id int64 5 1.93M | title stringlengths 0 128 | description stringlengths 0 25.5k | collection_id int64 0 28.1k | published_timestamp timestamp[s] | canonical_url stringlengths 14 581 | tag_list stringlengths 0 120 | body_markdown stringlengths 0 716k | user_username stringlengths 2 30 |
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1,882,039 | Where To Watch India vs Pakistan T20 World Cup Live In USA {Online} | Where To Watch India vs Pakistan T20 World Cup? If you want to catch the highly anticipated T20 World... | 0 | 2024-06-09T12:07:06 | https://dev.to/rameshchand/where-to-watch-india-vs-pakistan-t20-world-cup-live-in-usa-online-1okd | indiavspakistan, t20worldcup, usa, java | Where To Watch India vs Pakistan T20 World Cup? If you want to catch the highly anticipated T20 World Cup match between India and Pakistan, you can do so by subscribing to the Sling TV Willow Cricket package.
**[Watch India vs Pakistan T20 World Cup
](https://sling-tv.pxf.io/c/2960521/1575796/14334?sharedid=cricket_2023)**Willow TV offers high-definition coverage of every thrilling moment of this match. To watch, simply sign up for Sling TV, add the Willow Cricket package, and get ready to support your favourite team.
This article provides detailed information on Where To Watch India vs Pakistan T20 World Cup. Keep reading to find out more.
Suggested: How To Watch T20 World Cup Ind vs Pak Free In USA Online.
Where To Watch India vs Pakistan T20 World Cup
Watching on Sling TV
What is Sling TV?
Sling TV is a popular streaming service in the USA that provides access to a variety of live TV channels, including sports channels that broadcast cricket matches. It’s a fantastic choice for cricket fans who don’t want to deal with traditional cable subscriptions.
How to Subscribe to Sling TV
Visit the Sling TV Website: Head to the official Sling TV website.
Choose a Package: Look for packages that include channels broadcasting the T20 World Cup, such as Willow TV.
Sign Up: Create an account by providing your details. You might need a US billing address and payment method.
Download the App: Download the Sling TV app from your device’s app store.
Start Watching: Login, navigate to Willow HD, and enjoy the match!
Sling TV Subscription Costs
Dakshin Flex: $10 per month. Includes Willow HD, Willow Xtra, and several South Asian entertainment channels.
Desi Binge Plus: $10 for the first month. Includes Willow HD, Willow Xtra, and on-demand content from SonyLIV, Star On-Demand, and Hotstar Specials.
Both packages allow you to watch all 55 T20 World Cup matches live on Willow HD. Choose based on your entertainment preferences.
Features of Sling TV
DVR Capabilities: Record matches to watch later.
Multiple Devices: Stream on several devices simultaneously.
Customizable Packages: Pick channels that suit your needs.
Watching on Willow TV
What is Willow TV?
Willow TV is a dedicated cricket channel in the USA, offering comprehensive coverage of cricket matches, including live broadcasts, highlights, and replays. It’s perfect for cricket enthusiasts.
How to Subscribe to Willow TV
Visit the Official Site: Go to Willow TV’s website.
Choose a Subscription Plan: Select either a monthly or yearly plan.
Create an Account or Log In: New users sign up; existing users log in.
Enter Payment Details: Provide your payment information.
Confirm and Subscribe: Verify your subscription.
Download the App and Watch: Get the Willow TV app or access it via a web browser.
Willow TV Subscription Costs
Monthly Subscription: $7.99 per month.
Yearly Subscription: $69.99 per year (a discount compared to monthly).
Choose a monthly subscription if you only plan to watch the T20 World Cup, or a yearly one if you’re a year-round cricket fan.
Features of Willow TV
Dedicated Cricket Content: Live matches, replays, and highlights.
On-Demand Content: Watch past matches and special programs.
High-Quality Streaming: Enjoy matches in HD.
Finding the Match on Sling TV
Open the Sling TV app on your device.
Go to the “Guide” section.
Look for “Willow HD”.
Watch the match live on Willow HD. Check the Sling TV schedule for the exact timing.
Why Watch the T20 World Cup on Sling TV?
Live Streaming: Don’t miss a moment with live coverage.
Accessibility: Available on smartphones, tablets, smart TVs, and computers.
Affordability: Various packages to fit different budgets.
Additional Tips
Check the Schedule: Confirm the match date and time on Sling TV or Willow TV’s website.
Stable Internet Connection: Ensure a strong connection to avoid buffering.
Multiple Devices: Stream on multiple devices with friends and family!
By following these steps, you’ll be ready to enjoy the India vs Pakistan T20 World Cup match live on Sling TV with Willow TV.
Conclusion
Watching the T20 World Cup match between India and Pakistan in the USA is easy and affordable with Sling TV. With high-quality streaming, multi-device support, and customizable packages, it’s an excellent choice for cricket fans. Follow the steps outlined above to ensure you don’t miss any action from this thrilling match.
We hope that in this article you have got a lot of information about Where To Watch India vs Pakistan T20 World Cup.
FAQs
Can we watch the T20 World Cup on Hotstar for free?
Yes, you can watch the T20 World Cup 2024 on Hotstar for free on mobile devices using the Disney+ Hotstar app.
Can I watch the World Cup on Hulu?
Yes, with a Hulu + Live TV subscription, you can watch the FIFA World Cup, which includes channels like Fox and FS1.
Is Willow TV free on Roku?
No, Willow TV is not free on Roku. It’s a subscription-based service, though they do offer monthly and yearly plans. You can subscribe through their website and then access the content on the Roku app.
Who has won the most T20 matches between India and Pakistan?
India has won the most T20 matches against Pakistan, with a record of 9 wins out of 12 matches played.
Can you watch the World Cup on Amazon Stick?
Yes, you can watch the World Cup on an Amazon Fire TV Stick.
How many times has Pakistan won the T20 World Cup?
Pakistan has won the T20 World Cup once, in 2009. | rameshchand |
1,882,037 | How To Watch India vs Pakistan T20 World Cup Live In USA | Searching for how to watch the cricket World Cup live in the USA? then all the information is... | 0 | 2024-06-09T12:03:26 | https://dev.to/rameshchand/how-to-watch-india-vs-pakistan-t20-world-cup-live-in-usa-pm5 | t20world, t20worldcup, worldcup, indiavspakistan | Searching for how to watch the cricket World Cup live in the USA? then all the information is here.
[Click Here To Subscribe To Sling TV](https://sling-tv.pxf.io/c/2960521/1575796/14334?sharedid=cricket_2023)
The anticipation is building, and cricket fans across the United States are gearing up for the highly-awaited Men's ICC Cricket World Cup in 2024. Set to kick off on June 9, this tournament promises to be a cricketing spectacle like no other.
Watch Pakistan vs India World Cup match online in USA. Sling TV will stream live telecast of the match in its platform. New subscriber can get up to 45% OFF on their subscription.
## How to Watch T20 World Cup in USA
You have two options for watching the T20 World Cup in the USA:
[Sling TV](https://sling-tv.pxf.io/c/2960521/1575796/14334?sharedid=cricket_2023): This app offers live streaming of the T20 World Cup and other cricket content. The free tier includes some live streaming, but you will need to subscribe to get access to all of the matches.
Willow TV: and other cricket content. The free tier. This is the official broadcaster of the T20 World Cup in the USA. You can subscribe to Willow TV directly or through a streaming service that includes it, such as Sling TV or fuboTV.
## Which is the Best option to Watch T20 World Cup:
Price: If price is your main concern, compare Sling TV packages with the Willow TV subscription cost. Factor in any introductory offers available. Both have monthly Plan at 10$ and Annual at $100
Additional channels: Do you want other channels besides cricket? If so, a Sling TV package might be a good choice. Sling TV offers 15 channels while Willow offers only 2 channels at the same price.
Cricket focus: If you only care about cricket and the T20 World Cup, Willow TV offers a dedicated experience.
The T20 World Cup matches are currently underway, Now you can watch Live and enjoy. | rameshchand |
1,881,744 | Highlight Specific Segment Block as Notice, Tip, Caution, Important & Warning in Markdown | Markdown is a very popular scripting language. It is used starting from writing documentation to even... | 0 | 2024-06-09T12:01:14 | https://dev.to/fahimfba/highlight-specific-segment-block-as-notice-tip-caution-important-warning-in-markdown-2ne8 | markdown, github | Markdown is a very popular scripting language. It is used starting from writing documentation to even creating a complete website. Therefore, almost all of us frequently use this scripting language every once in a while.
However, there are some limitations to this language as well. In some cases, we can not add that much styling or modification to the writing in it. Luckily for us, there are 5 highlighting features for specific segment blocks as Notice, Tip, Caution, Important, and Warning. It is also applicable in GitHub MarkDown as well. In this article, I am going to talk about it in detail.
## Video Walkthrough
If you like to watch a complete video with step-by-step guidelines, then you can watch the video right now!
{% embed https://www.youtube.com/watch?v=HMeCXobi90E %}
## "Note" Specific Block
If you want to highlight information that users should take into account, even when skimming, then it is appropriate for you!
### Syntax
```
> [!NOTE]
> I want the readers to read it carefully as it contains many important docs.
```
Output:
You see that the preview already has a nice "Note" related symbol also!
If you want to write any Note related segment, then you need to start it with an angle bracket ( `>` ), and then you need to specify the highlighting block as Note with `[!NOTE]`.
After that, you need to add an angle bracket ( `>` ) in each new line that you want to include in your specific "Note" block.
If you want to close the Note block, then simply remove the additional angle bracket in the new line. That's all!
## "Tip" Specific Block
If you want to provide optional information to help a user to be more successful, then it is appropriate in those scenarios.
### Syntax
```
> [!TIP]
> Use the command line to detect and resolve the errors!
```
Output:
You see that the preview already has a nice "Tip" related symbol also!
If you want to write any Tip related segment, then you need to start it with an angle bracket ( `>` ), and then you need to specify the highlighting block as Tip with `[!TIP]`.
After that, you need to add an angle bracket ( `>` ) in each new line that you want to include in your specific "Tip" block.
If you want to close the Tip block, then simply remove the additional angle bracket in the new line. That's all!
## "Warning" Specific Block
If you want to provide critical content demanding immediate user attention due to potential risks, then it is an appropriate block for you.
## Syntax
```
> [!WARNING]
> DON'T DELETE THE `package.json` file!
```
Output:
You see that the preview already has a nice "Warning" related symbol also!
If you want to write any Warning related segment, then you need to start it with an angle bracket ( `>` ), and then you need to specify the highlighting block as Warning with `[!WARNING]`.
After that you need to add an angle bracket ( `>` ) in each new line that you want to include in your specific "Warning" block.
If you want to close the Warning block, then simply remove the additional angle bracket in the new line. That's all!
## "Caution" Specific Block
If you want to provide negative potential consequences of an action, then you can use this.
### Syntax
```
> [!CAUTION]
> Don't execute the code without commenting on the test cases.
```
Output:
You see that the preview already has a nice "Caution" related symbol also!
If you want to write any Caution related segment, then you need to start it with an angle bracket ( `>` ), and then you need to specify the highlighting block as Warning with `[!CAUTION]`.
After that you need to add an angle bracket ( `>` ) in each new line that you want to include in your specific "Caution" block.
If you want to close the Caution block, then simply remove the additional angle bracket in the new line. That's all!
## "Important" Specific Block
If you want to provide crucial information necessary for users to succeed, then you can use this.
### Syntax
```
> [!IMPORTANT]
> Read the contribution guideline before adding a pull request.
```
Output:
You see that the preview already has a nice "Important" related symbol also!
If you want to write any Important related segment, then you need to start it with an angle bracket ( `>` ), and then you need to specify the highlighting block as Warning with `[!IMPORTANT]`.
After that you need to add an angle bracket ( `>` ) in each new line that you want to include in your specific "Important" block.
If you want to close the Important block, then simply remove the additional angle bracket in the new line. That's all!
## Conclusion
Thank you for reading the entire article. I hope you have learned something new here.
If you have enjoyed the procedures step-by-step, then don't forget to let me know on [Twitter/X](https://twitter.com/Fahim_FBA) or [LinkedIn](https://www.linkedin.com/in/fahimfba/). I would appreciate it if you could endorse me for some relevant skillsets on LinkedIn. I would also recommend you to subscribe to my [YouTube channel](https://youtube.com/@FahimAmin) for regular programming related content.
You can follow me on [GitHub](https://github.com/FahimFBA) as well if you are interested in open source. Make sure to check my [website](https://fahimbinamin.com/) (https://fahimbinamin.com/) as well.
Thank you so much! 😀
| fahimfba |
1,882,029 | My Pen on CodePen | Check out this Pen I made! | 0 | 2024-06-09T11:50:18 | https://dev.to/ayush16coder/my-pen-on-codepen-5gfi | codepen | Check out this Pen I made!
{% codepen https://codepen.io/Nitin-Dongre/pen/zYXVqXV %} | ayush16coder |
1,880,822 | How I built a rhymes dictionary ? | Hi and welcome to this new article ! I've been working hard on my mobile dictionary Remède this last... | 0 | 2024-06-09T12:00:00 | https://remede.camarm.fr/2024/06/01/Rhymes-dictionary.html | mobile, french, ionic, javascript | Hi and welcome to this new article !
I've been working hard on my mobile dictionary Remède this last month (I released the `1.2.0-beta` version a week ago).
I've added many things but today I will focus on a special functionality.
I've added a **rhymes dictionary** which is completely running on your phone (or any browser) without an internet connection !
## 1. - Find data to build a rhymes database
I've searched for open source projects which had already built a rhymes database so I can re-use their database and adapt it for Remède.
After some searches, I discovered that [Open Lexicon](http://www.lexique.org), a project which provides various open database about words, has enough data to build a rhymes dictionary.
I found the [Drime](https://a3nm.net/git/drime/files.html) project, which uses _Open Lexicon_ database to generate its own rhymes database. With their documentation, I built my own base and added these rows in a new table of the Remède database.
## 2. - How it works ?
If you don't know Remède (you can check it out on [Github](https://github.com/camarm-dev/remede) and leave a star), it uses a **Sqlite database** which is downloaded locally.
Now that I have enough fields about words, how can I build an efficient dictionary ?
First, let's explain how this dictionary is working.
A table `rime` contains rows (one row is equal to one word) with the fields `phon_end`, `word_end` (and more fields like `feminine` or `elide` for particular rhymes...).
So for example, to get the rimes of the word `bonjour`, phoneme `\b$ZuR\`, we will filter all the words whose phoneme finishes with `uR`.
_The requests will look like_
```sql
SELECT word FROM rime WHERE phon_end LIKE '%uR'
```
And you understood the main concept ! Now we can add fields to filter and get more specific results, like in the application.
## 3. Final look
Yes we have a dictionary but not anyone can use it ! You must know Sql to browse it...
I tried to have the simplest and most understandable interface. For the interface, I use Ionic 7 with Vue 3.
I integrate this functionality as following in Remède:
| Description | Screenshot |
| --- | --- |
| Searching a word in the rimes dictionary |  |
| Browsing rimes |  |
| Set _syllabes_ filter |  |
## What's next ?
For the moment, some functionalities are missing and the experience is not perfect... I want to add the possibility to choose the "nature" of the wanted rhymes (verb, noun...) and to enhance word finding experience.
Thank you for reading,
Don't hesitate to try Remède (https://remede.camarm.fr, and let me a message about your experience if you want !)
Have nice code ! | camarm |
1,882,034 | How to apply with MOI certificate at a UK University | How to apply with MOI What Is M.O.I The whole meaning of MOI is the medium of instruction . A... | 0 | 2024-06-09T11:59:17 | https://dev.to/educationhub/how-to-apply-with-moi-certificate-at-a-uk-university-3ibk | study, studyinukwith |
**How to apply with MOI**
What Is M.O.I
The whole meaning of MOI is the [medium of instruction](https://educationhub-bd.com/blog/How-to-apply-with-MOI-certificate-at-a-UK-University) . A medium of instruction is a document that verifies the language used to teach a particular course or program. It is a type of language proficiency certificate.
MOI is the certificate of the language in which you completed your previous course instruction or degree. That degree can be a bachelor's or a master's. In Bangladesh, the certificate of the last degree you studied and participated in in Bengali or English is the medium of instruction. For example, if you have done your bachelor's studies in Bengali, your medium of instruction is Bangla, and if you have done it in English, your medium of instruction will be English.[ Click Here](https://educationhub-bd.com/blog/How-to-apply-with-MOI-certificate-at-a-UK-University)
Why is a MOI certificate required?
The MOI certificate is often required for students who wish to study abroad or for professionals who must demonstrate their language skills for work or academic purposes. The MOI certificate is usually needed after completing an undergraduate degree when applying for a subsequent higher degree. Currently, a MOI certificate is also required in the private job sector. Because those whose MOI is in English are more likely to study and work abroad,
Types of MOI-Friendly Universities
The good news is that MOI acceptance is being accepted across a wide range of universities in the UK, such as:
Modern Universities: Newer institutions often have a more flexible approach to admissions and may readily accept MOI as proof of English proficiency.
Universities with International Focus: Institutions with a strong international student population may be well-versed in accepting MOI certificates and understanding their applicants' diverse educational backgrounds.
Specialized Universities: Universities with a strong focus on specific fields, like business or technology, might be more likely to accept MOI for programs heavily reliant on English communication.
Beyond MOI: Subject Specificity and Rankings
While MOI can simplify the application process, there are other factors universities consider.
Subject Matter: Some programs, particularly those with a heavy technical focus or a strong emphasis on research, might still require IELTS scores for admission.
University Ranking and Reputation: Highly ranked universities with a competitive applicant pool might have stricter language requirements, regardless of MOI.
Study in the UK With a MOI Accepting University List
University of Hertfordshire
Cardiff Metropolitan University
Birmingham City University
University of Essex
University of Portsmouth
Bangor University
University of South Wales
Which countries accept MOI certificates for study?
Reputed universities can now apply through MOI certificates in several countries, including the USA, the UK, and France. Those usually apply for a master's degree after completing a bachelor's degree. Again, not all universities in Bangladesh can apply for MOI certificates; some specific universities can.
Who issues the certificate?
Your school, college, or university is responsible for providing you with a medium instruction certificate for admission or work purposes. Candidates can submit an official application to request this document. Many universities award degrees and academic certificates, specifying the medium of education in the document. Click Here
UK University Medium of Instruction Approved List
Leading University
Shahjalal University of Science and Technology
National University
Port City International University
East Delta University
International Islamic University Chittagong
Chittagong University of Science and Technology
Noakhali Science & Technology University
University of Chittagong,
Bangladesh Agricultural University
Ahsanullah University of Science & Technology,
Daffodil International University
United International University
Southeast University
University of Liberal Arts, Bangladesh
Green University of Bangladesh
Army Institute of Business Administration
University of Asia-Pacific Bangladesh
American International University, Bangladesh
Independent University Bangladesh
East-West University, Bangladesh
North-South University, Bangladesh
BRAC University
Dhaka University of Engineering & Technology
Jahangirnagar University
Bangladesh University of Engineering & Technology
University of Dhaka
IUBAT
University of Rajshahi
Rajshahi University of Engineering & Technology
Khulna University
Khulna University of Engineering & Technology
| educationhub |
1,882,032 | Building a Gym Management App with Laravel, Filament, Herd, and Blueprint | Hello friends, I recently took on the challenge of building a gym management application. Using... | 0 | 2024-06-09T11:54:56 | https://dev.to/hassanshahzadaheer/building-a-gym-management-app-with-laravel-filament-herd-and-blueprint-2b3m | Hello friends,
I recently took on the challenge of building a gym management application. Using Laravel along with some fantastic tools like Filament, Herd, and Blueprint, I was able to create a robust app in no time. If you find documentation hard to follow or just want a more guided experience, this post is for you. I'll walk you through everything step-by-step. Let's dive in!
## Setting Up Your Environment with Herd
First things first, let's get our development environment ready with Herd. Herd makes setting up Laravel projects a breeze, so you can get to coding faster.
1. **Download and Install Herd:** Head over to [Herd's official site](https://herd.laravel.com/) and follow the instructions to install it.
2. **Create a New Laravel Project:** Open your terminal and run:
```bash
laravel new project-name
```
Replace `project-name` with your desired project name.
## Installing Filament
Filament is an awesome admin panel for Laravel applications. It gives you a beautiful, easy-to-use interface to manage your app's data.
1. **Navigate to Your Project Directory:**
```bash
cd project-name
```
2. **Install Filament:** Run the following command to install Filament:
```bash
composer require filament/filament:"^3.2" -W
```
3. **Set Up Filament:** After installation, set it up with:
```bash
php artisan filament:install --panels
```
4. **Start the Development Server:**
```bash
php artisan serve
```
Now, you can access the admin panel at `http://localhost/admin`.
5. **Create an Admin User:**
```bash
php artisan make:filament-user
```
Follow the prompts to set up a username and password.
## Accelerating Development with Blueprint
Blueprint lets you define your application's models, controllers, and more using simple YAML files. This can save you a ton of time.
1. **Install Blueprint:**
```bash
composer require -W --dev laravel-shift/blueprint
```
2. **Create a New Blueprint Draft:**
```bash
php artisan blueprint:new
```
Here's an example `draft.yaml` file for our gym management application:
```yaml
models:
Member:
id: id
name: string:255
email: string:255 unique
phone: string:20
address: string:255
membership_start_date: date
membership_end_date: nullable date
membership_type_id: foreignId:constrained:cascade
relationships:
belongsTo: membership_type
hasMany: payments, invoices
MembershipType:
id: id
name: string:255
description: text
price: decimal:8,2
duration_months: integer
relationships:
hasMany: members
Payment:
id: id
member_id: foreignId:constrained:cascade
amount: decimal:8,2
payment_date: date
payment_method: string:50
relationships:
belongsTo: member
Invoice:
id: id
member_id: foreignId:constrained:cascade
amount: decimal:8,2
due_date: date
paid: boolean
relationships:
belongsTo: member
```
3. **Build Your Application:**
```bash
php artisan blueprint:build
```
This command will generate the necessary models, migrations, and more based on your `draft.yaml`.
4. **Run the Migrations:**
```bash
php artisan migrate
```
## Creating Filament Resources
Filament makes it super easy to generate resource management interfaces. Let's create resources for our models.
1. **Generate Resources:**
```bash
php artisan make:filament-resource MemberResource --generate
php artisan make:filament-resource PaymentResource --generate
php artisan make:filament-resource InvoiceResource --generate
```
## Wrapping Up
And there you have it! Using Herd, Filament, and Blueprint, I was able to quickly build a functional gym management application. These tools made the process smooth and enjoyable, turning what could have been a tedious task into a fun project.
If you're looking to speed up your Laravel development and build powerful applications with ease.
Follow me on [Twitter](https://twitter.com/hshahzadaheer), [LinkedIn](https://www.linkedin.com/in/hassanshahzadaheer), and [Instagram](https://www.instagram.com/hassan_aheer) for more insights and updates!
| hassanshahzadaheer | |
1,882,031 | 3d rotating pyramid | Check out this Pen I made! | 0 | 2024-06-09T11:54:53 | https://dev.to/kemiowoyele1/3d-rotating-pyramid-2bdf | codepen | Check out this Pen I made!
{% codepen https://codepen.io/frontend-magic/pen/QWPLwYV %} | kemiowoyele1 |
1,882,030 | CSS spaceship | CSS and HTML spaceship | 0 | 2024-06-09T11:52:22 | https://dev.to/kemiowoyele1/css-spaceship-292g | codepen | <p>CSS and HTML spaceship</p>
{% codepen https://codepen.io/frontend-magic/pen/KKWNdMo %} | kemiowoyele1 |
1,882,026 | Companies with Red Logos: Exploring the Most Famous Red Logos | Red is a color that commands attention. It's bold, energetic, and associated with strong emotions... | 0 | 2024-06-09T11:44:25 | https://dev.to/akiburrahaman/companies-with-red-logos-exploring-the-most-famous-red-logos-5c97 | logo, brand, icon, webdev | 
Red is a color that commands attention. It's bold, energetic, and associated with strong emotions like love, passion, and even danger. Many companies use red in their logos to evoke these feelings and stand out in the crowded marketplace. In this article, we'll explore some of the most famous companies with red logos and delve into the psychology and design strategies behind these iconic symbols.
## The Psychology of Red in Branding
Before diving into specific examples, it's essential to understand why red is such a powerful color in branding. Red is known to stimulate the senses and encourage action. It's a color often used to create a sense of urgency (think of clearance sales or stop signs) and can even increase heart rate and blood pressure. This makes red an excellent choice for brands that want to be seen as dynamic, exciting, and influential.
## Famous Companies with Red Logos
### 1. Coca-Cola
Perhaps the most iconic red logo globally, Coca-Cola's emblem is instantly recognizable. The script font combined with the vibrant [red color](https://www.designevo.com/blog/top-red-logos.html) gives a feeling of tradition and excitement. The red color is associated with energy and passion, aligning perfectly with the brand's identity as a refreshing and invigorating beverage.
### 2. YouTube
YouTube's red play button has become a universal symbol for video content. The color red here conveys energy and excitement, encouraging users to engage and spend more time watching videos. It also helps the [YouTube logo](https://freepnglogo.com/youtube-logo-png-image) stand out on various devices and interfaces.
### 3. Target
The [Target logo](https://freepnglogo.com/target-logo-png) is a simple, yet iconic, design featuring a red bullseye. The bullseye is often displayed against a white background. Target's red bullseye logo is simple, bold, and highly recognizable. The red color evokes feelings of excitement and urgency, aligning with the brand's identity as a go-to destination for a wide range of products. The simplicity of the design ensures it is memorable and easily identifiable.
### 4. Toyota
The [Toyota logo](https://freepnglogo.com/toyota-logo-png) is one of the most recognizable automotive logos in the world. It features three overlapping ovals, forming the letter "T." Toyota's red logo, often seen in the form of a red oval surrounding the brand name or emblem, signifies reliability and passion. The red color helps the logo stand out and represents the brand's commitment to performance and innovation in the automotive industry.
### 5. Red Bull
Red Bull's logo, with its charging bulls and red circle, represents energy, strength, and action. The red color is fitting for a brand that sells energy drinks designed to boost performance and endurance.
### 6. Netflix
Netflix's red logo is simple yet powerful. The bold red lettering stands out against various backgrounds and is associated with passion and excitement. Red is also a color that commands attention, which is perfect for a brand competing for viewers' time in a saturated market.
### 7. LEGO
LEGO's red logo is playful and engaging, mirroring the creativity and fun that the brand represents. The red color is energetic and captures the excitement of building and imagining new worlds.
### 8. CNN
CNN's red logo is authoritative and eye-catching. In the world of news, red conveys a sense of urgency and importance, which is critical for a 24-hour news network aiming to keep viewers informed and engaged.
### 9. KFC
KFC's red logo is appetizing and memorable. The color red is effective in the food industry for stimulating appetite and drawing attention. Combined with the iconic image of Colonel Sanders, the red logo helps create a strong brand identity.
### 10. McDonald's
While the golden arches are the most recognizable part of the McDonald's logo, the red background plays a crucial role in the brand's identity. Red stimulates appetite, making it a popular choice in the food industry. McDonald's uses red to evoke excitement and happiness, creating an inviting atmosphere for customers.
