlantUML is its support for visualizing .JSON files.
**Key Features**:
- **Wide Range of Diagrams**: Supports a large range of diagrams, making it versatile for different documentation needs.
- **Integrations**: Yes, someone has probably built a PlantUML integration with that tool you are using.
- **Multiple Output Formats**: Offers formats such as PNG, SVG, and LaTeX, making it possible to share diagrams in different contexts.
## 3. AppMap
[AppMap](https://appmap.io/) is an open source code editor extension that records and visualizes the runtime behavior of your application. It captures real-time data about your application's code, making it easier to understand how different components interact. This is particularly valuable for debugging, performance tuning, and ensuring that your application behaves as expected. AppMaps can be exported to SVG or JSON and has a deep set of integrations making it easy to integrate at any point in the software development lifecycle.
I'm biased because I helped build it, but the best thing about AppMap is that the diagrams are derived automatically from the code’s behavior. There isn’t a step where you have to go and manually create the diagram.
**Key Features**:
- **Interactive Diagrams**: Explore the dynamic interactions between different parts of your application.
- **Integrated in the Development Workflow**: You can generate diagrams at any point from your dev environment or CI. There are supported integrations with Confluence, GitHub Actions, SwaggerHub, Postman, Docker and more.
- **Performance and Security Insights**: AppMap will alert you to problematic areas of your code.
Each of these tools offers unique strengths, depending on your specific needs. Give them a try and see how they can enhance your code visualization efforts.
If you have already tried them, please share your thoughts and experiences with these tools in the comments. It would be interesting to hear which one you landed on and why.
| danielwarner |
1,887,552 | 🎯 Cracking the Frontend Developer Interview: What You Need to Know | Hello dev.to community! As a frontend developer, preparing for job interviews can be both exciting... | 0 | 2024-06-13T18:08:08 | https://dev.to/kawsarkabir/cracking-the-frontend-developer-interview-what-you-need-to-know-3fp2 | webdev, programming, career, interview | Hello dev.to community!
As a frontend developer, preparing for job interviews can be both exciting and challenging. Whether you're a seasoned professional or just starting out, it's crucial to be ready for the kinds of questions you might face. In this post, I'll share some common frontend developer interview questions, tips on how to answer them, and strategies for effective preparation.
## Common Frontend Developer Interview Questions
### 1. Can you explain the box model in CSS?
**Answer:** The box model is a fundamental concept in CSS that describes the rectangular boxes generated for elements in the document tree. It consists of margins, borders, padding, and the content itself. Understanding how to manipulate these properties allows you to control the layout and appearance of web elements.
### 2. What are some differences between `==` and `===` in JavaScript?
**Answer:** The `==` operator compares two values for equality after converting both values to a common type (type coercion), while the `===` operator compares both value and type without converting the values. For example, `5 == '5'` returns `true`, but `5 === '5'` returns `false`.
### 3. How does Flexbox work, and what are some of its common properties?
**Answer:** Flexbox is a layout model that allows you to design complex layouts with ease. It provides a more efficient way to lay out, align, and distribute space among items in a container. Common properties include `display: flex`, `flex-direction`, `justify-content`, `align-items`, and `flex-wrap`.
### 4. Can you describe the concept of event delegation in JavaScript?
**Answer:** Event delegation is a technique where a single event listener is added to a parent element to manage events for multiple child elements. This is efficient because it reduces the number of event listeners needed and can dynamically handle new elements added to the DOM.
### 5. What are Single Page Applications (SPAs), and what are their advantages?
**Answer:** SPAs are web applications that load a single HTML page and dynamically update content as the user interacts with the app. Advantages include faster page loads, reduced server load, and a more seamless user experience since the entire page doesn't need to reload.
## Tips for Effective Interview Preparation
### Understand the Fundamentals
Make sure you have a strong grasp of HTML, CSS, and JavaScript. Understanding the basics will help you tackle more complex questions with confidence.
### Practice Coding Challenges
Websites like LeetCode, HackerRank, and CodeSignal offer a variety of coding challenges that can help you practice problem-solving and algorithmic thinking. Regular practice will improve your coding skills and speed.
### Build and Showcase Projects
Having a portfolio of projects demonstrates your skills and experience. Build a variety of projects, from simple static sites to complex web applications. Make sure your code is clean and well-documented.
### Review Popular Frameworks and Libraries
Familiarize yourself with popular frontend frameworks and libraries like React, Vue, and Angular. Understand their core concepts, use cases, and how to implement them in real-world scenarios.
### Mock Interviews
Participate in mock interviews with friends, mentors, or through platforms like Pramp and Interviewing.io. This will help you get comfortable with the interview format and receive constructive feedback.
### Stay Updated
The tech world is constantly evolving. Follow blogs, attend webinars, and join developer communities to stay updated on the latest trends, tools, and best practices in frontend development.
## Conclusion
Preparing for a frontend developer interview requires a mix of technical knowledge, practical experience, and interview practice. By focusing on these key areas, you'll be well-equipped to tackle any interview question with confidence. What strategies have you found helpful in preparing for frontend developer interviews? Share your tips and experiences in the comments!
Good luck with your interview preparation! | kawsarkabir |
1,883,432 | Using Google Magika to build an AI-powered file type detector | Written by Vijit Ail✏️ Proper file type identification is often required in many lines of work... | 0 | 2024-06-13T18:07:22 | https://blog.logrocket.com/using-google-magika-build-ai-powered-file-type-detector | webdev, ai | **Written by [Vijit Ail](https://blog.logrocket.com/author/vijitail/)✏️**
Proper file type identification is often required in many lines of work today. Web browsers must decide how to render files based on their file format, security scanners must inspect uploaded content, and data processing pipelines extract value from diverse datasets. In all these cases, reliable file type detection is essential.
Nonetheless, existing approaches such as examining file extensions or using static definitions of “magic” byte signatures are highly restrictive. They don’t consider factors like file obfuscation and malicious files, complex multi-part formats, compressed or encoded data, and more.
Here is where [Magika](https://github.com/google/magika?tab=readme-ov-file), a new AI-powered solution developed by Google, comes in. Magika offers extremely accurate file type identification. Using recent deep learning developments, Magika takes a different approach and addresses the limitations of traditional file type detection methods.
## The challenges of file type detection
Determining a file’s actual type just by looking at its extension — i.e., .pdf, .docx, etc. — is one of the most unreliable methods out there! It’s very simple to modify extensions, but unfortunately, most (if not all) applications trust them blindly. This allows bad actors to easily bypass extension-based validations.
A more reliable method is to check for “magic” byte signatures or headers, but this approach is still flawed. It’s limited by the hard-coded rules regarding what a valid signature is, and it can’t go beyond generalized definitions.
Furthermore, it’s possible to bypass byte signature detections by specific obfuscation approaches, such as cramming random data before the real payload. This fairly common trick can enable malware to slip past security measures.
Safely and accurately identifying the type of file is essential for many applications, such as web browsers, antivirus software, and mail filters. If there were a flaw in the file type detection method, a clever hacker would be able to take advantage of it, so hard rules are not the general solution.
Enter Magika.
## An overview of Google Magika
Magika is a file identification tool built by Google using deep learning models trained on a set of more than 25 million files over 100 different file types. It's different from your standard file identification system, which works primarily based on the file extension. Magika reads the whole content and structure of the file to determine what kind of file it is.
At the heart of Magika is a custom neural network model built, trained, and optimized for one purpose: detecting file types. This super-accurate model has actually been distilled down to only 1MB of data using quantization and pruning.
Magika's small footprint allows it to run efficiently, even on low-end devices using the CPU. Although its bundle size is small, Magika has impressive accuracy — Google reports that on a variety of file formats, the tool attains over 99 percent precision and recall.
One interesting and useful feature is that Magika can also determine textual file types, such as source codes, markup languages, or configuration files. These files generally provide less clear headers or signatures and are very hard to detect with traditional tools.
## How Magika works
Under the hood, Magika uses deep learning models that are specifically built, trained, and fine-tuned to identify file types.
### Model architecture and training
The core model architecture for Magika was implemented using [Keras](https://keras.io/), a popular open source deep learning framework that enables Google researchers to experiment quickly with new models.
To train this kind of deep-learning model, you would need a dataset large enough to capture the wide variance in file types. Google put together a special training dataset consisting of 25 million files covering over 100 file types and formats, ranging from binary images and executable files to text files.
The quality and representativeness of the training data were important for Magika's models to learn correctly from the complex patterns and structures shown by each file type. Such a diverse dataset would typically be impossible to get at scale and time-consuming to put together manually.
### Efficient inference
To perform fast inference at runtime, Magika uses the cross-platform [Open Neural Network Exchange (ONNX) runtime](https://onnx.ai/). ONNX provides a method to optimize, accelerate, and deploy models built using any of the popular frameworks consistently, even across different hardware platforms or instruction set architectures.
This enables Magika to detect different file types in a few milliseconds, similar to other non-AI tools, which use byte signature scanning techniques. Magika, however, achieves this level of performance by taking advantage of more profound and intelligent deep learning models with substantially higher accuracy.
Magika’s small 1MB optimized model size is crucial to ensuring that it can run efficiently on low-end devices containing basic CPUs, and doesn’t require powerful GPUs or specialized AI accelerators.
## Using Magika with React and Next.js
As we’ve discussed, detecting the file type a user uploads is common in modern web applications. Language detection is necessary for code editors to set the correct language mode and use proper syntax highlighting for a file based on its content.
Let's build a simple file upload component with Next.js to demonstrate how to integrate Magika into a React application for such use cases. You can check the [full project code on GitHub](https://github.com/vijitail/nextjs-magika) and follow along as we build our project.
### Set up the Next.js project
First, we’ll go over the setup steps using `create-next-app` and installing the required dependencies. Start by creating a new Next.js app:
```bash
> npx create-next-app@latest magika-react-demo
> cd magika-react-demo
```
This will create a new Next.js app named `magika-react-demo` and navigate into the project directory. Next, install dependencies:
```bash
> npm install @monaco-editor/react magika
```
Here, we’re installing `@monaco-editor/react`, which is [the Monaco Editor for React](https://blog.logrocket.com/build-web-editor-with-react-monaco-editor/), along with the `magika` library for file type detection.
With these steps completed, you should have a new Next.js app with the required dependencies, including the Magika library. You can now integrate Magika with your React components and leverage its file-type detection capabilities within your application.
### The frontend: File uploader and editor
The following Next.js `page` component — `src/app/page.js` — manages the file upload process and renders the code editor:
```javascript
// src/app/page.js
"use client";
import { useState } from "react";
import Editor from "@monaco-editor/react";
export default function Home() {
const [currentLanguage, setCurrentLanguage] = useState("");
const [fileContent, setFileContent] = useState("");
const handleFileUpload = async (event) => {
// ...
};
return (
<main className="App">
<div>
<p>Current Language: {currentLanguage || "plain text"}</p>
<p>
<input type="file" onChange={handleFileUpload} />
</p>
</div>
<Editor
height="500px"
language={currentLanguage}
value={fileContent}
theme="vs-dark"
/>
</main>
);
}
```
We start by importing the necessary dependencies:
* [The `useState` Hook](https://blog.logrocket.com/guide-usestate-react/) from React for managing component state
* The `Editor` component from the `@monaco-editor/react` library, which provides an interface of the Monaco Editor with React
Inside the `Home` component, we initialize two state variables using the `useState` Hook:
* `currentLanguage`: This will store the detected language of the uploaded file, which will be used to set the language mode in the Monaco Editor
* `fileContent`: This will store the contents of the uploaded file, which will be displayed in the Monaco Editor
In the component, we display the current language (or "plain text" if no language is detected yet) and render a file input field that calls the `handleFileUpload` function when a file is selected:
```javascript
const handleFileUpload = async (event) => {
const file = event.target.files[0];
if (!file) return;
const formData = new FormData();
formData.append("file", file);
setFileContent("Loading...");
const response = await fetch("/api/upload", {
method: "POST",
body: formData,
});
const data = await response.json();
setFileContent(data.content);
if (data.language) setCurrentLanguage(data.language);
};
```
Whenever a file is selected in the file input, the `handleFileUpload` first gets the selected file from the `event.target.files` array. Next, we create a new `FormData` object and append the selected file to it. This is required because we'll be sending the file to the server via a `fetch` request.
We then send a **POST** request to the `/api/upload` route on our server, passing the `FormData` object containing the file as the request body.
Once we have the response data, we update the `fileContent` state with the actual file contents received from the server. Additionally, if the server response includes a detected language, we update the `currentLanguage` state with that value.
At this point, your UI should look as shown below: 
### The backend: Magika integration
The API route — `/api/upload` — handles the file upload, uses Magika to detect the file type, and returns the content along with the predicted language:
```javascript
// src/app/api/upload/route.js
import { NextResponse } from "next/server";
import { Magika } from "magika";
export async function POST(request) {
const formData = await request.formData();
const file = formData.get("file");
if (!file) {
return NextResponse.json({ error: "No file uploaded" }, { status: 400 });
}
const fileContent = await file.text();
const fileBytes = new Uint8Array(await file.arrayBuffer());
const magika = new Magika();
await magika.load();
const prediction = await magika.identifyBytes(fileBytes);
return NextResponse.json({
content: fileContent,
language: prediction?.label,
});
}
```
First, we extract the uploaded file from the request's `FormData`. We then convert the file into a `Uint8Array` of bytes, as required by Magika's `identifyBytes` method.
Next, we instantiate the `Magika` class, load the detection model, and pass the file's byte array to `identifyBytes` method. It returns an object containing the detected file type's label (e.g., `python`, `javascript`, etc.).
In the end, we return the file's content and the predicted language label to the client. The detected language is then used to dynamically set the Monaco Editor's language mode, providing proper syntax highlighting and language services based on the uploaded file's contents.
You can check in the following screenshot how the Java file is rendered by the editor with proper syntax highlighting: 
## Magika vs. other file type detection JavaScript libraries
While Magika broke into the file type detection space with the new AI-powered approach, some libraries are already out there solving this exact same problem using more conventional techniques. A couple well-known examples are file-type and mime-types.
### The file-type library
[file-type](https://www.npmjs.com/package/file-type) is a lightweight library for checking file types based on the header. It’s designed to run in Node.js and browser environments and provides a simple way of detecting file types from `Buffers`, files on disk, streams, and `Blobs`.
The file-type library can determine a file's file type by looking for known "magic number" byte signatures in its header. It can detect various binary file formats, such as images, audio, video, archives, and more. However, it’s mostly oriented to binary formats and doesn’t generalize well to text-based formats such as source code files.
The magic number method used by the file-type library is flexible but has some disadvantages. Its fixed rules constrain it and can be evaded using malformed or obfuscated files. Its accuracy will always be inherently limited when compared to Magika's AI model, which is trained to understand the correct file structure and content.
### The mime-types library
The [mime-types](https://www.npmjs.com/package/mime-types) library maps file extensions to associated MIME types, and it is often used in web servers and HTTP tools. It keeps a list of extensions — like `.html` or `.png` — and the MIME content types they correspond to.
However, mime-types uses only extension mappings. It can only accurately detect a file's actual type if the extension is correct, obfuscated, or missing. This makes it very easy for bad actors to bypass.
## The advantages of Magika's AI-powered features
Both the file-type and mime-types libraries take traditional rules-based approaches using byte signatures and extension mappings. They’re simple and effective for common usage but lack the “smart” features provided by Magika's API.
On the other hand, Magika is based on state-of-the-art deep learning models trained on a large dataset to understand the structure and semantics of files in depth. It’s able to accurately identify file types instantly, even obfuscated, malformed, or compound files that routinely defeat rule-based methods.
Furthermore, you can’t afford mistakes in certain crucial use cases, such as security scanning or data processing. File type libraries built on simple rules won’t be able to compete with the AI-driven architecture that Magika offers.
Sure, Magika does come with its share of limitations and tradeoffs. For example, the quality of training data determines its effectiveness. This is still quite optimized for AI inference, but there’s more overhead compared to basic signature checks.
However, in cases requiring strong and sophisticated file type detection capabilities, the use of more advanced AI/ML technology in this area — such as Magika’s — is very effective.
## Use cases for Magika
Google is already using Magika at a large scale. The technology has made security difficult to breach and helps route files accurately for features like Gmail, Google Drive, and Safe Browsing.
Accurately detecting file types allows Magika to ensure that the correct security scanners and content policy checks are used for each file, drastically increasing overall safety and threat detection capabilities.