### 11. Roblox
The [Roblox logo](https://freepnglogo.com/roblox-logo-png) features a minimalist design with a modern and playful aesthetic. The logo consists of the word "ROBLOX" written in a bold, geometric font. The second "O" is slightly tilted, creating a distinctive and recognizable look. The current version, introduced in 2017, emphasizes simplicity and versatility, reflecting the platform's creative and dynamic nature. Roblox, a popular online game platform and game creation system, uses this logo to represent its vibrant and innovative community.
## The Design Elements of Red Logos
### Color Psychology
As discussed, red is a color that evokes strong emotions. Brands that use red in their logos aim to tap into these emotions, creating a memorable and impactful brand image. Red can signify different things based on the context and industry, from energy and passion to appetite stimulation and urgency.
### Contrast and Visibility
Red is a color that stands out against most backgrounds, making it a popular choice for logos. Its high visibility ensures that logos are easily recognizable and can be seen from a distance, whether on a billboard or a smartphone screen.
### Simplicity
Many successful red logos are simple in design. This simplicity ensures that the logo is easily recognizable and memorable. For example, Coca-Cola's script font and Netflix's straightforward typography demonstrate how simplicity can be powerful when combined with a bold color like red.
## FAQs about Red Logos
### Why do so many companies choose red for their logos?
Many companies choose red for their logos because it is a color that captures attention and evokes strong emotions. Red is associated with energy, passion, excitement, and urgency, making it an effective color for brands that want to create a powerful and memorable presence.
### Is red a good color for all industries?
While red is a versatile color, it is particularly effective in industries where excitement, urgency, or appetite stimulation are important. For example, food and beverage companies, media and entertainment brands, and energy drink producers often use red. However, it might not be as suitable for industries that require a calm and trustworthy image, such as finance or healthcare.
### How can a company choose the right shade of red for their logo?
Choosing the right shade of red depends on the brand's identity and the emotions they want to evoke. Bright reds can convey energy and excitement, while darker reds can suggest elegance and sophistication. It's essential to consider the overall design and the brand's message when selecting the shade of red.
### Are there any disadvantages to using red in a logo?
One potential disadvantage of using red in a logo is that it can sometimes be overwhelming or aggressive if not used correctly. It's crucial to balance red with other design elements and colors to ensure that the logo conveys the intended message without being too intense.
### Can red be combined with other colors in a logo?
Yes, red can be effectively combined with other colors in a logo. White is a common choice as it creates a clean and crisp contrast. Black can add a touch of sophistication, while yellow or orange can enhance the sense of energy and excitement. The key is to find a color combination that complements the brand's identity and values.
## Conclusion
Red logos are powerful tools in branding, leveraging the color's ability to evoke strong emotions and capture attention. From Coca-Cola to Netflix, many of the world's most recognizable brands use red to create a dynamic and memorable image. Understanding the psychology and design principles behind these logos can help businesses create their own impactful brand identities. Whether aiming to stimulate appetite, convey energy, or create a sense of urgency, red can be a highly effective color choice in the world of branding. | akiburrahaman |
1,882,024 | I Hosted My first Website | I Hosted my first Website Lyricus😊😊. Here you can get 🎶song🎶 lyrics simply. take a look at... | 0 | 2024-06-09T11:37:10 | https://dev.to/shahan_k_5a525e24a07f6da6/i-hosted-my-first-website-2hle | webdev, javascript, firstweb, html | I Hosted my first Website Lyricus😊😊.
Here you can get 🎶song🎶 lyrics simply.
take a look at [lyricus.netlify.app](https://lyricus.netlify.app/).
Dont forget to tell your opinions(and problems😜).
| shahan_k_5a525e24a07f6da6 |
1,882,023 | Song Download: The Evolution, Impact, and Future of Digital Music Access. | The ability to download songs has transformed the way we experience music, providing unprecedented... | 0 | 2024-06-09T11:35:43 | https://dev.to/testing_email_9775839a60c/song-download-the-evolution-impact-and-future-of-digital-music-access-388i | The ability to download songs has transformed the way we experience music, providing unprecedented access to a vast array of tracks at our fingertips. This article explores the history, significance, and future of song downloads, delving into the technological advancements, cultural implications, and evolving trends that have shaped this digital phenomenon.
Introduction to Song Downloads: A Digital Music Revolution
The advent of song downloads marked a pivotal moment in the music industry, fundamentally altering how people access and enjoy music. By enabling the transfer of digital music files from the internet to personal devices, **[song download](https://songinform.com/)** provided a convenient alternative to physical media like CDs and vinyl records. This shift revolutionized music consumption, making it easier than ever for users to build extensive digital libraries and access their favorite songs anytime, anywhere.
The Rise of Digital Downloads: From Napster to Legitimate Platforms
The late 1990s saw the emergence of peer-to-peer (P2P) file-sharing networks such as Napster, which allowed users to share and download songs for free. This unprecedented access to music was met with legal challenges from the music industry due to copyright infringement. Despite these controversies, the popularity of song downloads paved the way for the development of legitimate digital music stores like iTunes, Amazon Music, and Google Play Music. These platforms provided legal avenues for purchasing and downloading high-quality music files, ensuring artists and rights holders received proper compensation.
Technological Advancements: Enhancing the Download Experience
Technological advancements have continually enhanced the song download experience. Improved compression algorithms and higher bitrates have elevated sound quality, while user-friendly interfaces and faster internet speeds have streamlined the download process. Additionally, the proliferation of smartphones, tablets, and portable music players has made it easier than ever to carry vast music libraries on the go, further cementing the popularity of song downloads.
The Impact of Song Downloads on Music Consumption
Song downloads have had a profound impact on music consumption patterns. They have democratized access to music, allowing users from diverse backgrounds to explore various genres and artists. By enabling personalized playlists and custom music libraries, downloads have transformed listening habits, fostering a more intimate and personalized connection with music. This shift has also facilitated the discovery of independent and emerging artists, who can now reach audiences without relying solely on traditional distribution channels.
Legal and Ethical Considerations: Navigating Copyright and Piracy
The widespread availability of song downloads has brought significant legal and ethical considerations to the forefront. The ease of sharing digital files led to rampant music piracy, prompting the music industry to enforce stricter copyright laws and pursue legal action against infringing platforms. These efforts highlighted the importance of supporting artists by purchasing music legally. Today, legal download platforms ensure that artists and rights holders are fairly compensated, promoting a sustainable digital music ecosystem.
The Role of Song Downloads in Supporting Artists
Purchasing and downloading songs directly supports artists, especially independent musicians who rely on digital sales for income. Platforms like Bandcamp and SoundCloud provide artists with a direct channel to sell their music to fans, fostering a closer artist-fan connection. By choosing to buy music rather than relying solely on streaming, fans can contribute more significantly to artists' livelihoods, encouraging the creation of new music.
Song Downloads vs. Streaming: Complementary Digital Experiences
While streaming services like Spotify, Apple Music, and YouTube Music have become the dominant mode of music consumption, song downloads continue to offer unique benefits. Downloads provide offline access, ensuring uninterrupted listening without the need for an internet connection. They also offer a sense of ownership and typically higher audio quality compared to most streaming options. These advantages make song downloads a valuable complement to streaming, catering to different user preferences and scenarios.
Trends in Song Downloads: Personalized Playlists and High-Quality Audio
Current trends in song downloads reflect a growing demand for personalized listening experiences and high-quality audio. Users increasingly seek curated playlists tailored to their tastes, as well as the option to download tracks for offline enjoyment. The rising interest in high-fidelity audio has driven demand for higher-bitrate mp3s and lossless formats like FLAC, appealing to listeners who prioritize sound quality.
Challenges and Opportunities: The Future of Song Downloads
The future of song downloads faces both challenges and opportunities. The rise of streaming services, ongoing issues with piracy, and evolving consumer preferences present significant hurdles. However, these challenges also present opportunities for innovation. Enhancing user experience through better recommendation algorithms, integrating with smart home devices, and exploring new pricing models can keep song downloads relevant. Additionally, the resurgence of interest in physical media and vinyl records suggests a continued appreciation for music ownership, which song downloads can fulfill in the digital realm.
Looking Ahead: The Enduring Appeal of Song Downloads
Despite the dominance of streaming, song downloads retain their appeal for many music enthusiasts. The desire for offline access, higher audio quality, and a sense of ownership ensures that downloads will remain a significant part of the music consumption landscape. As technology evolves, download platforms must adapt to meet changing user needs and leverage new advancements to enhance the listening experience. By doing so, song downloads can continue to play a vital role in the digital music ecosystem.
Conclusion
**[Song download](https://songinform.com/)** have left an indelible mark on the music industry, revolutionizing how we access and enjoy music. From their inception in the late 1990s to their ongoing relevance today, downloads have transformed music consumption, making it more accessible, personalized, and supportive of artists. As we celebrate the legacy of song downloads, we look forward to their continued evolution and enduring impact on the digital music landscape.
| testing_email_9775839a60c | |
1,882,022 | Building a Diet Assistant using Lyzr SDK | In today’s fast-paced world, maintaining a balanced diet can be challenging. However, with the Diet... | 0 | 2024-06-09T11:35:32 | https://dev.to/akshay007/building-a-diet-assistant-using-lyzr-sdk-260i | ai, programming, diet, python | In today’s fast-paced world, maintaining a balanced diet can be challenging. However, with the **Diet Assistant** powered by **Lyzr SDK**, you can now effortlessly track and optimize your nutrition. This blog post will walk you through the incredible features of the Diet Assistant and how it can transform your dietary habits for the better.
The **Diet Assistant** is an advanced application designed to help you monitor and analyze your daily food intake. Leveraging the power of **Lyzr Automata** Agent and OpenAI’s state-of-the-art models, this tool provides personalized nutritional insights that are both practical and actionable. Whether your goal is to enhance your overall health, achieve fitness targets, or meet specific dietary requirements, the Diet Assistant is your perfect companion.
**Why use Lyzr SDK’s?**
With **Lyzr SDKs** , crafting your own **GenAI** application is a breeze, requiring only a few lines of code to get up and running swiftly.
[Checkout the Lyzr SDK’s](https://docs.lyzr.ai/homepage)
**Lets get Started!**
Create an **app.py** file
```
import streamlit as st
from lyzr_automata.ai_models.openai import OpenAIModel
from lyzr_automata import Agent, Task
from lyzr_automata.pipelines.linear_sync_pipeline import LinearSyncPipeline
from PIL import Image
from lyzr_automata.tasks.task_literals import InputType, OutputType
import os
```
This code creates a **Streamlit** app using the Lyzr Automata SDK and OpenAI’s language model to build a diet assistant tool. It imports necessary libraries for the web interface, AI model, and image handling. The OpenAI API key is set from Streamlit secrets. The app hides the default header, displays a logo, and provides a text input for users to log their food intake. An OpenAIModel instance is configured with specific parameters. The generation function defines an AI agent to analyze the user's input and provide nutritional insights.
```
# Set the OpenAI API key
os.environ["OPENAI_API_KEY"] = st.secrets["apikey"]
```
This line sets the **OpenAI API key** as an environment variable, retrieving it securely from Streamlit’s secrets for authentication.
```
input = st.text_input("Please enter your daily food intake:",placeholder=f"""Type here""")
```
This line creates a text input field in a **Streamlit** app where users can enter their daily food intake. It includes a label and a placeholder text to guide the user.
```
open_ai_text_completion_model = OpenAIModel(
api_key=st.secrets["apikey"],
parameters={
"model": "gpt-4-turbo-preview",
"temperature": 0.2,
"max_tokens": 1500,
},
)
```
This code instantiates an **OpenAIModel** object from the lyzr_automata package, configuring it to use the **GPT-4** language model with specific parameters. It securely retrieves the API key from Streamlit's secrets for authentication.
```
def generation(input):
generator_agent = Agent(
role=" Expert DIETITIAN ",
prompt_persona=f"Your task is to EMPOWER users to TRACK and ANALYZE their DAILY FOOD INTAKE.")
prompt = f"""
[Prompts here]
"""
```
This function generation defines an AI agent using the Agent class from the Lyzr Automata package. The agent is assigned the role of an "**Expert Dietitian**" with a specified prompt persona. The prompt persona instructs the agent on its task, which is to empower users to track and analyze their daily food intake.
```
generator_agent_task = Task(
name="Generation",
model=open_ai_text_completion_model,
agent=generator_agent,
instructions=prompt,
default_input=input,
output_type=OutputType.TEXT,
input_type=InputType.TEXT,
).execute()
return generator_agent_task
```
This code snippet creates a task instance named “Generation” using the Lyzr Automata package’s Task class. It specifies parameters such as the model (open_ai_text_completion_model), agent (generator_agent), instructions (the prompt defined earlier), default input (user input), and output/input types. The **execute()** method is called to execute the task, and the result is returned.
```
if st.button("Insights"):
solution = generation(input)
st.markdown(solution)
```
This piece of code creates a button using Streamlit’s **st.button()** function. When the button labeled "Insights" is clicked, it triggers the **generation()** function, passing the user input (input) as an argument. The result of the function execution is stored in the solution variable, which is then displayed using Streamlit's **st.markdown()** function.
**App link**: https://dietassistant-lyzr.streamlit.app/
**Source Code**: https://github.com/isakshay007/Diet_Assistant
The **Diet Assistant** is powered by the Lyzr Automata Agent, utilizing the capabilities of OpenAI’s GPT-4 Turbo. For any inquiries or issues, please contact Lyzr. You can learn more about Lyzr and their offerings through the following links:
**Website**: [Lyzr.ai](https://www.lyzr.ai/)
**Book a Demo**: [Book a Demo](https://www.lyzr.ai/book-demo/)
**Discord**: [Join our Discord community](https://discord.com/invite/nm7zSyEFA2)
**Slack**: [Join our Slack channel](https://anybodycanai.slack.com/join/shared_invite/zt-2a7fr38f7-_QDOY1W1WSlSiYNAEncLGw#/shared-invite/email) | akshay007 |
1,882,021 | i want to KNOW About PHONE | A post by Sami Niyigena | 0 | 2024-06-09T11:34:26 | https://dev.to/sami_niyigena/i-want-to-know-about-phone-1fel | sami_niyigena | ||
1,882,020 | i want to KNOW About PHONE | A post by Sami Niyigena | 0 | 2024-06-09T11:34:24 | https://dev.to/sami_niyigena/i-want-to-know-about-phone-4cg1 | sami_niyigena | ||
1,882,011 | The Ultimate beginners guide to open source – part 4: Why you should contribute to open source projects | Intro Getting involved in open source projects is a great way to improve your coding skills and work... | 0 | 2024-06-09T11:32:20 | https://dev.to/dunsincodes/the-ultimate-beginners-guide-to-open-source-part-4-why-you-should-contribute-to-open-source-projects-f3n | webdev, opensource, beginners, github | **Intro**
Getting involved in open source projects is a great way to improve your coding skills and work on real-world projects. By contributing to these projects, you can gain valuable experience that will make you a better developer. This blog will explore the benefits of contributing to open source, such as building your resume, connecting with other developers, and learning new technologies.
**Benefits**
1. Contributing to open source projects allows you to gain hands-on experience with real-world projects and a variety of programming languages. As you encounter and solve many code challenges, you will get practical experience that will help you become a better developer.
2. Contributions to open source serve as real evidence of your skills. These contributions can be listed on your resume, portfolio, or LinkedIn profile, which will impress potential clients or employers and boost your chances of getting contracts or employment offers.
3. You can connect with other developers, maintainers, and industry experts. These contacts can lead to mentorship opportunities, collaboration on interesting projects, or even freelance work referrals.
4. Open source projects come in a variety of sizes and shapes, covering a wide spectrum of technologies and tools. Participating exposes you to new libraries, frameworks, and development approaches, broadening your knowledge and keeping your skills current.
5. Many open-source projects have challenging problems that must be resolved. This allows you to handle hard problems, troubleshoot code, and come up with creative solutions. Such experiences can greatly improve your troubleshooting and debugging skills.
6. Contributing to open source is a method for developers all over the world to give back. You contribute to open-source software, making technology more accessible and enhancing it for users worldwide. This sensation of achievement can be extremely fulfilling.
7. You may be recognized for your contributions depending on your level of contribution. This can include badges on platforms like as GitHub, references in project documentation, or invites becoming a core contributor, all of which can help you build your reputation in the community.
8. Contributors from all over the world are frequently involved in open source projects. You will have the opportunity to collaborate with people from various origins, cultures, and perspectives if you participate. This global engagement has the potential to extend your horizons, strengthen your communication skills, and foster a greater understanding of global teamwork.
**_Thanks for reading, let me know what you think about this and if you would like to see more, if you think i made a mistake or missed something, don't hesitate to comment_**
_**Check out [Part 3](https://dev.to/dunsincodes/the-ultimate-beginners-guide-to-open-source-part-2ways-to-find-open-source-projects-to-contribute-to-3bkg) on ways to find open source projects to contribute to, [Part 2](https://dev.to/dunsincodes/the-ultimate-beginners-guide-to-open-source-part-2-defeating-the-fear-of-contributing-1olj) on how to contribute to a project without feeling scared and [Part 1](https://dev.to/dunsincodes/the-ultimate-beginners-guide-to-open-source-part-1-2la9) on the basics of open source.**_ | dunsincodes |
1,882,010 | Building a Neat Node.js Project: Your Guide to a Clean Folder Structure 📂 | Starting a Node.js project? Keeping your codebase clean and organized is crucial. Let's talk about... | 0 | 2024-06-09T11:27:55 | https://dev.to/raksbisht/building-a-neat-nodejs-project-your-guide-to-a-clean-folder-structure-4eh6 | node, cleancode, tutorial | Starting a Node.js project? Keeping your codebase clean and organized is crucial. Let's talk about setting up a tidy folder structure for your project to make coding easier and collaboration smoother!
### Getting Started 🏗️
1. **Root Directory**: First things first, create a main folder for your project. This is where all your project files and folders will live.
2. **Package.json**: This file is super important. It holds key info about your project and its dependencies. Keep it at the main level for easy access.
### Essential Folders 📁
1. **src/**: This is where your actual code lives. It's where you'll spend most of your time writing and editing files.
2. **test/**: Keep your testing stuff separate. This folder is for organizing all your test files, making testing a breeze.
3. **config/**: Configuration files like environment settings, database setups, and API keys go here. Keeping them separate helps manage different setups easily.
### Structure for Your App 🚀
1. **Controllers/**: These handle incoming requests and send back responses. Keeping them separate helps keep your code organized and focused.
2. **Models/**: Here's where you define your data structures and work with the database. Each data model gets its own file for easy management.
3. **Views/**: If you're using server-side rendering or templates, put your view files here. They're what your users see, so keep them organized.
4. **Routes/**: Define your API endpoints here. It's like mapping out the roads your app will use to communicate with the outside world.
5. **Services/**: Sometimes you need extra logic that doesn't fit neatly into controllers. That's where services come in. They handle complex operations while keeping controllers clean and focused.
### Handy Tools and More 🧰
1. **Utils/**: Store shared utility functions here. These little helpers keep your code DRY (Don't Repeat Yourself) and make life easier.
2. **Public/**: Any static files like images, stylesheets, or client-side JavaScript go here. They're directly accessible to users and browsers.
### Extra Goodies ✨
1. **Logs/**: Logging is crucial for tracking what's happening in your app. Create a folder to store log files for easy debugging and monitoring.
2. **Docs/**: Don't forget documentation! Keep all your project guides and references here, making it easy for everyone to understand your project.
### Wrapping It Up 🎁
Following a clean folder structure makes your development journey smoother. It's easier to find what you need and collaborate with others. Stick to the structure you choose, and don't forget to adapt as your project grows. Happy coding! 🚀 | raksbisht |
1,880,807 | AR Game ~ Location Information ~ | Table of contents Background Creation of AR game with location information Execution of the game... | 0 | 2024-06-09T11:25:57 | https://dev.to/takeda1411123/ar-game-location-information--1e8k | unity3d, gamedev, location, api | Table of contents
- Background
- Creation of AR game with location information
- Execution of the game
# Background
I will develop AR Game with Unity, AR foundation and so on. To learn AR development, I am researching about AR and the software related it. This blog shows the research and the process of developing AR game. If you have a question, I am happy to answer it.
# Creation of AR game with location information
In our game, users' location information will be utilized for showing user on real map. When players move in real move, their characters on the map move. This post will show how to develop the AR game with location information.
## Technology
These below technologies will be used in this game.
- Google Maps API
- CUDLR
### Google Maps API
At this time, Google Maps API will be utilized to show users' character on the map. In google map apps, the map is showed by using still image tile.
In addition to this map information, the Google Maps API can dynamically change the way it is displayed, so you can view the map from the view point of a TPS user. The map display can also be changed to make it look more like a game.
#### API Key
It is necessary to get API keys to use Google Maps API.
You can get it referencing the below URL.
https://developers.google.com/maps/documentation/maps-static/get-api-key
#### Sample Request
If you get API Key, you can get static image tile by requesting Map Static API like the below URL.
https://maps.googleapis.com/maps/api/staticmap?center=Berkeley,CA&zoom=14&size=400x400&key={Your API Key}
* {Your API key} can be changed to your API key.
#### Request from Unity
Also, you can request from Unity project. If you request, you can see the map tile like below image.
### CUDLR
CUDLR is one of the debug tool. Log can be seen on web while the game is running on your devices.
#### Important Points
CUDLR is for debug or test, so do not use for production.
Please make sure to delete CUDLR objects before release.
## Get users' location
This game requires synchronisation of the user's actual position with the player position in the game. For this purpose, the actual position of the user needs to be acquired.
### Permission for getting user location
This game requires user permission for location data to be acquired, which can be set on PlayerSettings.
### Code sample
You can get user location information on Unity.
```
// check if the program has the user permission
if (!Input.location.isEnabledByUser)
{
Debug.Log("Location services are not available");
yield break;
}
// start location service
Input.location.Start();
// wait for the Initializing services
int maxWait = 20;
while (Input.location.status == LocationServiceStatus.Initializing && maxWait > 0)
{
yield return new WaitForSeconds(1);
maxWait--;
}
// get location information
Debug.Log(
"Location: " + Input.location.lastData.latitude + " " + Input.location.lastData.longitude
);
// stop location service
Input.location.Stop();
```
## Get users rotation
For a better user experience, the orientation of the player is also changed depending on the orientation of the device.
### Code sample
```
// enable compass
Input.compass.enabled = true;
// change the rotation of the player depending on the rotation of the device
var heading = 180 + Input.compass.magneticHeading;
var rotation = Quaternion.AngleAxis(heading, Vector3.up);
transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Time.fixedTime * .001f);
```
# Execution of the game
Merging these above implementation, players can see the map around the actual user position. Also, they can see around while changing the rotation of devices.
{% youtube https://www.youtube.com/watch?v=xkTECfwaLe4 %}
# Next Step
As next step, I will research Geospatial API for the development using outdoor buildings.
| takeda1411123 |
1,882,008 | Understanding Throttling in JavaScript | Throttling is a technique in programming to ensure that a function is executed at most once in a... | 0 | 2024-06-09T11:21:26 | https://dev.to/dipakahirav/understanding-throttling-in-javascript-55jl | javascript, webdev, beginners, programming | Throttling is a technique in programming to ensure that a function is executed at most once in a specified time interval. This is particularly useful for controlling events that trigger multiple times in quick succession, like window resizing, scrolling, or mouse movements.
please subscribe to my [YouTube channel](https://www.youtube.com/@DevDivewithDipak?sub_confirmation=1
) to support my channel and get more web development tutorials.
### What is Throttling?
Throttling ensures that a function is called at most once every specified interval. Unlike debouncing, which only executes the function after a delay period has passed since the last event, throttling ensures that the function is executed at regular intervals regardless of how many times the event is triggered.
### Why Use Throttling?
- **Performance Enhancement**: Reduces the number of function executions, preventing potential performance bottlenecks.
- **Resource Management**: Helps in managing resource-intensive tasks by limiting their frequency.
- **Consistent Updates**: Ensures regular updates at specified intervals, useful for tasks like updating a position indicator during scrolling.
### How Throttling Works
Consider a scenario where you want to track the position of a user scrolling through a page. Without throttling, the position tracking function could be called hundreds of times per second, overwhelming the browser. Throttling helps by limiting the function call to a fixed interval, such as once every 100 milliseconds.
### Implementing Throttling in JavaScript
Here is a simple implementation of a throttle function:
```javascript
function throttle(func, limit) {
let lastFunc;
let lastRan;
return function(...args) {
const context = this;
if (!lastRan) {
func.apply(context, args);
lastRan = Date.now();
} else {
clearTimeout(lastFunc);
lastFunc = setTimeout(function() {
if ((Date.now() - lastRan) >= limit) {
func.apply(context, args);
lastRan = Date.now();
}
}, limit - (Date.now() - lastRan));
}
}
}
```
### Usage Example
Let's see how we can use the `throttle` function in a real-world scenario:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Throttling Example</title>
<style>
body {
height: 2000px;
margin: 0;
padding: 0;
}
.indicator {
position: fixed;
top: 10px;
left: 10px;
background: #333;
color: #fff;
padding: 10px;
}
</style>
</head>
<body>
<div class="indicator" id="scrollIndicator">Scroll Position: 0</div>
<script>
const scrollIndicator = document.getElementById('scrollIndicator');
function updateScrollIndicator() {
scrollIndicator.textContent = `Scroll Position: ${window.scrollY}`;
}
const throttledUpdateScrollIndicator = throttle(updateScrollIndicator, 200);
window.addEventListener('scroll', throttledUpdateScrollIndicator);
function throttle(func, limit) {
let lastFunc;
let lastRan;
return function(...args) {
const context = this;
if (!lastRan) {
func.apply(context, args);
lastRan = Date.now();
} else {
clearTimeout(lastFunc);
lastFunc = setTimeout(function() {
if ((Date.now() - lastRan) >= limit) {
func.apply(context, args);
lastRan = Date.now();
}
}, limit - (Date.now() - lastRan));
}
}
}
</script>
</body>
</html>
```
In this example:
- An indicator displays the current scroll position of the window.
- The `updateScrollIndicator` function updates the position of the scroll indicator.
- The `throttledUpdateScrollIndicator` function is created using the `throttle` function with a limit of 200 milliseconds.
- The `scroll` event listener triggers the throttled function, ensuring that the position is updated at most once every 200 milliseconds.
### Conclusion
Throttling is a powerful technique for optimizing web applications by controlling the frequency of function executions. By ensuring functions are called at regular intervals, throttling helps manage performance and resource usage effectively. Whether dealing with scrolling, resizing, or other rapid events, throttling is an essential tool in your JavaScript toolkit.
*Follow me for more tutorials and tips on web development. Feel free to leave comments or questions below!*
### Follow and Subscribe:
- **Website**: [Dipak Ahirav] (https://www.dipakahirav.com)
- **Email**: dipaksahirav@gmail.com
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)
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| dipakahirav |
1,882,007 | Simplifying Software Mechanics: A Clear Guide to Processes, Threads, Handles, Services and Applications | We, as computer science engineers specialized in various fields such as Cloud, Full-stack... | 0 | 2024-06-09T11:20:35 | https://dev.to/mahakfaheem/simplifying-software-mechanics-a-clear-guide-to-processes-threads-handles-services-and-applications-32bc | computerscience, programming, learning, community | We, as computer science engineers specialized in various fields such as Cloud, Full-stack development, Data Science, Machine Learning, Artificial Intelligence, and Cybersecurity, often know a lot about our domains. However, sometimes we struggle with the very basics, clinging to those doubts that couldn’t get clear in that lecture back in our second or third semester. These fundamental concepts might seem trivial, but they form the backbone of our advanced knowledge. So, here’s a read to just skim through and solidify, clearing off those lingering doubts once and for all.
## Processes: The Heartbeat of Computing
A process is a program in execution. When you run a program, it becomes a process, which means it has been loaded into memory and the operating system is executing it. Each process has its own memory space and resources, such as file handles and security tokens. The operating system manages processes, ensuring they get the CPU time and resources needed to function.
### Key Characteristics of Processes:
**`Isolation:`** Each process runs in its own memory space, preventing it from interfering with other processes.
**`Resource Ownership:`** Processes own resources such as memory, file handles, and devices.
**`Lifecycle:`** A process goes through various states – starting, running, waiting, and terminated.
### Process Lifecycle
**`Creation:`** Processes are typically created by the operating system when a program is executed. This can be done using system calls like _fork()_ in Unix-based systems or _CreateProcess()_ in Windows.
**`Execution:`** Once created, the process is managed by the OS scheduler, which allocates CPU time and resources to it.
**`Termination:`** A process can terminate normally or be terminated by the OS or other processes.
Using the _subprocess_ module, you can create and manage processes easily.
```
import subprocess
# Create a new process
process = subprocess.Popen(['python', 'script.py'])
# Wait for the process to complete
process.wait()
print("Process finished.")
```
## Threads: The Engines of Concurrency
Threads are the smallest units of execution within a process. A single process can have multiple threads, each performing different tasks concurrently. Threads within the same process share the same memory space and resources, making communication and data sharing between threads efficient.
### Key Characteristics of Threads:
**`Shared Resources:`** Threads of the same process share memory and resources.
**`Lightweight:`** Creating and managing threads is less resource-intensive compared to processes.
**`Concurrency:`** Threads enable parallelism within a process, improving performance on multi-core systems.
### Thread Operations
Threads can operate in different modes based on the type of task they perform. They are particularly useful for I/O-bound operations and can significantly improve performance in multi-core systems.
Using the _threading_ module, you can create and manage threads.
```
import threading
import time
def print_numbers():
for i in range(1, 6):
print(f"Number: {i}")
time.sleep(1)
def print_letters():
for letter in 'ABCDE':
print(f"Letter: {letter}")
time.sleep(1)
# Create threads
thread1 = threading.Thread(target=print_numbers)
thread2 = threading.Thread(target=print_letters)
# Start threads
thread1.start()
thread2.start()
# Wait for threads to complete
thread1.join()
thread2.join()
print("Threads finished execution.")
```
The `thread1.join()` call ensures that the main thread waits for `thread1` to complete its execution. Similarly, `thread2.join()` ensures that the main thread waits for `thread2` to finish.
## Handles: The Pointers to System Resources
Handles are references or pointers to system resources, like files, devices, or even processes. When a process wants to interact with a resource, it uses a handle, which the operating system manages. This abstraction allows the OS to control access to resources, ensuring security and stability.
### Key Characteristics of Handles:
**`Abstraction:`** They abstract the details of the underlying resource.
**`Security:`** The OS controls handles, enforcing access permissions.
**`Resource Management:`** Handles help in tracking and managing resources.
Using file handles, you can read from and write to files.
```
# Open a file for writing
with open('example.txt', 'w') as file_handle:
file_handle.write("Hello, this is a test file.")
# Open the file for reading
with open('example.txt', 'r') as file_handle:
content = file_handle.read()
print("File content:", content)
```
## Services: The Background Workers
Services are special types of processes that run in the background and perform essential functions without user intervention. They are often started at boot time and run continuously to provide critical system functions like network connectivity, printing, and system updates.
### Key Characteristics of Services:
**`Background Operation:`** Services run in the background, independent of user interaction.
**`Automatic Start:`** Many services start automatically with the operating system.
**`Essential Functions:`** They provide core functionalities required by other applications and the OS.
You can create and manage a simple service using `systemd`.
```
# my_service.py
import time
while True:
print("Service is running...")
time.sleep(10)
# my_service.service (systemd service file)
[Unit]
Description=My Custom Python Service
[Service]
ExecStart=/usr/bin/python3 /path/to/my_service.py
Restart=always
[Install]
WantedBy=multi-user.target
```
**Commands:**
```sh
# Copy the service file to the systemd directory
sudo cp my_service.service /etc/systemd/system/
# Reload systemd manager configuration
sudo systemctl daemon-reload
# Start the service
sudo systemctl start my_service
# Enable the service to start on boot
sudo systemctl enable my_service
# Check the status of the service
sudo systemctl status my_service
```
## Applications: The User-Focused Programs
Applications are programs designed to perform specific tasks for users. They provide an interface (often graphical) for users to interact with the system and perform tasks like writing documents, browsing the web, or playing games. Applications can consist of one or more processes and can utilize multiple threads to enhance performance.
### Key Characteristics of Applications:
**`User Interface:`** Applications typically have a user interface (UI) for interaction.
**`Task-Oriented:`** They are designed to help users perform specific tasks.
**`Multiple Processes:`** Complex applications can spawn multiple processes for different functionalities.
You can create a simple multi-threaded web application using Flask.
```
from flask import Flask, request
import threading
import time
app = Flask(__name__)
def background_task(task_name):
print(f"Starting background task: {task_name}")
time.sleep(10) # Simulate a long-running task
print(f"Background task {task_name} completed")
@app.route('/start_task', methods=['POST'])
def start_task():
task_name = request.form.get('task_name')
thread = threading.Thread(target=background_task, args=(task_name,))
thread.start()
return f"Task {task_name} started!"
if __name__ == '__main__':
app.run(debug=True)
```
## Conclusion
Navigating the intricacies of processes, threads, handles, services, and applications can be daunting, but understanding these fundamental concepts is essential for any computer science professional. These components work together harmoniously to ensure our software runs efficiently and reliably. With this knowledge solidified, we can build more robust systems and tackle more advanced challenges in our specialized fields with confidence. So, next time you encounter a performance issue or a mysterious bug, you’ll have a clearer understanding of what might be happening under the hood.
By mastering these basics, you lay a strong foundation for more complex and specialized knowledge, enabling you to excel in your field and create innovative solutions to real-world problems.
Thanks!
| mahakfaheem |
1,882,006 | Day 8 : Basic Git & GitHub for DevOps Engineers. | What is Git? Git is a free open source distributed version control system you can use to track... | 0 | 2024-06-09T11:20:30 | https://dev.to/oncloud7/day-8-basic-git-github-for-devops-engineers-4n99 | github, git, beginners, devops | **What is Git?**
Git is a free open source distributed version control system you can use to track changes in your files. You can work on all types of projects in Git, from small to large.
With Git, you can add changes to your code and then commit them (or save them) when you're ready. This means you can also go back to changes you made before.
**What is Github?**
GitHub is a web interface where you store your Git repositories and track and manage your changes effectively. It gives access to the code to various developers working on the same project. You can make your own changes to a project at the same time as other developers are making theirs.
If you accidentally mess up some code in your project while making changes, you can easily go back to the previous stage where the mess has not occurred yet.
**What is Version Control? How many types of version controls we have?**
A version control system is a software that tracks changes to a file or set of files over time so that you can recall specific versions later. It also allows you to work together with other programmers.
The version control system is a collection of software tools that help a team to manage changes in a source code. It uses a special kind of database to keep track of every modification to the code.
Developers can compare earlier versions of the code with an older version to fix the mistakes.
**Two Types of Version Control System-**
1.Centralized Version Control System.
2.Distributed Version Control System.
**Centralized Version Control System-**
The developers needed to collaborate with other developers on other systems.To deal with this Centralized Version Control System were developed.
Centralized Version Control System uses a central server to store all the database and team collaboration. But due to single point failure, which means the failure of the central server, developers do not prefer it.
**Distributed Version Control System-**
The user has a local copy of a repository. So, the clients don't just check out the latest snapshot of the files even they can fully mirror the repository. The local repository contains all the files and metadata present in the main repository.
DVCS allows automatic management branching and merging. It speeds up of most operations except pushing and pulling. DVCS enhances the ability to work offline and does not rely on a single location
for backups. If any server stops and other systems were collaborating via it, then any of the client repositories could be restored by that server. Every checkout is a full backup of all the data.
**Why we use distributed version control over centralized version control?**
In centralized version control, the versions are saved in the remote repository, while in distributed version control, versions can be saved in the remote repository as well as in local repositories of the local machines.so we prefer DVCS over CVCS.
**Task:**
**1.Create a new repository on GitHub and clone it to your local machine**
**2.Make some changes to a file in the repository and commit them to the repository using Git**
made changes to "fromgithub"
**git init**=To make new git repo/git-init - Create an empty Git repository or reinitialize an existing one.
**git add** fromgithub==Ready to be staged
**git commit -m** "Added changes"==To save changes.
**3.Push the changes back to the repository on GitHub.**
**git push origin master** ===To push from Local to remote.
Thank you for reading!! Hope you find this helpful.Thank you for reading!! Hope you find this helpful. | oncloud7 |
1,878,018 | AR Game ~ Applied AR to practice ~ | Table of contents Background Creation of applied AR Execution of the game Next Step ... | 0 | 2024-06-09T11:17:36 | https://dev.to/takeda1411123/ar-game-applied-ar-to-practice--1g25 | Table of contents
- Background
- Creation of applied AR
- Execution of the game
- Next Step
# Background
I will develop AR Game with Unity, AR foundation and so on. To learn AR development, I am researching about AR and the software related it. This blog shows the research and the process of developing AR game. If you have a question, I am happy to answer it.
# Creation of applied AR
This post will show the implement of AR game, which is named memorial world. I referenced the below course to learn how to create the AR game.
https://www.udemy.com/course/build-augmented-reality-ar-apps-with-arfoundation-unity/
If you want to create the similar game, you should check it out.
## Game Mechanics
In this game, your memories are displayed in an AR space. You can see photos that remind you of your memories in the AR space, and seeing them in places that remind you of your memories will bring back even more memories.
## Technology
In this game, while players can see pictures when they enter the AR entrance, player can not see them when they are out of the AR entrance. Therefore, it is necessary to change how to draw objects depending on the player's position. To change it, these below functions will be used in this game.
- Shader
- Stencil Buffer
- Stencil Test
- Culling
### Shader
This is the program that writes the way to draw. This allows objects to show on scenes. It can shows various expressions on objects such as shade.
### Stencil Buffer
Shader and Stencil are similar and determine how objects are displayed. Stencil makes it possible to change the visibility of objects from certain areas and show pictures only at the entrance of the AR, which is what we want to do this time.
### Stencil Test
Each pixel on the screen has a **Stencil buffer** value and the object has a **Reference value**. The stencil test uses these values to determine whether the object is allowed to be drawn.
### Culling
The process that prevents Unity from performing rendering calculations for GameObjects that are completely obscured (occluded) by other GameObjects. In this game, it is used for being able to see real world from the inside of AR room.
https://docs.unity3d.com/Manual/SL-Cull.html
# Execution of the game
At this time, I displayed free images related anime OnePiece in the AR space for the purpose of introduction. You can actually your memory images. Also, I deployed it to my iOS device and confirmed to display AR objects. Please watch the video below.
{% youtube https://www.youtube.com/watch?v=Nrgw7_sTPD4 %}
If you have any questions about Unity and AR, I'm happy to answer them.
# Next step
I will research APIs related AR and location information to use them for my game. | takeda1411123 | |
1,882,004 | EKS ZeroScaler | Scheduled auto-scaling to zero with Lambda GO client A seamless integration of Golang... | 0 | 2024-06-09T11:09:49 | https://dev.to/wardove/eks-zeroscaler-58nf | aws, tutorial, serverless, kubernetes | ## Scheduled auto-scaling to zero with Lambda GO client
A seamless integration of Golang Lambda kubernetes client, EventBridge, and EKS, all efficiently deployed with Terraform, for dynamic, cost-effective auto-scaling in development environments.
## Table of Contents <a name="Toc"></a>
1. [Introduction](#introduction)
2. [Building and Syncing to S3](#part-1)
3. [Deploying with Helm Chart and Kubernetes Job](#part-2)
4. [Farewell](#farewell)
---
## Introduction <a name="introduction"></a>
In this insightful piece, we will delve into a cutting-edge solution designed to enhance DevOps efficiency and reduce costs in development environments. Leveraging the power of AWS technologies, we will explore how a Golang-based Lambda function, orchestrated by an EventBridge scheduler, can dynamically scale down EKS Fargate namespace deployments to zero. This strategy proves highly effective not only with Fargate but also when paired with autoscaler/karpenter solutions, offering a versatile approach to cost reduction and resource optimization. Significantly lowering resource utilization during non-peak hours, this method is both cost-effective and efficient. Also worth to highlight that we will touch a streamlined way of deploying this Lambda function using Terraform, showcasing an infrastructure-as-code approach that ensures consistency and ease of management.
---
## The Golang Lambda Function - A Deep Dive <a name="part-1"></a>
The heart of this solution is a simple Golang-based Lambda function designed to dynamically scale down deployments in specific namespaces of an EKS cluster. Here’s a closer look at how this function operates.
Our Lambda function is crafted in Go, a language known for its efficiency and suitability for concurrent tasks, making it a perfect choice for cloud-native applications.
```go
package main
import (
"context"
"encoding/json"
"os"
eksauth "github.com/chankh/eksutil/pkg/auth"
autoscalingv1 "k8s.io/api/autoscaling/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"github.com/aws/aws-lambda-go/lambda"
log "github.com/sirupsen/logrus"
)
type Payload struct {
ClusterName string `json:"clusterName"`
Namespaces []string `json:"namespaces"`
Replicas int32 `json:"replicas"`
}
func main() {
if os.Getenv("ENV") == "DEBUG" {
log.SetLevel(log.DebugLevel)
}
lambda.Start(handler)
}
func handler(ctx context.Context, payload Payload) (string, error) {
cfg := &eksauth.ClusterConfig{
ClusterName: payload.ClusterName,
}
clientset, err := eksauth.NewAuthClient(cfg)
if err != nil {
log.WithError(err).Error("Failed to create EKS client")
return "", err
}
scaled := make(map[string]int32)
for _, ns := range payload.Namespaces {
deployments, err := clientset.AppsV1().Deployments(ns).List(ctx, metav1.ListOptions{})
if err != nil {
log.WithError(err).Errorf("Failed to list deployments in namespace %s", ns)
continue
}
for _, deploy := range deployments.Items {
if err := scaleDeploy(clientset, ctx, ns, deploy.Name, payload.Replicas); err == nil {
scaled[ns+"/"+deploy.Name] = payload.Replicas
}
}
}
scaledJSON, err := json.Marshal(scaled)
if err != nil {
log.WithError(err).Error("Failed to marshal scaled deployments to JSON")
return "", err
}
log.Info("Scaled Deployments: ", string(scaledJSON))
return "Scaled Deployments: " + string(scaledJSON), nil
}
func scaleDeploy(client *kubernetes.Clientset, ctx context.Context, namespace, name string, replicas int32) error {
scale := &autoscalingv1.Scale{
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: namespace,
},
Spec: autoscalingv1.ScaleSpec{
Replicas: replicas,
},
}
_, err := client.AppsV1().Deployments(namespace).UpdateScale(ctx, name, scale, metav1.UpdateOptions{})
if err != nil {
log.WithError(err).Errorf("Failed to scale deployment %s in namespace %s", name, namespace)
} else {
log.Infof("Successfully scaled deployment %s in namespace %s to %d replicas", name, namespace, replicas)
}
return err
}
```
Key Components
1. Dependencies and Libraries: The function uses the eksauth package for authenticating with EKS, and the Kubernetes client-go library for interacting with the cluster. AWS Lambda Go SDK is employed for Lambda functionalities, whilelogrus provides robust logging capabilities.
2. Payload Structure: We define a Payload struct to encapsulate the input, including the target cluster’s name, the namespaces to scale, and the desired number of replicas.
3. The Main Function: It initializes the log level based on an environment variable and launches the Lambda handler, demonstrating a simple yet effective setup.
4. Lambda Handler: This function takes the Payload, authenticates with the EKS cluster, and iterates over namespaces to scale down deployments. It’s a demonstration of how straightforward interactions with Kubernetes can be orchestrated in a serverless environment.
5. Scaling Logic with `scaleDeploy` function: Here, we actually adjust the scale of each deployment. This function showcases the practical application of the Kubernetes API in managing cluster resources.
For seamless integration and management, we’ll be placing our Lambda function within a specific directory structure in our Terraform project. This approach not only keeps our project organized but also simplifies the deployment process.
We’ll store the Lambda function in files/lambdas/pod_zeroscaler (some fancy naming won’t hurt 😉) . This dedicated directory within our Terraform project ensures that our Lambda code is logically separated and easily accessible in a location where we can edit our code, build it and deploy it as a lambda function by applying terraform continuously ( we will look into how-to do that later ). Let’s initially set up the lambda function’s code basis.
### Initialize the Go Module
Navigate to the pod_zeroscaler directory and run `go mod init pod_zeroscaler` followed by `go mod tidy`. This commands set up the necessary Go module files, helping manage dependencies and versioning.
### Build the Lambda Function
After initializing the module, we compile our Lambda function using `GOOS=linux go build -o main`
###### Note: JetBrains Goland IDE - For managing projects that involve both Go code and Terraform modules, I highly recommend using JetBrains Goland IDE. Its integrated environment simplifies handling multiple aspects of the project, from coding to deployment. The IDE’s robust features enhance coding efficiency, debugging, and version control management, making it an invaluable tool for any DevOps engineer working in a cloud-native ecosystem. You can get the mentioned Terraform plugin here.
---
## Deploying and Orchestrating the EKS Auto-Scaling Solution with Terraform <a name="part-2"></a>
In this section, we delve into the infrastructure setup for our auto-scaling solution, using Terraform to deploy and orchestrate the components. This setup is a crucial part of our strategy to manage resources efficiently in a cloud-native DevOps environment.
##### Pre-requisites and Setup
Before we dive into the specifics, let’s establish our foundational pre-requisites:
- Existing Terraform Project: Our setup assumes that there’s an existing Terraform project with either a remote or local state setup.
- Pre-configured EKS Cluster: An EKS cluster is already in place, and our solution is designed to integrate with it seamlessly.
- Modular Code Format: The provided Terraform code is in a scratch format, ready to be modularized as per the project’s requirements.
```hcl
locals {
cluster_name = "my-eks-cluster"
pod_zeroscaler = {
enabled = true
scale_out_schedule = "cron(00 09 ? * MON-FRI *)" # At 09:00:00 (UTC), Monday through Friday
scale_in_schedule = "cron(00 18 ? * MON-FRI *)" # At 18:00:00 (UTC), Monday through Friday
namespaces = ["default", "development"]
}
default_tags = {
Environment = var.env
Owner = "Devops"
Managed-by = "Terraform"
}
}
data "aws_iam_policy_document" "lambda_logging_policy" {
statement {
actions = [
"logs:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents"
]
effect = "Allow"
resources = ["*"]
}
}
resource "aws_iam_policy" "lambda_logging_policy" {
name = "${local.cluster_name}-lambda-logging"
policy = data.aws_iam_policy_document.lambda_logging_policy.json
tags = local.default_tags
}
data "aws_iam_policy_document" "describe_cluster_lambda_policy" {
statement {
actions = ["eks:DescribeCluster"]
resources = [aws_eks_cluster.eks_cluster.arn]
}
}
resource "aws_iam_policy" "describe_cluster_lambda_policy" {
name = "describe-cluster-policy"
policy = data.aws_iam_policy_document.describe_cluster_lambda_policy.json
tags = local.default_tags
}
resource "aws_iam_role" "eks_lambda_role" {
name = "${local.cluster_name}-lambda-role"
tags = local.default_tags
assume_role_policy = jsonencode({
Version = "2012-10-17"
Statement = [
{
Action = "sts:AssumeRole"
Effect = "Allow"
Principal = {
Service = ["lambda.amazonaws.com"]
}
},
]
})
}
resource "aws_iam_role_policy_attachment" "describe_cluster_policy" {
role = aws_iam_role.eks_lambda_role.name
policy_arn = aws_iam_policy.describe_cluster_lambda_policy.arn
}
resource "aws_iam_role_policy_attachment" "lambda_logging_policy" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
role = aws_iam_role.eks_lambda_role.name
policy_arn = aws_iam_policy.lambda_logging_policy.arn
}
data "archive_file" "pod_zeroscaler_lambda_zip" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
type = "zip"
source_file = "${path.root}/files/lambdas/pod_zeroscaler/main"
output_path = "/tmp/main.zip"
}
resource "aws_lambda_function" "pod_zeroscaler_lambda" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
filename = data.archive_file.pod_zeroscaler_lambda_zip[0].output_path
source_code_hash = data.archive_file.pod_zeroscaler_lambda_zip[0].output_base64sha256
function_name = "${local.cluster_name}-zeroscaler"
handler = "main"
runtime = "go1.x"
role = aws_iam_role.eks_lambda_role.name
environment {
variables = { CLUSTER_NAME = local.cluster_name }
}
}
// AWS EventBridge Scheduler
data "aws_iam_policy_document" "pod_zeroscaler_invoke_policy" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
statement {
effect = "Allow"
actions = ["lambda:InvokeFunction"]
resources = [aws_lambda_function.pod_zeroscaler_lambda[0].arn]
}
}
resource "aws_iam_policy" "pod_zeroscaler_invoke_policy" {
name = "${local.cluster_name}-zeroscaler-scheduler-policy"
count = local.pod_zeroscaler["enabled"] ? 1 : 0
description = "Allow function execution for scheduler role"
policy = data.aws_iam_policy_document.pod_zeroscaler_invoke_policy[0].json
}
data "aws_iam_policy_document" "pod_zeroscaler_invoke_role" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
statement {
actions = ["sts:AssumeRole"]
principals {
type = "Service"
identifiers = ["scheduler.amazonaws.com"]
}
}
}
resource "aws_iam_role" "pod_zeroscaler_invoke_role" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
name = "${local.cluster_name}-zeroscaler-scheduler-role"
assume_role_policy = data.aws_iam_policy_document.pod_zeroscaler_invoke_role[0].json
}
resource "aws_iam_role_policy_attachment" "pod_zeroscaler_invoke_role" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
policy_arn = aws_iam_policy.pod_zeroscaler_invoke_policy[0].arn
role = aws_iam_role.pod_zeroscaler_invoke_role[0].name
}
resource "aws_scheduler_schedule" "pod_zeroscaler_scale_in" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
name = "${local.cluster_name}-zeroscaler-scale-in"
group_name = "default"
flexible_time_window {
mode = "OFF"
}
schedule_expression = local.pod_zeroscaler["scale_in_schedule"] #"cron(0 8 * * ? *)"
target {
arn = aws_lambda_function.pod_zeroscaler_lambda[0].arn
role_arn = aws_iam_role.pod_zeroscaler_invoke_role[0].arn
input = jsonencode({
"clusterName" = local.cluster_name
"namespaces" = local.pod_zeroscaler["namespaces"]
"replicas" = 0
})
}
}
resource "aws_scheduler_schedule" "pod_zeroscaler_scale_out" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
name = "${local.cluster_name}-zeroscaler-scale-out"
group_name = "default"
flexible_time_window {
mode = "OFF"
}
schedule_expression = local.pod_zeroscaler["scale_out_schedule"]
target {
arn = aws_lambda_function.pod_zeroscaler_lambda[0].arn
role_arn = aws_iam_role.pod_zeroscaler_invoke_role[0].arn
input = jsonencode({
"clusterName" = local.cluster_name
"namespaces" = local.pod_zeroscaler["namespaces"]
"replicas" = 1
})
}
}
```
##### Terraform Infrastructure Overview
1. Local Variables and Configuration
Cluster Name and Lambda Settings: We define key local variables, including the name of the EKS cluster and configurations for the Lambda function, such as its schedule and target namespaces.
Default Tags: These tags are applied to all created resources for easy tracking and management.
2. IAM Policies and Roles
Lambda Logging and EKS Access: Policies are set up to allow the Lambda function to log activities and interact with the EKS cluster ( we will configureaws-auth configmap in a separate section to provide a complete granting necessary access to our lambda ).
Policy Attachments: We attach these policies to the Lambda function’s IAM role, ensuring it has the necessary permissions.
3. Lambda Function Deployment
Function Packaging: The Lambda function, developed in Go and placed in files/lambdas/pod_zeroscaler, is packaged into a zip file.
Deployment: This package is then deployed as a Lambda function in AWS, complete with environment variables and IAM role associations.
4. EventBridge Scheduler
Invoke Policy and Role: We create an IAM policy and role that allows EventBridge to invoke our Lambda function.
Scheduling Resources: Two EventBridge schedules are set up — one for scaling down (scaling in) and the other for scaling up (scaling out) — each targeting our Lambda function with specific payloads.
This Terraform setup not only deploys our Lambda function but also orchestrates its operation, aligning with our goal of automating and optimizing resource utilization in a Kubernetes environment. By utilizing Terraform, we ensure a reproducible and efficient deployment process, encapsulating complex cloud operations in a manageable codebase.
---
## Access Configuration for Lambda in EKS
The final step in our setup involves configuring the AWS EKS cluster to grant the necessary permissions to our Lambda function. This is done by editing the `aws-auth` ConfigMap in the `kube-system` namespace and setting up appropriate Kubernetes roles and bindings using Terraform. This section ensures our Lambda function can interact effectively with the EKS cluster by using the lambda role attached to it.
Reference: [Enabling IAM principal access to your cluster](https://docs.aws.amazon.com/eks/latest/userguide/access-entries.html#creating-access-entries)
We need to update the aws-auth ConfigMap in Kubernetes. This ConfigMap is crucial for controlling access to your EKS cluster. Here’s a sample snippet where the lambda role arn is added to a specific RBAC group named lambda-group ( we will create this group and role binding ).
```yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: aws-auth
namespace: kube-system
data:
mapRoles: |
- rolearn: arn:aws:iam::<ACCOUNT_ID>:role/my-eks-cluster-development-lambda-role
groups:
- lambda-group
- groups:
- system:bootstrappers
- system:nodes
- system:node-proxier
rolearn: arn:aws:iam::<ACCOUNT_ID>:role/my-eks-cluster-development-fargate-pod-execution-role
username: system:node:{{SessionName}}
- groups:yam
- system:bootstrappers
- system:nodes
rolearn: arn:aws:iam::<ACCOUNT_ID>:role/my-eks-cluster-development-node-pod-execution-role
username: system:node:{{EC2PrivateDNSName}}
```
In this ConfigMap, we add a new role entry for our Lambda function’s IAM role. This entry assigns the Lambda role to a group, lambda-group, which we will reference in our Kubernetes role and binding.