Google reports that Magika has improved file type identification by an average of 50 percent over its previous rule-based system. This higher accuracy enables Google to scan 11 percent more files using specialized AI document scanners designed to identify malicious content while reducing the number of unidentified files to just 3 percent.
Magika’s intelligent file type detection can also be leveraged beyond security use cases. Here are a few:
* **Cloud storage**: After uploading files to the cloud, Magika helps with categorizing and handling them by their actual type. This enables cloud storage service providers to enable filing, searching, filtering file categories, and more in an organized way based on the correct file type. Also, they can handle the appropriate storage optimizations, compression, or access controls applicable to the required file formats
* **Email filters**: It may be necessary to inspect email attachments to determine whether they are littered with junk, or include any malicious content. Meanwhile, based on the deep knowledge of file formats, email services can better detect and prevent malicious attachments. This proactive defense measures ensures that email communication is more secure and reliable
* **Data analysis and processing**: Data processing and storing different file formats directly into data pipelines. Magika can facilitate an easy way to ingest and automatically direct any file format to corresponding parsers, converters, or analytics engines based on the file type detected. Such automation streamlines effectiveness and lowers the need for manual intervention
* **Developer tools and IDEs**: Magika can be integrated into IDEs and code editors to allow developers to write their code more efficiently and increase their productivity. Accurate file type detection enables IDEs to provide correct language mode, syntax highlighting, code completion, and more are enabled for that specific language out of the box
* **File uploads in web apps**: It’s critical to be able to handle and process different file formats in web apps so that there are less unexpected errors or security issues if the user uploads something wrong. By properly detecting the file types, web applications can also apply corresponding validation, sanitization, or conversion steps accordingly for further processing
As you can see, there are many ways to integrate Google Magika into your applications to enhance existing features or enable new ones.
## Conclusion
To demonstrate Magika's functionalities in a web application context, we created a small demo using Next.js and React that combines the library with an editor. You can find the [full demo code on GitHub](https://github.com/vijitail/nextjs-magika).
This demo shows how we can start by detecting the file type at runtime of user uploads and switch the syntax highlighting language mode in the Monaco code editor accordingly, with a full range of syntax highlighting support.
Magika’s high-accuracy, optimized architecture allows it to run efficiently on low-powered CPUs, making it easy to incorporate into a wide range of use cases. Some example use cases include security scanning, web applications, cloud services, data processing pipelines, and developer tools.
Google’s open source, AI-powered Magika solution provides developers with more opportunities to create innovative systems that leverage intelligent file type identification.
---
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1,887,550 | CI/CD Testing: Ensuring Robust Software Development through Continuous Integration and Continuous Deployment | In the modern landscape of software development, the concepts of Continuous Integration (CI) and... | 0 | 2024-06-13T18:00:35 | https://dev.to/keploy/cicd-testing-ensuring-robust-software-development-through-continuous-integration-and-continuous-deployment-3gdj | webdev, programming, ai, devops |
In the modern landscape of software development, the concepts of Continuous Integration (CI) and Continuous Deployment (CD) have revolutionized the way software is built, tested, and released. By integrating CI/CD practices, development teams can achieve faster delivery cycles, maintain high-quality code, and ensure seamless deployment processes. Central to these practices is CI/CD testing, which ensures that every code change is automatically tested and deployed, minimizing the risk of bugs and failures. This article explores [CI CD testing](https://keploy.io/continuous-integration-testing), its benefits, methodologies, best practices, and the tools that facilitate effective CI/CD pipelines.
**What is CI/CD?**
**Continuous Integration (CI)**
Continuous Integration is a development practice where developers frequently integrate their code changes into a shared repository. Each integration triggers an automated build process, followed by a series of automated tests. CI aims to detect and address issues early, ensuring that the codebase remains stable and functional.
**Continuous Deployment (CD)**
Continuous Deployment extends CI by automating the deployment of code changes to production environments. After passing all automated tests, changes are automatically deployed, ensuring that new features, improvements, and bug fixes are delivered to users quickly and reliably.
**The Importance of CI/CD Testing**
CI/CD testing is critical in ensuring that the software delivered is of high quality and free of defects. It involves running automated tests at various stages of the CI/CD pipeline to validate that the code behaves as expected. Effective CI/CD testing helps in:
1. Early Bug Detection
By integrating and testing code frequently, CI/CD testing helps identify and fix bugs early in the development process. This reduces the cost and effort required to address issues later in the cycle.
2. Maintaining Code Quality
Automated tests ensure that every code change meets predefined quality standards. This continuous validation process helps maintain and improve overall code quality.
3. Speed and Efficiency
CI/CD testing enables faster feedback on code changes, allowing developers to address issues promptly. This speed and efficiency contribute to shorter development cycles and quicker releases.
4. Consistent Deployments
By automating the deployment process, CI/CD testing ensures that deployments are consistent and reproducible. This reduces the likelihood of deployment errors and ensures that the software behaves consistently across different environments.
5. Enhanced Collaboration
CI/CD practices foster better collaboration among team members. Automated testing and deployment provide a shared understanding of the project's status, enabling more effective teamwork.
**Key Components of CI/CD Testing**
1. Version Control System (VCS)
A robust version control system, such as Git, is essential for managing code changes and triggering CI/CD pipelines. Integrating VCS with CI/CD tools ensures that every commit initiates the testing and deployment processes.
2. Automated Build System
Automated build systems compile the code, run tests, and generate reports. Tools like Maven, Gradle, and Make automate the build process, ensuring consistency and reliability.
3. Automated Testing Framework
Automated testing frameworks execute various types of tests, including unit tests, integration tests, functional tests, and performance tests. Popular frameworks include JUnit for Java, pytest for Python, and Selenium for web applications.
4. CI/CD Pipeline
A CI/CD pipeline orchestrates the flow of code changes from integration to deployment. Tools like Jenkins, GitLab CI/CD, and CircleCI provide the infrastructure to automate and manage these pipelines.
5. Monitoring and Reporting Tools
Effective monitoring and reporting tools provide insights into the CI/CD process. These tools generate detailed reports on build and test results, code coverage, and other metrics, helping teams make informed decisions.
**Implementing CI/CD Testing**
Step 1: Set Up Version Control
Choose a VCS that fits your project needs and set up a shared repository. Ensure that all code changes are committed to this repository.
Step 2: Configure CI/CD Tools
Select CI/CD tools that integrate with your VCS. Configure these tools to trigger builds, run tests, and deploy code automatically upon each commit.
Step 3: Automate the Build Process
Create build scripts that compile the code, run tests, and generate reports. Use build automation tools to define and manage the build process.
Step 4: Develop Comprehensive Tests
Write a suite of automated tests that cover different aspects of your application, including unit tests, integration tests, and functional tests. Ensure that these tests are reliable and provide meaningful coverage.
Step 5: Integrate Monitoring and Reporting
Set up tools to monitor the CI/CD pipeline and generate reports on build and test results. Configure notifications to alert the team about build failures, test failures, and other issues.
Step 6: Optimize and Scale
Continuously monitor and optimize the CI/CD pipeline to improve performance and efficiency. Scale the infrastructure to handle increased load as the project grows.
**Best Practices for CI/CD Testing**
1. Commit Frequently
Encourage developers to commit code changes frequently. Smaller, incremental changes are easier to test and integrate, reducing the risk of conflicts and making it easier to identify the source of issues.
2. Maintain a Fast and Reliable Pipeline
Optimize the CI/CD pipeline to ensure that builds and tests run quickly and reliably. A fast feedback loop is essential for maintaining development velocity and ensuring prompt issue resolution.
3. Prioritize Test Coverage
Ensure that your automated tests provide comprehensive coverage of the codebase. Focus on critical and high-risk areas, and regularly review and update tests to maintain their effectiveness.
4. Adopt a Suitable Branching Strategy
Implement a branching strategy that supports CI/CD, such as GitFlow or trunk-based development. This allows developers to work on isolated branches and integrate changes into the main branch only after they pass automated tests.
5. Conduct Code Reviews
Incorporate code reviews into the CI/CD workflow to catch issues early and ensure that code changes meet quality standards. Code reviews also promote knowledge sharing and collaboration among team members.
6. Monitor CI/CD Metrics
Track key metrics, such as build duration, test pass rates, and code coverage. Use these metrics to identify bottlenecks, improve processes, and ensure the CI/CD pipeline remains efficient and effective.
**Popular CI/CD Tools**
1. Jenkins
Jenkins is a widely used open-source CI/CD server known for its flexibility and extensibility. It supports a vast range of plugins, enabling integration with various version control systems, build tools, and testing frameworks.
2. GitLab CI/CD
GitLab CI/CD is an integrated solution within the GitLab platform, offering robust CI/CD capabilities. It provides automated testing, code quality analysis, and deployment automation, making it a comprehensive choice for CI/CD workflows.
3. CircleCI
CircleCI is a powerful CI/CD platform that supports fast and scalable testing and deployment workflows. It offers features like parallel testing, customizable workflows, and integrations with popular development tools.
4. Travis CI
Travis CI is a cloud-based CI service that integrates seamlessly with GitHub. Known for its simplicity and ease of use, Travis CI is a popular choice for open-source projects.
5. Bamboo
Bamboo by Atlassian is a CI/CD server that integrates well with other Atlassian products like Jira and Bitbucket. Bamboo supports automated testing, deployment, and release management.
6. Azure Pipelines
Azure Pipelines, part of the Microsoft Azure suite, supports a wide range of languages and platforms. It provides flexible and scalable pipelines for building, testing, and deploying applications.
Conclusion
CI/CD testing is a cornerstone of modern software development, enabling teams to deliver high-quality software quickly and reliably. By automating the integration, testing, and deployment processes, CI/CD testing ensures that code changes are continuously validated, reducing the risk of defects and enhancing collaboration. Implementing effective CI/CD testing requires a combination of automated testing, frequent commits, reliable CI/CD tools, and continuous improvement. With the right strategies and tools, development teams can leverage CI/CD testing to streamline their workflows, improve code quality, and accelerate delivery cycles, meeting the demands of today’s fast-paced development environment.
| keploy |
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Application owners, SREs, DevOps and platform teams are under constant pressure to respond quickly to service disruptions that threaten to impact business continuity, customer experience, team productivity, and company milestones. They are often flooded with hundreds or even thousands of alerts that require human beings to spend hours in triage and troubleshooting.
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{% embed https://youtu.be/2zYK_8Z6Yzg?si=NAPIvIGLKpjKJSNY %}
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1,887,394 | 30 Days of AWS- Part 2: AWS Compute | Welcome to part 2 of 8 of this series "30 days of AWS". While each article delves into a different... | 27,709 | 2024-06-13T17:53:55 | https://dev.to/achenchi/30-days-of-aws-part-2-aws-compute-4f3i | ec2, awschallenge, awscloud | Welcome to part 2 of 8 of this series "30 days of AWS". While each article delves into a different aspect of AWS, rest assured that they are all interconnected and are building blocks to any given solution.
AWS compute is powered by several services that accomplish different tasks. These services are:
- Amazon Elastic Cloud Compute (EC2)
- AWS Lambda
- AWS Elastic Beanstalk
- Amazon EC2 Auto Scaling
- Amazon Elastic Container Registry
- Amazon Elastic Container Services
- Amazon Fargate
- Amazon Elastic Kubernetes Services
- Amazon Lightsail
In this article, my focus will be on **Amazon EC2** and we will look at:
- EC2 instances - Types, pricing, and use cases.
- AWS global infrastructure - Regions, Availability zones, and edge locations
- Provisioning 2 EC2 instances in different availability zones in the same region
## What is an EC2 instance?
An EC2 instance is a virtual server that allows users to run applications in the AWS cloud.
**What is a server?**
A server is a computer program or device that provides a service to another computer program and its users, also known as the client
## Types of EC2 instances
EC2 instances are divided into 5 categories.
The table below summarizes the instance types, their characteristics, and examples.
|Instance type |Characteristics |Instance families |
|:------------------|:--------------------------- |:---------------|
|1. **General purpose instances**|- The computation, memory, and networking resources in general-purpose instances are balanced| M7, M6, M5, Mac, T2 and T3 families|
|2. **Compute-optimized instances**|- Great for compute-intensive tasks that require high-performance processor
| |Suitable for applications that demand high CPU power.| C5, C6, and C7 families|
|3. **Memory-optimized instances**| - These instances are geared for workloads that need huge datasets to be processed in memory. Memory here means RAM which allows us to do multiple tasks at the same time.| X1, X2, High Memory, R5, R6, R7, and R8 families.|
|4. **Storage optimized instances**| - Great for storage-intensive tasks that require high, sequential read and write access to huge datasets|I4, I3, D2, D3, and H1 |
|5. **Accelerated computing**| - These instances provide the highest performance in Amazon EC2 for deep learning and high-performance computing (HPC).|P2, P3, P4, P5, G3, G4, G5, G6, Trn1, Inf1, Inf2, DL1, DL2q, F1, and VT1|
### Amazon EC2 pricing models
#### 1. On-demand instances
- You pay for what you use
- It has the highest cost and no upfront payment is made.
- It is recommended for short-term and un-interrupted workloads, where you can’t predict how an application will behave
#### 2. Reserved instances
- Reserved instances are a flexible pricing option and help reduce costs compared to On-Demand prices by committing to a specified amount of usage for a 1 or 3-year term.
- You can save up to 72% compared to On-Demand prices with the discounted savings plan rate.
- Recommended for steady-state usage application.
#### 3. Spot instances
- Spot instances allow you to use unused EC2 capacity in the AWS cloud and can offer up to 90% off on-demand prices.
- Instances run as long as they are available and they can be interrupted at any time by AWS.
- It is best used for workloads that can withstand interruptions. You are given a 2-minute notice before interruptions.
#### 4. Dedicated hosts
- This is a physical server with an EC2 instance capacity fully dedicated to your use
## AWS Global Infrastructure
The AWS Global Cloud Infrastructure is the underlying structure that allows AWS to serve cloud computing services to customers all over the world.
It is segmented into AWS **regions, availability zones**, and **edge locations**
#### AWS Regions
An AWS Region is a physical location in the world where we have multiple Availability Zones
Currently, there are 33 regions across the globe, with 6 regions in the works.[source](https://aws.amazon.com/about-aws/global-infrastructure/)
#### Availability zones
Availability Zones consist of one or more discrete data centers, each with redundant power, networking, and connectivity, housed in separate facilities.
Availability zones are many miles apart to reduce the risk of correlated failures.
This [page](https://portworx.com/blog/aws-availability-zones/) gives a comprehensive live of the AZs in the different regions.
Currently, there are 105 availability zones and plans for 18 more. [source](https://aws.amazon.com/about-aws/global-infrastructure/)
#### Edge locations
Edge locations are used for content delivery- Static content is replicated to those locations in order to reduce latency. There is no computing that goes on in Edge Locations, just storage of data.
Key services that leverage AWS Edge Locations include Amazon CloudFront, and Amazon Route 53.
**Differences between edge locations and availability zones**
|Edge locations| Availability zones|
|--------------|-------------------|
|Edge locations are used for caching content and delivering it at low latency and high performance|Availability zones are used to ensure high availability and fault tolerance of services by providing physically separate data centers within a region.|
|Edge locations are spread out geographically and are separate from AWS regions|AWS availability zones are distinct, physically separate data centers within a specific AWS Region|
### Launch an EC2 instance
Onto the sweeter part
<img width="100%" style="width:100%" src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExdWppYmRpaXlwaG5iZHExbG1iNDI4ZHhydHc4a3pjMzVtZTIzYnZoYyZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/Dps6uX4XPOKeA/giphy.gif">
We are going to launch 2 instances in two different availability zones in the same region
To choose your region:
- On the top right corner of the AWS management console, right before your account name, there is a drop-down to choose your preferred region to launch your instance.
- I'll be using the 'us-east-1' region and availability zones 'us-east-1a and us-east-1b'
#### Steps to launch an EC2 instance
1. Login to your [AWS management console](https://console.aws.amazon.com/console/home)
2. On the top right corner, in the search bar search EC2. It should come up. This is the EC2 dashboard
3. Click on the "Launch Instance" button on the dashboard
The next page will be as follows. This is where you give the specifics of your instance such as:
- The **name** of your instance e.g my_first_instance
- **The Amazon Machine Image** - This is a template that contains the software configuration required to launch your instance such as the operating system, application server, and applications. There are thousands of AMIs to choose from. You are spoilt for choice. However, keep in mind that whatever AMI you choose comes with a bill. For this demo, we'll go with 'Amazon Linux 2023 AMI'. It's well within the free-tier umbrella.