### Terraform codebase
```hcl
# Cluster Role and Cluster Role Binding for Lambda
resource "kubernetes_cluster_role" "lambda_cluster_role" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
metadata {
name = "lambda-clusterrole"
}
rule {
api_groups = ["*"]
resources = ["deployments", "deployments/scale"]
verbs = ["get", "list", "watch", "create", "update", "patch", "delete"]
}
rule {
api_groups = [""]
resources = ["pods"]
verbs = ["get", "list", "watch", "create", "update"]
}
}
resource "kubernetes_cluster_role_binding" "lambda_cluster_role_binding" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
metadata {
name = "lambda-clusterrolebinding"
}
role_ref {
api_group = "rbac.authorization.k8s.io"
kind = "ClusterRole"
name = kubernetes_cluster_role.lambda_cluster[0]_role.metadata[0].name
}
subject {
kind = "Group"
name = "lambda-group"
api_group = "rbac.authorization.k8s.io"
}
}
```
We define a Kubernetes Cluster Role and a Cluster Role Binding in Terraform to grant our Lambda function the necessary permissions within the cluster.
The kubernetes_cluster_role resource defines the permissions our Lambda function needs. We grant it a wide range of verbs on deployments and pods, ensuring it can perform its scaling actions.
The `kubernetes_cluster_role_binding` resource binds the above role to the lambda-group. This binding ensures that any IAM role in the `lambda-group` (which includes our Lambda function’s IAM role) gets the permissions defined in the cluster role.
---
## Automating ConfigMap Update with Terraform and Bash script
To streamline the process of updating the `aws-auth` ConfigMap in Kubernetes, we can automate this step using Terraform coupled with a local provisioner and a Bash script. This automation not only saves time but also reduces the potential for manual errors.
We’ll use a Bash script, `aws_auth_patch.sh`, located in `files/scripts`, to modify the `aws-auth` ConfigMap. This script checks if the necessary permissions are already in place and, if not, adds them.
```bash
#!/bin/bash
set -euo pipefail
# Script to update the aws-auth ConfigMap
AWS_AUTH=$(kubectl get -n kube-system configmap/aws-auth -o yaml)
if echo "${AWS_AUTH}" | grep -q "${GROUP}"; then
echo "Permission is already added for ${GROUP}"
else
NEW_ROLE=" - rolearn: ${ROLE_ARN}\n groups:\n - ${GROUP}"
PATCH=$(kubectl get -n kube-system configmap/aws-auth -o yaml | awk "/mapRoles: \|/{printf \"%s\n%s\n\", \$0, \"${NEW_ROLE}\";next}1")
kubectl patch configmap/aws-auth -n kube-system --patch "${PATCH}"
fi
```
This script retrieves the current `aws-auth` ConfigMap, checks if the required role is already added, and if not, it patches the ConfigMap with the new role.
In our Terraform setup, we’ll use a null_resource with a local-exec provisioner to execute this script automatically.
```hcl
resource "null_resource" "patch_aws_auth" {
count = local.pod_zeroscaler["enabled"] ? 1 : 0
triggers = {
api_endpoint_up = aws_eks_cluster.eks_cluster.endpoint
lambda_bootstrapped = aws_iam_role.eks_lambda_role.id
script_hash = filemd5("${path.cwd}/files/scripts/aws_auth_patch.sh")
}
provisioner "local-exec" {
working_dir = "${path.cwd}/files/scripts"
command = "./aws_auth_patch.sh"
interpreter = ["bash"]
environment = {
ROLE_ARN = aws_iam_role.eks_lambda_role.arn
GROUP = kubernetes_cluster_role_binding.lambda_cluster_role_binding.subject[0].name
}
}
}
```
This Terraform resource triggers the script execution whenever there are changes to the EKS cluster endpoint, the Lambda IAM role, or the script itself. The script is executed in the appropriate directory, and necessary environment variables are passed to it.
Alternatively we could use eksctl + local provisioner instead of bash script + kubectl.
```hcl
resource "null_resource" "patch_aws_auth_lambda_role" {
depends_on = [
aws_eks_fargate_profile.eks_cluster_fargate_kubesystem,
data.utils_aws_eks_update_kubeconfig.bootstrap_kubeconfig
]
provisioner "local-exec" {
working_dir = "../files/scripts"
command = <<-EOT
eksctl get iamidentitymapping \
--cluster ${local.cluster_name} \
--region ${local.region} \
--profile ${var.kubeconfig_profile} | grep -q "${aws_iam_role.lambda_role.arn}" || \
eksctl create iamidentitymapping \
--cluster ${local.cluster_name} \
--region ${local.region} \
--arn ${aws_iam_role.lambda_role.arn} \
--group ${kubernetes_cluster_role_binding.lambda_cluster_role_binding.subject[0].name} \
--username system:node:{{EC2PrivateDNSName}} \
--profile ${var.kubeconfig_profile}
EOT
}
}
```
---
## Farewell <a name="farewell"></a> 😊
Thank you for taking the time to read this article. I trust it has offered you valuable insights and practical knowledge to implement in your own DevOps endeavors. As we continue to navigate the ever-evolving landscape of cloud infrastructure and serverless architectures, remember the power of automation and efficient resource management. Keep pushing the boundaries, keep learning, and always strive for excellence!
| wardove |
1,882,003 | Mastering SEO with Angular V18 | Introduction Search Engine Optimization (SEO) is crucial for the success of any website.... | 0 | 2024-06-09T11:06:35 | https://dev.to/aswinthgt/mastering-seo-with-angular-v18-5166 | angular, seo, webdev, javascript | ## Introduction
Search Engine Optimization (SEO) is crucial for the success of any website. While Angular is a powerful framework for building dynamic single-page applications, it presents unique challenges for SEO due to its reliance on JavaScript for rendering content. In this guide, we’ll explore best practices for optimizing an Angular application for search engines, including how to implement meta tags for different pages dynamically.
### 1. Understanding the SEO Challenges in Angular
Angular applications often face SEO challenges because search engine crawlers historically have had difficulty executing JavaScript. This can lead to issues with indexing and ranking content properly.
**Key Challenges:**
- **Client-Side Rendering:** Angular applications render content on the client side, which can be problematic for search engine crawlers.
- **Dynamic Content:** Content that is dynamically loaded can be missed by crawlers.
### 2. Server-Side Rendering with `@angular/ssr`
One of the most effective ways to improve SEO in Angular applications is by using `@angular/ssr` official package, which allows for server-side rendering (SSR). SSR generates static HTML content on the server, making it easier for search engines to index.
**Benefits of SSR:**
- **Improved SEO:** Server-side rendering ensures that crawlers can see the content.
- **Faster First Paint:** Users see content faster because HTML is pre-rendered.
**Setting Up `@angular/ssr`**
1. settings up `@angular/ssr` Package:
```bash
ng add @angular/ssr
```
These commands create and update application code to enable SSR and adds extra files to the project structure.
2.Update `app.config.ts` to enable support for hydrating i18n blocks:
```typescript
export const appConfig: ApplicationConfig = {
providers: [ provideClientHydration(withI18nSupport())]
};
```
To enable hydration for i18n blocks, you can add withI18nSupport to your provideClientHydration call.
During rendering, constructor and initial life cycle hooks, excluding afterRender and afterNextRender, will execute both on the server and in the browser. Loading components’ **ngOnChanges, ngOnInit,** and **ngDoCheck** will be rendered on both the server and the browser, while other event handlers will run exclusively on the browser.
### 3. Dynamic Meta Tags in Angular
Meta tags are essential for SEO, providing search engines with information about the content of your pages. In Angular, you can use the `Meta` service from `@angular/platform-browser` to dynamically update meta tags.
**Adding Meta Tags to the Root Component:**
First, import the `Meta` and `Title` services in your root component (e.g., `app.component.ts`):
```typescript
import { Meta, Title } from '@angular/platform-browser';
```
```typescript
export class AppComponent {
constructor(private meta: Meta, private titleService: Title) { }
updateMetaTags() {
this.titleService.setTitle('Your Angular App - Home');
// Standard Meta Tags
this.meta.addTag({ name: 'description', content: 'Welcome to the home page of your Angular app.' });
this.meta.addTag({ name: 'keywords', content: 'Angular, SEO, JavaScript' });
// Open Graph Meta Tags
this.meta.addTag({ property: 'og:title', content: 'Your Angular App - Home' });
this.meta.addTag({ property: 'og:description', content: 'Welcome to the home page of your Angular app.' });
this.meta.addTag({ property: 'og:image', content: 'path/to/your/image.png' });
}
}
```
**Meta Tag Key Differences:**
1. Attribute Used:
- Standard Meta Tags use the `name` attribute.
- Open Graph Meta Tags use the `property` attribute.
2.Intended Audience:
- Standard Meta Tags are for search engines and web browsers.
- Open Graph Meta Tags are for social media platforms to enhance sharing.
Call `updateMetaTags()` from your component’s ngOnInit method or wherever appropriate:
```typescript
ngOnInit() {
this.updateMetaTags();
}
```
### 4. Page-Wise Meta Tag Updates
For a better SEO strategy, each page should have its own unique meta tags. This can be achieved by updating the meta tags within each component corresponding to different routes.
**Example: Updating Meta Tags in a Component:**
Suppose you have an `About` page. Update its component (e.g., `about.component.ts`) to set specific meta tags:
```typescript
export class AboutComponent implements OnInit {
constructor(private meta: Meta, private titleService: Title) { }
ngOnInit(): void {
this.titleService.setTitle('About Us - Your Angular App');
this.meta.updateTag({ name: 'description', content: 'Learn more about us at Your Angular App.' });
this.meta.updateTag({ name: 'keywords', content: 'Angular, About Us, Company' });
this.meta.updateTag({ property: 'og:title', content: 'About Us - Your Angular App' });
this.meta.updateTag({ property: 'og:description', content: 'Learn more about us at Your Angular App.' });
this.meta.updateTag({ property: 'og:image', content: 'path/to/about-image.png' });
}
}
```
### 5. Implementing Lazy Loading for Faster Load Times
Lazy loading modules can significantly improve your application’s performance, making it faster and more responsive, which indirectly benefits SEO by improving user experience metrics.
**Configuring Lazy Loading:**
Update your `app.routes.ts` to use lazy loading:
```typescript
export const routes: Routes = [
{path: '', loadComponent: () => import('../app/home/home.component').then(c=>c.HomeComponent)},
{path: 'about', loadComponent: () => import('../app/about/about.component').then(c=>c.AboutComponent)}
];
```
### 6. Structured Data for Rich Snippets
Structured data helps search engines understand your content better and can result in rich snippets, which are enhanced listings in search results.
**Adding Structured Data with JSON-LD:**
Include structured data in your component using JSON-LD. For example, in `about.component.ts`:
``` typescript
export class AboutComponent {
private renderer = inject(Renderer2)
private rendererFactory = inject(RendererFactory2)
ngOnInit(): void {
this.renderer = this.rendererFactory.createRenderer(null, null);
this.addStructuredData();
}
addStructuredData() {
const script = this.renderer.createElement('script');
script.type = 'application/ld+json';
script.text = `
{
"@context": "http://schema.org",
"@type": "Organization",
"name": "Your Angular App",
"url": "https://your-angular-app.com",
"logo": "https://your-angular-app.com/logo.png",
"description": "Learn more about us at Your Angular App."
}`;
this.renderer.appendChild(document.head, script);
}
}
```
##Conclusion
Optimizing an Angular application for SEO requires a combination of server-side rendering, dynamic meta tag management, and structured data implementation. By following these practices, you can ensure that your Angular app is more discoverable and ranks higher in search engine results, providing a better experience for users and driving more traffic to your site.
| aswinthgt |
1,882,002 | If you could use notion to build an app/startup , what would you make? | I've been working hard on a framework that converts notion pages to usable apps. I wanted to know... | 0 | 2024-06-09T11:04:47 | https://dev.to/lilshake/if-you-could-use-notion-to-build-an-appstartup-what-would-you-make-5fgg | nocode, beginners, productivity, startup | I've been working hard on a framework that converts notion pages to usable apps. I wanted to know what use cases would be most popular.
This would be a purely **no code solution** (maximum code would be a simple DSL) and the focus is on actually getting an app out there that you've just built in notion.
If anyone is interested in trying out the framework please let me know!! Thank youu
Assume the following integrations are available
1. Sign in with Google, phone number etc
2. Payments from your end users and subscriptions
3. Normal notion pages or content can be used as UI
4. Notion databases are used to model any data with forms and views etc etc
5. Chat between any user in your app
or anything else you want.. just tell me any app idea you have. The technical side would be sorted. | lilshake |
1,882,001 | How I Was Introduced to DevOps: My Journey from Uncertainty to Passion | Intern To DevOps | 0 | 2024-06-09T11:02:36 | https://dev.to/ujjwalkarn954/how-i-was-introduced-to-devops-my-journey-from-uncertainty-to-passion-5la | devops, development, developer, iac | [Intern To DevOps](https://ujjwalkarn954.github.io/article2.html) | ujjwalkarn954 |
1,882,000 | App | रिऍक्ट-डॉक ची माहिती. बेस्ट एज्युकेशनल डॉक्युमेंटेशन आणि ब्लॉगिंग प्लॅटफॉर्म वॉज लोड ऑल इंडियन... | 0 | 2024-06-09T10:58:52 | https://dev.to/nandkishor_dhekane_0146dd/app-bg0 | रिऍक्ट-डॉक ची माहिती.
बेस्ट एज्युकेशनल डॉक्युमेंटेशन आणि ब्लॉगिंग प्लॅटफॉर्म वॉज लोड ऑल इंडियन स्टुडंट्स.
अँप लिंक : https://dev-reactdoc-app.pantheonsite.io/ | nandkishor_dhekane_0146dd | |
1,881,999 | How Captcha Solver Speeds Up Your reCAPTCHA Solving Process? | In today's digital age, security measures such as reCAPTCHA are essential to protect websites from... | 0 | 2024-06-09T10:58:32 | https://dev.to/media_tech/how-captcha-solver-speeds-up-your-recaptcha-solving-process-45io | In today's digital age, security measures such as reCAPTCHA are essential to protect websites from spam and malicious activities. However, solving reCAPTCHAs can often be a time-consuming process for users. This is where a Captcha Solver becomes invaluable. A Captcha Solver is a tool designed to automate the process of solving reCAPTCHAs, significantly enhancing efficiency and user experience. In this article, we will explore how Captcha Solvers work and how they can expedite the reCAPTCHA solving process.
**Understanding reCAPTCHA and Its Importance**
reCAPTCHA, developed by Google, is a sophisticated form of CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) designed to differentiate between human users and automated bots. By presenting users with tasks such as identifying objects in images or transcribing distorted text, reCAPTCHA effectively prevents automated scripts from accessing restricted areas of a website.
The implementation of reCAPTCHA is crucial for website security. It protects against various forms of online abuse, including:
**Spam submissions:** Automated bots can flood websites with spam content, overwhelming the system and degrading user experience.
**Brute-force attacks:** Bots can attempt to guess passwords or other sensitive information, potentially compromising user accounts.
**Data scraping:** Unauthorized bots can extract valuable information from websites, which can then be used for malicious purposes.
Despite its benefits, reCAPTCHA can sometimes frustrate legitimate users, especially when the tasks are challenging or time-consuming. This is where Captcha Solvers come into play.
**How Captcha Solvers Work**
Captcha Solvers leverage advanced algorithms and machine learning techniques to analyze and solve reCAPTCHA challenges automatically. Here's a breakdown of the process:
**Image Recognition and Text Analysis**
Most reCAPTCHA challenges involve identifying objects within images or deciphering distorted text. Captcha Solvers use image recognition software to scan and identify patterns, objects, or text within the provided images. This process involves:
**Image segmentation:** Dividing the image into segments to isolate the relevant portions for analysis.
**Feature extraction:** Identifying key features such as edges, textures, and shapes within the segmented portions.
**Pattern matching:** Comparing the extracted features with a database of known patterns to make accurate identifications.
**Machine Learning and Neural Networks**
Captcha Solvers employ machine learning models, particularly convolutional neural networks (CNNs), to improve their accuracy and efficiency. These models are trained on vast datasets containing various types of reCAPTCHA challenges, enabling them to recognize patterns and solve puzzles more effectively over time.
**Automation Scripts**
Once the reCAPTCHA challenge is analyzed and solved, automation scripts simulate human interactions to submit the correct responses. These scripts can handle various types of reCAPTCHA, including:
**Image-based reCAPTCHA:** Selecting specific objects within an image grid.
**Text-based reCAPTCHA:** Typing out distorted text.
**Checkbox reCAPTCHA:** Simply checking a box to confirm human presence.
**Benefits of Using Captcha Solvers**
Integrating Captcha Solvers into your workflow can offer numerous advantages:
**Increased Efficiency**
Captcha Solvers drastically reduce the time and effort required to solve reCAPTCHA challenges. Automated solutions can complete these tasks in a fraction of the time it would take a human user, allowing for smoother and faster access to website content.
**Enhanced User Experience**
By automating the reCAPTCHA solving process, Captcha Solvers minimize user frustration and improve overall satisfaction. Users can navigate websites seamlessly without being interrupted by cumbersome security checks.
**Scalability**
For businesses and websites with high traffic volumes, Captcha Solvers provide a scalable solution to handle numerous reCAPTCHA challenges simultaneously. This ensures that legitimate users are not delayed or inconvenienced during peak usage times.
**Reduced Abandonment Rates**
Lengthy or difficult reCAPTCHA challenges can lead to high abandonment rates, where users leave the site before completing their intended actions. Captcha Solvers help retain users by streamlining the verification process, reducing the likelihood of abandonment.
**Choosing the Right Captcha Solver**
When selecting a Captcha Solver, consider the following factors:
**Accuracy and Success Rate**
The effectiveness of a Captcha Solver is measured by its accuracy and success rate in solving reCAPTCHA challenges. Look for solutions that have demonstrated high accuracy in various test scenarios.
**Compatibility**
Ensure that the Captcha Solver is compatible with the specific types of reCAPTCHA used on your website. Some solvers may be optimized for image-based challenges, while others may excel at text-based tasks.
**Speed**
The primary goal of using a Captcha Solver is to expedite the reCAPTCHA solving process. Evaluate the speed at which different solvers can complete challenges to find the most efficient option.
**Implementing Captcha Solvers in Your Workflow**
**Integration**
Integrate the Captcha Solver into your website or application. This may involve configuring APIs, setting up automation scripts, and testing the solution to ensure seamless operation.
**Conclusion**
Captcha Solvers offer a powerful solution to streamline the reCAPTCHA solving process, enhancing user experience and operational efficiency. By automating the verification process, businesses can ensure that their websites remain secure without compromising on user satisfaction. As technology continues to evolve, the capabilities of Captcha Solvers will only improve, making them an essential tool for modern web security.
**Solving reCAPTCHA manually takes a lot of time, especially when dealing with a large number of them. Using a captcha solver saves a significant amount of time, especially when it's solved with a high-speed technique. CaptchaAI provides a reCAPTCHA solving service with high speed, effectively addressing the problem of time wastage. Additionally, it saves money since it offers unlimited solves without charging per captcha. It's the first OCR solver in this regard.**
| media_tech | |
1,881,998 | Understanding MongoDB Aggregation: A Simple Guide 🚀 | MongoDB, one of the most popular NoSQL databases, offers powerful tools for data aggregation.... | 0 | 2024-06-09T10:53:40 | https://dev.to/raksbisht/understanding-mongodb-aggregation-a-simple-guide-1g4a | mongodb, aggregation, aggregationframework, tutorial | MongoDB, one of the most popular NoSQL databases, offers powerful tools for data aggregation. Aggregation is a process that allows you to transform and analyze data in your MongoDB collections. Whether you’re summarizing, filtering, or transforming data, MongoDB’s aggregation framework is incredibly versatile and powerful. This guide will take you through the essentials of MongoDB aggregation in a straightforward and easy-to-understand manner, using examples and practical applications. So, let’s dive in! 🌊
## What is Aggregation? 🤔
Aggregation in MongoDB is the process of computing and transforming data from multiple documents to obtain a summarized or computed result. It’s similar to the SQL GROUP BY statement but much more flexible and powerful. Aggregation operations process data records and return computed results, making it easier to gain insights from your data.
## Aggregation Pipeline 🛠️
The core of MongoDB’s aggregation framework is the aggregation pipeline. The pipeline is a series of stages that process documents. Each stage transforms the documents as they pass through the pipeline. The stages in the pipeline are executed in sequence, with the output of one stage serving as the input to the next.
## Basic Stages of the Aggregation Pipeline 📊
1. **$match**: Filters the documents to pass only those that match the specified condition(s).
2. **$group:** Groups documents by a specified identifier and applies an accumulator expression to each group.
3. **$project:** Reshapes each document in the stream, such as by adding or removing fields.
4. **$sort:** Sorts the documents in the order specified.
5. **$limit:** Limits the number of documents to pass through to the next stage.
6. **$skip:** Skips over a specified number of documents.
Let’s break down each of these stages with examples.
## $match Stage 🔍
The **$match** stage filters documents based on specified criteria. This is similar to the find method but used within the aggregation pipeline.
```
db.sales.aggregate([
{ $match: { status: "A" } }
])
```
In this example, only documents with a **status** of “A” are passed to the next stage.
## $group Stage 👥
The **$group** stage groups documents by a specified field and applies accumulator expressions to compute values for each group. Common accumulators include **$sum**, **$avg**, **$min**, **$max**, and **$push**.
```
db.sales.aggregate([
{ $group: { _id: "$customerId", total: { $sum: "$amount" } } }
])
```
Here, documents are grouped by **customerId**, and the total amount spent by each customer is calculated.
## $project Stage 📝
The **$project** stage reshapes each document by including, excluding, or adding new fields.
```
db.sales.aggregate([
{ $project: { item: 1, total: { $multiply: ["$price", "$quantity"] } } }
])
```
This example adds a new field **total** to each document, calculated as the product of **price** and **quantity**.
## $sort Stage 📈
The $sort stage sorts the documents based on specified criteria.
```
db.sales.aggregate([
{ $sort: { total: -1 } }
])
```
Documents are sorted by the **total** field in descending order.
## $limit Stage ⏳
The **$limit** stage restricts the number of documents passed to the next stage.
```
db.sales.aggregate([
{ $limit: 5 }
])
```
Only the first 5 documents are passed to the next stage.
## $skip Stage ⏭️
The **$skip** stage skips over a specified number of documents.
```
db.sales.aggregate([
{ $skip: 10 }
])
```
The first 10 documents are skipped, and processing starts from the 11th document.
## Combining Stages: An Example Pipeline 🛤️
To see how these stages work together, let’s create a more complex pipeline. Suppose we have a collection **sales** and we want to find the total sales amount for each customer, sort them by the total amount in descending order, and then limit the result to the top 5 customers.
```
db.sales.aggregate([
{ $match: { status: "A" } },
{ $group: { _id: "$customerId", total: { $sum: "$amount" } } },
{ $sort: { total: -1 } },
{ $limit: 5 }
])
```
Here’s what each stage does:
1. **$match**: Filters documents where **status** is “A”.
2. **$group**: Groups documents by **customerId** and calculates the total amount spent by each customer.
3. **$sort**: Sorts the groups by the total amount in descending order.
4. **$limit**: Limits the result to the top 5 customers.
## Aggregation Operators 🧮
Aggregation operators are the backbone of the aggregation framework. They perform operations on the data and can be used in various stages. Let’s look at some common operators:
## Arithmetic Operators
* **$add**: Adds values to produce a sum.
* **$subtract**: Subtracts one value from another.
* **$multiply**: Multiplies values to produce a product.
* **$divide**: Divides one value by another.
**Example:**
```
db.sales.aggregate([
{ $project: { item: 1, total: { $add: ["$price", "$tax"] } } }
])
```
**Array Operators 🧩**
* **$size**: Returns the size of an array.
* **$arrayElemAt**: Returns the element at a specified array index.
* **$push**: Adds an element to an array.
**Example**:
```
db.orders.aggregate([
{ $project: { itemsCount: { $size: "$items" } } }
])
```
**String Operators 🔤**
* **$concat**: Concatenates strings.
* **$substr**: Extracts a substring.
* **$toLower**: Converts a string to lowercase.
* **$toUpper**: Converts a string to uppercase.
**Example:**
```
db.customers.aggregate([
{ $project: { fullName: { $concat: ["$firstName", " ", "$lastName"] } } }
])
```
**Date Operators** 📅
* **$year**: Returns the year portion of a date.
* **$month**: Returns the month portion of a date.
* **$dayOfMonth**: Returns the day of the month portion of a date.
**Example:**
```
db.sales.aggregate([
{ $project: { year: { $year: "$date" } } }
])
```
**Conditional Operators** ⚖️
* **$cond**: A ternary operator that returns a value based on a condition.
* **$ifNull**: Returns a value if a field is null or missing.
Example:
```
db.inventory.aggregate([
{ $project: { status: { $cond: { if: { $gt: ["$qty", 0] }, then: "In Stock", else: "Out of Stock" } } } }
])
```
## Real-World Use Cases 🌍
To illustrate how aggregation can be applied in real-world scenarios, let’s explore a few examples.
**Example 1: Sales Reporting 📊**
Imagine you have a **sales** collection with documents that track sales transactions. You want to generate a monthly sales report showing the total sales amount for each month.
```
db.sales.aggregate([
{ $group: { _id: { year: { $year: "$date" }, month: { $month: "$date" } }, totalSales: { $sum: "$amount" } } },
{ $sort: { "_id.year": 1, "_id.month": 1 } }
])
```
**Example 2: Customer Segmentation 🎯**
You have a **customers** collection and want to segment customers based on their total spending. For instance, you want to classify customers into “High Spenders” and “Low Spenders”.
```
db.sales.aggregate([
{ $group: {_id: "$customerId", totalSpent: { $sum: "$amount" } } },
{ $project: { customerId: "$_id", totalSpent: 1, segment: { $cond: { if: { $gt: ["$totalSpent", 1000] }, then: "High Spender", else: "Low Spender" } } } }
])
```
**Example 3: Inventory Management 📦**
You have an **inventory** collection and want to identify items that need restocking. Let’s assume an item needs restocking if its quantity falls below 10.
```
db.inventory.aggregate([
{ $match: { qty: { $lt: 10 } } },
{ $project: { item: 1, qty: 1, needsRestocking: { $cond: { if: { $lt: ["$qty", 10] }, then: true, else: false } } } }
])
```
## Performance Considerations 🚀
While aggregation is powerful, it’s important to consider performance. Here are some tips to optimize your aggregation pipelines:
1. **Use Indexes**: Ensure that fields used in the **$match** stage are indexed.
2. **Filter Early**: Use the **$match** stage as early as possible to reduce the number of documents processed.
3. **Limit Data**: Use the **$project** stage to limit the fields passed through the pipeline.
4. **Monitor Performance**: Use the explain method to analyze the performance of your aggregation pipeline.
Example:
```
db.sales.aggregate([
{ $match: { status: "A" } },
{ $group: { _id: "$customerId", total: { $sum: "$amount" } } },
{ $sort: { total: -1 } },
{ $limit: 5 }
]).explain("executionStats")
```
## Conclusion 🎉
MongoDB’s aggregation framework is a powerful tool for data analysis and transformation. By understanding the basic stages of the aggregation pipeline and how to use aggregation operators, you can perform complex data manipulations and gain valuable insights from your data. Whether you’re generating reports, segmenting customers, or managing inventory, aggregation can help you achieve your goals efficiently.
Remember to consider performance optimization techniques to ensure your aggregation pipelines run smoothly. With practice and experimentation, you’ll become proficient in using MongoDB aggregation to unlock the full potential of your data. Happy aggregating! 🌟
Feel free to experiment with the examples provided and adapt them to your specific use cases. MongoDB’s aggregation framework offers endless possibilities for transforming and analyzing your data. | raksbisht |
1,881,997 | Software Testing QA | What is Software Testing? Software testing is the process of verifying and validating whether a... | 0 | 2024-06-09T10:53:08 | https://dev.to/syedalia21/software-testing-qa-4590 | **What is Software Testing?**
Software testing is the process of verifying and validating whether a software web or application is bug-free and meet user requirements. The main aim of the software testing is to identify missing requirements or mistakes.
**Why Software Testing Important?**
Because if there are any bugs or errors in the software, it can be identified early and can be solved before delivery of the software product.
**What do we need to know about Software Testing?**
Software testing contains many of features that we need to be knowledgeable of.
**Two way of Testing:**
1. _Manual Testing_ – Testing Team will manually verify each and every test cases without using any tools.
2. _Automation Testing_ – Testing Team will test that application using automation tool i.e. Selenium and advantage is save the execution one, we can run multiple time for same test cases
**Software Development Life Cycle**:
The SDLC is a process that defines the tasks that software developers perform to plan, design, develop, test, and deploy & maintenance software
**Why SDLC is important?**
The software development lifecycle (SDLC) is an important process for software development because it provides an organized approach to developing software. The SDLC assists in ensuring that software is produced in a uniform and effective manner that satisfies the needs of users and stakeholders
1. __Plan __– this is fundamental stage in SDLC and it’s done by BA and BA is keep it as per client requirements in BRS document. BRS is created to serve the purpose of guideline for the next phase of the cycle and BRS is communication between of each team.
2. __Define _Analyst_ - It has enough details to define a SRSD, user stories, or technical specifications for software programmers.
3. __Design_ _– There are two type of document design (HLD and LLD ) . The HLD contains overall Design, Designed by Designer. LLD contains information about HLD like platform, tools , database ( SQL, MySQL, Oracle, MongoDB,)
4. _Development_ – This phase on maintain by Developer. The start code for software
5. __Testing_ _– Tester will be performing on this phase and they will do end-end verify by follow STLC.
6. __Deploy_ _– This is development to production phase.
**What is the relevance of software testing?**
Software testing is improve the quality of the software and providing a high-quality product as meet client.
| syedalia21 | |
1,881,996 | Search & Replace Texts in DOCX | Hey guys, I have created a package name edit-office-file which can search & replace multiple... | 0 | 2024-06-09T10:53:00 | https://dev.to/satyajitnayak/search-replace-texts-in-docx-3o40 | javascript, editofficefile, docx, ooxml |
Hey guys, I have created a package name [edit-office-file](https://www.npmjs.com/package/edit-office-files) which can search & replace multiple text strings inside a DOCX file as well other office files.
1. First install the pkg: `npm i edit-office-files`.
2. Usage style:
```js
import {SearchAndReplace} from 'edit-office-files';
async function main() {
const searchTexts = ['Hello World', 'are You', 'coloured'];
const replacementTexts = ['REPLACEMENT1', 'REPLACEMENT2', 'REPLACEMENT3'];
const reader = new SearchAndReplace('assets/document.docx', searchTexts, replacementTexts, 'updated.docx');
await reader.process();
}
main();
```
Here is the [github link](https://github.com/satyajitnayk/edit-office-files) for the project.
| satyajitnayak |
1,881,995 | Best Amazon Scraper APIs To Check Out in 2024 | The E-commerce Industry was valued at 25.93 trillion $ and is expected to rise at 18.4% CAGR from... | 0 | 2024-06-09T10:44:29 | https://dev.to/serpdogapi/best-amazon-scraper-apis-to-check-out-in-2024-4e81 | amazon, programming, beginners, news | The E-commerce Industry was valued at 25.93 trillion $ and is expected to rise at 18.4% CAGR from 2024 to 2030([source](https://www.grandviewresearch.com/industry-analysis/e-commerce-market)). With this exponential rise of the e-commerce industry, Amazon has become the industry leader with a current market capitalization of more than 1.93 trillion $.
From this mammoth size, one can estimate the volume of products this particular company is handling per day and the huge load of data stored in their data centers including user data, product data, and many other things. However, getting this data from Amazon may not be an easy task for a lot of web scraping experts.
This is where Amazon Scraper APIs come into play. They are highly scalable and allow users to extract data from Amazon without facing any blockage issues.
In this article, we will list the 5 best-performing Amazon Scraper APIs that can be utilized for large-scale scraping to gather product information.
## The Top 5 Amazon Scraper APIs in 2024
### 1. EcommerceAPI
[EcommerceAPI](https://ecommerceapi.io/) tops our list of the best-performing Amazon Scraper APIs. Its highly scalable and robust API can be efficiently used for scraping Amazon Search, Product, and Reviews Pages.
It is the first dedicated provider in the industry to offer scraping services exclusively for e-commerce platforms, including Amazon, Walmart, Google Shopping, and more to come. It also supports the much-needed country-level targeting, allowing users to get accurate and precise results.
Here is the list of Amazon APIs offered by the EcommerceAPI:
**Amazon Search API** — To get the list of products from the Amazon Search Engine.
**Amazon Product API** — To get the product data in detail including its pricing, description, ratings and reviews, and much more.
**Amazon Reviews API** — To get customer reviews for a particular product.
**Amazon Autocomplete API** — To get the search suggestions for a given search query on Amazon.
**Features:**
1. Comprehensive documentation and integration with every major language.
2. It supports country-level targeting for all the marketplaces.
3. Structured JSON output for each API is available and it also offers custom changes in the API on customer demand.
4. Supports extra featured snippets on Amazon including sponsored brand videos, sponsored brand results, and brands related to that search.
**Pricing:**
Pricing starts from 30$ and offers 150k credits making it the most economical Amazon API in the market.
### 2. Scrapingdog
[Scrapingdog](https://scrapingdog.com/) is a web scraping company that also specializes in delivering Amazon Scraping Services to its customers. Their Amazon Scraper is based on a huge network of more than 40M+ residential and datacenter IPs with a higher success rate.
Scrapingdog’s Amazon Scraper API also supports country-level and postal-level targeting. Moreover, they already have a huge infrastructure to defy any anti-bot mechanism present on the website, as stated on their website, “You can focus on using the data, not collecting it”.
Scrapingdog parses data from Amazon Search and Product page and offers the following features:
1. Country and postal level targeting.
2. Structured JSON output.
3. It also supports featured snippets such as sponsored brands and brands related to the search.
**Pricing:**
Pricing starts from 40$ and offers 200k credits.
### 3. Oxylabs
[Oxylabs](https://oxylabs.io/) is another big data provider in the market that provides access to valuable Amazon data, such as pricing, product information, or reviews, on a large scale. Their API can be used for various purposes including Price and Product Monitoring, competitor monitoring, etc.
Additionally, their scraper is regularly maintained and they have created a parser for different types of pages on Amazon so that their scraper doesn’t break on layout changes.
Not only Amazon, but Oxylabs covers all the major e-commerce platforms including eBay, Etsy, Walmart, Flipkart, and many more.
**Features:**
1. Real-time data from any country.
2. JSON output for each type of layout is available.
3. Supports JS rendering.
**Pricing:**
Pricing starts from 49$ and offers 17.5k credits only.
### 4. BrightData
Every person in the data scraping industry may have heard of the name [BrightData](https://brightdata.com/). They are the biggest web scraping and proxy provider company in the industry, which offers dedicated scrapers for every major website known for collecting data by developers worldwide, including Amazon.
You can use both their proxies or dedicated API to scrape Amazon. However, the dedicated is preferred more due to the in-built bot-defying system.
The only disadvantage with their API is that they don’t provide structured JSON output making it harder to access the data and maintain the parser for each layout on the user end.
**Features:**
1. Country and city-level targeting.
2. JSON output.
3. The Amazon dataset is also available.
**Pricing:**
The pricing structure is not clearly defined however, it starts from 0.001 $ per record scraped.
### 5. Smartproxy
[Smarproxy](https://smartproxy.com/) is another proxy provider that offers a dedicated section for scraping e-commerce platforms including Amazon. Their Amazon API is known for its speed and quality and can be used just with a simple POST request.
Smarproxy not only provides data in JSON format but also CSV files for non-developers to test their API.
**Features:**
1. Country and city-level targeting.
2. JSON output and CSV output.
3. Featured sponsored results are available.
**Pricing:**
Pricing starts from 30$ and offers 15k credits.
## Conclusion
Amazon is generally scraped at a huge scale by businesses as the e-commerce industry is always changing dynamically. The best solution is that can handle millions of requests without any blockage and can serve you with precise and accurate data.
## Additional Resources
1. [Create An Application For Live Price Tracking](https://ecommerceapi.io/blog/create-an-app-for-live-price-tracking/)
2. [What is Amazon Data Scraping](https://ecommerceapi.io/blog/amazon-data-scraping-benefits-challenges/)
| serpdogapi |
1,881,994 | Building a NL2GraphQL using Lyzr SDK | As technology continues to evolve, the need for seamless communication between humans and machines... | 0 | 2024-06-09T10:44:27 | https://dev.to/akshay007/building-a-nl2graphql-using-lyzr-sdk-148o | ai, graphql, programming, python | As technology continues to evolve, the need for seamless communication between humans and machines becomes increasingly crucial. In the realm of databases, particularly GraphQL, translating human intent into machine-readable queries can often be challenging. Here at Lyzr, we aim to bridge that gap with our innovative application, **NL2GraphQL**. Built using the **Lyzr SDK**, this app effortlessly converts natural language prompts into accurate GraphQL queries, making database interactions smoother than ever before.
**GraphQL**, a query language for APIs, provides a powerful and flexible way to interact with your data. However, constructing GraphQL queries requires a certain level of expertise, which not everyone possesses. **NL2GraphQL** is designed to democratize access to GraphQL by allowing users to input natural language prompts and receive precise GraphQL queries in return. Whether you’re a developer looking to save time or a non-technical user needing to access data, NL2GraphQL is here to help.
**Why use Lyzr SDK’s?**
With **Lyzr SDKs**, crafting your own GenAI application is a breeze, requiring only a few lines of code to get up and running swiftly.
[Checkout the Lyzr SDK’s](https://docs.lyzr.ai/homepage)
**Lets get Started!**
Create an **app.py** file
```
import streamlit as st
from lyzr_automata.ai_models.openai import OpenAIModel
from lyzr_automata import Agent, Task
from lyzr_automata.pipelines.linear_sync_pipeline import LinearSyncPipeline
from PIL import Image
from lyzr_automata.tasks.task_literals import InputType, OutputType
import os
```
The code sets up a **Streamlit** web application for translating natural language prompts to GraphQL queries using Lyzr Automata and OpenAI’s GPT-4-turbo model. It imports necessary libraries, sets up the OpenAI API key, adjusts CSS styles for the app’s appearance, displays a logo, and introduces the app with a title and input field. An **OpenAIModel** instance is configured, and a function (generation) is defined to process user input into GraphQL queries.
```
# Set the OpenAI API key
os.environ["OPENAI_API_KEY"] = st.secrets["apikey"]
```
This line sets the **OpenAI API key** as an environment variable, retrieving it securely from Streamlit’s secrets for authentication.
```
input = st.text_input("Please enter your natural language prompt:",placeholder=f"""Type here""")
```
This line creates a text input field using Streamlit’s `text_input` function, prompting the user to enter their natural language prompt.
```
open_ai_text_completion_model = OpenAIModel(
api_key=st.secrets["apikey"],
parameters={
"model": "gpt-4-turbo-preview",
"temperature": 0.2,
"max_tokens": 1500,
},
)
```
This segment initializes an instance of the OpenAIModel class, which will be used to interact with OpenAI’s **GPT-4-turbo-preview model**. It requires an API key, retrieved from Streamlit’s secrets management using st.secrets["apikey"]. Additionally, it specifies parameters for the model, including the model type ("gpt-4-turbo-preview"), the temperature for generating text (set to 0.2 for moderate creativity), and the maximum number of **tokens** in the generated text (limited to 1500 to prevent overly lengthy responses).
```
def generation(input):
generator_agent = Agent(
role=" Expert GRAPH DATABASE ENGINEER and ANALYST",
prompt_persona=f"Your task is to TRANSLATE a natural language prompt into the corresponding GRAPHQL query, ensuring that it FULLY CAPTURES the user's intent expressed in natural language.")
prompt = f"""
You are an Expert GRAPH DATABASE ENGINEER and ANALYST. Your task is to TRANSLATE a natural language prompt into the corresponding GRAPHQL query, ensuring that it FULLY CAPTURES the user's intent expressed in natural language.
[Prompts here]
"""
```
The `generation` function is designed to facilitate the translation of natural language prompts into GraphQL queries. It begins by creating an `Agent` instance named `generator_agent`, which is configured with a specific role as an “**Expert GRAPH DATABASE ENGINEER and ANALYST**”. The agent is also provided with a prompt persona, specifying the task: to translate a natural language prompt into a corresponding GraphQL query while ensuring it fully captures the user’s intent.
A **prompt** string is then constructed, outlining the task in detail. It emphasizes the role of the agent and the importance of accurately translating user prompts into GraphQL queries that reflect the user’s intentions. This prompt serves as a guide for the agent’s processing of natural language input.
```
generator_agent_task = Task(
name="Generation",
model=open_ai_text_completion_model,
agent=generator_agent,
instructions=prompt,
default_input=input,
output_type=OutputType.TEXT,
input_type=InputType.TEXT,
).execute()
return generator_agent_task
```
In this code snippet, a task titled “Generation” is initiated using the Task class from the **Lyzr Automata** framework. It involves configuring the task with specific parameters, including the task name, the OpenAI model to be utilized, the agent for handling the task (generator_agent), prompt instructions, default input (likely representing the user’s natural language prompt), and specifications for the input and output types (text input and output).
Subsequently, the task is executed by calling the **execute()** method on the task object. This triggers the processing of the user’s input by the agent and the OpenAI model, resulting in the generation of a GraphQL query based on the provided input and instructions.
Finally, the function returns the resulting **generator_agent_task**, which presumably encapsulates the generated GraphQL query. This returned value can then be further processed or displayed as needed.
```
if st.button("Convert"):
solution = generation(input)
st.markdown(solution)
```
Upon clicking the “**Convert**” button, the function generation(input) is invoked with the user's input. This input undergoes processing to generate a GraphQL query. The resulting query, stored in the solution variable, is then presented within the app interface using Streamlit's markdown function.
**NL2GraphQL** is more than just a tool; it’s a step towards making complex database queries accessible to everyone. Whether you’re querying a database for development purposes or extracting critical information for decision-making, NL2GraphQL simplifies the process. Try it out and experience the ease of translating your natural language prompts into precise GraphQL queries.
**App link**: https://nl2graphql-lyzr.streamlit.app/
**Source Code**: https://github.com/isakshay007/NL2GraphQL
For any inquiries or issues, please contact Lyzr. You can learn more about Lyzr and their offerings through the following links:
**Website**: [Lyzr.ai](https://www.lyzr.ai/)
**Book a Demo**: [Book a Demo](https://www.lyzr.ai/book-demo/)
**Discord**: [Join our Discord community](https://discord.com/invite/nm7zSyEFA2)
**Slack**: [Join our Slack channel](https://anybodycanai.slack.com/join/shared_invite/zt-2a7fr38f7-_QDOY1W1WSlSiYNAEncLGw#/shared-invite/email) | akshay007 |
1,881,988 | Differences between primary, core and task nodes in Amazon EMR cluster | The key differences between primary, core, and task nodes in an Amazon EMR cluster are: Primary Node... | 0 | 2024-06-09T10:43:42 | https://dev.to/aws-builders/differences-between-primary-core-and-task-nodes-in-amazon-emr-cluster-pc6 | aws, emr, cluster, nodes | The key differences between primary, core, and task nodes in an Amazon EMR cluster are:
**Primary Node (also known as Master Node):**
- The primary node is responsible for coordinating the cluster and managing the execution of jobs.
- It runs the main Hadoop services, such as the JobTracker, NameNode, and ResourceManager.
- There is only one primary node in an EMR cluster.
- The primary node cannot be terminated during the lifetime of the cluster, as it is essential for the cluster's operation.
**Core Nodes:**
- Core nodes host the Hadoop Distributed File System (HDFS) and run the DataNode and TaskTracker services.
- They are responsible for storing and processing data in the cluster.
- Core nodes cannot be removed from the cluster without risking data loss, as they contain the persistent data in HDFS.
- You should reserve core nodes for the capacity that is required until your cluster completes.
**Task Nodes:**
- Task nodes are used for running tasks and do not host HDFS.
They can be added or removed from the cluster as needed, without the risk of data loss.
- Task nodes are ideal for handling temporary or burst workloads, as you can launch task instance fleets on Spot Instances to increase capacity while minimizing costs.
- The cluster will never scale below the minimum constraints set in the managed scaling policy.
Here's a table summarizing the key differences:
---
More details regarding,
1. Selecting and deploying an Amazon EMR cluster: click [here](https://docs.aws.amazon.com/prescriptive-guidance/latest/amazon-emr-hardware/select.html)
2. Estimating Amazon EMR cluster capacity: click [here](https://docs.aws.amazon.com/prescriptive-guidance/latest/amazon-emr-hardware/capacity.html) | nowsathk |
1,881,993 | JWT | JSON Web Token compact URL-safe means of representing claims to be transferred between two parties... | 0 | 2024-06-09T10:43:23 | https://dev.to/md_shariarhaque_11695a3/jwt-5d11 | JSON Web Token compact URL-safe means of representing claims to be transferred between two parties securely. These tokens are often used in authentication and authorization protocols.
1. Structure: JWTs consist of three parts separated by dots: Header, Payload, and Signature. These parts are base64url encoded JSON strings.
- Header: Contains information about the type of token (JWT) and the signing algorithm used.
- Payload: Contains the claims. Claims are statements about an entity (typically, the user) and additional data. There are three types of claims: registered, public, and private claims.
- Signature: To create the signature part, you need to take the encoded header, the encoded payload, a secret, the algorithm specified in the header, and sign that.
2. Authentication: When a user logs in, the server generates a JWT and sends it to the client. The client stores the token, usually in local storage or a cookie.
3. Authorization: When the client makes subsequent requests to the server, it includes the JWT in the request, typically in the Authorization header. The server then verifies the JWT to ensure it's valid and hasn't been tampered with. It then uses the information in the token to determine if the user is authorized to access the requested resources.
4. Statelessness: JWTs are stateless, meaning the server doesn't need to keep a record of the tokens it issues. This makes JWTs ideal for use in distributed systems and APIs.
5. Expiration: JWTs can have an expiration time (in the Payload), after which they're no longer considered valid. This adds an extra layer of security as even if a token is stolen, it will only be valid for a limited time.
6. Security: To ensure the integrity of the token, it's important to sign it using a secret key known only to the server. This prevents tampering with the token by unauthorized parties.
JWTs provide a flexible and secure way of transmitting information between parties and are widely used in modern web development for authentication and authorization purposes. | md_shariarhaque_11695a3 | |
1,881,992 | ติดตั้ง thai locale ใน CenOS/Alma/Rocky linux ใน docker | วันนี้ลองเล่น almalinux 9.4 image แล้วมันไม่ได้มี locale thai มาให้ จะติดตั้งก็ง่ายๆด้วยคำสั่ง... | 0 | 2024-06-09T10:43:10 | https://dev.to/pramoth/tidtang-thai-locale-ain-cenosalmarocky-linux-ain-docker-19n4 | วันนี้ลองเล่น almalinux 9.4 image แล้วมันไม่ได้มี locale thai มาให้ จะติดตั้งก็ง่ายๆด้วยคำสั่ง `localectl` เพราะว่าอยู่ใน container จึง research หาสักพักเลย จึงจะ note ไว้หน่อยละกัน
almalinux image ไม่ได้ใส่ avialable locale มาให้เรามันมีแค่ POSIX locale ดังนั้นเราต้องติดตั้งเพิ่ม เราเช็คได้ว่ามันมี avialable locale อะไรมาให้บ้างด้วย `locale -a`
ซึ่งจะมีแค่
```
[root@d121e84764c6 /]# locale -a
C
C.utf8
```
locale file ของ avialable locale Redhat จะอยู่ที่ และ `/usr/share/i18n/locales`
file chracter map จะอยู่ที่ `/usr/share/i18n/charmaps` ถ้าเรา `ls` ดูน่าจะยังไม่มีเลย
การติดตั้งก็หา package มาลงตามนี้
`yum -y install glibc-locale-source glibc-langpack-en glibc-langpack-th` ซึ่งภาษาไทยก็จะอยู่ใน package `glibc-langpack-th`
หลังจากติดตั้งแล้ว เราลอง list avialable locale อีกที
```
[root@13c0780e7ad2 /]# locale -a
...
...
th_TH
th_TH.utf8
```
จากนั้นเราก็ใช้ได้เลย โดย set environmant var LANG
`export LANG=th_TH`
แล้วเช็ค locale ของ current terminal เราด้วย `locale` จะได้ตามนี้
```
[root@13c0780e7ad2 /]# locale
LANG=th_TH.utf8
LC_CTYPE="th_TH.utf8"
LC_NUMERIC="th_TH.utf8"
LC_TIME="th_TH.utf8"
LC_COLLATE="th_TH.utf8"
LC_MONETARY="th_TH.utf8"
LC_MESSAGES="th_TH.utf8"
LC_PAPER="th_TH.utf8"
LC_NAME="th_TH.utf8"
LC_ADDRESS="th_TH.utf8"
LC_TELEPHONE="th_TH.utf8"
LC_MEASUREMENT="th_TH.utf8"
LC_IDENTIFICATION="th_TH.utf8"
LC_ALL=
```
เป็นอันว่าเรียบร้อย ที่เหลือก็ไปเซ็ตให้มันใช้ได้กับทุกๆ user ในไฟล์ `/etc/locale.conf` หรือ per user ในไฟล์ `$HOME/.i18n`
**note** locale package ของฝั่ง ubuntu จะเป็น **language-pack-XX**
**อ้างอิง**
https://stackoverflow.com/questions/58304278/how-to-fix-character-map-file-utf-8-not-found
https://access.redhat.com/solutions/974273
| pramoth | |
1,881,991 | Mastering CSS Unit Size Conversion: Simplify Your Workflow | When it comes to responsive web design, managing CSS unit sizes efficiently is crucial. Understanding... | 0 | 2024-06-09T10:43:02 | https://dev.to/gecschool/mastering-css-unit-size-conversion-simplify-your-workflow-112p | css, px, size | When it comes to responsive web design, managing CSS unit sizes efficiently is crucial. Understanding how to convert between different units can greatly enhance your design process. Among these conversions, px to rem is one of the most commonly used, especially for creating scalable and accessible web interfaces.
**Understanding px to rem Conversion**
The px (pixel) is a fixed unit representing a dot on the screen, which is an absolute measurement. On the other hand, rem (root em) is a relative unit that stands for the font size of the root element (usually the `<html>` element). The primary advantage of using rem over px is scalability. When you use rem units, you ensure that your design scales proportionally based on the root font size, making it more responsive.
Here’s a simple formula to convert px to rem:
\[ \text{rem} = \frac{\text{px}}{16} \]
For example:
- 16px = 1rem
- 32px = 2rem
- 48px = 3rem
Using rem units helps in maintaining consistency across different devices and ensures that your website remains accessible by allowing users to adjust the base font size according to their preferences.
**A Superior Solution: CSS Unit Size Converter**
While the basic conversion can be done manually or using simple online calculators, what if you need to convert an entire CSS file? Manually converting each unit is tedious and error-prone. This is where a comprehensive tool can make a significant difference.
I highly recommend checking out the CSS Unit Size Converter available at [css-nexus.com/SUC/px-to-rem](http://css-nexus.com/SUC/px-to-rem). Unlike other tools that only convert individual values, this site allows you to input your entire CSS code and automatically converts all the px values to rem (or any other unit you prefer). This feature can save you a tremendous amount of time and effort, ensuring accuracy and efficiency in your workflow.
**Features of CSS Nexus Unit Size Converter:**
- **Batch Conversion:** Convert entire CSS files at once.
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| gecschool |
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Xem thêm tại: https://tuvi.vn/lap-la-so-tu-vi | dongphuchh023 | |
1,881,989 | Comprehensive Guide to Debouncing in JavaScript: Improve Your Code Efficiency | Learn how to implement debouncing in JavaScript with practical examples and tips. Master the debounce... | 0 | 2024-06-09T10:34:54 | https://dev.to/dipakahirav/understanding-debouncing-in-javascript-5g30 | javascript, webdev, programming, debouncing | Learn how to implement debouncing in JavaScript with practical examples and tips. Master the debounce function and improve your web performance.
please subscribe to my [YouTube channel](https://www.youtube.com/@DevDivewithDipak?sub_confirmation=1
) to support my channel and get more web development tutorials.
In this comprehensive guide, we will explore debouncing in JavaScript, understand its importance, and learn how to implement it effectively. Whether you are a beginner or an experienced developer, mastering debouncing can significantly improve your web performance.
Debouncing is a programming practice used to ensure that a time-consuming task does not fire so often, improving performance and user experience. It's particularly useful in scenarios like window resizing, button clicking, or form input events, where multiple rapid events need to be controlled.
### What is Debouncing?
Debouncing is a technique to limit the rate at which a function is executed. When multiple events are triggered in quick succession, the debounce function will ensure that only the last event in the series triggers the function execution after a specified delay.
### Why Use Debouncing?
- **Performance Optimization**: Prevents performance issues by reducing the number of times a function is called.
- **Enhanced User Experience**: Avoids the clutter of repeated actions, providing a smoother experience.
- **Network Efficiency**: Reduces unnecessary network requests when used with event handlers like input fields for live search.
### How Debouncing Works
Imagine a user typing in a search box that triggers an API call for each keystroke. Without debouncing, each keystroke would result in a new API call, flooding the network with requests. With debouncing, only the final input after the user stops typing for a specified duration will trigger the API call.
### Implementing Debouncing in JavaScript
Here is a simple implementation of a debounce function:
```javascript
function debounce(func, wait) {
let timeout;
return function executedFunction(...args) {
const later = () => {
clearTimeout(timeout);
func(...args);
};
clearTimeout(timeout);
timeout = setTimeout(later, wait);
};
}
```
### Usage Example
Let's see how we can use the `debounce` function in a real-world scenario:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Debouncing Example</title>
</head>
<body>
<input type="text" id="searchBox" placeholder="Type to search...">
<script>
const searchBox = document.getElementById('searchBox');
function fetchSuggestions(query) {
console.log('Fetching suggestions for:', query);
// Simulate an API call
}
const debouncedFetchSuggestions = debounce(fetchSuggestions, 300);
searchBox.addEventListener('input', (event) => {
debouncedFetchSuggestions(event.target.value);
});
function debounce(func, wait) {
let timeout;
return function executedFunction(...args) {
const later = () => {
clearTimeout(timeout);
func(...args);
};
clearTimeout(timeout);
timeout = setTimeout(later, wait);
};
}
</script>
</body>
</html>
```
In this example:
- An input field captures the user's input.
- The `fetchSuggestions` function is debounced with a delay of 300 milliseconds.
- As the user types, the `debouncedFetchSuggestions` function is called, ensuring that `fetchSuggestions` is only executed once the user stops typing for 300 milliseconds.