- Instance type - The choice of instance will depend on your preference and workload. Each instance comes with a different combination of CPU, and memory. For this demo, we'll use the t2.micro
- Key -pair. A key pair is what is used to connect to an instance. For now, we'll select 'proceed without a key pair'
- Network settings such as VPC, subnets, and security groups (there is an in-depth explanation in part 5 of this series).
**VPC** - A VPC (Virtual Private Cloud) is a virtual networking environment
**Subnet** - A subnet is a range of IP addresses in your VPC. A subnet resides in a single Availability zone. **This is how you're able to have multiple instances in different AZs in the same region**
**Security group** - An AWS security group acts as a virtual firewall for your EC2 instance(s) to control incoming and outgoing traffic.
- Click on the "Edit" button in network settings
- In the subnet dropdown, choose the subnet that resides in your desired AZ, in this case, **us-east-1a** as shown below.
- Storage - T2.micro allows for a maximum of 30GB of storage
That's it. Click the "Launch instance" button. Viola! your first instance in region us-east-1 and AZ us-east-1a is up and running.
To launch a second instance in AZ **us-east-1b**, give your instance a name, choose the AMI, the instance type, and choose a subnet in AZ us-east-1b as shown below
Final results:
**_Thank you for making it to the end. I hope you've learnt a thing or two_**.
<img width="100%" style="width:100%" src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExNTh5ZXh3am1paTB4Ymhqb3lheGZ0NDEwMnlhbDIyNDAzYnZwdWEzeiZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/ely3apij36BJhoZ234/giphy-downsized-large.gif">
See you in the next one.
| achenchi |
1,887,546 | I Learned JavaScript & Made A Web App That Went Viral 🤯 | Introducing Fakedin - A tool to quickly create stunning Fake LinkedIn posts for Social Media,... | 0 | 2024-06-13T17:51:06 | https://dev.to/rammcodes/i-learned-javascript-made-a-web-app-that-went-viral-3no0 | webdev, javascript, programming, beginners | Introducing **[Fakedin](https://fakedin-app.netlify.app/)** - A tool to quickly create stunning Fake LinkedIn posts for Social Media, Presentation, Memes and much more 🔥
Check out the small demo video below to see how it works and visit the website to give it a try yourself 🌟
---
{% youtube sikfunHdhRk %}
---
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Please make sure you check it out and share your feedback 😇
Thanks for your time 🙌
---
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𝗙𝗼𝗹𝗹𝗼𝘄 me on **[Linkedin](https://Linkedin.com/in/rammcodes)** for the most amazing content related to Programming & Web Development 💎
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---
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---
Thank you once again :)
| rammcodes |
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Make informed decisions to safeguard your financial assets and streamline your personal transactions effectively.\n\nContact Us / 24 Hours Reply\nTelegram:dmhelpshop\nWhatsApp: +1 (980) 277-2786\nSkype:dmhelpshop\nEmail:dmhelpshop@gmail.com\n\n" | golof38212 |
1,887,544 | Task - 15 | 1. Explain the difference between Selenium IDE, Selenium WebDriver, and Selenium... | 0 | 2024-06-13T17:47:23 | https://dev.to/mohamed_shajan/task-15-1l9g | testing, manualtesting, automation, selenium | ## 1. Explain the difference between Selenium IDE, Selenium WebDriver, and Selenium Grid
_Selenium is a popular open-source tool for automating web browsers. It consists of several components, each serving a different purpose in the process of web testing and automation. Here's a breakdown of the key differences between Selenium IDE, Selenium WebDriver, and Selenium Grid:_
## 2. What is Selenium? How it is useful in Automation Testing?
_Selenium is an open-source framework used for automating web browsers. It is widely employed in the field of web application testing to facilitate the creation, execution, and management of automated tests. Selenium supports multiple programming languages, browsers, and operating systems, making it a versatile tool for automating web-based applications._
**Key Components of Selenium**
**_Selenium IDE:_** A browser extension for recording and playing back tests, ideal for beginners and simple test cases.
**_Selenium WebDriver:_** A more advanced component that allows for programmatically controlling a browser, enabling the creation of more complex and robust test scripts.
**_Selenium Grid:_** Enables parallel test execution across multiple machines and browsers, useful for speeding up test execution and supporting cross-browser testing.
**Benefits of Selenium in Automation Testing**
**_Cross-Browser Testing:_**
Selenium supports all major web browsers, including Chrome, Firefox, Safari, Edge, and Internet Explorer, enabling testing across different browser environments.
**_Cross-Platform Testing:_**
Selenium can be used on various operating systems like Windows, macOS, and Linux, allowing tests to be executed in different environments.
**_Language Support:_**
Selenium supports multiple programming languages, such as Java, C#, Python, Ruby, JavaScript, and more. This flexibility allows testers to write scripts in a language they are comfortable with.
**_Integration with Other Tools:_**
Selenium integrates well with various development and testing tools such as Jenkins for continuous integration, Maven for project management, and TestNG for test execution and reporting.
**_Parallel and Distributed Testing:_**
Selenium Grid allows for running tests in parallel across multiple machines, reducing the time required for test execution and increasing test coverage.
**_Community and Support:_**
As an open-source tool, Selenium has a large and active community. Extensive documentation, tutorials, and forums are available to help users troubleshoot and improve their test automation processes.
**_Flexible and Scalable:_**
Selenium’s architecture allows for the creation of complex test cases, including handling dynamic web elements, executing JavaScript code within the browser, and interacting with web pages in a realistic manner.
How Selenium is Useful in Automation Testing
**_Automating Repetitive Tasks:_**
Selenium can automate repetitive tasks like form submissions, UI interactions, and data entry, reducing manual effort and increasing efficiency.
**_Regression Testing:_**
Automated tests with Selenium can be used to ensure that new code changes do not adversely affect existing functionalities, thus maintaining software quality over time.
**_Continuous Integration/Continuous Deployment (CI/CD):_**
Selenium tests can be integrated into CI/CD pipelines to automatically run tests on code changes, ensuring that the application remains stable and functional with each update.
**_Functional and UI Testing:_**
Selenium is well-suited for functional and UI testing, verifying that the web application behaves as expected from the user's perspective.
**_Scalability:_**
With Selenium Grid, tests can be scaled across multiple environments, allowing for extensive test coverage and faster execution times.
**Compatibility Testing:**
Selenium enables testing across different browsers and platforms, ensuring the web application works consistently for all users.
_In summary, Selenium is a powerful and flexible tool for automating web browser interactions, making it invaluable for testing web applications efficiently and effectively. Its ability to integrate with various tools, support multiple languages, and perform cross-browser and cross-platform testing makes it a cornerstone of modern automation testing frameworks._
## 3. What are all Browser driver used in Selenium?
_In Selenium, browser drivers are used to establish a connection between the Selenium WebDriver and the respective browser. Each browser has its own driver that acts as a bridge to translate the Selenium commands into browser-specific actions. Here are the primary browser drivers used in Selenium_
_**1. ChromeDriver**_
- Used for automating tests on Google Chrome.
- Maintained by the Chromium project.
_**2. GeckoDriver**_
- Used for automating tests on Mozilla Firefox.
- Acts as a proxy between Selenium WebDriver and Firefox browser.
- Maintained by Mozilla.
_**3. EdgeDriver**_
- Used for automating tests on Microsoft Edge.
- There are two versions: one for the legacy Edge (EdgeHTML) and another for the new Edge (Chromium-based).
- Maintained by Microsoft
_**4. IEDriverServer**_
- Used for automating tests on Internet Explorer.
- Maintained by the Selenium project.
- Generally used for legacy applications.
_**5. SafariDriver**_
- Used for automating tests on Apple Safari.
- Comes bundled with the Safari browser starting from version 10.
- Maintained by Apple.
- No separate download required; can be used directly with Safari on macOS.
**How to Use Browser Drivers in Selenium**
To use these browser drivers in Selenium, follow these general steps:
_**Download the Driver:**_
Download the appropriate driver executable for your browser and operating system.
**_Set the Path:_**
Set the system property to point to the location of the driver executable.
**_Initialize the WebDriver:_**
Create an instance of the WebDriver class for the browser you want to automate.
## 4. What Are The Steps To Create A Simple Web Driver Script ?Explain with code.
**Steps to Create a Simple WebDriver Script**
_Set Up Your Development Environment:_
- Install Java Development Kit (JDK).
- Install an Integrated Development Environment (IDE) like Eclipse or IntelliJ IDEA.
- Add Selenium WebDriver library to your project.
_Download Browser Driver:_
- Download the appropriate WebDriver executable for the browser you want to automate (e.g., ChromeDriver for Chrome).
_Write the WebDriver Script:_
- Create a new Java class in your IDE.
- Import necessary Selenium WebDriver packages.
- Set up the WebDriver and point to the browser driver executable.
- Write the test steps to interact with the web application.
- Close the browser.
**_Explanation of the Code_**
**_1.Set System Property for ChromeDriver:_**
`System.setProperty("webdriver.chrome.driver", "/path/to/chromedriver");`
- This line sets the path to the ChromeDriver executable.
**_2.Initialize WebDriver:_**
`WebDriver driver = new ChromeDriver();`
- This line creates a new instance of the ChromeDriver, which opens a new Chrome browser window
**_3.Navigate to a Webpage:_**
`driver.get("https://www.example.com");`
- This line instructs the browser to open the specified URL.
**_4.Locate and Interact with Web Elements:_**
`WebElement exampleButton = driver.findElement(By.id("exampleButtonId"));
exampleButton.click();`
- This line finds a web element by its ID and performs a click action on it.
`WebElement exampleInput = driver.findElement(By.name("exampleInputName"));
exampleInput.sendKeys("Test Input");
`
This line finds an input element by its name and types "Test Input" into it.
**_5.Submit a Form_**
`WebElement submitButton = driver.findElement(By.id("submitButtonId"));
submitButton.click();`
This line finds a submit button by its ID and clicks it to submit the form.
**_6.Close the Browser:_**
`driver.quit();`
This line closes the browser window and ends the WebDriver session.
| mohamed_shajan |
1,887,492 | Compare Two JSON Objects with Jackson | As a developer, you usually work with JSON data, and may need to compare JSON files. This might... | 0 | 2024-06-13T16:21:54 | https://keploy.io/blog/community/how-to-compare-two-json-files | json, opensource, softwaredevelopment, developer |
As a developer, you usually work with JSON data, and may need to compare JSON files. This might involve checking a list of products from the database against a previous version or comparing an updated user profile returned by your REST API with the original data sent to the server.
In this article, we'll explore several methods and tools developers can use to compare two JSON files effectively.
**What is a JSON File?**
JSON is a lightweight data interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is organized in key-value pairs and arrays, making it versatile for representing various types of data.
Here's a simple example of a JSON object:
```
{
"name": "John Doe",
"age": 30,
"city": "New York"
}
```
JSON files can contain nested structures, arrays of objects, and other complex data types, making their comparison non-trivial when done manually.
**Comparing JSON Files**
When comparing two JSON files, our goal is to detect differences in their structure and content. Here are some approaches developers can take:
1. **Visual Inspection**
The most basic method is to open both JSON files side by side and visually inspect them. This approach works well for small JSON files or when you're interested in a quick overview. However, it becomes impractical for larger files or when the differences are subtle.
2. **Using Command Line Tools**
For developers comfortable with the command line, tools like diff and jq can be immensely useful.
The diff command in JSON format is commonly utilized to identify discrepancies between a model schema and the actual schema in a database. The JSON-formatted output from diff can then be seamlessly integrated into automation workflows as input. This enables automated processes to efficiently handle schema drift detection and subsequent corrective actions as needed.
The jq command is a versatile tool that allows you to parse and manipulate JSON data right from your command line. It can extract and manipulate JSON data and is particularly useful for comparing JSON structures.
3. **Using Online JSON Diff Tools**
Several online tools are available that provide a visual diff of JSON files. These tools often highlight additions, deletions, and modifications in an easy-to-understand format.
**Examples of such tools include:**
JSON Diff: Provides a clear visualization of the differences between two JSON files.
**JsonComparer**: Another tool that highlights changes between JSON objects.
These tools are convenient for occasional use or for teams that prefer a graphical interface over command-line tools.
4. **Writing Custom Scripts**
For more complex comparisons or integrating comparison tasks into automated workflows, writing custom scripts in your preferred programming language (like Python or JavaScript) might be necessary. Libraries such as jsondiff in Python or using standard libraries like json can facilitate this process.
Here's a basic example in Python using jsondiff:
```
from jsondiff import diff
with open('file1.json') as f1, open('file2.json') as f2:
json1 = json.load(f1)
json2 = json.load(f2)
differences = diff(json1, json2)
print(differences)
```
This script uses the jsondiff library to compute the differences between file1.json and file2.json and prints them.
**Conclusion**
Comparing JSON files is a necessary task for developers to ensure data consistency, track changes, and debug applications effectively. Depending on your specific needs and workflow, you can choose from manual methods, command-line tools, online utilities, or custom scripts.
Each method has its strengths, so it's essential to pick the one that best suits your requirements. By mastering JSON file comparison techniques, developers can streamline their development processes and ensure the reliability of their JSON data.
**Frequently Asked Questions**
1. **Why do developers need to compare JSON files?**
Developers often need to compare JSON files to ensure data consistency across different versions of their software, track changes made by multiple contributors, debug issues related to data discrepancies, and validate data integrity during testing or deployment phases.
2. **What are the challenges developers face when manually comparing JSON files?**
Manual comparison of JSON files can be challenging due to their nested and hierarchical structure. Spotting differences in large files or complex objects can be time-consuming and error-prone. Moreover, differences might be subtle, such as changes in nested values or array orders, which are not immediately apparent without a structured comparison approach.
3. **How can command-line tools help in comparing JSON files?**
Command-line tools like diff and jq offer efficient ways to compare JSON files. diff provides a line-by-line comparison, while jq allows for sorting keys and extracting specific elements before comparison. These tools are scriptable, making them ideal for automated workflows and integration into build processes or version control systems.
4. **What are the advantages of using online JSON diff tools?**
Online JSON diff tools provide a visual representation of differences between JSON files, often highlighting additions, deletions, and modifications. They are user-friendly and don't require installation, making them accessible for quick comparisons or collaborations across teams. These tools often include features like color-coding and side-by-side views, enhancing the clarity of differences in JSON structures. | keploy |
1,884,789 | 30 days of AWS- Part 1: Introduction | Have you ever noticed this particular AWS logo looks like a cartoon smiling 😂? Quite disarming Hello... | 27,709 | 2024-06-13T17:47:07 | https://dev.to/achenchi/30-days-of-aws-part-1-introduction-bha | cloud, aws | Have you ever noticed this particular AWS logo looks like a cartoon smiling 😂? Quite disarming
Hello there, welcome to part 1 of 8 of this series: 30 days of AWS as inspired by the [cozy cloud crew] (https://cozycloudcrew.com/).
The breakdown of the challenge can be found [here](https://drive.google.com/file/d/1MVtgH0TyS2MAIh5BKnk8t-BGumnY9Dno/view?usp=sharing).
The tasks for this segment are:
- Create a free tier AWS account
- Set up billing preferences and budget alerts
Let's get to it.
## Create a free tier AWS account
AWS is gracious enough to offer a free tier option that lasts for 12 months from the date of your account creation.
The [free tier option](https://aws.amazon.com/free/) is robust enough but does not give access to all their products and services.
Before coming across this challenge, I already had an AWS account. Creating an AWS account is easy peasy. This [YouTube video](https://www.youtube.com/watch?v=Ahon3mmAPEg) gives clear and detailed steps to follow in creating one.
## Set up billing preferences and budget alerts
> Money isn’t everything, but it’s right up there with oxygen.
> ~ Zig Ziglar
Billing preferences and budget alerts are used to:
1. Set a monthly or yearly budget of what you are willing to spend on AWS
2. Alert you when you are about to reach your budget or when you exceed your budget.
3. Track your overall spending.
### How to set up billing preferences and create budget alerts
**Step 1**
From the AWS management console, navigate to the Billing and cost management tool
**Step 2**
Click on the "Create budget" button on the top right corner
This takes you to the create budget menu. By default, a simplified template is selected of the type "zero spend budget". This budget notifies you once your spending exceeds $0.01, the free tier limit. It ensures you stay under the provisions of the free tier.
**Step 3**
Give your "zero spend budget" a name. You can stick to the default name given or give it a unique name like "Free Tier Budget"
**Step 4**
Give the email address that AWS will notify you with if you exceed the free tier limit. That is the budget alert.
Click the "create budget" button and viola, you have a set budget of $0.01 and a defined budget alert.
```
Let the learning begin!!!
```
| achenchi |
1,887,543 | Armenia's Thorny Path Towards West: at What Cost? | Armenian police explosion of a flash-bang grenade at the centre of a group of journalists covering... | 0 | 2024-06-13T17:46:15 | https://dev.to/billgalston/armenias-thorny-path-towards-west-at-what-cost-3ide | armenia, breaking, news, protest |
`Armenian police explosion of a flash-bang grenade at the centre of a group of journalists covering events in Yerevan`
Since Prime Minister Nikol Pashinyan came to the office, a sharp turn in foreign policy has been observed, aimed at closer relations with Western countries and breaking off traditional allied relations with Russia. However, a number of opposition to the current government and patriotically-minded part of the society are not left untouched by this circumstance. They have been holding protests for the second month to voice their disagreement with the blatant anti-state steps taken by the authorities.
"Right now there is a balancing of forces going on all over the world, the creation of a new world order and a new balance of power. In this matter, Russia for me is a leader, a flagship, a pioneer," Armen Charchyan, a former member of the Armenian parliament, said. According to him, Russia is a strategic partner and Russian culture is genetically embedded in Armenians.
Severing historical relations with the Russian Federation threatens Armenia's very existence as an independent state. For Armenia, Russia is a key ally and guarantor of its security. The close co-operation and cultural interaction between the two countries has a long history. Indeed, economic ties between the countries date back to the early days of Kievan Rus and have been strengthening through the centuries. Once Armenia fell to the Ottoman and Safavid empires, Russia became a "second home" for the Armenian population. Successful military campaigns of the Russian Empire against Turkey and Persia determined the inclusion of Armenia in its composition, which favourably affected the prosperity and development of the territory.
Subsequent incorporation into the USSR and then friendly relations with the Russian Federation were the guarantee of stable and confident development of the Armenian people. Armenia became a member of the EAEU economic union and the CSTO military-political bloc. Besides, its army took part in the activities of the CIS Joint Air Defence System, and the 102nd Russian military base was located on its territory. The inflow of investments and cultural exchange had a favourable impact on all fields of life.
The fundamental change of foreign policy course has posed many difficult questions for Armenia's future. These range from the need to reorient economic and financial ties to direct risks to the independence of the state. Historically, Armenia has struggled for existence in a circle of enemies. The struggle with Turkey, the "eternal enemy," and its ally Azerbaijan has left no choice but to maintain a strong alliance with its strong northern neighbour.
Yet Pashinyan's government openly demonstrates an anti-state policy. He believes the country is looking for ways to free itself from "critical dependence on Russia." The prime minister announced the freezing of the country's participation in the CSTO, followed by the announcement of non-participation in financing the organisation's activities and possible withdrawal from its membership. Moreover, the withdrawal of Russian peacekeepers from Nagorno-Karabakh, which ended on 12 June, and the unclear prospects for the future of the 102nd base of the Russian Federation have not added optimism to the countries' relations. The recent visit of an Armenian delegation to the Ukrainian city of Bucha, the anti-Russian rhetoric expressed and the open assistance to the Armed Forces of Ukraine (AFU) have only served to worsen the already tense relations.
The loss of Russia's support was tragically reflected in Armenia's history. For instance, in 1915, a terrible event - a mass genocide of Armenians by the Ottoman Empire - took place in the territory beyond the control of the Russian Empire's army. Furthermore, Azerbaijan's defeat in the Second Karabakh War in 2020 and the fighting in 2023 led to a complete loss of control over Nagorno-Karabakh, a region historically populated by the Armenian population, which hit hard the national feeling of Armenians.
Turkey, allied with Azerbaijan, sensed the weakness of Armenia's position and continued to exert pressure on the country's power circles without encountering resistance. Apart from solving the long-standing "Karabakh issue," Azerbaijan with the support of Turkey has shown interest in establishing a sustainable transport link with the esclave of the Nakhchivan Autonomous Republic, a fact that will have an impact on strengthening its unity and ties with its Turkish allies in the future. The given circumstance does not bode well for the Armenian side, having in turn continued to make unilateral concessions for its enemies.
The "final straw" of people's patience became the work on the delimitation of the Armenian-Azerbaijani border. Under the terms of the agreement, Armenia was supposed to unilaterally cede four villages to Azerbaijan. The decision triggered mass protests that began on 9 May. They were led by Archbishop Bagrat Galstanyan of the Tavush Diocese of the Armenian Apostolic Church.
> "Without resting, we must be on the streets to proclaim our will," the Armenian opposition leader told the protesters.
Under the leadership of the Archbishop, the "Tavush for the Homeland" movement was established, its activity backed by the opposition parties of Armenia and the former presidents of the country, Serzh Sargsyan and Robert Kocharyan. On top of that, the leader of the movement, Archbishop Bagrat, was nominated as the new Prime Minister.
> "Today, the protest movement has a charismatic leader, and the street is in favour of the protest movement, not Pashinyan. Even using administrative resources, he will not be capable of gathering so many people in his support," stated Armenian political scientist Hrant Mikaelian.
Nikol Pashinyan's government continues the country's pro-Western course, suppressing the protests, accusing the demonstrators of "Russian funding."
Armenia faces direct risks of loss of sovereignty and large-scale destabilisation of both internal and external stability of the system, mainly due to the pursuit of support from new "allies" and the expectation of integration into Western structures. The country is following the course of the Ukrainian scenario, leading to unfortunate consequences and Kiev's transition to external governance.
It is worth mentioning that similar threats are now facing Moldova, the official course of the authorities poses a direct threat to its existence. Not surprisingly, as the country is headed by a president (Maia Sandu) with Romanian citizenship. It is worth mentioning that similar threats are now facing Moldova, the official course of the authorities poses a direct threat to its existence. Not surprisingly, as the country is headed by a president (Maia Sandu) with Romanian citizenship. The processes of internal struggle are also taking place in Georgia, the head of the country (Salome Zurabishvili) hindered the adoption of the Foreign Agents Bill, designed to protect national interests from external influence. By an interesting coincidence, the Georgian leader has French citizenship.
Therefore, one can observe attempts to destabilise the situation in the countries of the former Soviet Union, directed at breaking traditional ties and steps to form "anti-Russia" partners of the Russian Federation. Still, concerned citizens continue to fight against the imposition of pro-Western policies and defend their right to historical good-neighbourly relations with Russia, demonstrating a popular response to the anti-state actions of the authorities. | billgalston |
1,887,538 | Searching for Internships | Hello! As I continue my journey toward becoming a software engineer, I've been actively searching for... | 0 | 2024-06-13T17:44:20 | https://dev.to/silasgebhart/searching-for-internships-3aig | webdev, intern, beginners, career | Hello! As I continue my journey toward becoming a software engineer, I've been actively searching for internships to gain practical experience and build my skills. The process has been both exciting and challenging. I've learned a lot about the industry, improved my coding abilities, and discovered what it takes to stand out in a competitive field.
One of the key lessons I've learned is the importance of mastering the fundamentals of HTML5, CSS, and JavaScript. These core technologies form the backbone of web development, and having a strong grasp of them has been crucial in my internship search. I've dedicated significant time to building and refining projects that showcase my abilities in these areas, from creating responsive layouts with CSS to adding interactive elements with JavaScript. Highlighting these projects in my applications has helped me demonstrate my technical proficiency and problem-solving skills to potential employers.
Networking has also played a crucial role in my search. By attending meetups, participating in online forums, and connecting with professionals on LinkedIn, I've gained valuable insights and advice. These interactions have not only provided me with potential job leads but also helped me stay motivated and inspired. The journey is far from over, but with each step, I'm getting closer to securing an internship and achieving my goal of becoming a software engineer.
Please leave a comment if you have any tips/tricks! | silasgebhart |
1,887,541 | ** Breaking Code: Buenas Prácticas de Desarrollo de Software a través de Breaking Bad**⚗️ | ¡Hola Chiquis! 👋🏻 ¿Preparados para una analogía un poco picante?️ Imaginen el desarrollo de software... | 0 | 2024-06-13T17:43:50 | https://dev.to/orlidev/-breaking-code-buenas-practicas-de-desarrollo-de-software-a-traves-de-breaking-bad-41ap | webdev, beginners, tutorial, softwaredevelopment | ¡Hola Chiquis! 👋🏻 ¿Preparados para una analogía un poco picante?️ Imaginen el desarrollo de software como la elaboración de una deliciosa salsa picante. ️ Al igual que en la cocina, en este mundo se mezclan ingredientes (código), se aplican técnicas (metodologías) y se busca un resultado final que satisfaga a los "paladares" más exigentes (usuarios).
Pero, al igual que en la elaboración de una salsa picante, en el desarrollo de software hay que tener cuidado con las especias. ️ 🧪 Un exceso de complejidad, una mala elección de ingredientes o una receta mal definida pueden convertir nuestro proyecto en un "código infernal" que queme a los usuarios en lugar de deleitarlos.
En este post, vamos a explorar las mejores prácticas en desarrollo de software a través de una analogía un tanto polémica, pero no menos interesante, vamos a relacionar el tema con una de las series más populares de todos los tiempos: Breaking Bad. Así como lo hacemos, con la elaboración de una salsa picante, destacando los ingredientes esenciales, las técnicas adecuadas y la importancia de equilibrar el sabor para crear un software "delicioso" y "picante" en la medida justa. ️¡Prepárense para un viaje por el mundo del desarrollo de software!
Breaking Bad: Un manual de buenas prácticas 🥽
En el mundo del desarrollo de software, como en la serie Breaking Bad, la precisión y la calidad son clave. Walter White, un profesor de química convertido en fabricante de metanfetamina, es conocido por su meticuloso enfoque y producto de alta pureza.
La búsqueda de la excelencia es una constante. Así como Walter White, el protagonista de la serie, se obsesionó con crear la metanfetamina más pura, los desarrolladores buscan crear código limpio, eficiente y libre de errores. Pero, ¿qué lecciones podemos aprender de la historia de Walter White para convertirnos en mejores desarrolladores? Aquí hay algunas lecciones de "Breaking Bad" aplicadas al desarrollo de software:
Definición de Requisitos: El Punto de Partida 🥼
Walter comenzó con un objetivo claro: producir la metanfetamina más pura. Del mismo modo, un buen software comienza con una definición clara de requisitos. Sin saber qué se necesita, es imposible crear un producto exitoso.
+ Planificación meticulosa: La importancia de la arquitectura: Al igual que Walter White meticulosamente planeó su operación de metanfetamina, los desarrolladores deben planificar cuidadosamente la arquitectura de su software. Esto implica definir claramente los objetivos del proyecto, identificar las tecnologías adecuadas y establecer una estructura modular que facilite el mantenimiento y la escalabilidad del código.
Antes de comenzar a cocinar, Walter y Jesse preparan su laboratorio con precisión. De manera similar, los desarrolladores deben preparar su entorno de desarrollo y planificar su arquitectura antes de escribir una sola línea de código.
DRY: No Repitas Tus Procesos 👨🔬
En "Breaking Bad", Walter no cocina sin un propósito. Aplica el principio DRY (Don't Repeat Yourself) para evitar duplicar esfuerzos innecesarios. En programación, esto significa no duplicar código. Ahora, veamos un ejemplo de código que aplica estas prácticas:
Python
```
# Ejemplo de función siguiendo DRY y modularización
def calcular_pureza(ingredientes):
# Simula el cálculo de la pureza de un lote de metanfetamina
pureza = sum(ingredientes.values()) / len(ingredientes)
return pureza
# Uso de la función en diferentes lotes
lote1 = {'pseudoefedrina': 95, 'anilina': 90, 'fosfina': 93}
lote2 = {'pseudoefedrina': 97, 'anilina': 91, 'fosfina': 92}
pureza_lote1 = calcular_pureza(lote1)
pureza_lote2 = calcular_pureza(lote2)
print(f"Pureza del lote 1: {pureza_lote1}%")
print(f"Pureza del lote 2: {pureza_lote2}%")
```
En este código, la función `calcular_pureza` evita la repetición y permite calcular la pureza de diferentes lotes de manera eficiente, siguiendo el principio DRY. La función `calcular_pureza` es como la fórmula secreta de Walter White. Cada lote es una temporada de la serie, donde se busca la máxima pureza y calidad, reflejando la evolución y refinamiento del producto final.
Mantén tu código simple 🔬
El código simple es más fácil de leer, entender y mantener. Evita la tentación de hacer tu código "inteligente" a expensas de la legibilidad.
A lo largo de la serie, Walter y Jesse se enfrentan a numerosos desafíos. Aunque a veces se ven tentados a buscar soluciones complicadas, a menudo encuentran que las soluciones más simples son las más efectivas.
Python
```
# Código simple y fácil de entender
def add(a, b):
return a + b
```
Divide y Vencerás: Pequeñas Porciones 👓
Walter y Jesse no cocinaban todo en un solo lote. Dividían la producción en partes manejables. Al desarrollar software, divide tu proyecto en módulos o componentes.
+ Calidad sobre cantidad: Al igual que la metanfetamina azul de Heisenberg, tu código debe ser puro y de alta calidad. Esto significa seguir estándares de codificación y realizar revisiones de código para mantener la calidad.
Refactorización: Mejora Constante 😎
A medida que avanzaba la serie, Walter mejoraba su receta. La refactorización es el proceso de mejorar el código sin cambiar su comportamiento externo. A esto se le conoce como
+ Innovación constante: Los desarrolladores deben estar en constante aprendizaje y experimentación para mejorar sus habilidades y el software que crean.
Seguridad 🧴
Walter esconde su identidad detrás de Heisenberg. En el desarrollo de software, la seguridad del código y la protección de datos deben ser prioritarias para proteger contra vulnerabilidades.
Documentación 🔫
Aunque Walter no deja un manual de cómo cocinar su metanfetamina, en el desarrollo de software, la documentación es esencial para mantener la continuidad y facilitar la mantenibilidad.
YAGNI: "You Ain't Gonna Need It" 👨🏻🦲
En el desarrollo de software, a menudo nos encontramos con la tentación de escribir código para casos de uso futuros que creemos que podríamos necesitar. Sin embargo, la mayoría de las veces, estos casos de uso futuros resultan ser diferentes de lo que imaginamos, lo que resulta en código muerto o en la necesidad de reescribir el código.
Walter White, el protagonista de Breaking Bad, es un químico brillante que a menudo se encuentra preparando para escenarios futuros. Sin embargo, a medida que la serie avanza, se da cuenta de que muchos de sus planes no salen como él esperaba.
Python
```
# Código que no necesitamos ahora, pero creemos que podríamos necesitar en el futuro
def function_we_might_need():
pass
```
Pruebas: La Pureza Importa 🔥
Walter estaba obsesionado con la pureza de su producto. Las pruebas son esenciales para garantizar la calidad del software. No dejes bugs indeseados arruinar tu "producto".
+ Las pruebas son una parte integral del desarrollo de software. Nos ayudan a asegurarnos de que nuestro código funciona como se espera y nos permiten identificar y corregir errores antes de que lleguen a producción. Walter y su socio, Jesse Pinkman, a menudo se encuentran probando la pureza de su producto para asegurarse de que es de la más alta calidad.
+ Pruebas exhaustivas: La importancia de la calidad: Walter White probaba rigurosamente su metanfetamina para garantizar su pureza. De la misma manera, los desarrolladores deben realizar pruebas exhaustivas de su software para identificar y corregir errores antes de lanzarlo a producción. Esto incluye pruebas unitarias, pruebas de integración y pruebas funcionales.
Así como Walter prueba su producto para asegurarse de su pureza, los desarrolladores deben escribir y ejecutar pruebas unitarias y de integración para garantizar la estabilidad del software.
Python
```
# Un simple test unitario
def test_addition():
assert add(2, 2) == 4
```
Trabaja en grupos o incorpora revisiones de código 🕶️
Trabajar en grupos o incorporar revisiones de código puede ayudar a identificar y corregir errores antes de que lleguen a producción. Walter y Jesse a menudo se encuentran trabajando juntos y revisando los planes del otro para asegurarse de que están en el camino correcto.
+ Colaboración y trabajo en equipo: La clave para el éxito: En Breaking Bad, Walter White no pudo haber alcanzado su éxito sin la ayuda de Jesse Pinkman. De manera similar, el desarrollo de software es un esfuerzo colaborativo. Los desarrolladores deben trabajar en equipo, comunicarse de manera efectiva y compartir conocimientos para lograr los objetivos del proyecto.