### Conclusion
Debouncing is a simple yet powerful technique to optimize the performance of web applications. By controlling the rate of function execution, it helps in reducing unnecessary computations and improving the overall user experience. Whether you're handling search inputs, resizing windows, or dealing with other rapid events, debouncing can be a valuable tool in your JavaScript arsenal.
*Follow me for more tutorials and tips on web development. Feel free to leave comments or questions below!*
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1,881,987 | Understand the Liskov substitution principle using a simple example. | Imagine you're building a delivery system. Consider an entity class Vehicle and its subclass... | 0 | 2024-06-09T10:24:44 | https://dev.to/muhammad_salem/understand-the-liskov-substitution-principle-using-a-simple-example-3apo | Imagine you're building a delivery system.
Consider an entity class Vehicle and its subclass Car.
```csharp
public class Vehicle
{
public virtual void StartEngine()
{
// General engine start logic
}
public virtual void LoadCargo(int weight)
{
// General cargo loading logic
}
}
public class Car : Vehicle
{
public override void StartEngine()
{
// Car-specific engine start logic
}
public override void LoadCargo(int weight)
{
if (weight > 500)
{
throw new InvalidOperationException("Cars cannot carry more than 500kg");
}
// Car-specific cargo loading logic
}
}
```
The code violates the Liskov Substitution Principle (LSP) because of the `LoadCargo` method in the `Car` class. Here's why:
1. **Base Class Contract:** The base class `Vehicle` defines a `LoadCargo(int weight)` method with seemingly generic cargo loading logic. This implies any `Vehicle` can handle loading cargo of any weight.
2. **Derived Class Restriction:** The derived class `Car` overrides `LoadCargo` and introduces a weight limit of 500kg. This contradicts the base class contract by throwing an exception for weights exceeding the limit.
3. **Substitutability Issue:** If you use a `Car` object anywhere that expects a `Vehicle` for cargo loading, you might encounter unexpected behavior (the exception) when the weight exceeds 500kg. This breaks the principle of seamless substitution.
**How to Fix the Violation:**
**Solution : Refine Base Class Contract (Weight Limit Property):**
```csharp
public class Vehicle
{
public virtual int MaxWeightLimit { get { return int.MaxValue; } } // Default unlimited weight
public virtual void StartEngine()
{
// General engine start logic
}
public virtual void LoadCargo(int weight)
{
if (weight > MaxWeightLimit)
{
throw new InvalidOperationException("Vehicle cannot carry more than its weight limit");
}
// General cargo loading logic
}
}
public class Car : Vehicle
{
public override int MaxWeightLimit { get { return 500; } }
public override void StartEngine()
{
// Car-specific engine start logic
}
public override void LoadCargo(int weight)
{
// Car-specific cargo loading logic (can be empty if no specific logic needed)
}
}
```
**Explanation:**
- We introduce a `MaxWeightLimit` property in the base class `Vehicle` with a default value of `int.MaxValue` (effectively unlimited).
- The base class `LoadCargo` method now checks against `MaxWeightLimit`.
- The `Car` class overrides `MaxWeightLimit` to set its specific limit of 500kg.
- This way, both `Vehicle` and `Car` consistently handle weight limits through the base class contract, adhering to LSP.
| muhammad_salem | |
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1,881,953 | Best Omegle Alternatives for 2023 | Omegle has been a go-to platform for random video and text chatting with strangers. However, concerns... | 0 | 2024-06-09T10:16:22 | https://dev.to/raza_strom_010020543a0dc6/best-omegle-alternatives-for-2023-44ie | Omegle has been a go-to platform for random video and text chatting with strangers. However, concerns over safety, moderation, and user experience have led many to seek better alternatives. Here are some of the [best Omegle alternatives for 2023](https://talkwithstranger.com/free-chat-rooms/omegle-alternative-stranger-chat-site) that offer enhanced features, improved security, and unique chatting experiences.
1. Chatroulette
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2. Chatrandom
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Social Networking: Add friends and keep in touch over time.
Conclusion
While Omegle remains a popular platform for online chatting, these alternatives offer a range of features that can enhance your experience. Whether you prefer random video chats, interest-based conversations, or community-focused group chats, platforms like Chatroulette, Chatrandom, Shagle, Ome.tv, Chatspin, Emerald Chat, Camsurf, ChatHub, Tinychat, and FaceFlow provide diverse and secure options. Explore these websites in 2023 to find the perfect platform for meeting new people in a safe and enjoyable manner. | raza_strom_010020543a0dc6 | |
1,881,952 | Ponytail Hair Extensions: A Perfect Solution for Instant Glamour | One of the concerns often associated with traditional hair extensions is the potential for damage to... | 0 | 2024-06-09T10:12:27 | https://dev.to/cskeisari665/ponytail-hair-extensions-a-perfect-solution-for-instant-glamour-1g45 | One of the concerns often associated with traditional hair extensions is the potential for damage to natural hair caused by adhesive bonds, heat application, or constant tension. Ponytail extensions, however, provide a damage-free solution that allows you to enjoy the benefits of longer, fuller hair without compromising the health of your natural locks. Because they are designed to be clipped onto the hair rather than bonded or glued, ponytail extensions pose minimal risk of damage when applied and removed correctly.
Affordable Luxury
While professional hair extensions can be costly and require regular maintenance to upkeep, ponytail extensions offer an affordable alternative that delivers instant results without breaking the bank. Whether you choose synthetic or human hair extensions, ponytail extensions are available in a wide range of price points to suit any budget. This accessibility makes it easy for anyone to indulge in the luxury of long, voluminous hair without overspending.
Boost of Confidence
There’s something undeniably empowering about having a fabulous hairstyle that makes you feel confident and beautiful. Whether you’re attending a glamorous event, going on a hot date, or simply stepping out for a night on the town, ponytail extensions can give you that extra boost of confidence you need to conquer the day. With your hair looking its absolute best, you can walk tall and exude confidence in every step you take.
https://pahairextensions.com/en-us/collections/tape-hair-extensions | cskeisari665 | |
1,881,951 | Image Scraping with HtmlAgilityPack: A Practical Guide Using ConsoleWebScraper | Image Scraping with HtmlAgilityPack: A Practical Guide Using ConsoleWebScraper Web scraping is a... | 0 | 2024-06-09T10:11:00 | https://dev.to/themysteriousstranger90/image-scraping-with-htmlagilitypack-a-practical-guide-using-consolewebscraper-57km | csharp, dotnet, webscraping, webdev | **Image Scraping with HtmlAgilityPack: A Practical Guide Using ConsoleWebScraper**
Web scraping is a valuable tool for automating the collection of information from websites. My simple, open-source ConsoleWebScraper application, available on [GitHub](https://github.com/TheMysteriousStranger90/ConsoleWebScraper) and [SourceForge](https://sourceforge.net/projects/consolewebscraper/), demonstrates how to use the HtmlAgilityPack library to scrape images from web pages. This guide will focus on the image scraping capabilities of the application and provide an overview of its core functionality.
**Introduction to HtmlAgilityPack**
HtmlAgilityPack is a .NET library that simplifies HTML parsing, making it a favorite among developers for web scraping tasks. It provides a robust way to traverse and manipulate HTML documents. With HtmlAgilityPack, extracting elements like images and text from web pages becomes straightforward and efficient.
**Why Scrape Images?**
Images are a significant part of web content, used for various purposes such as visual data representation, marketing, and documentation. Scraping images can be useful for creating archiving content, or monitoring website changes. ConsoleWebScraper application serves as a simple example to demonstrate how you can automate this process using HtmlAgilityPack.
**Key Features of ConsoleWebScraper**
ConsoleWebScraper offers a few essential functionalities:
URL Input: Prompts the user to enter a URL and retrieves the HTML content.
HTML Parsing: Extracts inner URLs and images from the HTML content.
File Saving: Saves scraped URLs, images, and HTML content (with tags removed) to separate files for easy access and further analysis.
**Additional Functionalities**
Before diving into the core image scraping method, it's helpful to understand the broader functionality of the ConsoleWebScraper application, which includes several supporting methods and classes.
Another classes :
The Client class manages the interaction with the user and controls the application's flow. It listens for user commands and executes the appropriate actions
The Printer class provides simple methods to display the application's start page and main menu to the user.
The Controller class orchestrates the scraping process, managing user input, folder creation, and invoking the web scraper service methods.
The HtmlTags class provides a method to remove HTML tags from the content, leaving only the text.
The IWebScraperService interface defines methods for saving URLs, content, and images, which are implemented in the WebScraperService class.
**The Core Method: SaveImagesToDoc**
The heart of the image scraping functionality is encapsulated in the SaveImagesToDoc method. Let's dive deeper into this method to understand how it works.
```
public async Task SaveImagesToDoc(string fileName, string htmlContent, string baseUrl)
{
// Create directory to save images
Directory.CreateDirectory(fileName);
// Load HTML content into HtmlDocument
var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(htmlContent);
// Extract image URLs
var images = doc.DocumentNode.Descendants("img")
.Select(e => e.GetAttributeValue("src", null))
.Where(src => !string.IsNullOrEmpty(src))
.Select(src => new Uri(new Uri(baseUrl), src).AbsoluteUri)
.ToList();
// Initialize HttpClient
using (HttpClient client = new HttpClient())
{
int pictureNumber = 1;
foreach (var img in images)
{
try
{
// Download image as byte array
var imageBytes = await client.GetByteArrayAsync(img);
// Get image file extension
var extension = Path.GetExtension(new Uri(img).AbsolutePath);
// Save image to file
await File.WriteAllBytesAsync($"{fileName}\\Image{pictureNumber}{extension}", imageBytes);
pictureNumber++;
}
catch (Exception ex)
{
// Log any errors
Console.WriteLine($"Failed to download or save image {img}: {ex.Message}");
}
}
}
}
```
**Step-by-Step Breakdown**
- Create Directory: The method starts by creating a directory to store the downloaded images.
```
Directory.CreateDirectory(fileName);
```
- Load HTML Content: It then loads the provided HTML content into an HtmlDocument object from the HtmlAgilityPack library.
```
var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(htmlContent);
```
- Extract Image URLs: The method identifies all img elements in the HTML and extracts their src attributes. It converts these relative URLs to absolute URLs using the base URL of the web page.
```
var images = doc.DocumentNode.Descendants("img")
.Select(e => e.GetAttributeValue("src", null))
.Where(src => !string.IsNullOrEmpty(src))
.Select(src => new Uri(new Uri(baseUrl), src).AbsoluteUri)
.ToList();
```
- Download and Save Images: Using HttpClient, the method iterates through the list of image URLs, downloads each image as a byte array, and saves it to the designated directory with an appropriate file extension. Errors during the download or save process are caught and logged.
```
using (HttpClient client = new HttpClient())
{
int pictureNumber = 1;
foreach (var img in images)
{
try
{
var imageBytes = await client.GetByteArrayAsync(img);
var extension = Path.GetExtension(new Uri(img).AbsolutePath);
await File.WriteAllBytesAsync($"{fileName}\\Image{pictureNumber}{extension}", imageBytes);
pictureNumber++;
}
catch (Exception ex)
{
Console.WriteLine($"Failed to download or save image {img}: {ex.Message}");
}
}
}
```
**Conclusion**
The ConsoleWebScraper application demonstrates the fundamental use of the HtmlAgilityPack library to scrape images from web pages. Despite its simplicity, the tool offers basic functions, making it a good solution for entry-level tasks. By automating image extraction and storage, you can streamline your data collection efforts. Happy scraping!
| themysteriousstranger90 |
1,881,950 | How do you create a full CRUD GraphQL API for posts in Nest JS? | Sure! I'll guide you through creating a GraphQL API endpoint for posts in an existing NestJS project.... | 0 | 2024-06-09T10:10:32 | https://dev.to/nadim_ch0wdhury/how-do-you-create-a-full-crud-graphql-api-for-posts-in-nest-js-4l1k | Sure! I'll guide you through creating a GraphQL API endpoint for posts in an existing NestJS project. Here are the steps you need to follow:
1. **Install necessary dependencies:**
First, ensure you have the necessary GraphQL dependencies installed in your NestJS project. Run the following command in your project directory:
```bash
npm install @nestjs/graphql graphql-tools graphql apollo-server-express
```
2. **Set up GraphQL module:**
In your `app.module.ts`, import and configure the GraphQL module:
```typescript
import { Module } from '@nestjs/common';
import { GraphQLModule } from '@nestjs/graphql';
import { ApolloDriver, ApolloDriverConfig } from '@nestjs/apollo';
import { join } from 'path';
import { PostsModule } from './posts/posts.module'; // Ensure this path is correct
@Module({
imports: [
GraphQLModule.forRoot<ApolloDriverConfig>({
driver: ApolloDriver,
autoSchemaFile: join(process.cwd(), 'src/schema.gql'),
}),
PostsModule,
],
})
export class AppModule {}
```
3. **Create the Posts module, service, and resolver:**
Generate the posts module, service, and resolver using the Nest CLI:
```bash
nest generate module posts
nest generate service posts
nest generate resolver posts
```
4. **Define the Post entity:**
Create a `post.entity.ts` file inside the `posts` directory with the following content:
```typescript
export class Post {
id: number;
title: string;
content: string;
}
```
5. **Create Post DTOs:**
Create `create-post.input.ts` and `update-post.input.ts` inside the `posts` directory:
```typescript
// create-post.input.ts
import { InputType, Field } from '@nestjs/graphql';
@InputType()
export class CreatePostInput {
@Field()
title: string;
@Field()
content: string;
}
```
```typescript
// update-post.input.ts
import { InputType, Field, Int, PartialType } from '@nestjs/graphql';
@InputType()
export class UpdatePostInput extends PartialType(CreatePostInput) {
@Field(() => Int)
id: number;
}
```
6. **Update the Post service:**
Implement the necessary methods in `posts.service.ts`:
```typescript
import { Injectable } from '@nestjs/common';
import { CreatePostInput } from './dto/create-post.input';
import { UpdatePostInput } from './dto/update-post.input';
import { Post } from './entities/post.entity';
@Injectable()
export class PostsService {
private posts: Post[] = [];
private idCounter = 1;
create(createPostInput: CreatePostInput): Post {
const newPost = { id: this.idCounter++, ...createPostInput };
this.posts.push(newPost);
return newPost;
}
findAll(): Post[] {
return this.posts;
}
findOne(id: number): Post {
return this.posts.find(post => post.id === id);
}
update(id: number, updatePostInput: UpdatePostInput): Post {
const postIndex = this.posts.findIndex(post => post.id === id);
if (postIndex === -1) return null;
this.posts[postIndex] = { ...this.posts[postIndex], ...updatePostInput };
return this.posts[postIndex];
}
remove(id: number): Post {
const postIndex = this.posts.findIndex(post => post.id === id);
if (postIndex === -1) return null;
const removedPost = this.posts.splice(postIndex, 1);
return removedPost[0];
}
}
```
7. **Define the Post resolver:**
Implement the resolver in `posts.resolver.ts`:
```typescript
import { Resolver, Query, Mutation, Args, Int } from '@nestjs/graphql';
import { PostsService } from './posts.service';
import { Post } from './entities/post.entity';
import { CreatePostInput } from './dto/create-post.input';
import { UpdatePostInput } from './dto/update-post.input';
@Resolver(of => Post)
export class PostsResolver {
constructor(private readonly postsService: PostsService) {}
@Mutation(() => Post)
createPost(@Args('createPostInput') createPostInput: CreatePostInput) {
return this.postsService.create(createPostInput);
}
@Query(() => [Post], { name: 'posts' })
findAll() {
return this.postsService.findAll();
}
@Query(() => Post, { name: 'post' })
findOne(@Args('id', { type: () => Int }) id: number) {
return this.postsService.findOne(id);
}
@Mutation(() => Post)
updatePost(@Args('updatePostInput') updatePostInput: UpdatePostInput) {
return this.postsService.update(updatePostInput.id, updatePostInput);
}
@Mutation(() => Post)
removePost(@Args('id', { type: () => Int }) id: number) {
return this.postsService.remove(id);
}
}
```
8. **Update the Posts module:**
Ensure the `posts.module.ts` includes the service and resolver:
```typescript
import { Module } from '@nestjs/common';
import { PostsService } from './posts.service';
import { PostsResolver } from './posts.resolver';
@Module({
providers: [PostsService, PostsResolver],
})
export class PostsModule {}
```
9. **Define the GraphQL schema:**
Ensure your `post.entity.ts` is decorated with GraphQL decorators:
```typescript
import { ObjectType, Field, Int } from '@nestjs/graphql';
@ObjectType()
export class Post {
@Field(() => Int)
id: number;
@Field()
title: string;
@Field()
content: string;
}
```
Now, you should have a fully functional GraphQL API for managing posts in your NestJS project. You can start your server and access the GraphQL playground at `http://localhost:3000/graphql` to test your queries and mutations.
Disclaimer: This content is generated by AI. | nadim_ch0wdhury | |
1,881,487 | Debouncing in JavaScript | Debouncing in General term Debouncing is a technique in programming that helps prevent... | 0 | 2024-06-09T10:03:10 | https://dev.to/mrhimanshusahni/debouncing-in-javascript-2p3o | javascript, webdev, learning, tutorial | ## Debouncing in General term
**Debouncing** is a technique in programming that helps prevent time-consuming tasks from being triggered so frequently that they slow down the performance of a web page. In simpler terms, it controls how often a function is called.
## What is Debouncing in JavaScript? 🤔
In JavaScript, **debouncing** is commonly used to enhance browser performance. Sometimes, certain actions on a web page involve complex computations that take up time. If these actions are triggered too frequently, it can significantly impact the browser's performance, especially since JavaScript operates on a single thread.
> **For Example:** Suppose we have a Search Input on the main page of a website that shows suggestions as the user types. Let's call a function to fetch suggestions on every keystroke. We might end up making too many requests to the backend server, which can slow down the application, waste resources, and, more importantly, affect User Experience. Instead, we can use debouncing to wait until the user has stopped typing for a while before making the request.
## How to implement debouncing in JavaScript? 😮
The most common way to implement debouncing in JavaScript is to use a **wrapper function that returns a new function that delays the execution of the original function.**
> Debouncing accepts a function and transforms it in to an updated (debounced) function so that the code inside the original function is executed after a certain period of time. If the debounced function is called again within that period, the previous timer is reset and a new timer is started for this function call. The process repeats for each function call.
Suppose we have a function `getData()` that needs to execute after say's `300ms`
Let's implement a debounce wrapper
1. Create a **`index.js`** file
**How to use debounce function to use with original `getData()` function**
## Debounce Implementation using a Custom Hook
> The advantage of custom hooks is that you can reuse the same logic throughout your application. It is highly advisable to do so.
**Usage of debounce in hook with the above example**
**In the above example:**, we have type **`laptop`** as the input keyword, it has 6 words so 6 times **`onChange`** Event is triggered **_but using the debounce technique we delay this function call after the user has finished typing or delay between 2 key press is greater than delay timer pass in debounce function._**
## Use Case of Debouncing/Real-life examples of Debouncing
1. **Google Search:** Auto-complete functionality.
2. **Elevator:** When you press the button to call the elevator, it doesn’t move immediately, but waits for a few seconds to see if anyone else wants to get on or off. This way, it avoids going up and down too frequently and saves energy and time.
## Conclusion
> **Debouncing** is a useful technique to optimize web applications by reducing unnecessary or repeated function calls that might affect the performance or user experience.
Debouncing uses the important concept of **_closures_**.
I hope you found this blog helpful and learned something new about Debouncing in JavaScript.
KeepLearning, Happy_Coding
Thanks for Reading 😀🤩
| mrhimanshusahni |
1,881,948 | Top 10 Laravel Collection Methods You Have Never Used. | In this article series, we go a little deeper into parts of Laravel we all use, to uncover functions... | 27,571 | 2024-06-09T10:03:08 | https://backpackforlaravel.com/articles/tips-and-tricks/top-10-collection-methods-you-have-never-used | laravel, php, programming | In this article series, we go a little deeper into parts of Laravel we all use, to uncover functions and features that we can use in our next projects... if only we knew about them!
Here are a few lesser-known collection methods that can be quite handy in various real-world scenarios:
1. **macro()**: This lets you add custom methods to Laravel collections that can be used on any collection instance:
```php
use Illuminate\Support\Collection;
Collection::macro('customMethod', function () {
// Your custom method logic
});
$collection = collect([...]);
// use on any collection object
$result = $collection->customMethod();
```
2. **concat()**: Suppose you have two collections of users from different sources and want to combine them into a single collection. You can use `concat` for this purpose:
```php
$usersFromDatabase = User::where(...)->get();
$usersFromApi = collect([...]);
$combinedUsers = $usersFromDatabase->concat($usersFromApi);
```
3. **pad()**: You have a collection of tasks, but you want to ensure that it always contains a minimum number of elements. You can use `pad` to add dummy tasks if necessary:
```php
$tasks = collect([...]);
$paddedTasks = $tasks->pad(10, 'Dummy Task');
```
4. **shuffle()** & **random()**: Suppose you have a quiz application and want to shuffle the order of the questions. You can use `shuffle` for this purpose. Additionally, if you're going to select a question from the collection randomly, you can use `random`:
```php
$questions = collect([...]);
$shuffledQuestions = $questions->shuffle();
$randomQuestion = $questions->random();
```
5. **crossJoin()**: Suppose you've two collections and you want to generate all possible combinations from them.
```php
$collection = collect([1, 2]);
$matrix = $collection->crossJoin(['a', 'b']);
$matrix->all();
/*[
[1, 'a'],
[1, 'b'],
[2, 'a'],
[2, 'b'],
]*/
$collection = collect([1, 2]);
$matrix = $collection->crossJoin(['a', 'b'], ['I', 'II']);
$matrix->all();
/*[
[1, 'a', 'I'],
[1, 'a', 'II'],
[1, 'b', 'I'],
[1, 'b', 'II'],
[2, 'a', 'I'],
[2, 'a', 'II'],
[2, 'b', 'I'],
[2, 'b', 'II'],
] */
```
6. **partition()**: Imagine you have a collection of students, and you want to partition them into two groups based on their grades (pass or fail). `partition` makes this easy:
```php
$students = collect([...]);
list($passingStudents, $failingStudents) = $students->partition(function ($student) {
return $student->grade >= 60;
});
```
7. **first()** and **firstWhere()**: You have a collection of tasks, and you want to retrieve the first task or the first task that meets certain criteria. `first` and `firstWhere` come in handy:
```php
$tasks = collect([...]);
$firstTask = $tasks->first();
$urgentTask = $tasks->firstWhere('priority', 'urgent');
```
8. **keyBy()**: You have a collection of users, and you want to index them by their unique IDs for quick access. `keyBy` is the solution:
```php
$users = collect([...]);
$indexedUsers = $users->keyBy('id');
```
9. **filter()**: You have a collection of orders coming from API and you want to filter out the canceled orders. The `filter` method is perfect for this:
```php
$orders = collect([...]);
$validOrders = $orders->filter(function ($order) {
return $order->status !== 'canceled';
});
```
10. **transform()**: You have a collection of tasks, and you want to modify each task in some way. `transform` allows you to apply a callback to each item to replace it:
```php
$tasks = collect([...]);
$tasks->transform(function ($task) {
return $task->name . ' - ' . $task->priority;
});
```
---
That's all for now, folks! These methods offer ease & flexibility that can be useful when working with Laravel applications.
All the above have been previously shared on our Twitter, one by one. [Follow us on Twitter](https://twitter.com/laravelbackpack); You'll ❤️ it. You can also check the first article of the series, which is on [Top 5 Scheduler Functions you might not know about](https://backpackforlaravel.com/articles/tips-and-tricks/laravel-advanced-top-5-scheduler-functions-you-might-not-know-about). Keep exploring, keep coding, and keep pushing the boundaries of what you can achieve. | karandatwani92 |
1,881,945 | How to Download Files from Firebase Storage Using JavaScript | Learn how to programmatically download files from Firebase Storage using JavaScript, complete with code snippets and practical explanations. | 0 | 2024-06-09T10:00:32 | https://dev.to/itselftools/how-to-download-files-from-firebase-storage-using-javascript-4292 | javascript, firebase, webdev, programming |
Through our experience at [itselftools.com](https://itselftools.com), where we have built over 30 applications using technologies like Next.js and Firebase, we've gained significant expertise in handling common but critical tasks efficiently. One such task is downloading files from Firebase Storage, which is something many developers struggle with initially. This article aims to demystify the process using a practical JavaScript example.
## Understanding the Code Snippet
```
// Download File with Firebase Storage Reference
storageRef.child('images/myphoto.jpg').getDownloadURL().then((url) => {
const xhr = new XMLHttpRequest();
xhr.responseType = 'blob';
xhr.onload = (event) => { const blob = xhr.response; };
xhr.open('GET', url);
xhr.send();
}).catch((error) => {
console.error('Failed to download file:', error);
});
```
### Step-by-Step Explanation
1. **Firebase Storage Reference:** First, a reference to the file located in Firebase Storage is obtained using `storageRef.child('images/myphoto.jpg')`. Here, 'images/myegnophoto.jpg' is the path where your file is stored in Firebase.
2. **Get Download URL:** The `getDownloadURL()` method is invoked on the file reference. This method is asynchronous and returns a promise that resolves with the URL from which the file can be accessed.
3. **XMLHttpRequest Setup:** Once the URL is obtained, an XMLHttpRequest object is created. This object is used to make a network request to retrieve the file. The response type is set to 'blob' since we are expecting a binary file (like an image).
4. **Handling the Response:** The `xhr.onload` function handles what happens once the file has been retrieved. Here, the response (`xhr.response`) contains the blob of the file downloaded.
5. **Error Handling:** The `catch` block catches and logs any errors that occur during the process, such as failing to retrieve the download URL or network issues during the download.
## Practical Usage Scenarios
This approach is exceptionally practical when you need to programmatically retrieve files stored in Firebase for your web applications, whether they be images, documents, or other media types.
## Conclusion
By understanding how to work with Firebase Storage and using basic XMLHttpRequest requests, developers can easily integrate file download functionalities into their applications. To see similar code in action, check out some of the apps we've developed, such as [find dynamic words easily](https://find-words.com), [test your web camera](https://webcam-test.com), and [discover descriptive words](https://adjectives-for.com).
We hope this article helps you manage your files in Firebase more effectively and enhances your web development skills. | antoineit |
1,881,943 | أدوات لإنشاء منتجات التجميع وإدارتها بسهولة | الميزات الرئيسية عند انشاء متجر الكتروني بـ مكلف تم تصميم برنامج مكلف مع مراعاة المرونة والوظائف ،... | 0 | 2024-06-09T09:55:10 | https://dev.to/engmuhammed_alsulami_e46/dwt-lnsh-mntjt-ltjmy-wdrth-bshwl-3n02 | الميزات الرئيسية عند [انشاء متجر الكتروني](https://mukalaf.com.sa/) بـ مكلف
تم تصميم [برنامج مكلف](https://mukalaf.com.sa/) مع مراعاة المرونة والوظائف ، مما يوفر لك أدوات لإنشاء منتجات التجميع وإدارتها بسهولة.
[انشاء منتج مجمع](https://mukalaf.com.sa/) : يتضمن برنامج مكلف واجهة سهلة الاستخدام تتيح لك [إنشاء منتجات التجميع](https://mukalaf.com.sa/) دون عناء. ما عليك سوى تحديد العناصر الفردية التي تريد تجميعها معا ، وتعيين استراتيجية التسعير ، وتخصيص تفاصيل العرض.
خيارات التسعير الديناميكية : حدد أسعارا ثابتة للمجموعات أو قدم أسعارا ديناميكية بناء على خصومات العناصر الفردية. يمكنك أيضا تنفيذ التسعير المتدرج لتقديم صفقات أفضل حيث يشتري العملاء المزيد.
مزامنة [المخزون](https://mukalaf.com.sa/) : يضمن نظامنا مزامنة مستويات المخزون في الوقت الفعلي ، لذلك عند شراء منتج مجمع ، يتم تحديث مخزون كل عنصر على حدة تلقائيا. تساعد هذه الميزة في منع البيع الزائد والحفاظ على دقة مستويات مخزونك.
الأدوات الترويجية : استفد من الأدوات الترويجية المضمنة لتسليط الضوء على منتجات التجميع على موقع الويب الخاص بك. استخدم اللافتات والنوافذ المنبثقة والأقسام الخاصة للفت الانتباه إلى هذه العروض الجذابة.
تحليلات شاملة: احصل على رؤى حول أداء منتجات التجميع الخاصة بك من خلال التحليلات التفصيلية. تتبع المبيعات وتفضيلات العملاء ودوران المخزون لاتخاذ قرارات مستنيرة وتحسين استراتيجية التجميع الخاصة بك.
التكامل السلس : يتكامل برنامج مكلف بسلاسة مع بوابات الدفع المختلفة و[حلول الشحن](https://mukalaf.com.sa/) وتطبيقات الطرف الثالث ، مما يضمن التشغيل السلس والفعال لمتجرك عبر الإنترنت.
لماذا تختار برنامج مكلف؟
يبرز برنامج مكلف لأنه لا يتعلق فقط ببناء متجر على الإنترنت ، ولكن حول إنشاء نظام بيئي قوي للتجارة الإلكترونية مصمم خصيصا لاحتياجات عملك. تعد القدرة على تقديم منتجات التجميع مجرد واحدة من العديد من الميزات المصممة لتحسين وظائف متجرك وربحيته. مع برنامج مكلف ، تحصل على:
- سهولة الاستخدام : لا تتطلب خبرة فنية. تم تصميم منصتنا للمستخدمين من جميع مستويات المهارة.
- التخصيص : قم بتخصيص كل جانب من جوانب متجرك ليتناسب مع هوية علامتك التجارية.
- قابلية التوسع : سواء كنت شركة صغيرة أو مؤسسة ، فإن برنامج مكلف ينمو معك.
- دعم فني : فريق الدعم المخصص لدينا جاهز دائما لمساعدتك في أي استفسارات أو تحديات.
خاتمة
يمكن أن يؤثر دمج [منتجات التجميع](https://mukalaf.com.sa/) في استراتيجية التجارة الإلكترونية الخاصة بك بشكل كبير على نمو عملك. لا يبسط برنامج بناء المتجر عملية إنشاء هذه المنتجات وإدارتها فحسب ، بل يوفر أيضا مجموعة من الميزات الأخرى لضمان ازدهار [متجرك عبر الإنترنت](https://mukalaf.com.sa/) في سوق تنافسية. احتضن قوة منتجات التجميع وارتق بعملك عبر الإنترنت إلى آفاق جديدة من خلال مميزات مكلف . | engmuhammed_alsulami_e46 | |
1,881,941 | Effortless – Free Tailwind CSS Website Template | Effortless is your go-to solution for crafting a sleek and modern landing page with minimal... | 0 | 2024-06-09T09:54:47 | https://dev.to/mikevarenek/effortless-free-tailwind-css-website-template-5ghd | webdev, tailwindcss, beginners | Effortless is your go-to solution for crafting a sleek and modern landing page with minimal effort.
**Key Features:**
- Sticky Menu: Navigate with ease as the sticky menu ensures your main navigation is always accessible, providing a smooth and user-friendly experience.
- Hero Section: Make a bold first impression with a captivating hero section, perfect for highlighting your key message or product.
- Features Section: Showcase the unique features and benefits of your product or service in a clean and organized manner, helping to convey your value proposition effectively.
- Client Testimonials Swiper Slider: Build trust with potential customers by displaying real client testimonials in an interactive swiper slider, adding a dynamic touch to your landing page.
- Subscribe Section: Grow your audience and keep them engaged with a dedicated subscribe section, encouraging visitors to join your mailing list effortlessly.
- Simple Footer: Complete your landing page with a simple yet functional footer, providing essential information and links without overwhelming your audience.
[Demo](https://spacema-dev.com/effortless)
[Download](https://github.com/spacemadev/effortless-free-tailwind-css-template)
| mikevarenek |
1,881,865 | Learning by Doing: Event Loop in Rust | Before you read, concepts like: concurrency, traits, Arc/Mutex and Rust Channles (crossbeam lib)... | 0 | 2024-06-09T09:53:56 | https://dev.to/luisccc/learning-by-doing-event-loop-in-rust-hf1 | rust, programming, tutorial, learning |
Before you read, concepts like: concurrency, traits, Arc/Mutex and Rust Channles (crossbeam lib) should be clear for you.
Image by [Huso112](https://www.deviantart.com/huso112)
# Discover rust using known concepts
As a seasoned Java software developer, I’m always on the lookout for new challenges to further my understanding of different programming languages. Recently, after completing a project involving Event Loops with Vert.x, I found myself intrigued by the idea of exploring Rust more deeply. With its rising popularity in the tech community, Rust seemed like the perfect next step in my programming journey. And so, with the experience of working with Vert.x still fresh in my mind, I thought, "Why not continue this exploration with Rust?"
## What is and why an event loop?
An event loop is a fundamental concept in programming that serves as a mechanism for managing asynchronous operations and ensuring system responsiveness. It functions by continuously checking for new events or messages within a program, processing them as needed, and then returning to check for more. This pattern is essential for handling tasks such as input/output operations, network communication, and user interactions without blocking the execution of other code.
The significance of an event loop lies in its ability to efficiently handle multiple tasks concurrently without relying on traditional synchronous methods that can lead to performance bottlenecks and unresponsive applications. By allowing the program to asynchronously process events as they occur, an event loop enables smoother and more efficient execution, making it a crucial component in modern software development, particularly in environments where responsiveness is a must.
### Some use cases for event loops
- **Graphical User Interfaces (GUIs)**: Handling user interactions like mouse clicks and key presses.
- **Networking**: Managing asynchronous I/O operations, such as incoming and outgoing network requests.
- **Game Development**: Processing game states, rendering, and handling player inputs.
- **IoT Devices**: Responding to sensor data and external commands asynchronously.
### Implementing an event loop in Rust
Here is an example implementation of an event loop in Rust:
```rust
#![allow(dead_code)]
use std::sync::{Arc, Mutex};
use std::{collections::HashMap, thread};
use crossbeam::channel::{unbounded, Receiver, Sender};
use strum_macros::{Display, EnumString};
#[derive(Clone, Debug, PartialEq, Eq, Hash, Display, EnumString)]
pub enum Event {
Dummy,
ExampleEvent,
}
pub type Payload = Vec<u8>;
pub trait Handler: Send + Sync {
fn handle(&self, event: Event, payload: Payload);
}
#[derive(Clone)]
pub struct Listener {
pub event: Event,
pub handler: Arc<dyn Handler>,
}
pub struct Dispatcher {
tx: Sender<(Event, Payload)>,
rx: Receiver<(Event, Payload)>,
registry: Arc<Mutex<HashMap<Event, Vec<Arc<dyn Handler>>>>>,
}
impl Dispatcher {
pub fn new() -> Self {
let (tx, rx) = unbounded();
Dispatcher {
tx,
rx,
registry: Arc::new(Mutex::new(HashMap::new())),
}
}
pub fn register_handler(&mut self, event: Event, handler: Arc<dyn Handler>) {
let mut registry = self.registry.lock().unwrap();
registry.entry(event).or_insert_with(Vec::new).push(handler);
}
pub fn trigger_event(&self, event: Event, payload: Payload) {
self.tx.send((event, payload)).unwrap();
}
pub fn start(&self) {
let registry = Arc::clone(&self.registry);
let rx = self.rx.clone();
thread::spawn(move || loop {
if let Ok((event, payload)) = rx.recv() {
let registry = registry.lock().unwrap();
if let Some(handlers) = registry.get(&event) {
for handler in handlers {
handler.handle(event.clone(), payload.clone());
}
}
}
});
}
}
```
### Explanation
#### Event Enum
```rust
#[derive(Clone, Debug, PartialEq, Eq, Hash, Display, EnumString)]
pub enum Event {
Dummy,
TestEvent,
}
```
`Event` is an enumeration representing the types of events that the event loop can handle. The `Display` and `EnumString` derives are used for easier handling and conversion of enum values.
#### Type Aliases
```rust
pub type Payload = Vec<u8>;
```
`Payload` is defined as a type alias for `Vec<u8>`, representing the data associated with an event.
#### Handler
```rust
pub trait Handler: Send + Sync {
fn handle_event(&self, event: Event, payload: Payload);
}
```
`Handler` is a trait that any event handler must implement. It requires a single method, `handle_event`, which takes an `Event` and `Payload`. We will elaborate more on the `Send` & `Sync` traits later.
#### Listener Struct
```rust
#[derive(Clone)]
pub struct Listener {
pub event: Event,
pub handler: Arc<dyn Handler>,
}
```
The `Listener` struct binds an `event` to a `handler` implementing the `Handler`, allowing the addition of multiple handlers for each event.
#### Dispatcher Struct
```rust
pub struct Dispatcher {
tx: Sender<(Event, Payload)>,
rx: Receiver<(Event, Payload)>,
registry: Arc<Mutex<HashMap<Event, Vec<Arc<dyn Handler>>>>>,
}
```
`Dispatcher` holds the sender and receiver for event channels and a thread-safe collection of handlers.
> ### About Send and Sync traits
> #### Trait `Send`
> Since the event loop runs in its own thread and potentially interacts with multiple handlers across different threads, handlers might need to be moved between threads. By requiring `Send`, you ensure that your handler implementations can be transferred across thread boundaries, making your event loop safe and robust in a multithreaded context.
> #### Trait `Sync`
> Handlers are stored in a shared `Arc<Mutex<HashMap<Event, Vec<Arc<dyn Handler>>>>>`. The `Arc` (atomic reference count) allows multiple threads to share ownership of the handlers without needing to clone them. By requiring `Sync`, you ensure that multiple threads can hold references to the same handler safely. This means any read access to the handler's state is thread-safe.
### Let's try it
#### Handler examples
``` rust
pub struct TestEventHandler;
impl Handler for TestEventHandler {
fn handle_event(&self, event: Event, payload: Payload) {
let data = String::from_utf8(payload).unwrap();
let message = format!("{} => {}", event, data);
info!("TestEvent: {}", message);
}
}
```
``` rust
pub struct DBTestEventHandler;
impl Handler for DBTestEventHandler {
fn handle_event(&self, event: Event, payload: Payload) {
let data = String::from_utf8(payload).unwrap();
let message = format!("{} => {}", event, data);
// Persist data into db
info!("Data saved on DB!");
}
}
```
#### Main function example
``` rust
fn main() {
env_logger::builder()
.filter_level(log::LevelFilter::Info)
.init();
let mut event_loop = Dispatcher::new();
event_loop.register_handler(Event::TestEvent, Arc::new(TestEventHandler));
event_loop.register_handler(Event::TestEvent, Arc::new(DBTestEventHandler));
// Start the event loop
event_loop.start();
loop {
info!("Give me some input, type 'exit' to quit");
let mut input = String::new();
io::stdin()
.read_line(&mut input)
.expect("Error during input");
let input = input.trim();
if input == "exit" {
break;
}
let mut split = input.split_whitespace();
let name_data = (
split.next().unwrap_or_default().to_string(),
split.next().unwrap_or_default().to_string(),
);
let event = Event::from_str(&name_data.0).unwrap_or_else(|_| Event::Dummy);
event_loop.trigger_event(event, name_data.1.as_bytes().to_vec());
}
}
```
### What's next
I have several ideas running through my head, but the ones I would like to implement are:
1. A shared, observable state between handlers. It would be very interesting to have handlers that are activated based on a certain state.
2. Taking a cue from Vert.x, the possibility of having remote handlers. To begin with, one could use the `remoc` library, which allows me to have remote `rust channels`.
Stay tuned and.. "A Presto!"
Luis
| luisccc |
1,881,942 | GitOps for CloudFront and S3 | Front-end deployments in GitOps style This strategy uses ArgoCD, EKS, and AWS services... | 0 | 2024-06-09T09:51:24 | https://dev.to/wardove/gitops-for-cloudfront-and-s3-5c7o | aws, devops, terraform, react | ## Front-end deployments in GitOps style
This strategy uses ArgoCD, EKS, and AWS services like CloudFront and S3 to streamline deployments, improve performance, and maintain best practices.
## Table of Contents <a name="Toc"></a>
1. [Introduction](#introduction)
2. [Building and Syncing to S3](#sync-s3)
3. [Deploying with Helm Chart and Kubernetes Job](#helm-deploy)
4. [Conclusion](#conclusion)
---
In the world of modern web development, deploying front-end applications efficiently and reliably is a key challenge. As teams adopt GitOps strategies to streamline and automate deployments, certain complexities arise, particularly when integrating with AWS services like CloudFront and S3.
So let’s consider that ideally all our workloads are containerized and all run on Kubernetes (EKS) platform, we have all security checks, automations, tests and pipelines in place, and already have leveraged ArgoCD and supplementary tools for deployments.
Now one common dilemma is deciding how to manage front-end deployments consistently in GitOps style while maintaining the benefits of using CloudFront for caching and performance optimization. Some teams consider moving front-end assets to containers for consistency, but this can introduce unnecessary complexity and deviate from best practices.
When employing a centralized GitOps strategy, it’s crucial to keep the deployment process consistent and manageable. However, front-end applications often require specific considerations:
- Caching and Performance: CloudFront provides a robust solution for caching and delivering static assets, ensuring high performance and low latency.
- Artifact Management: Synchronizing build artifacts to the correct S3 paths while managing different versions can be challenging.
- Deployment Automation: Automating the deployment process while ensuring the correct paths and versions are updated in CloudFront.
- Consistency and Reproducibility: Maintaining consistent and reproducible deployments across environments.
- Easy and rapid Rollbacks — if possible ofc. 😌
---
## Introduction <a name="introduction"></a>
In this article, I will share a solution I implemented to address these challenges. This approach leverages ArgoCD, EKS, AWS CloudFront, and S3, integrating them seamlessly into a GitOps workflow. By using a Kubernetes job with AWS CLI, we can manage CloudFront paths dynamically, ensuring our front-end application is always up-to-date and efficiently delivered.
1. _Release branch is merged to main_
2. _New release tag created from main_
3. _GHA is triggered on release to test and build the code_
4. _Generated artifacts are tagged and synced to s3 with respective path_
5. _Developer creates a pull request to pass the new version to GitOps repo_
6. _PR is merged and values file is updated with new version_
7. _ArgoCD picks up the changes after being triggered via Webhook or by polling_
8. _Values diff triggered a new job creation by ArgoCD_
9. _Kubernetes Job sends api call to CF to swap the origin path based on the new version_
___
## Building and Syncing to S3 <a name="sync-s3"></a>
To deploy our front-end application, we use GitHub Actions to handle the build and deployment process. The workflow triggers on new version tags, checks out the repository, sets up build environment, and configures AWS credentials. It retrieves secrets, installs dependencies, runs tests, builds the application, and syncs the output to an S3 bucket. We can of-course have multiple parallel workflows for each environment and sync to different s3 buckets with dedicated path that reflects release tag, or even sync to the same s3 bucket with dedicated path that reflects target environment + release tag ( I like the 1st option better for total segregation ).
For instance, if we’re deploying a version tagged v1.0.0 to the production environment, the path in S3 would be `s3://frontend-production-artifacts/production/v1.0.0`.
```yaml
name: Publish Release Artifact Version
run-name: "Production Release ${{ github.ref_name }} | Publishing Artifact Version | triggered by @${{ github.actor }}"
on:
push:
tags:
- 'v[0-9]+.[0-9]+.[0-9]+'
env:
ARTIFACTS_BUCKET: frontend-production-artifacts
AWS_REGION: us-east-2
ENVIRONMENT: production
jobs:
build-and-publish:
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Set up Node.js
uses: actions/setup-node@v4
with:
node-version: '20'
- name: Configure AWS credentials
uses: aws-actions/configure-aws-credentials@v4
with:
aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
aws-region: ${{ env.AWS_REGION }}
- name: Get Secrets
uses: aws-actions/aws-secretsmanager-get-secrets@v2
with:
secret-ids: frontend-secrets-${{ env.ENVIRONMENT }}
parse-json-secrets: true
- name: Install dependencies
run: yarn install
- name: Run tests
run: yarn test
- name: Build
run: yarn build
- name: Sync files to Artifacts bucket
run: aws s3 sync build/ s3://${{ env.ARTIFACTS_BUCKET }}/${{ env.ENVIRONMENT }}/${{ github.ref_name }} --delete
```
___
## Deploying with Helm Chart and Kubernetes Job <a name="helm-deploy"></a>
To automate the deployment process further, we can use a Helm chart that defines a Kubernetes job. This job handles updating the CloudFront origin path for the new version of our application using a Docker image with AWS CLI installed.
We have a values file that provides parameters like the application name, version, Docker image, S3 bucket name, and AWS region:
```yaml
global:
region: "us-east-2"
app:
name: "store-ui"
version: v1.0.10
backOffLimit: "4"
jobImage: "amazon/aws-cli:2.16.1"
originS3: "frontend-production-artifacts"
```
The Kubernetes job uses these values to dynamically set its configuration. It includes the job name, the container image, and environment variables for the S3 bucket, origin path, and AWS region.
When the job runs, it installs `jq` for JSON processing, retrieves the CloudFront distribution ID based on the S3 bucket name, fetches the current CloudFront configuration, updates the origin path to the new version, and invalidates the CloudFront cache to ensure the latest version is served to users. Of course you can always build your own lightweight docker image with all dependencies already installed (aws-cli and jq), or even build your own solution by leveraging AWS SDK directly.
```yaml
apiVersion: batch/v1
kind: Job
metadata:
name: swap-cf-origin-path-{{ .Values.app.name }}-{{ .Values.app.version }}
spec:
template:
spec:
serviceAccountName: {{ .Values.app.name }}
containers:
- name: aws-cli
image: {{ .Values.app.jobImage }}
env:
- name: S3_BUCKET_NAME
value: {{ .Values.app.originS3 }}
- name: ORIGIN_PATH
value: /{{ .Release.Namespace }}/{{ .Values.app.version }}
- name: AWS_REGION
value: {{ .Values.global.region }}
command: ["/bin/sh","-c"]
args:
- |
set -e
yum install jq -y
CF_DIST_ID=$(aws cloudfront list-distributions --query "DistributionList.Items[?contains(Origins.Items[].DomainName, '${S3_BUCKET_NAME}.s3.${AWS_REGION}.amazonaws.com')].Id | [0]" --output text)
OUTPUT=$(aws cloudfront get-distribution-config --id $CF_DIST_ID)
ETAG=$(echo "$OUTPUT" | jq -r '.ETag')
DIST_CONFIG=$(echo "$OUTPUT" | jq '.DistributionConfig')
UPDATED_CONFIG=$(echo "$DIST_CONFIG" | jq --arg path "${ORIGIN_PATH}" '.Origins.Items[0].OriginPath = $path')
aws cloudfront update-distribution --id $CF_DIST_ID --if-match $ETAG --distribution-config "$UPDATED_CONFIG"
aws cloudfront create-invalidation --distribution-id $CF_DIST_ID --paths "/*"
restartPolicy: Never
backoffLimit: {{ .Values.app.backOffLimit }}
```
To allow our Kubernetes job to interact with AWS services like CloudFront and S3, we need to grant it the necessary permissions to the job’s service account. We can achieve this by using IAM Roles for Service Accounts (IRSA) or Pod identities. Here’s how you can configure IRSA option using Terraform. This setup allows the Kubernetes job to securely perform actions required for updating the CloudFront origin path and invalidating the cache.
```hcl
data "aws_iam_policy_document" "service_account_assume_role" {
statement {
actions = ["sts:AssumeRoleWithWebIdentity"]
effect = "Allow"
condition {
test = "StringEquals"
variable = "${replace(aws_iam_openid_connect_provider.oidc_provider_sts.url, "https://", "")}:aud"
values = ["sts.amazonaws.com"]
}
condition {
test = "StringEquals"
variable = "${replace(aws_iam_openid_connect_provider.oidc_provider_sts.url, "https://", "")}:sub"
values = ["system:serviceaccount:${var.namespace}:store-ui"]
}
principals {
identifiers = [aws_iam_openid_connect_provider.oidc_provider_sts.arn]
type = "Federated"
}
}
}
resource "aws_iam_role" "service_account_role" {
assume_role_policy = data.aws_iam_policy_document.service_account_assume_role.json
name = "store-ui-sa-role-${var.namespace}"
tags = local.default_tags
lifecycle {
create_before_destroy = false
}
}
resource "aws_iam_policy" "store_ui_swap_origin_policy" {
name = "store-ui-policy-${var.namespace}"
path = "/"
description = "IAM policy for store-ui job service account"
policy = jsonencode({
Version = "2012-10-17"
Statement = [
{
Action = [
"cloudfront:GetDistribution",
"cloudfront:UpdateDistribution",
"cloudfront:CreateInvalidation",
"s3:ListBucket",
"s3:GetObject"
]
Effect = "Allow"
Resource = "*"
}
]
})
}
# Attach policies to the service account role
resource "aws_iam_role_policy_attachment" "service_account_role" {
depends_on = [
aws_iam_role.service_account_role,
aws_iam_policy.store_ui_policy
]
role = aws_iam_role.service_account_role.name
policy_arn = aws_iam_policy.store_ui_swap_origin_policy.arn
}
```
___
## Conclusion <a name="conclusion"></a>
At this point, all we need to do is push the new version after building and syncing it to S3. The job will handle updating the CloudFront origin path and invalidating the cache, ensuring that users always get the latest version of our front-end application. For an even more cosmetically satisfying approach, we could implement an additional Continuous Deployment (CD) solution on top of ArgoCD, such as OctopusDeploy. However, that is a topic for another day and another discussion 😉 Farewell Folks! 😊
| wardove |
1,881,939 | 6 Cutting-Edge AI Tools that will transform Your Workflow | In the fast-paced world of technology, staying ahead means embracing innovation that can streamline... | 0 | 2024-06-09T09:49:53 | https://dev.to/hr21don/6-cutting-edge-ai-tools-that-will-transform-your-workflow-1am0 | ai, productivity, career, webdev | In the fast-paced world of technology, staying ahead means embracing innovation that can streamline your workflow and boost productivity.
And here is the curated list:
## 1. [AIHumanizer.ai](https://aihumanizer.ai/)
AIHumanizer is an AI tool that transforms your AI text into human content instantly.
## 2. [PopAI](https://www.popai.pro/)
PopAI is a game-changer for productivity. This AI tool serves as your personal AI workspace for boosting productivity.
-> Chat with document.
-> AI Presentations
-> Chat w/image
-> AI Chat
## 3. [Text Blaze](https://blaze.today/)
Text-Blaze is an AI tool for anyone looking to eliminate repetitive typing tasks. By using text-shortcuts, text-blaze can save users over 28 hours a month, which translates to more than $10,000 a year in savings through productivity improvements.
## 4. [TypeDream ](https://typedream.com/)
TypeDream is a innovative AI tool that simplifies the process of building websites. With a single prompt you can get complete content structure and style done for you, ready to edit and publish instantly.
## 5. [CircleBack](https://circleback.ai/)
CircleBack is an AI-powered tool designed to automate the process, from transcriptions to actions. By automatically updates your CRM, Notion, Teams, Slack and more.This automation saves time and allows you to focus on more strategic tasks.
## 6. [Simplified](https://simplified.com/download)
Simplified is an AI tool used to create compelling and effective copy in minutes. This will will generate marketing copy: emails, social media posts and more.
## Recap
If you've read this far, first of all, thank you! Please let me know if I have missed any or if you believe that you have your own AI websites that should be listed here. | hr21don |
1,881,940 | hello,programers,i really wanna know which language is good for seeking a job. | question as title,i am a freshman with a little c++ knowledge,which programming language do you... | 0 | 2024-06-09T09:45:17 | https://dev.to/hallowaw/helloprogramersi-really-wanna-know-which-language-is-good-for-seeking-a-job-1fk2 | discuss | question as title,i am a freshman with a little c++ knowledge,which programming language do you recommend for a fresh man to find a job.
i have a little interest for c++ and javascript cause i think they are concise and easy to understand,what is your opinion, thank you again. | hallowaw |
1,881,938 | Famous Garment Brands: Icons of Fashion and Quality | Explore the world of famous garment brands, renowned for their iconic designs and exceptional... | 0 | 2024-06-09T09:30:58 | https://dev.to/hazrat_sultan_f11769/famous-garment-brands-icons-of-fashion-and-quality-nnn | Explore the world of [famous garment brands](https://www.revisebook.com/articles/famous-garment-brands/), renowned for their iconic designs and exceptional quality. From the luxurious sophistication of Gucci and Chanel to the innovative sportswear of Nike and Adidas, these brands set global fashion trends. Discover the timeless appeal of Levi's denim, the classic American style of Ralph Lauren, and the cutting-edge streetwear of Supreme and Off-White. Each brand tells a unique story of craftsmanship and creativity, shaping the way we dress and express ourselves. Dive into how these famous garment brands continue to influence fashion and culture. | hazrat_sultan_f11769 | |
1,881,563 | TEST | testing going on here | 0 | 2024-06-08T20:14:38 | https://dev.to/bug_hunter_bafbe6b69fd53a/test-4f0o | testing going on here
| bug_hunter_bafbe6b69fd53a | |
1,881,918 | Navigating the Testing Challenges in Machine Learning Systems | Hey there! Let's dive into the world of Testing Machine Learning (ML) Systems. It's a bit different... | 0 | 2024-06-09T09:22:08 | https://dev.to/pravinkumar/navigating-the-testing-challenges-in-machine-learning-systems-1o5c | testing, ai, machinelearning, challenge | Hey there! Let's dive into the world of _**Testing Machine Learning (ML) Systems**_. It's a bit different from what you might be used to with regular software testing. With ML, we're dealing with complex algorithms that use data to make decisions, making it tricky to figure out what's right and wrong.
> Imagine trying to understand how an ML model makes decisions—it's like trying to solve a maze. Knowing how these decisions are made is super important for testing, but it's not easy.
Then there's the problem of finding realistic test scenarios. ML models can handle tons of different inputs, and finding the right ones to really put the system to the test is like finding a needle in a haystack.
And let's not forget about creating reliable test benchmarks. In regular software, we know exactly what the output should be. But with ML, it's all about probabilities and uncertainties, so it's hard to say what's right or wrong.
Oh, and running tests on ML systems can be really expensive. Especially for big, complex models, it takes a lot of computing power. We need to find ways to keep costs down without skimping on testing.
And speaking of challenges, one big one is the lack of clear benchmarks to measure ML systems against. Normally, we have standards to compare our software to, but with ML, it's like trying to hit a moving target. Then there's the issue of dealing with the huge range of possible inputs. ML systems work with all kinds of data, and trying to cover everything can feel impossible. It's like testing a car not just in a vacuum but on real roads with real traffic.