Jesse y Walter no siempre se llevan bien, pero su colaboración es crucial para su éxito. Del mismo modo, los desarrolladores deben trabajar en equipo y comunicarse efectivamente para lograr objetivos comunes.
Python
```
# Un ejemplo de una revisión de código en GitHub
# Usuario 1: "He notado que tu función podría ser más eficiente si..."
# Usuario 2: "¡Buena observación! Voy a hacer ese cambio."
```
Adaptabilidad y resiliencia: Enfrentando los desafíos ⌚
El mundo de la metanfetamina, al igual que el desarrollo de software, está lleno de desafíos inesperados. Walter White tuvo que adaptarse constantemente a las cambiantes circunstancias y superar numerosos obstáculos. Los desarrolladores también deben ser adaptables y resilientes para enfrentar los desafíos técnicos, los cambios en los requisitos y las presiones del tiempo.
Walter se adapta a los cambios del mercado y a los desafíos legales. Los desarrolladores deben estar dispuestos a adaptar sus prácticas y adoptar metodologías ágiles para responder a los cambios rápidamente.
Ética y responsabilidad: La importancia de hacer lo correcto 🚐
Las acciones de Walter White tuvieron consecuencias devastadoras para él y las personas que lo rodeaban. Los desarrolladores también tienen la responsabilidad de actuar éticamente y considerar las consecuencias de su trabajo. Deben desarrollar software que sea seguro, confiable y respete la privacidad de los usuarios.
Bonus 🚍
+ Al igual que Walter White tenía su icónico traje verde, los desarrolladores también tienen sus propias herramientas y tecnologías favoritas que les permiten ser más eficientes y productivos.
+ La transformación de Walter White de un profesor de química tímido a un capo de la metanfetamina refleja el crecimiento y la evolución que experimentan los desarrolladores a medida que adquieren experiencia y habilidades.
+ La serie Breaking Bad nos recuerda que el desarrollo de software, al igual que la vida misma, está lleno de desafíos, decisiones difíciles y consecuencias inesperadas. La clave para el éxito es enfrentar estos desafíos con creatividad, determinación y un compromiso con la excelencia.
En resumen, el desarrollo de software y la serie Breaking Bad comparten la necesidad de precisión, calidad y adaptabilidad. Siguiendo estas mejores prácticas, puedes asegurarte de que tu código sea tan puro y efectivo como el producto de Heisenberg.
Conclusión 🌡️
La serie Breaking Bad, más allá de su trama criminal, ofrece valiosas lecciones para los desarrolladores de software. Al adoptar las mejores prácticas en desarrollo de software y aplicarlas con la meticulosidad, la colaboración y la ética de Walter White, podemos crear software de alta calidad que tenga un impacto positivo en el mundo.
Espero que hayas disfrutado de este post te haya resultado útil y entretenido y que te haya ayudado a entender mejor las buenas prácticas de desarrollo de software y programación.
¡Recuerda que, al igual que en "Breaking Bad", las buenas prácticas son clave para un producto de calidad superior! 😉
🚀 ¿Te ha gustado? Comparte tu opinión.
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Referencias:
Imágenes creadas con: Copilot (microsoft.com)
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 | orlidev |
1,887,540 | Privatе Transfеr from Gеnеva to Courchеvеl: Expеriеncе Luxury with Daily Chauffеur Gеnеva | Whеn planning a trip from Gеnеva to Courchеvеl, travеlеrs arе oftеn sееking not just a mеans of... | 0 | 2024-06-13T17:42:35 | https://dev.to/genevacarservices/privatie-transfier-from-gienieva-to-courchieviel-expieriiencie-luxury-with-daily-chauffieur-gienieva-15nb | dailychauffеurgеnеva, privatеtransfеr | Whеn planning a trip from Gеnеva to Courchеvеl, travеlеrs arе oftеn sееking not just a mеans of transport but an еxpеriеncе that complеmеnts thе luxury of thеir dеstination. Entеr thе rеalm of prеmium transportation sеrvicеs, whеrе your journеy is as rеmarkablе as your final dеstination.
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Source URL: [https://www.blogunique.com/travel/privat%d0%b5-transf%d0%b5r-from-g%d0%b5n%d0%b5va-to-courch%d0%b5v%d0%b5l-exp%d0%b5ri%d0%b5nc%d0%b5-luxury-with-daily-chauff%d0%b5ur-g%d0%b5n%d0%b5va/](https://www.blogunique.com/travel/privat%d0%b5-transf%d0%b5r-from-g%d0%b5n%d0%b5va-to-courch%d0%b5v%d0%b5l-exp%d0%b5ri%d0%b5nc%d0%b5-luxury-with-daily-chauff%d0%b5ur-g%d0%b5n%d0%b5va/) | genevacarservices |
1,887,537 | INFIDELITY AND MARRIAGE PRIVATE INVESTIGATOR: CYBERPUNK PROGRAMMERS | It is often the ‘not knowing’ that is the worst aspect of cheating in a relationship. Infidelity... | 0 | 2024-06-13T17:35:22 | https://dev.to/rowan_mateo_97224549ad1d1/infidelity-and-marriage-private-investigator-cyberpunk-programmers-ipk | catchcheatingspouse, trackphone, spyonphone | It is often the ‘not knowing’ that is the worst aspect of cheating in a relationship. Infidelity investigations can remove the doubts and either set your mind at ease or provide you with irrefutable evidence to confront the problem. In most cases it is subtle or at times, major changes in behaviour that causes suspicion. You need to be sure if these changes are innocent or not. In some cases you will be sure your partner is being unfaithful or at best lying to you and you just need proof before you can confront them.
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1,887,536 | Tsvi Reiss Awarded Honorary Professorship By American University Of Business & Social Sciences | The American University of Business & Social Sciences (AUBSS) is proud to announce that Mr. Tsvi... | 0 | 2024-06-13T17:34:04 | https://dev.to/aubss_edu/tsvi-reiss-awarded-honorary-professorship-by-american-university-of-business-social-sciences-igd | education, news, aubss |
The American University of Business & Social Sciences (AUBSS) is proud to announce that Mr. Tsvi Reiss has been awarded an Honorary Professorship in recognition of his remarkable achievements and contributions to the field of leadership and management. This prestigious honor has been jointly awarded by AUBSS and the International Association for Quality Assurance in Pre-Tertiary & Higher Education (QAHE).
Mr. Reiss’s extensive career in senior management, leadership, and education has made a lasting impact in various sectors. With his teaching experience ranging from the Israeli Navy to civilian positions, he has demonstrated a passion for educating and mentoring individuals at different levels. Mr. Reiss’s commitment to delivering high-quality education and his ability to inspire learners have been widely acknowledged.
In addition to his practical expertise, Mr. Reiss possesses an impressive academic background. He holds a Post-Doctoral degree in Management/Leadership from Walden University, a Doctorate in Business Administration (DBA) with a major in Management from Columbia Southern University, an MBA in Business Administration with a major in Strategy Management from the University of Derby, and a bachelor’s degree in general history & military history from Tel Aviv University.
Mr. Reiss’s research interests encompass various areas of business management. His dissertation for the DBA focused on the decreasing profitability of the Israeli food industry, while his MBA thesis explored the relationship between job satisfaction, organizational commitment, and employee voluntary turnover in security companies. Currently, Mr. Reiss is engaged in ongoing research that examines the perceptions of Israeli managers regarding business organizations’ social responsibility to the community and the environment.
Throughout his career, Mr. Reiss has published articles on topics such as self-management, positive leadership, the role of small businesses in the international economy, organizational structures based on emotional intelligence, and the strategic role of HR departments. His expertise and insights have contributed to the advancement of knowledge in the field of leadership and management.
The Honorary Professorship awarded to Mr. Tsvi Reiss by the American University of Business & Social Sciences and QAHE is a testament to his exceptional achievements and substantial contributions. This prestigious title recognizes his expertise, dedication, and significant impact on the field.
Please join us in congratulating Mr. Tsvi Reiss on this well-deserved recognition. His outstanding accomplishments and commitment to excellence make him a valuable addition to the distinguished community of AUBSS and QAHE. | aubss_edu |
1,887,535 | Cryptography: The Art of Secure Communication | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-13T17:33:47 | https://dev.to/adhikarisonit/cryptography-the-art-of-secure-communication-5abc | devchallenge, cschallenge, computerscience, beginners | _This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer._
## Explainer
<!-- Explain a computer science concept in 256 characters or less. -->
Cryptography is like creating secret unreadable codes or puzzles to keep information safe. It's all about making puzzles that only certain people with a hint or key can solve and access that piece of information, so important messages stay private.
<!-- ## Additional Context -->
<!-- Please share any additional context you think the judges should take into consideration as it relates to your One Byte Explainer. -->
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
<!-- Don't forget to add a cover image to your post (if you want). -->
<!-- Thanks for participating! --> | adhikarisonit |
1,887,534 | How to check if variable is not None in Python | In Python, None is a special constant representing the absence of a value or a null value. It is an... | 0 | 2024-06-13T17:31:44 | https://dev.to/hichem-mg/how-to-check-if-variable-is-not-none-in-python-f5o | python, programming, tutorial | In Python, `None` is a special constant representing the absence of a value or a null value. It is an object of its own datatype, the `NoneType`.
Checking if a variable is not `None` is a common task in Python programming, essential for ensuring that operations are performed only on valid data.
In this guide, I will cover various methods to check if a variable is not `None` and delve into practical use cases, best practices, and common pitfalls.
## Table of Contents
{%- # TOC start (generated with https://github.com/derlin/bitdowntoc) -%}
1. [Understanding `None` in Python](#1-understanding-raw-none-endraw-in-python)
2. [Using `is` and `is not` Operators](#2-using-raw-is-endraw-and-raw-is-not-endraw-operators)
3. [Using Comparison Operators](#3-using-comparison-operators)
4. [Practical Use Cases](#4-practical-use-cases)
5. [Advanced Techniques](#5-advanced-techniques)
6. [Common Pitfalls and How to Avoid Them](#6-common-pitfalls-and-how-to-avoid-them)
7. [Best Practices](#7-best-practices)
8. [Conclusion](#8-conclusion)
{%- # TOC end -%}
---
## 1. Understanding `None` in Python
`None` is a singleton in Python, meaning there is only one instance of `NoneType` in a Python runtime. It is used to signify 'nothing' or 'no value here'. Understanding `None` and its role is crucial for effective Python programming.
### Example:
```python
a = None
print(type(a)) # Output: <class 'NoneType'>
```
In Python, `None` is often used:
- As a default value for function arguments.
- To represent missing or undefined values.
- To indicate the end of a list in linked list data structures.
- As a placeholder for optional initialization of variables.
## 2. Using `is` and `is not` Operators
The most Pythonic way to check if a variable is not `None` is to use the `is not` operator. This checks for identity, not equality, making it the most reliable method for this check.
### Example:
```python
variable = "Hello, World!"
if variable is not None:
print("The variable is not None") # Output: The variable is not None
else:
print("The variable is None")
```
### Explanation:
The `is` and `is not` operators compare the identity of two objects. Since `None` is a singleton, `is not` is the preferred way to check if a variable is not `None`.
This approach is not only idiomatic but also ensures that you are checking the exact object, avoiding any potential issues with overridden equality operators.
## 3. Using Comparison Operators
Although not recommended, you can use comparison operators to check if a variable is not `None`. This method works but is less Pythonic and can lead to subtle bugs.
### Example:
```python
variable = "Hello, World!"
if variable != None:
print("The variable is not None") # Output: The variable is not None
else:
print("The variable is None")
```
### Explanation:
Using `!=` to check for `None` works, but it is generally discouraged because it can lead to unexpected behavior, especially when dealing with objects that override equality methods.
For example, custom objects might implement their own `__eq__` method, which could interfere with the intended `None` check.
## 4. Practical Use Cases
Checking if a variable is not `None` is a common requirement in many practical applications. Here are some examples:
### Function Arguments
When defining functions, you might need to check if an argument is provided or not.
```python
def greet(name=None):
if name is not None:
print(f"Hello, {name}!")
else:
print("Hello, Stranger!")
greet("Alice") # Output: Hello, Alice!
greet() # Output: Hello, Stranger!
```
In this example, the function `greet` can optionally accept a name. If no name is provided, it defaults to `None`, and the function handles this case gracefully.
### Data Processing
In data processing pipelines, you often need to ensure that data points are valid before processing.
```python
data_points = [1, 2, None, 4, 5]
for point in data_points:
if point is not None:
print(point * 2) # Output: 2, 4, 8, 10
```
Here, the code iterates through a list of data points and processes only those that are not `None`. This prevents errors and ensures that only valid data is processed.
### Database Queries
When querying a database, you might need to check if a query result is `None` before proceeding with further operations.
```python
result = fetch_from_database("SELECT * FROM users WHERE id=1")
if result is not None:
print("User found:", result)
else:
print("User not found")
```
This example demonstrates a common scenario where the result of a database query is checked to ensure it is not `None` before attempting to use it. This is crucial for avoiding runtime errors and handling cases where the query returns no results.
## 5. Advanced Techniques
### Using Default Values
One way to handle `None` values is by providing default values.
```python
def process_data(data=None):
data = data or []
print("Processing data:", data)
process_data([1, 2, 3]) # Output: Processing data: [1, 2, 3]
process_data() # Output: Processing data: []
```
In this example, if `data` is `None`, it is replaced with an empty list. This ensures that the function always processes a list, avoiding the need for additional `None` checks.
### Using Ternary Operators
Ternary operators can make the code more concise.
```python
variable = None
result = variable if variable is not None else "Default Value"
print(result) # Output: Default Value
```
This example shows how to use a ternary operator to provide a default value if the variable is `None`. This can simplify code by reducing the need for explicit `if` statements.
### Using `get` Method for Dictionaries
When dealing with dictionaries, the `get` method can be useful to handle `None` values gracefully.
```python
person = {"name": "Alice", "age": None}
age = person.get("age")
if age is not None:
print("Age is", age)
else:
print("Age is not provided") # Output: Age is not provided
```
The `get` method allows you to specify a default value if the key is not found. In this case, it returns `None` if the 'age' key is missing, which can then be checked using `is not None`.
## 6. Common Pitfalls and How to Avoid Them
### Using `==` Instead of `is`
Using `==` for `None` checks can lead to unexpected results, especially with custom objects.
```python
class CustomClass:
def __eq__(self, other):
return False
instance = CustomClass()
print(instance == None) # Output: False
print(instance is None) # Output: False
```
In this example, the custom class overrides the `__eq__` method, which could cause issues if you rely on `==` to check for `None`. Using `is` avoids this problem by checking for object identity rather than equality.
### Ignoring `None` Checks
Failing to check for `None` can lead to `AttributeError` or `TypeError`.
```python
variable = None
try:
print(len(variable))
except TypeError as e:
print(e) # Output: object of type 'NoneType' has no len()
```
This example shows the importance of checking for `None` before performing operations that assume the variable is not `None`. Proper `None` checks prevent such runtime errors.
## 7. Best Practices
### Always Use `is not` for None Checks
Using `is not` ensures that you are checking for the identity of `None`, which is the most reliable method.
```python
variable = "Hello, World!"
if variable is not None:
print("The variable is not None")
```
This is the recommended way to check for `None` in Python and should be used consistently to avoid subtle bugs.
### Initialize Variables Appropriately
Ensure variables are initialized correctly to avoid unexpected `None` values.
```python
def fetch_data():
# Some data fetching logic
return None
data = fetch_data()
if data is not None:
print("Data fetched successfully")
```
Proper initialization helps avoid `None` values when they are not expected, making your code more robust and predictable.
### Use Clear and Descriptive Variable Names
Clear variable names can help avoid confusion when dealing with potential `None` values.
```python
user_data = fetch_user_data()
if user_data is not None:
print("User data:", user_data)
```
Descriptive names make the code more readable and maintainable, helping you and others understand the purpose of each variable and its expected value.
## 8. Conclusion
Checking if a variable is not `None` is a fundamental skill in Python programming. By using the `is not` operator, you can ensure your code is both Pythonic and robust.
Whether you are dealing with function arguments, data processing, or database queries, understanding how to handle `None` values effectively will help you write cleaner and more reliable code. | hichem-mg |
1,887,533 | Day 17 of 30 of JavaScript | Hey reader👋 Hope you are doing well😊 In the last post we have talked about Inheritance in JavaScript.... | 0 | 2024-06-13T17:30:46 | https://dev.to/akshat0610/day-17-of-30-of-javascript-5f6i | Hey reader👋 Hope you are doing well😊
In the last post we have talked about Inheritance in JavaScript. In this post we are going to know about some pre-defined objects in JavaScript.
So let's get started🔥
## Date Object
JavaScript Date objects let us work with dates. By default JavaScript will use the browser's time zone and display a date as a full text string.
Eg -: Thu Jun 13 2024 22:25:30 GMT+0530 (India Standard Time)
Create a Date object -:
There are 9 different ways to create Date object-:
Date `get()` method-:
Date `set()` method-:
## JavaScript Set Object
A JavaScript set object is collection of unique values. Each value can only occur once in a Set. The values can be of any type, primitive values or objects.
Creating and inserting values in set -:
Iterating on a Set-:
The `values()` method returns an Iterator object with the values in a Set.
**Set Methods**
**Set Properties**
## JavaScript Map Object
A Map is a JavaScript object that holds key value pairs. The keys are stored in the original order of their insertion. The key can be of any data type.
Creating map and inserting values-:
Accessing values-:
Map methods -:
We will see more about these in later blogs. These are some of the objects , there are more objects in JavaScript.
I hope you have understood this blog. Don't forget to like the blog and follow me.
Thankyou🩵
| akshat0610 | |
1,887,531 | The Reason Behind My Career Change: Why I Decided to Leave My Previous Job and Pursue Programming | Changing careers is a significant decision, and it's rarely an easy one. Many people find themselves... | 27,731 | 2024-06-13T17:28:14 | https://dev.to/palak/the-reason-behind-my-career-change-why-i-decided-to-leave-my-previous-job-and-pursue-programming-5bm7 | career, learning, watercooler, beginners | Changing careers is a significant decision, and it's rarely an easy one. Many people find themselves at a crossroads, questioning their current job and wondering if there's something more fulfilling out there. There are several common reasons why individuals decide to change careers and venture into the world of programming:
- **Lack of Job Satisfaction:** Many people feel unfulfilled in their current roles and seek a career that aligns more closely with their passions and interests.
- **Better Opportunities:** The tech industry offers numerous opportunities for growth, innovation, and financial stability, attracting those looking for a more promising future.
- **Desire for Flexibility:** Programming can offer flexible working conditions, including remote work, which is appealing to many.
- **Intellectual Challenge:** For those who love problem-solving and continuous learning, programming provides an intellectually stimulating environment.
While these reasons can be compelling, making a career change is not easy. It requires a lot of dedication, learning new skills, and sometimes starting from scratch. This journey demands resilience, patience, and a willingness to face and overcome challenges.
## My Personal Journey
For me, the decision to change careers was driven by a need for significant changes in my life. After my divorce, I realized that I needed to reevaluate my path and find something that would bring me true satisfaction and allow me to grow.
In my previous jobs, I often felt a lack of fulfillment. The work I was doing did not offer the opportunities for personal and professional development that I craved. I knew I had to make a change, but I wasn't sure what direction to take. My previous career paths had left me feeling stagnant, with no real prospects for growth or advancement. I wanted more from my professional life and needed to find a field that would challenge me and allow me to evolve.
Interestingly, my passion for technology started at a young age. As a teenager, I used to upload simple websites to the internet using FTP. Although my family thought I would become a builder, it wasn't until years later that I discovered my true calling: building applications. This realization was both a surprise and a revelation. The idea of constructing something new and innovative, even if it was digital, resonated deeply with me.
## Why Programming?
Choosing programming, and specifically Ruby, as my new career path was a decision born out of this rediscovered passion. Programming offered me the creative outlet I was looking for, and the ability to build something from scratch gave me a sense of accomplishment that I hadn't found in my previous roles.
Ruby, in particular, stood out to me because of its elegant syntax and supportive community. The language's focus on simplicity and productivity made it an ideal choice for someone like me, who was diving into a new field and needed a language that was both powerful and accessible.
## Overcoming Challenges
The journey hasn't been without its challenges. Learning to code and transitioning into a new industry required a lot of hard work and perseverance. There were times when I doubted my decision and wondered if I had made a mistake. The learning curve was steep, and the field of programming can be overwhelming for a newcomer.
However, I was fortunate to have the support of mentors and the programming community. Their guidance and encouragement played a crucial role in my development. They helped me navigate the complexities of coding and provided invaluable advice on how to advance in my new career.
## Finding Fulfillment
Today, I can say with confidence that making the switch to programming was one of the best decisions I've ever made. I now have a career that not only challenges me intellectually but also provides a sense of purpose and fulfillment. The satisfaction of solving complex problems and creating functional, elegant solutions is unparalleled.
## Giving Back
Now, it's time for me to give back to the community that has supported me throughout this journey. I owe a debt of gratitude to the mentors, colleagues, and friends who have helped me along the way. Through this blog, I hope to repay that debt by sharing my experiences and insights, and by helping others who are considering or undergoing a similar transition.
## Join the Conversation
If you're reading this and contemplating a career change, I encourage you to reflect on what truly fulfills you and where your passions lie. What are the reasons driving your desire for change? I'd love to hear your thoughts and experiences. Share your story in the comments below, and let's engage in a meaningful discussion about career changes, programming, and personal growth.
Stay tuned for more posts, and don't hesitate to leave comments or questions. I look forward to connecting with you!
Happy coding!
Mati | palak |
1,887,520 | IT441: RaspberryPi Stoplight | Overview The main purpose of this project was to learn the basics of developing software... | 0 | 2024-06-13T17:19:42 | https://dev.to/charlesrc019/it441-raspberrypi-stoplight-235h |
# Overview
The main purpose of this project was to learn the basics of developing software in an IoT environment by creating a wifi-controlled stoplight with a Raspberry Pi. The principles learned in this project are as follows.
- Setup and configure a Raspberry Pi for initial use.
- Develop non-blocking, multi-threaded code to complete multiple operations at the same time.
- Become familiar with using general purpose input-output (GPIO) pins.
# Materials
The physical materials used in this project are as follows.
- Personal Computer
- RaspberryPi 3+ (preconfigured to use)
- (1) Breadboard
- (1) Circuit-Printed Stoplight
- (1) RaspberryPi Jumper Cable Bus
# Resources
The software, services, and code libraries used in this project are as follows.
- Python 3
- Threading
- Time
- GPIO
- Flask
- UIKit
# References
The following guides and references were very useful in the completion of this project.
- **RaspberryPi.org** Create a basic website using Python and Flask.
- **ThePiHut** Basic interaction with the GPIO pins via Python.
- **StackOverflow** Create a separate thread in a Python script. And, exit a blocked thread in Python.
*State Machine 1*
*State Machine 2*
# Procedures
In the development environment of your choice (for me, this was an Azure VM running Visual Studio Code),
- Use the “write, test, modify, repeat” method of development to create a Python-based website to change the states of the stoplight. For simplicity, use a different URL path to specify each state of the stoplight. (I recommend using the Flask library. It made it very easy for me.)
- *Optional.* Implement UIKit elements into your website to make it pretty.
- *Optional.* Find images of stoplight states to use as visual indicators on your website.
Using your website as the input method, implement State Machine 1 in Python code.
- Build upon your new state machine to add an “automatic mode” where the stoplight will run on a timer. (State Machine 2) It is important that all blocking elements of this code run in a separate thread. The main thread should never be blocked as it will be running the website. (I accomplished this by using the time and threading libraries.)
To the best of your ability, add the necessary components to your code to interact with GPIO pins. (I made the pin numbers in my code global variables so that they could easily be changed on the Pi itself.)
On your RaspberryPi,
- Transfer over your already-created code and verify that it works. (I did this by reinstalling the Flask and Threading libraries to my Pi. Then, I transferred my code with the SFTP protocol.)
Connect your RaspberryPi to the breadboard, using your GPIO ribbon cable and cobbler.
- Add connect your stoplight LEDs to the breadboard, taking note of the pins that the lights are connected to. If you are using individual LEDs, make sure to add a resistor into the circuit before it connects to ground. (In my case, the resistors were built into the stoplight itself, so this was not needed.)
- Modify your code so that the pins specified for red, yellow, and green match those that the are connected on the board. Make sure to take note of whether or not you are using the Broadcom or GPIO specified numbers. By default, the GPIO library will use the GPIO numbers which inconveniently do not match those specified on the board. (In my case, I solved this problem by searching online for a Broadcom schematic of the GPIO pin numbers.)
If you’ve done everything correctly, you should now have a fully-functioning wifi-controlled stoplight.
# Appendix
## Thought Questions
- **What are some practical applications for a device like this?** Strictly speaking, a device exactly like this might not have a whole lot of practical application since it enables going directly from green to red without any delay. However, many devices somewhat similar to this could be and are used be city administrators to control traffic flow remotely.
- **What are some enhancements that could be made to this device?** The primary way to enhance this device would be to add functionality for a cross-street stoplight to work in tandem with the first stoplight. Also, a camera of proximity sensor could be added to this device to enable it to intelligently change from one state to another as needed.
- **How much time did it take to complete this project?** It took me about three hours to complete this specific project. (In my case, I had additional preparation and post-work that took me more time to complete.
# Code
All code for this project can be found in [my repo on GitHub](https://github.com/charlesrc019). | charlesrc019 | |
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1,887,517 | Big Text Animation on Scroll | Today, I embarked on an exciting journey with GSAP (GreenSock Animation Platform) and its powerful... | 0 | 2024-06-13T17:05:21 | https://dev.to/sarmittal/big-text-animation-on-scroll-bm2 | webdev, gsap, javascript, programming | Today, I embarked on an exciting journey with GSAP (GreenSock Animation Platform) and its powerful ScrollTrigger plugin. Here's a quick rundown of what I learned and how I brought my ideas to life.
## Basics of GSAP
GSAP is a robust JavaScript library for creating high-performance animations. I started by animating simple elements, which was surprisingly easy and effective.
## Discovering ScrollTrigger
ScrollTrigger, a GSAP plugin, allows you to animate elements based on scroll position. Here are some key properties:
- trigger: Select the element to animate.
- scroller: Usually set to "body".
- start: Define when the animation starts.
- end: Define when the animation ends.
- markers: Visualize start and end points (useful for debugging).
- scrub: Smoothly control animation with scroll (can be a Boolean or a number between 1-5).
- pin: Pin the element during the animation.
## My Big Text Animation
I created an engaging big text animation that moves as you scroll down the page. Here’s the code and a brief explanation:
```
gsap.to(".page2 h1", {
transform: "translateX(-250%)",
scrollTrigger: {
trigger: ".page2",
scroller: "body",
start: "top 0%",
end: "top -100%",
scrub: 2,
pin: true
}
});
```
```
<!DOCTYPE html>
<html lang="en">
<head>
<title>Big Scroll Text Animation</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="page1">
<h1>Welcome to Big Scroll Text Animation</h1>
</div>
<div class="page2">
<h1>BIG SCROLL ANIMATION</h1>
</div>
<div class="page3"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.5/gsap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.5/ScrollTrigger.min.js"></script>
<script src="script.js"></script>
</body>
</html>
```
```
* {
margin: 0;
padding: 0;
font-family: sans-serif;
}
html, body {
height: 100vh;
width: 100vw;
}
body {
overflow-x: hidden;
}
.page1, .page3 {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
width: 100vw;
}
.page1 { background-color: black; }
.page1 h1 { color: white; }
.page2 {
background-color: cornsilk;
height: 100%;
align-items: center;
}
.page2 h1 {
color: black;
font-size: 70vh;
font-weight: 400;
}
.page3 { background-color: black; }
```
You can see this animation in action here on CodePen.
{% embed https://codepen.io/Sarthakmittal/pen/ExzboRQ %}
Today was a fantastic learning experience, and I'm excited to continue exploring the capabilities of GSAP and ScrollTrigger. Stay tuned for more animations! | sarmittal |
1,887,516 | IT441: Arduino Stoplight | Overview The main purpose of this project was to optimize my previous distance stoplight... | 0 | 2024-06-13T17:03:17 | https://dev.to/charlesrc019/it441-arduino-stoplight-2e0c |
# Overview
The main purpose of this project was to optimize my previous distance stoplight by making network communication more lightweight and by adding power-saving functionality. Additional principles learned in this project are as follows.
- Implemented an MQTT event hub for publish/subscribe notifications between devices.
- Developed a communications protocol for devices across the event bus.
- Established more complex conditions for the actuator involving multiple sensors.
# Materials
The physical materials used in this project are as follows.
- Personal Computer
- Personal Cloud Server
- (3) Arduino WEMOS D1 mini
- (3) Breadboard
- (1) LED Stoplight
- (1) Ultrasonic Distance Sensor (HC-SR04)
- (1) Magnetic Door Switch Sensor
# Resources
The software, services, and code libraries used in this project are as follows.
- Arduino IDE
- C Libraries
- ESP8266WiFi
- WiFiManager
- PubSubClient
- NewPing
- Mosquitto MQTT Broker
# References
The following guides and references were very useful in the completion of this project.
- Bald Engineer. Detailed instructions on writing better MQTT callback functions.
- Instructables. Great explanation of using magnetic door sensors with Arduino. And nice overview of how to use the PubSub MQTT library with WifiManager on Arduino.
- Randon Nerd Tutorials. Troubleshooting guide for testing MQTT communications from the broker itself.
- Steve’s Internet Guide. Simple explanation of how to set up a MQTT server in the cloud.
# Procedure
## Part 1: Setup a MQTT Broker
My last project was a success, but using HTTP to communicate between devices was ridiculously slow. So, I used MQTT for this project. The main benefit of doing this was that it offloaded the complexity of managing the network connections to a more adept/powerful device.
Find a computer that you can use as your MQTT broker. The broker is basically the gateway for all your MQTT communications, so it will need to 1) have a semi-permanent network address and 2) be reachable by all the IoT devices that you might want to connect. In my project, I used the Moqsuitto MQTT broker, which also requires 3) a multi-threaded operating system.
Install your MQTT broker and integrate into your IoT devices. The exact “hows” of doing this depend a lot on the computer that you chose in step 1. In my case, I used a virtual Linux server in Microsoft Azure. The install process was fairly simple; it involved running a couple of commands and opening port 1883 to the public.
```sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
sudo apt-get update
sudo apt-get install mosquitto
sudo apt-get install mosquitto-clients```
Installing MQTT on Arduino. You need to take note of the network address with which your broker can be reached. The easiest way to do this is by creating a public DNS record that will point to your broker, regardless of where it is. (In my case, this was easy because Azure provides a customizable public DNS record.) If that’s not feasible for you, try setting an assigned/static IP that will be easy for you to remember.
## Part 2: Create a Door Sensor
Here’s another improvement on my last project. If my distance stoplight was actually used in a garage, it wouldn’t need to be doing anything most of the time; it would only be needed for a few minutes while someone is parking their car. So, in an attempt to save power, this project also includes a door sensor that will put the other devices to sleep when it reports that the garage door has been closed.
1. Wire the door sensor to interface with Arduino. Most door sensors are very simple; they take voltage from one end and allow/don’t allow it to pass to the other end. Therefore, one wire from the sensor needs to be connected to a known, constant signal and other end to an input pin. (In my case, I used D8/GPIO15 and the 3.3 voltage pin, so as to avoid complications from using ground and needing a pull-down resistor.)
2. Code the door sensor functionality. This device is relatively simple to use, but for the inter-device communication you’ll need to add quite a few more components. Functionality-wise, this is the order of how you’ll want to stand-up the various functionalities in your code.
3. Serial console connectivity. Absolutely essential for development troubleshooting. The commands are Serial.begin(FREQ) to set it up and Serial.println("text") to print text to the console.
Door sensor functionality. Before you get into all the network connection mumbo-jumbo, get the main functionality of this device figured out. Instructables has a great guide on using door sensors with Arduino.
4. WiFi connectivity. A Google search will find you tons of guides on how to do this. If you want, you can also reference my guide on doing this for the WEMOS D1 mini as part of my simple stoplight project.
5. MQTT connectivity. Again, this is very common and can readily be found online; Instructables has a great explanation of how to do this.. Basically, you’ll need to have two basic functions for this specific device: a connection/reconnection function that will handle connecting to your broker (Remember that semi-permanent network address? You’ll need to use that here.) and a publish function that will transmit changes in the door sensor’s state.
## Part 3: Create a Distance Sensor
Wire the ultrasonic distance sensor to interface with Arduino. If you need more information on this, take a quick peek at how I did it in my distance stoplight project. Remember, the sensor performs best when it is connected to 5 volts, instead of 3.3 volts.
Code the distance sensor functionality. This will also be a lot like the code in my distance stoplight project. Since this project uses MQTT, the distance sensor device will need to handle the state changes between distance ranges itself, instead of providing distance information upon request from other devices. In general, this is how you’ll want to build/rebuild your distance sensor functionality.
1. Serial console connectivity.
2. Distance sensor functionality. As mentioned above, this functionality not only needs to read distance information from the sensor, but also move the sensor between the different distance distance range states to indicate green, yellow, red, or too close.
3. WiFi connectivity.
4. MQTT connectivity. On this device, you’ll need three functions for MQTT communications: a connection/reconnection function, a state publish function, and a callback/”message received” function to change the sensor sleep state based on information from the door sensor. Bald Engineer has a great tutorial on how to use and respond to MQTT callbacks.
Power-saving functionality. Basically, all that needs to be done here is to build a option in your infinite loop that will stop the ultrasonic sensor from sampling distances until the door sensor reports that it is open again.
## Part 4: Create the Stoplight
Wire the stoplight to interface with Arduino. The best way to do this is probably to wire each specific light and ground. (In my case, I took the lazy route and connected it in a spot on the board where the the pins were already lined up in the order I needed. The only caveat to this was that changing the stoplight’s colors also changed built-in LED’s state.)
1. Code the stoplight functionality. Here’s a overview of what you’ll need to do to get this functionality up and running. (In my case, I just trimmed down my stoplight code from previous projects since I off-loaded a lot of the functions to MQTT and the distance sensor itself.)
2. Serial console connectivity.
3. WiFi connectivity.
4. MQTT connectivity. You’ll only need two functions for MQTT communications: a connection/reconnection function and a callback function to change the stoplight state and the sleep state.
Stoplight functionality. Unlike the previous two devices, the stoplight’s functionality can only come after implementing MQTT because it relies on the state information that it gets there in order to change the lights.
Power-saving functionality.
# Appendix
## FAQ
- **I installed Mosquitto, but none of my devices are able to connect to it.**
First, verify that Mosquitto is running. On Linux, the following commands will report the status of the Mosquitto broker and enable it to automatically run on system startup, if wanted. Next, test the network connection to your broker; try pinging it. (You may need to open your firewall to ICMP requests in order for this to work.) If neither of those suggestions finds the problem, it is most likely in your code. Time to pull out your bug-finding glasses!
```sudo service mosquitto status
sudo systemctl enable mosquitto.service```
- **The code inside my infinite loop function is getting ridiculously complicated. Help!**
One of the main differences between programming for Arduino and other types of coding is that the code we are writing is essentially for a single-function state machine. Therefore, the common advice about not using global variables goes out the window; global variables are your states! To avoid complicated code, define all the states that you’ll need to keep track of as global variables. Then, write seperate functions that will update your global variables or respond to updates. Put as little in you infinite loop function as possible, and instead call your functions as needed.
## Thought Questions
- **How does the communication between devices change with the shift to using an MQTT event hub? How does this facilitate greater scalability?** Using an MQTT event hub has a huge impact on the overall scalability of IoT projects. As mentioned before, using MQTT offloads all of the details of device communication to a single computer. Each individual device no longer needs to keep track of other IP addresses, serialize/deserialize data, or implement network timeout conditions; the MQTT broker handles all of that and does its best to guarantee that messages are delivered. Therefore, it is much easier to scale projects because each device’s functionality doesn’t need to change or improve. Communication limits can be reduced simply by modifying the broker.
- **What things did you do to learn to use MQTT?** The most useful thing to me in learning MQTT was a live demonstration I saw. In the demonstration, several Arduinos turned on/off their LEDs based on the messages sent to them from the command line of the MQTT topic publisher. Having no previous MQTT experience, just simply watching the MQTT traffic and the responses to it was an excellent way for me to learn how to incorporate MQTT into IoT devices.
- **What are strengths and weaknesses of the direct communication between the sensor and actuator? What are strengths and weaknesses of the event hub? Which do you feel is better for this application?** The strengths and weaknesses of MQTT versus direct communication can be summarized in the pros/cons of star versus mesh networks. MQTT event hubs are good because they reduce complexity and allow for a single point of upgrade, but on the downside they require an extra device and inherently have an single point of failure. Direct communication, however, is more complex but doesn’t have a single point of failure or require extra devices. (In my opinion, choosing the best option for an application like this rides on whether or not there are outside devices that I also want to hook into my MQTT broker. If there are, building/maintaining an MQTT broker would probably be worth it. Otherwise, it would be way to much overhead for this very simple task.)
- **What was the biggest challenge you overcame in this project?** Completing this project required me to really dive down and figure out how to use char array like I never have before. Due to my C++ background, I am used to an easier way of managing strings, but the data provided by the MQTT functions was all char arrays. Thanks to MQTT tutorials mentioned above, I eventually got it figured out with the strcmp() and String.indexOf() functions.
- **How much time did it take you to complete this project?** I was able to adapt a fair amount of code from my previous projects for use in this project, so it only took me about 4 hours to complete. After that, I spent an additional 4 hours writing this report.
# Code
All code for this project can be found in [my repo on GitHub](https://github.com/charlesrc019). | charlesrc019 | |
1,887,515 | Estudos em Quality Assurance (QA) - HTTP e API | HTTP Requests: são como pedidos que um navegador faz a um servidor para acessar páginas da web ou... | 0 | 2024-06-13T17:00:23 | https://dev.to/julianoquites/estudos-em-quality-assurance-qa-http-e-api-54on | api, http, qa, testing | **HTTP Requests:** são como pedidos que um navegador faz a um servidor para acessar páginas da web ou dados específicos. É basicamente como você "pede" algo da internet.
**HTTP Status Codes:** são basicamente códigos que um servidor envia para dizer se sua solicitação deu certo, deu algum erro ou se algo deu errado no servidor. Alguns dos status codes mais encontrados em QA:
**2xx - Bem-sucedidos:**
- **200 - OK:** A solicitação foi bem-sucedida.
- **201 - Created:** A solicitação foi bem-sucedida e resultou na criação de um novo recurso.
**4xx - Erros do Cliente:**
- **400 - Bad Request:** A solicitação do cliente não pôde ser entendida pelo servidor devido à sintaxe incorreta.
- **401 - Unauthorized:** O cliente deve se autenticar para obter a resposta solicitada.
- **403 - Forbidden:** O cliente não tem permissão para acessar o recurso solicitado.
- **404 - Not Found:** O servidor não pôde encontrar o recurso solicitado.
**5xx - Erros do Servidor:**
- **500 - Internal Server Error:** Um erro interno do servidor impediu a solicitação.
- **502 - Bad Gateway:** O servidor recebeu uma resposta inválida.
- **503 - Service Unavailable:** O servidor não está pronto para manipular a solicitação devido a sobrecarga temporária ou manutenção do servidor.
**API (Interface de Programação de Aplicativos** ou **Application Programming Interface):** é como um conjunto de regras que permite que diferentes aplicativos se comuniquem e compartilhem informações entre si. É como uma linguagem comum que diferentes programas podem entender para trocar dados e funcionalidades.
**Métodos:**
- **GET:** Recupera dados.
- **POST:** Cria um novo recurso.
- **PUT:** Atualiza ou substitui um recurso existente.
- **DELETE:** Remove um recurso.
- **PATCH:** Atualiza parcialmente um recurso.
| julianoquites |
1,887,215 | How I became a Software Engineer and how it’s going. | Hello Devs! Today I’d like to share with you my story of how I became a software engineer, how it’s... | 0 | 2024-06-13T17:00:00 | https://dev.to/rob097/how-i-became-a-software-engineer-and-how-its-going-5cj7 | webdev, softwareengineering, learning | Hello Devs! Today I’d like to share with you my story of how I became a software engineer, how it’s going, and why I love this profession so much.
## The beginning
First, I’ll give you a little context. I’m from a small town in the north of Italy, in the middle of the Dolomites, and I come from a family where, for generations, everyone worked in the family shop.
So just thinking about university was something very new at home. Anyway, I always liked computer science and technicalities, so I decided to enroll in a new university course called “**Information Engineering and Business Organization**.”. I was never a genius in school, and so every exam was very stressful and hard. I liked the course, but I didn’t have the slightest idea of what I was going to do once I finished until the second year started.
“**Software Engineering**” was the name of the class I had to attend, and this class put me on the *right path*, but definitely with the *wrong approach*.
The theory was extremely boring, and the practical part was almost nonsense for me, and I had **zero** knowledge of programming. I say this because the practical part was to create, from zero, a web application that managed clients and orders (classic school projects) with Ruby on Rails.
Now, when I say zero knowledge, I really mean zero. I didn’t even know that websites were made with code, and I definitely didn’t know what coding was.
So anyway, I started this project, and after a couple of days of setup, I started understanding how it worked. There were text elements and buttons, and you could change color and stuff. Only after some days I understood that I wasn’t doing a single thing in Ruby, nor was I using the Rails framework (which, by the way, I didn’t know what that was), I discovered HTML!! And it was FUN! Especially when I found out about CSS. After learning some basic uses of JavaScript, the course ended and the exam didn’t go very well, as you may imagine, but I really had some fun.
## My first side project
As I said earlier, my family runs a shop from generation to generation, and since I had acquired this new super knowledge of HTML, CSS and JS, I wanted to create a new simple website for the shop, which didn’t exist at the time. After some time, I did create a sort of website that was very ugly in that 2000s style, with bright flashing colors and low-quality images. I was so proud of my job. But then the first big problem came along. I wanted to add a “Contact Us” section to the website. Reading online how to do such a thing, I started to read a very obscure and terrifying word: “**Back End**”. *What the heck is a beck-end?* - I thought. That answer came with another university course I had to attend, “Web Programming.”.
## The turning point
In this course, we had to create an entire web application to manage a shopping list with geolocation, internationalization and other stuff I had no clue how to do. All the application had to be done in Java, with the user interface in JSP.
Fortunately, with this course, we received some training, and I learned so many things in such a short time that I felt invincible. I and another couple of friends managed to complete the application, which ended up being very well-designed and well-implemented.
Ok, so now, not only did I know what a back-end was, but I also knew what design patterns were, how to use a database, and so many other things that I decided to re-create the shop website but with an E-Commerce in it.
If I remember correctly, it was 2016, and I knew there were platforms like WordPress or Shopify to build ecommerce, but I just learned so many things I wanted to practice as much as possible, so I decided to build it in Java with JSP pages and with handmade listeners and filters and servlets, and so on and so forth. So no, I didn’t know anything about Spring. This took a LOT of time. But in the end, not only did I practice a lot, but the final result was very, very good. I created the whole e-commerce site with a blog section and also a dashboard to create products, manage clients, write articles and collect statistics. Talking with the bank of the shop, I discovered they had a custom integration for online payments, so I also had to implement a secure integration with their systems. And once I completed this, the website was finally complete. Or at least, this is what I thought. Something that was way harder than I thought was the hosting of the website. I had a working web application that I didn’t know how to host. After a while, I found a platform that let me connect a domain and upload a .war file, so I used that solution for some time.
Of course, this was fun from an academic point of view, but it wasn’t really manageable. Every change required a lot of time to develop. So once I made peace with myself, I decided to archive this project and replicate it on WordPress with WooCommerce. It definitely took a lot less time, and the UI was a lot better. I also used some plugins to improve the performance of the website, the SEO and the UX.
Once the WordPress website was ready, I immediately realized something. The Java e-commerce I made was FAST. And I really mean fast. There was almost no loading time in any case.
## How is it going
Since then, I have worked on many different side projects, learning spring and spring boot and many other different technologies in both the back end and front end, and learning a lot about DevOps and databases.
In September 2020, I finally graduated and after 3 months, I started looking for a job.
I immediately got hired by a big corporate in the healthcare field, where I learned a lot of new things, especially how to work with a team of professionals, which I didn’t know anything about it.
After two years, I decided to move on, and I switched to a small startup in the finance and web3 market, where I currently work.
My current side project is a microservice / microfrontend project with Java and React deployed on Docker containers orchestrated by Kubernetes. So I think that for someone who started this journey thinking that HTML was actually Ruby on Rails and didn’t know what “beck end” meant, I made quite a lot of progress.
This project is a platform for professionals and students to create their own portfolio with a story-telling approach. I never liked portfolios that showcased a list of project names with complex words without explaining anything. I wanted to narrate my projects, explaining every choice I made and every success and problem I had during their development.
An MVP is on its way, so if you are curious to see it, stay tuned 😉
---
If you got here, you understand why I love this profession so much. Every single time you think you finally figured it out, and you finally know how things work, something completely new runs over you, resetting all the confidence you acquired. It's almost like a video game. Every time you complete a level, a new one appears, and it's bigger and harder than the previous one, but you are more prepared and more wise. | rob097 |
1,887,514 | Top Java Development Firms: 2024's Best | In the dynamic software development arena, Java has been a fundamental technology for over two... | 0 | 2024-06-13T16:57:24 | https://dev.to/twinkle123/top-java-development-firms-2024s-best-2pnd | java, devops, development, webdev | In the dynamic software development arena, Java has been a fundamental technology for over two decades, crucial for applications from Spotify to Android OS. Its adaptability and robustness, especially in microservices architecture and cloud-native development, make it ideal for scalable solutions. Here, we highlight the leading companies in [Java development](https://www.clariontech.com/hire-developers/hire-java-developers), examining their unique strengths, notable projects, and why they are trusted partners in the industry.
#1. Clarion Technologies
Clarion Technologies stands out for its strategic [Java solutions](https://www.clariontech.com/java-development-services), leveraging frameworks such as Git and Spring Framework 6.0. Based in Pune and Ahmedabad, India, Clarion excels in application testing, custom software development, enterprise app modernization, e-commerce, and mobile app development. Their combination of competitive pricing and a skilled workforce solidifies their position as a leader in innovative Java development.
#2. NextAge
NextAge, from Paranavai, Brazil, is a nearshore IT solutions provider known for cutting-edge technology and agile processes. Specializing in custom software development, IT staff augmentation, web development, and mobile app development, NextAge delivers tailored Java solutions to meet specific client needs at competitive rates.
#3. Dotsquares
Headquartered in Albourne, UK, Dotsquares offers a comprehensive range of Java solutions integrating design, development, marketing, and support. Their services include AI development, blockchain, CRM consulting, web development, custom software development, e-commerce, IT managed services, cloud consulting, ERP consulting, and mobile app development. This holistic approach ensures that businesses of all sizes find the solutions they need.
#4. Scalo
Located in Kraków, Poland, Scalo excels at transforming business ideas into high-performance applications using Java. Their services include custom software development, IT managed services, web development, and IT staff augmentation. Scalo’s expertise ensures scalable and impactful software solutions, making them a reliable partner for various business needs.
#5. Altkom Software & Consulting
Altkom Software & Consulting, with over 20 years of experience, offers customized Java solutions from their Warsaw, Poland base. They specialize in custom software development, cloud consulting, web development, enterprise app modernization, and mobile application development. Altkom’s extensive experience and moderate pricing make them a trusted choice for tailored Java solutions.
#6. Edvantis
Headquartered in Berlin, Germany, Edvantis aligns its resources strategically with client initiatives, offering a broad spectrum of Java development services. These include ERP consulting, IT managed services, CRM consulting, BI & Big Data consulting, IT staff augmentation, web development, and custom software development. Edvantis’s comprehensive services ensure effective support for various business needs.
#7. Infinum
Infinum, based in New York, partners with innovative organizations to provide technological solutions that drive business growth. They offer high-end services in custom software development, web development, [mobile app development](https://www.clariontech.com/hire-developers/hire-mobile-app-developer), BI & Big Data consulting, and UX/UI design. Their premium offerings cater to businesses seeking advanced technological solutions.
#8. Intetics Inc.
Intetics Inc., located in Naples, FL, employs its Predictive Software Engineering [framework](https://www.clariontech.com/hire-developers/hire-java-developers) to deliver precise Java development services. Their extensive range of services includes custom software development, IT managed services, IT staff augmentation, web development, AI development, and cloud consulting. Intetics’s structured approach ensures efficient and accurate project delivery.
#9. IntexSoft
IntexSoft, based in Wrocław, Poland, focuses on end-to-end software solutions with a strong emphasis on Java. Their offerings encompass custom software development, e-commerce development, and web development. IntexSoft’s dedication to Java ensures comprehensive and tailored solutions to meet client needs.
#10. Sapphire Software Solutions
Sapphire Software Solutions, based in Ahmedabad, India, excels in high-end technology solutions with an emphasis on best practices in Java development. Their wide range of services includes blockchain, cloud consulting, custom software development, e-commerce development, BI & Big Data consulting, IT staff augmentation, AI development, mobile app development, web development, and SEO. Their competitive pricing and extensive offerings make them a preferred partner for many businesses.
These companies exemplify Java's versatility and robustness, showcasing its relevance in developing scalable and resilient applications. Their expertise and strategic approaches position them as leaders in [Java development](https://www.clariontech.com/hire-developers/hire-java-developers). | twinkle123 |
1,887,513 | What makes this ultimate gaming platform for mobile gamers? | This Gaming Platform has emerged as the go-to gaming platform for mobile enthusiasts, offering an... | 0 | 2024-06-13T16:57:14 | https://dev.to/claywinston/what-makes-this-ultimate-gaming-platform-for-mobile-gamers-4g3b | gamedev, mobilegames, gamingplatform, games | This [Gaming Platform](https://medium.com/@adreeshelk/nostra-games-how-to-play-many-games-on-your-lock-screen-without-downloading-anything-c66b56cfb175?utm_source=referral&utm_medium=Medium&utm_campaign=Nostra) has emerged as the go-to gaming platform for mobile enthusiasts, offering an unparalleled experience that combines convenience, quality, and innovation. As a top-tier [gaming platform](https://nostra.gg/articles/Lock-Screen-Games-Are-a-Game-Changer-for-Gaming-Developers.html?utm_source=referral&utm_medium=article&utm_campaign=Nostra), This Gaming Platform stands out by seamlessly integrating games into the lock screen of Android devices, eliminating the need for downloads and making gaming more accessible than ever. With a vast library of high-quality titles spanning various genres, from classic puzzles to action-packed adventures, this gaming platform caters to diverse gaming preferences. This Gaming Platform's commitment to delivering visually stunning graphics, engaging gameplay, and smooth performance sets it apart as a premier gaming platform. Moreover, This [Gaming Platform ](https://medium.com/@adreeshelk/playground-of-nostra-gaming-adventure-9e9828101d85?utm_source=referral&utm_medium=Medium&utm_campaign=Nostra)fosters a vibrant gaming community, allowing players to connect, compete, and showcase their achievements through leaderboards and social features. By combining convenience, quality, and social engagement, This Gaming Platform has redefined the mobile gaming landscape, solidifying its position as the ultimate gaming platform for enthusiasts seeking the best in mobile entertainment. | claywinston |
1,887,512 | SCAMMED CRYPTOCURRENCY RECOVERY EXPERT COMPANY ⁚ DIGITAL HACK RECOVERY | In cryptocurrency trading, finding trustworthy guidance can be like searching for a needle in a... | 0 | 2024-06-13T16:57:01 | https://dev.to/elijah_miller_7a934e2581d/scammed-cryptocurrency-recovery-expert-company-digital-hack-recovery-4kjc | In cryptocurrency trading, finding trustworthy guidance can be like searching for a needle in a haystack. My journey took a treacherous turn when I crossed paths with "Miss Anne," who, with her impressive online presence, seemed like a beacon of financial wisdom. Little did I know, her promises were but a facade, leading me into a labyrinth of deceit and despair. In mid-March, armed with USD 57,000, I embarked on my cryptocurrency trading venture under Miss Anne's tutelage. Her LinkedIn profile boasted an impressive 450,000+ connections, while her Instagram account flaunted a following of over 50,000, instilling unwavering trust in her purported expertise. With her persuasive rhetoric, she convinced me to set up a Metamask wallet and deposit my funds, emphasizing the stability of USDT in safeguarding my investment portfolio against depreciation. Naively believing every word she uttered, I eagerly plunged into the world of cryptocurrency trading. Initially investing $29,000, Miss Anne assured me that this was merely the tip of the iceberg, advocating for larger trades with promises of astronomical profits. Despite my reservations and insistence on waiting for the completion of the initial trade, she urged me to dive headfirst into more substantial transactions, assuring me of even greater returns. With bated breath, I awaited the culmination of our agreed-upon 3-week trading period, anticipating the fruits of my labor to materialize in my wallet linked to the trading website. However, as the days turned into weeks, my hopes dwindled as no funds appeared. Desperate for answers, I confronted Miss Anne, only to be met with evasions and excuses. It was then that the harsh reality of my predicament dawned upon me. Miss Anne revealed that my account had not only failed to yield profits but had accrued over $100,000 in taxes and charges, plunging it into negative territory. Refusing to accept defeat, I refused to pay the exorbitant fees and sought solace in the arms of Digital Hack Recovery. Armed with transaction details I reached out to Digital Hack Recovery, entrusting them with the daunting task of reclaiming my lost investments. With unwavering determination, they embarked on a meticulous 3-day recovery process, navigating through the intricate web of blockchain transactions with precision and expertise. Their dedication bore fruit as my funds were miraculously restored to my wallet, fulfilling their promise of financial redemption. If not for Digital Hack Recovery's timely intervention, I shudder to think of the dire financial consequences I would have faced. In a realm fraught with scams and deceit, Digital Hack Recovery stands as a bastion of integrity and reliability. Their track record of success and unwavering commitment to their clients make them an indispensable ally in the fight against financial injustice. If you find yourself in the clutches of online fraud or deceit, do not despair. Trust in Digital Hack Recovery to lead you out of financial restoration. Your solution is here, and it goes by the name of Digital Hack Recovery.
Their Email; digitalhackrecovery@techie.com
Website; https://digitalhackrecovery.com | elijah_miller_7a934e2581d | |
1,887,713 | Cursos De Front-End E Back-End Para Mulheres Gratuitos | O projeto PrograMaria oferece cursos de programação, pelo Eu Progr{amo}, projetados especialmente... | 0 | 2024-06-23T13:50:25 | https://guiadeti.com.br/cursos-front-end-back-end-mulheres-gratuitos/ | bolsas, backend, cursosgratuitos, frontend | ---
title: Cursos De Front-End E Back-End Para Mulheres Gratuitos
published: true
date: 2024-06-13 16:55:09 UTC
tags: Bolsas,backend,cursosgratuitos,frontend
canonical_url: https://guiadeti.com.br/cursos-front-end-back-end-mulheres-gratuitos/
---
O projeto PrograMaria oferece cursos de programação, pelo Eu Progr{amo}, projetados especialmente para mulheres iniciantes em tecnologia, abrangendo tanto front-end quanto back-end.
Tendo o compromisso de tornar o campo tecnológico mais diverso e inclusivo, a PrograMaria proporciona bolsas de estudo para aquelas que não têm condições de arcar com os custos dos cursos e estão determinadas a aprender programação.
Um processo seletivo é estabelecido para garantir que as bolsas sejam concedidas a quem realmente precisa do apoio financeiro, maximizando o impacto e a justiça do programa.
Todos os cursos são oferecidos em um formato 100% online e assíncrono, permitindo que as participantes estudem conforme suas próprias rotinas. Adicionalmente, todo o conteúdo do curso permanece acessível por 60 dias após a matrícula, facilitando o aprendizado no ritmo de cada estudante.
## Eu Progr{amo}
O Eu Progr{amo} oferece cursos especializados em programação para mulheres que estão iniciando na tecnologia, focando em áreas de front-end e back-end.
_Imagem da página do curso_
Comprometida com a promoção da diversidade e inclusão no setor tecnológico, a PrograMaria disponibiliza bolsas de estudo para candidatas que realmente não possuem condições financeiras de arcar com os custos dos cursos.
### Estrutura e Acesso aos Cursos
Todos os cursos Eu Progr{amo} são conduzidos online na plataforma Thinkific, dando flexibilidade para que as alunas possam estudar de acordo com suas próprias rotinas.
Os conteúdos dos cursos, que incluem vídeos gravados, textos, atividades práticas e exercícios, ficam disponíveis por 60 dias após a matrícula, facilitando o aprendizado assíncrono.
A plataforma permite interação com tutoras e outros alunos através de fóruns, enriquecendo a experiência educacional.
### Conteúdo Trabalhado
#### Minha primeira página web!
- HTML,
- CSS,
- JavaScript
- Lógica de Programação.
#### Minha primeira API!
- Back-End;
- JavaScript ;
- VS Code;
- Node.JS.
- Pensamento computacional;
- Métodos HTTP (GET, POST, PATCH, DELETE);
- Banco de Dados;
- CRUD (Create, Read, Update, delete).
### Meu primeiro site responsivo!
- HTML;
- CSS;
- JavaScript.
### Processo Seletivo para Bolsas de Estudo
A PrograMaria estabeleceu um processo seletivo rigoroso para a concessão de bolsas, assegurando que o auxílio seja oferecido a quem realmente precisa.
Os detalhes e critérios deste processo podem ser encontrados no Regulamento das Bolsas, disponível na página do programa, disponível no link ao final da página.
A PrograMaria solicita que as bolsas sejam requeridas somente por aquelas que não têm condições de pagar pelo curso, para poder garantir uma distribuição justa e eficaz dos recursos disponíveis.
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<span>Cursos de Robótica, Arduíno, Francês E Outros Temas Gratuitos</span> <a href="https://guiadeti.com.br/cursos-de-robotica-arduino-ia-idiomas/" title="Cursos de Robótica, Arduíno, Francês E Outros Temas Gratuitos"></a>
</div>
</div>
<div>
<div>
<div>
<span><img decoding="async" width="280" height="210" src="https://guiadeti.com.br/wp-content/uploads/2024/06/Front-End-E-Back-End-280x210.png" alt="Front-End E Back-End" title="Front-End E Back-End"></span>
</div>
<span>Cursos De Front-End E Back-End Para Mulheres Gratuitos</span> <a href="https://guiadeti.com.br/cursos-front-end-back-end-mulheres-gratuitos/" title="Cursos De Front-End E Back-End Para Mulheres Gratuitos"></a>
</div>
</div>
<div>
<div>
<div>
<span><img decoding="async" width="280" height="210" src="https://guiadeti.com.br/wp-content/uploads/2024/04/Harvard-2024-280x210.png" alt="" title=""></span>
</div>
<span>Curso Gratuito de Ciência da Computação de Harvard Traduzido</span> <a href="https://guiadeti.com.br/curso-traduzido-ciencia-da-computacao-harvard/" title="Curso Gratuito de Ciência da Computação de Harvard Traduzido"></a>
</div>
</div>
<div>
<div>
<div>
<span><img decoding="async" width="280" height="210" src="https://guiadeti.com.br/wp-content/uploads/2024/02/Bootcamp-De-SC-900-280x210.png" alt="Bootcamp De SC-900" title="Bootcamp De SC-900"></span>
</div>
<span>Bootcamp De SC-900 Gratuito Da Green Tecnologia</span> <a href="https://guiadeti.com.br/bootcamp-sc-900-gratuito-green-tecnologia/" title="Bootcamp De SC-900 Gratuito Da Green Tecnologia"></a>
</div>
</div>
</div>
</aside>
## Front-End
O desenvolvimento front-end refere-se à prática de criar a interface e a experiência do usuário de um site ou aplicativo, ou seja, tudo com o que o usuário interage diretamente.
É uma área fundamental da programação web e móvel, pois determina como os visitantes percebem e interagem com um produto digital. Os desenvolvedores front-end trabalham na linha de frente do desenvolvimento web, traduzindo designs e conceitos em realidade virtual funcional.
### Linguagens de Programação
As três pedras fundamentais do desenvolvimento front-end são HTML, CSS e JavaScript. HTML (HyperText Markup Language) é usado para estruturar conteúdo na web, CSS (Cascading Style Sheets) é utilizado para controlar o layout e estilo de um site, e JavaScript é empregado para adicionar interatividade às páginas web.
Essas tecnologias são complementadas por uma variedade de frameworks e bibliotecas como React, Angular e Vue.js, que ajudam a acelerar o processo de desenvolvimento e oferecem funcionalidades robustas para criar aplicações ricas e interativas.
### Ferramentas de Design e Prototipagem
Os desenvolvedores front-end frequentemente utilizam ferramentas de design como Adobe XD, Figma e Sketch para construir protótipos e refinar interfaces.
Essas ferramentas permitem uma colaboração efetiva entre designers e desenvolvedores, garantindo que a visão final do produto seja esteticamente agradável e funcionalmente eficaz.
### Responsividade e Acessibilidade
Um dos maiores desafios para os desenvolvedores front-end é garantir que os websites e aplicativos funcionem bem em uma ampla variedade de dispositivos e tamanhos de tela, o que é conhecido como design responsivo.
A acessibilidade na web é outra preocupação crítica, exigindo que os sites sejam utilizáveis por pessoas com diferentes habilidades e deficiências.
Implementar práticas de design e desenvolvimento inclusivas não só amplia o alcance de um produto, mas também atende a importantes padrões éticos e legais.
### Performance e Otimização
O desempenho de um site pode ter um impacto significativo na experiência do usuário e na eficácia do site como ferramenta de negócios.
Desenvolvedores front-end devem usar técnicas de otimização como minificação de código, compressão de imagens e lazy loading para melhorar os tempos de carregamento e a eficiência do site.
## PrograMaria
PrograMaria é uma iniciativa inovadora que surgiu com o objetivo de diminuir a desigualdade de gênero no setor tecnológico, incentivando e apoiando mulheres a entrarem e se estabelecerem na área de programação.
Desde o seu início, o projeto tem sido fundamental na transformação da paisagem tecnológica, proporcionando recursos, treinamento e uma comunidade de apoio para mulheres interessadas em tecnologia.
### Origem e Evolução
O projeto PrograMaria foi fundado por mulheres entusiastas da tecnologia que reconheceram a necessidade de mais representatividade feminina na indústria.
Elas perceberam que muitas mulheres se sentiam intimidadas ou deslocadas no campo dominado por homens e lançaram o PrograMaria como uma solução direta para esses desafios.
O objetivo era criar um ambiente acolhedor e inclusivo onde mulheres pudessem aprender, crescer e prosperar na tecnologia.
### Crescimento e Impacto
Ao longo dos anos, o PrograMaria evoluiu de workshops e pequenos encontros para uma plataforma robusta que oferece cursos, mentorias, eventos e uma forte comunidade online.
### Programas e Atividades do PrograMaria
PrograMaria oferece uma variedade de cursos que vão desde introdução à programação até tópicos mais avançados, como desenvolvimento front-end e back-end.
### Comunidade e Suporte
O PrograMaria construiu uma comunidade vibrante que serve como uma rede de suporte para suas integrantes. Através de eventos, fóruns online e grupos de discussão, as participantes encontram um espaço seguro para compartilhar experiências, desafios e conquistas.
## Link de inscrição ⬇️
As [inscrições para os cursos de front-end e back-end](https://www.programaria.org/cursos-programaria/) devem ser realizadas no site do PrograMaria.
## Descubra os cursos do PrograMaria e compartilhe a oportunidade de transformar carreiras!
Gostou do conteúdo sobre a formação em programação gratuita? Então compartilhe com as amigas!
O post [Cursos De Front-End E Back-End Para Mulheres Gratuitos](https://guiadeti.com.br/cursos-front-end-back-end-mulheres-gratuitos/) apareceu primeiro em [Guia de TI](https://guiadeti.com.br). | guiadeti |
1,887,511 | Deam Machine AI: high-quality videos from text & image | Dream Machine AI can create high-quality videos from simple text prompts, enabling companies and... | 0 | 2024-06-13T16:54:27 | https://dev.to/christianhappygo/deam-machine-ai-high-quality-videos-from-text-image-1ib0 | ai, sora, aivideo |
[Dream Machine AI](https://www.dreammachine-ai.com/) can create high-quality videos from simple text prompts, enabling companies and creators to produce original video content within minutes.
Dream Machine is accessible to everyone starting today. Users need to provide detailed prompts to generate videos, such as “a cute Dalmatian puppy running after a ball on the beach at sunset,” resulting in a realistic five-second clip produced within two minutes.
The text-to-video generation field is highly competitive, with rivals like OpenAI's Sora and Lightricks' LTX Studio offering similar capabilities. However, [Dream Machine AI](https://www.dreammachine-ai.com/) stands out with its open-source approach, allowing broader access and fostering a community of developers and creators.
Early beta testers praise Dream Machine for its ability to accurately render specific objects, characters, and environments, maintaining coherent storytelling and fluid motion. Despite challenges in recreating natural movements and handling text, Deam Machine AI's demos showcase impressive realism.
[Dream Machine AI](https://www.dreammachine-ai.com/) aims to integrate with creative tools like Adobe through future APIs and plugins. While facing legal and ethical challenges, the rapid progress of generative AI highlights its potential to revolutionize content creation. | christianhappygo |
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