And let's not forget about hyper-parameters. These settings can make or break an ML model's performance, so having a systematic methodology for tweaking them is crucial. Plus, having common frameworks and benchmarks can help standardize testing practices across the board. Oh, and there's this cool concept called metamorphic relationships. It's about finding how inputs relate to outputs in ways that remain consistent even if the model changes. Pretty neat, right?
Some potential directions for future research in the domain of testing machine learning based systems include:
1. _**Automated Generation of Metamorphic Relationships**_: Further exploration and development of techniques using machine learning to automate the creation of metamorphic relationships for testing ML-based systems.
2. _**Enhanced Adversarial Testing**_: Continued research on generating adversarial examples for non-image data, such as text and audio, to improve the effectiveness of detecting errors in real scenarios for ML-based system testing.
3. _**Efficient Sampling of Input Data**_: Further investigation into techniques for efficiently sampling input data with combinatorial interaction coverage to address the challenges of large input spaces in ML-based systems.
4. _**Adaptation of Traditional Testing Techniques**_: Research efforts focused on adapting traditional testing techniques with machine learning support to enhance the cost-effectiveness and scalability of testing ML-based systems.
By exploring these research directions, the field of testing machine learning based systems can advance towards more effective and efficient testing practices, ensuring the quality and reliability of software systems supported by machine learning.
So yeah, testing ML systems might be a bit of a challenge, but by understanding the ins and outs of ML algorithms and harnessing advanced testing techniques, we can build systems that are not just reliable and robust but also perform like champs in real-world scenarios. It's a journey of discovery and improvement, and with everyone pitching in—from researchers to practitioners to industry players—we're bound to keep pushing the boundaries of what's possible.
> REFERENCES:
> - https://link.springer.com/article/10.1007/s10664-020-09881-0
> - https://ieeexplore.ieee.org/abstract/document/8718214
| pravinkumar |
1,881,922 | SOLID Principles for Android | As a developer, there comes a time when we have to learn principles for moving ahead in career. For... | 27,686 | 2024-06-09T09:19:25 | https://dev.to/rishi2062/solid-principles-for-android-4f62 | android, androiddev, opensource, solidprinciples | 
As a developer, there comes a time when we have to learn principles for moving ahead in career. For some this topic might be new, for some they are already experienced on these principles. I will try to make sure, this article may come in help for both of them.
So Let's Begin,
> Every letter in SOLID , represents one principle.
The Fist Principle that we will talk about
> S - Single Responsibility Principle ( SRP )
This one is easy to understand, but it might take you some time to get in memory muscle.
Real world Example - Let's say you are a chef in a restaurant, now you should be responsible for making the food right.
Now if you given also the task of handling the staffs in kitchen or serving food, will make the work complicated right.
That's how in programming, a method that you have declared should be assigned with only one responsibility and that is the only reason it should change. In this manner it will make code more convincible, workable and readable.
For ex :
```
class Chef{
fun cook(){
println("Cooking")
}
fun orderIngredients(){
println("Ordering Ingredients")
}
fun manageStaff(){
println("Managing Staff")
}
}
fun main(){
val chef = Chef()
chef.cook()
chef.orderIngredients()
chef.manageStaff()
}
// but
// chef should only cook
class Chef1{
fun cook(){
println("Cooking")
}
}
class Manager{
fun orderIngredients(){
println("Ordering Ingredients")
}
fun manageStaff(){
println("Managing Staff")
}
}
```
let's take an example of common usecase, when we are handling the authentication for our app,
```
class LoginMethod(
private val firebaseAuth: FirebaseAuth
) {
fun signIn(email: String, password: String) {
// Input validation
if (email.isEmpty() || password.isEmpty()) {
throw IllegalArgumentException("Invalid input")
}
// Authentication
try {
firebaseAuth.signInWithEmailAndPassword(email, password)
println("Login successful")
} catch (e: Exception) {
// Error handling
println("Login failed: ${e.message}")
}
}
}
```
Here we are making this signIn function to handle more responsibility than it should do, like validating the fields and handling errors also
Here's how you can fix it,
```
class LoginMethod(
private val firebaseAuth: FirebaseAuth,
private val fieldValidator: FieldValidator,
private val errorHandler: ErrorHandler
) {
fun signIn(email: String, password: String) {
// Input validation
if(!fieldValidator.validateEmail(email) || !fieldValidator.validatePassword(password)) {
throw IllegalArgumentException("Invalid Format")
}
// Authentication
try {
firebaseAuth.signInWithEmailAndPassword(email, password)
println("Login successful")
} catch (e: Exception) {
// Error handling
errorHandler.handleError(e)
}
}
}
class FieldValidator {
fun validateEmail(email: String): Boolean {
return email.contains("@")
}
fun validatePassword(password: String): Boolean {
return password.length >= 6
}
}
class ErrorHandler {
fun handleError(e: Exception) {
println("An error occurred: ${e.message}")
}
}
```
Here our signIn function can only be responsible for login , not for checking validation or logging error.
> Open/ Closed Principle ( OCP )
Here this principle states that, a class should open for extension but closed for modification.
Let's take an example
Real world example , say there is a car and it has music system which can play music via usb.
Now say, music system nowadays are coming with bluetooth connectivity also, then the engineers will not open each part of this music system, and install bluetooth module and close it, right. For one time it should feel convenient but for large case definitely not.
Instead they can extend one common module, where any new modules like BLE, WiFi can be connected, in this way they don't have to modify the system every time.
Let's understand with programming,
```
open class Shape {
open fun draw() {
println("Drawing Shape")
}
}
```
Here if we want to change this class for every different shape, then it might change the code for the whole app, wherever you are using this.
Here intention is we should not modify how the class behaves or works.
so in this case , the class Shape should not be modified to accomodate new types of shapes
```
open class Shape {
open fun draw() {
println("Drawing Shape")
}
open fun drawSquare() {
println("Drawing Shape")
}
open fun drawRect() {
println("Drawing Shape")
}
}
```
Instead you can modify this as
```
open class Shape {
open fun draw() {
println("Drawing Shape")
}
}
class Square : Shape() {
override fun draw() {
println("Drawing Square")
}
}
class Circle : Shape() {
override fun draw() {
println("Drawing Circle")
}
}
```
Will post other principles very soon, till then if you have any suggestion, i'm open to any discussion. | rishi2062 |
1,881,921 | Use CSS to Remove PNG Image Background Color | In CSS you can remove the white background color form your PNG image by using only one CSS property... | 0 | 2024-06-09T09:18:36 | https://dev.to/yasminsardar/use-css-to-remove-png-image-background-color-460h | beginners, tutorial, css, devops | In CSS you can remove the white background color form your PNG image by using only one CSS property called mix-blend-mode. Below example:
```js
img { mix-blend-mode: multiply;}
```
If you want to remove white or background color from an image, this CSS property is perfect for you. Additionally, it works on all image types, not just PNG.
And if you also want to see some more properties of mix-blend-mode you can check it out on w3 school, there are a lot more properties that I haven't mentioned here.
Like you I also want to remove white background from my image, I use many CSS properties like background-color: transparent; else background-image: url('path/to/image.jpg'); and many more,
But nothing was working, so I searched on YouTube and found this method. It worked, so follow all the steps outlined below.
###Step 1: Select image in CSS###
The first step is to select the image in the CSS file, if your image is in a container then you select the main container of your image.
```js
.container {}
```
In the above example there is only container class inside the style sheet as you can see.
###Step 2: Add this CSS property to image###
After adding image in the CSS sheet now only add this CSS mix-blend-mode: multiply;
Here is an example:
```js
.container {
mix-blend-mode: multiply;
}
```
Once you add it is done, now your PNG has no background color.
###Step 3: Save the file, and check preview###
Once you follow both the above steps now save the HTML and CSS files and preview it on your browser below, I have shared the before and after picture which you can see
Before Image:
After Image:
I hope this post helps you to remove white background color form your PNG image using CSS codes.
You may also wants to know: https://newbiecoding.com/how-to-change-font-in-html-without-css-2/
| yasminsardar |
1,881,920 | Behind the Scenes of Rosewood: Meet the Stellar Cast | Take a peek behind the curtains of "Rosewood tv show" and get acquainted with its talented cast. With... | 0 | 2024-06-09T09:17:56 | https://dev.to/jhon_snow_bee41c17043d868/behind-the-scenes-of-rosewood-meet-the-stellar-cast-1nah | Take a peek behind the curtains of "[Rosewood tv show](https://www.hbtrl.com/articles/rosewood-tv-show-cast/)" and get acquainted with its talented cast. With Morris Chestnut and Jaina Lee Ortiz at the forefront, this ensemble delivers an electrifying mix of drama and suspense. Each actor breathes life into their character, adding depth and authenticity to the storyline. From the dynamic interactions between the leads to the nuanced performances of the supporting cast, every member contributes to the show's allure. Join us as we unravel the magic woven by the remarkable individuals who bring "Rosewood" to life on screen. | jhon_snow_bee41c17043d868 | |
1,881,919 | Quick Steps to Recover Your Stolen Bitcoin or Cryptocurrency | I feel what makes most of us vulnerable to this types of attack is ignorance generally in the crypto... | 0 | 2024-06-09T09:17:02 | https://dev.to/dani_walsh_57e8c2ddf87df2/quick-steps-to-recover-your-stolen-bitcoin-or-cryptocurrency-19b3 | bitcoin, cryptocurrency, university | I feel what makes most of us vulnerable to this types of attack is ignorance generally in the crypto space. In January 2023, I lost about 300k USD in form of Bitcoin to scammers! All i did wrong was to click a link (a phishing website) and in less than 10 minutes, all my fortune went down the drain. Some important lessons i've learnt thus far are
**Use cold wallets (they work offline and are more easier to manage)
**Change your passwords regularly
**Never click any link you are not familiar with
**Always get informed! Don't be ignorant.
Cryptocurrency has become more popular and leaves us with an increasing number of people with bad intentions trying to take advantage of new technologies. By following a strict security protocol, you’ll be able to secure your cryptocurrency assets, protect them from fraudsters, and be safe from any potential losses. In case you've lost some sum like i did, you can contact TECHGENIUSRECOVERY at USA dot COM via Email! They are the best recovery platform i've worked with thus far. They were able to recover about 90% of all I lost and the good thing about them is that they will let you know if they can handle your case or not. So they will not just take your money when they already know they won't help you out. | dani_walsh_57e8c2ddf87df2 |
1,881,916 | Understanding the JavaScript Event Loop 🚀 | Event Loop is another important concept in JavaScript that often comes up in technical... | 0 | 2024-06-09T09:12:41 | https://dev.to/shahabmalikk/understanding-the-javascript-event-loop-44ij | webdev, javascript, frontend, softwareengineering | Event Loop is another important concept in JavaScript that often comes up in technical interviews
JavaScript is single-threaded, meaning it can only perform one task at a time. This might make you wonder how JavaScript handles asynchronous operations like fetching data from an API, setTimeout, or event listeners. The magic lies in the Event Loop!
Let's delve a bit deeper into the components and behavior of the event loop
## How the Event Loop Works
- Call Stack :
The call stack is where JavaScript keeps track of function execution. When a function is called, it gets pushed onto the stack. When the function completes, it is popped off the stack.
- Web APIs :
Certain operations, like asynchronous network requests (XHR, fetch), timers (setTimeout, setInterval), and DOM events, are handled by the browser's Web APIs. When such an operation completes, the Web API pushes a callback function to the task queue.
- Task Queue (Callback Queue) :
The task queue holds the callback functions that are ready to be executed. This includes callbacks from Web APIs and promises that have been resolved.
- Event Loop :
The event loop constantly monitors the call stack and the task queue. If the call stack is empty, the event loop pushes the first task from the task queue onto the call stack, allowing it to be executed. This process ensures that tasks are executed in a non-blocking manner, allowing the JavaScript engine to perform other operations while waiting for asynchronous operations to complete.
## Example of Event Loop
Let's understand Event Loop with help of an Example.
```
console.log('Start');
setTimeout(() => {
console.log('Timeout callback');
}, 0);
Promise.resolve().then(() => {
console.log('Promise callback');
});
console.log('End');
```
### Execution Steps:
- Call Stack :
1. console.log('Start') is called and logs "Start".
2. setTimeout is called, which sets up a timer in the Web API and registers a callback to be executed after 0 milliseconds.
3. Promise.resolve().then is called, which registers a callback to be executed when the promise resolves.
4. console.log('End') is called and logs "End".
- Web API :
The timer for setTimeout completes almost immediately (after 0 milliseconds) and its callback is pushed to the task queue.
- Microtask Queue :
The "then" callback from the promise is pushed to the microtask queue.
- Event Loop:
1. The call stack is empty after executing the synchronous code.
2. The event loop first processes the microtask queue before the task queue. Therefore, the promise callback is executed and logs "Promise callback".
3. Then, the event loop processes the task queue. The setTimeout callback is executed and logs "Timeout callback".
## Output
```
Start
End
Promise callback
Timeout callback
```
## Key Points
- Microtask Queue: This queue includes tasks such as resolved promise callbacks and process.nextTick in Node.js. It has higher priority than the task queue.
- Task Queue: This queue includes tasks such as setTimeout, setInterval, and other callback functions. It is processed after the microtask queue.
## Conclusion
The event loop enables JavaScript to handle asynchronous operations in a non-blocking manner, ensuring smooth execution of code without interruptions. Understanding the event loop is crucial for writing efficient and effective JavaScript code, especially when dealing with asynchronous operations.
So, next time you're working with JavaScript, remember the Event Loop and its role in asynchronous operations!
Want to learn about Web Development, Follow [Shahab Malik](https://www.linkedin.com/in/shahab-malik/) 😀 | shahabmalikk |
1,881,913 | Enriching Event Listings with Microformats/Microdata for a Better User Experience | TLDR: Use microdata/microformats to add more meaning to event listings on your website, enabling... | 0 | 2024-06-09T09:07:59 | https://dev.to/netsi1964/enriching-event-listings-with-microformatsmicrodata-for-a-better-user-experience-5bgl | microdata, eventlistings, ux, webdev | > TLDR: Use microdata/microformats to add more meaning to event listings on your website, enabling users to easily add events to their calendars and providing a better user experience.
Many websites have lists of events which they in the best intention want their users to know about. But maybe they could get feedback from users like this:
> Hey, love the event listings! But adding them to my calendar is a pain. Can you please add a 'Add to Calendar' feature? It'd make my life so much easier!
Cause text links are nice for the brain, but not good for the user to easily add to her calendar. Microformats/Microdata + some javascript can change that!
## The overlooked HTML feature: Microformats/Microdata
The microformats/microdata used in this example is based on the `h-event` vocabulary, which is a standardized way of marking up events on the web.
Microformats/microdata is a way to add additional semantic meaning to HTML elements, making it easier for search engines and other machines to understand the structure and content of a webpage.
The `h-event` vocabulary is part of the [Microformats 2 specification](https://microformats.org/wiki/microformats2), which is a standardized way of marking up common data structures on the web.
Here is an example of the microformats used in this example:
```html
<li class="h-event">
<time class="dt-start" datetime="2024-11-05T12:00:00">11/5</time>
<span class="p-name">Tennis Band på Nytorv</span>
<time class="dt-start" datetime="2024-11-05T12:00:00">kl. 12.00</time> -
<time class="dt-end" datetime="2024-11-05T13:00:00">13.00</time>
</li>
```
In this example, the `h-event` class is used to indicate that the element represents an event. The `dt-start` and `dt-end` classes are used to indicate the start and end dates and times of the event, respectively. The `p-name` class is used to indicate the name of the event.
You can find more information about the `h-event` vocabulary and Microformats 2 in general on the official Microformats website:
* [Microformats 2 specification](https://microformats.org/wiki/microformats-2)
* [h-event vocabulary](https://microformats.org/wiki/h-event)
Additionally, you can find more information about microdata on the W3C website:
* [W3C Microdata specification](https://www.w3.org/TR/microdata/)
## Using javascript to dynamically add link "Add to Calendar"
Adding an 'Add to Calendar' feature to your event listings is easier than you think!
With a bit of JavaScript magic, you can add a link to your microdata-extended HTML that allows users to easily add events to their calendars.
Together with [GROK](https://groq.com/) i've generated a script to demonstrate this, and you can see it in action on [CodePen](https://codepen.io/netsi1964/pen/KKLvoGz?editors=1010). With just a few lines of code, you can give your users a seamless way to add events to their calendars, making your event listings even more user-friendly. So why not give it a try and take your event listings to the next level? | netsi1964 |
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Contact Us / 24 Hours Reply
Telegram:dmhelpshop
WhatsApp: +1 (980) 277-2786
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Email:dmhelpshop@gmail.com | hafazakiyaha79 | |
1,881,911 | Movie Finder | This is a program that I made as a portfolio project during my studies on computer science at... | 0 | 2024-06-09T09:06:26 | https://dev.to/andychild1/movie-finder-1jn9 | python, movies, algorithms | This is a program that I made as a portfolio project during my studies on computer science at Codecademy.
It is a recommendation software that help the user to find movies based on the related category.
I've chosen Nodes and Linked List as the main data structure where the Movie class act as a common Node class and the Linked Lists will hold all the Movie classes related by their respective category.
I've chosen the binary search algorithm even though a common linear search would have been enough for this short category list...I just did it to make things more challenging.
All the results are sorted by title using a quicksort algorithm wich sorts all the results in place avoiding the need for additional memory usage.
If you have any questions or advice please ask!
Enjoy the project!
[This is the link to all the source code](https://github.com/andychild1/movie_search.git) | andychild1 |
1,881,910 | Seeking Spiritual Connections: Embrace Guidance from Local Mediums | Explore the profound world of spiritual mediums near you to uncover guidance and solace. Whether... | 0 | 2024-06-09T09:00:19 | https://dev.to/rick_henry_d0eb318d5211b6/seeking-spiritual-connections-embrace-guidance-from-local-mediums-1m1j | Explore the profound world of [spiritual mediums near you](https://www.haqbahu.com/articles/spritual-miediums-near-me/) to uncover guidance and solace. Whether you're navigating life's challenges or seeking communication with departed loved ones, these gifted individuals serve as conduits between realms. Through their unique abilities, they offer insights and messages from the spiritual realm, providing clarity and comfort. By engaging with spiritual mediums in your area, you can deepen your spiritual journey and discover profound truths about yourself and the universe. Connect with nearby spiritual mediums today to embark on a transformative path of enlightenment and understanding. | rick_henry_d0eb318d5211b6 | |
1,881,909 | Running a python script as a standalone task in ECS | Architecture Prepare docker Image Dockerfile - A Dockerfile is a text file... | 0 | 2024-06-09T08:58:56 | https://dev.to/harsh_vardhansingh_69340/running-a-python-script-as-a-standalone-task-in-ecs-317l | ecs, docker, aws | ## Architecture
## Prepare docker Image
- Dockerfile - A Dockerfile is a text file that contains a series of instructions and commands used to build a Docker image. It specifies the operating system, application code, dependencies, environment variables, and other necessary configurations to create a Docker image.
- Docker Image - A Docker image is a lightweight, standalone, executable package that includes everything needed to run a piece of software, including the code, runtime, libraries, environment variables, and configurations. It serves as a template for creating Docker containers. An image is built from a Dockerfile.
- Docker Container - A Docker container is a runtime instance of a Docker image. It is a lightweight, standalone, and executable unit that runs the software defined in the Docker image. Containers are used to run applications in isolation from the host system and other containers.
### Create a python script
Create file `demp.py` in a new directory `LightningTalk` and add code in it.
### Create a docker file
Create a file docker file in same directory
```console
touch Dockerfile
```
Add following code in Dockerfile
```
FROM public.ecr.aws/docker/library/python:3
WORKDIR /home/harsh/workplace/LightningTalk
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
CMD [ "python", "./demo.py" ]
```
We are using python base image from ECR Public Gallery https://gallery.ecr.aws/docker/library/python/?page=1
### Build Docker Image
```console
docker build --platform linux/amd64 -t lightning-talk-image:test .
```
### Run container for testing
```console
docker run -it --rm --name lightning-talk-task lightning-talk-image:test
```
## Create ECR Registry and push image to ECR
Run the get-login-password command to authenticate the Docker CLI to your Amazon ECR registry.
```console
aws ecr get-login-password --region us-east-1 | docker login --username AWS --password-stdin $AWSACCOUNTID.dkr.ecr.us-east-1.amazonaws.com
```
After you have authenticated to an Amazon ECR registry with this command, you can use the client to push and pull images from that registry
Create a repository in Amazon ECR using the create-repository command.
```console
aws ecr create-repository --repository-name python-images --region us-east-1 --image-scanning-configuration scanOnPush=true --image-tag-mutability MUTABLE
```
Run the docker tag command to tag your local image into your Amazon ECR repository as the latest version. Copy the repositoryUri from the output in the previous step.
```console
docker tag lightning-talk-image:test $AWSACCOUNTID.dkr.ecr.us-east-1.amazonaws.com/python-images:latest
```
Run the docker push command to deploy your local image to the Amazon ECR repository. Make sure to include :latest at the end of the repository URI.
```console
docker push $AWSACCOUNTID.dkr.ecr.us-east-1.amazonaws.com/python-images:latest
```
## Create ECS Resources and run the task
### Create a new cluster
```console
aws ecs create-cluster --cluster-name lightning-talk-cluster
```
### Register a Task Definition
Before you can run a task on your ECS cluster, you must register a task definition. Task definitions are lists of containers grouped together.
```console
aws ecs register-task-definition --cli-input-json file://./fargate-task.json
```
Before running above command we need to save the task definition JSON as a file `fargate-task.json`.
```
{
"family": "python-tasks",
"containerDefinitions": [
{
"name": "lightning-talk",
"image": "$AWSACCOUNTID.dkr.ecr.us-east-1.amazonaws.com/python-images:latest",
"cpu": 256,
"memory": 2048,
"portMappings": [
{
"containerPort": 80,
"hostPort": 80,
"protocol": "tcp"
}
],
"essential": true,
"environment": [],
"environmentFiles": [],
"mountPoints": [],
"volumesFrom": [],
"ulimits": [],
"logConfiguration": {
"logDriver": "awslogs",
"options": {
"awslogs-group": "/ecs/python-tasks",
"awslogs-create-group": "true",
"awslogs-region": "us-east-1",
"awslogs-stream-prefix": "ecs"
},
"secretOptions": []
},
"systemControls": []
}
],
"executionRoleArn": "arn:aws:iam::$AWSACCOUNTID:role/ecsTaskExecutionRole",
"networkMode": "awsvpc",
"requiresCompatibilities": [
"FARGATE"
],
"cpu": "256",
"memory": "2048"
}
```
### Running a task
Run following task
```console
aws ecs run-task --cluster lightning-talk-cluster --task-definition python-tasks --launch-type FARGATE --network-configuration 'awsvpcConfiguration={subnets=["subnet-xxxxx","subnet-xxxxx"],securityGroups=["sg-xxxxxx"],assignPublicIp="ENABLED"}'
```
To get the values of subnet and subnet we can use values from default VPC and default security group. | harsh_vardhansingh_69340 |
1,881,908 | Revolutionizing Web Development: Harnessing the Power of React.js for Modern Web Applications | In the heart of India’s tech industry, a web development company in Bangalore is revolutionizing the... | 0 | 2024-06-09T08:57:44 | https://dev.to/ranjit_reddy_cdb410e64ad8/revolutionizing-web-development-harnessing-the-power-of-reactjs-for-modern-web-applications-2535 | In the heart of India’s tech industry, a web development company in Bangalore is revolutionizing the digital landscape. Leveraging the capabilities of React.js, these companies are crafting modern web applications that are not only visually appealing but also highly functional and scalable. This article explores how React.js is transforming web development and why it has become a preferred choice for leading web development firms in Bangalore.
**The Rise of React.js**
React.js, developed by Facebook, is an open-source JavaScript library designed for building user interfaces, particularly for single-page applications where a fast and interactive user experience is crucial. Its component-based architecture, virtual DOM, and unidirectional data flow make it an ideal tool for creating complex and dynamic web applications.
**Key Features of React.js**
Component-Based Architecture: React.js allows developers to build encapsulated components that manage their own state, then compose them to create complex UIs. This modular approach promotes reusability and maintainability.
**Virtual DOM:** React.js introduces the concept of a virtual DOM, which is a lightweight copy of the actual DOM. When changes are made, React.js updates the virtual DOM first and then efficiently reconciles these changes with the real DOM, resulting in faster performance.
**Unidirectional Data Flow:** React.js ensures a unidirectional data flow, making it easier to debug and understand the state management of applications.
**Why React.js is the Preferred Choice for Web Development Companies in Bangalore**
A web development company in Bangalore opts for React.js for various reasons:
High Performance and Efficiency
React.js's virtual DOM enhances the performance of web applications by minimizing direct manipulations of the actual DOM. This leads to faster rendering times and a smoother user experience, crucial for modern web applications.
**Enhanced User Experience**
With React.js, developers can create highly interactive and responsive user interfaces. The component-based structure allows for the development of rich user interfaces, providing users with a seamless and engaging experience.
**SEO-Friendly**
React.js supports server-side rendering, which is essential for improving the SEO performance of web applications. This means web pages can be indexed more effectively by search engines, driving more organic traffic to the site.
**Strong Community and Ecosystem**
React.js boasts a robust and active community, continuously contributing to its growth and improvement. The extensive ecosystem of libraries and tools available for React.js further simplifies the development process and enhances the functionality of web applications.
**Case Studies: Success Stories in Bangalore**
**E-Commerce Solutions**
A prominent web development company in Bangalore used React.js to build a scalable and dynamic e-commerce platform. The platform featured real-time product updates, seamless navigation, and an intuitive user interface. This resulted in a significant increase in user engagement and conversion rates.
**Financial Applications**
For a financial services client, another leading web development company in Bangalore developed a comprehensive dashboard using React.js. The dashboard provided real-time data visualization and analytics, enabling the client to make informed decisions quickly and efficiently.
**Healthcare Platforms**
In the healthcare sector, a web development company utilized React.js to create a patient management system. This system streamlined patient records, appointments, and communication between doctors and patients, significantly improving operational efficiency and patient care.
**The Future of Web Development with React.js**
The future of web development looks promising with React.js continuing to evolve. As web development companies in Bangalore stay ahead of the curve, they are exploring integrations with other technologies such as Next.js for server-side rendering and GraphQL for efficient data management.
**Embracing Innovation**
To remain competitive, web development companies in Bangalore are constantly innovating and adapting to new trends. React.js, with its continuous updates and community-driven advancements, remains at the forefront of this innovation.
**Expanding Capabilities**
By integrating React.js with emerging technologies, web development companies are expanding the capabilities of web applications, making them more powerful, scalable, and user-friendly.
**Conclusion**
A [web development company in Bangalore](https://www.obiikriationz.com/web-development-company-bangalore) is not just keeping pace with the rapid advancements in technology but is also setting new benchmarks by harnessing the power of React.js. This JavaScript library has become instrumental in creating modern web applications that meet the ever-evolving needs of businesses and users alike. As these companies continue to innovate and push the boundaries of web development, React.js will undoubtedly remain a cornerstone of their success, driving the future of digital experiences. | ranjit_reddy_cdb410e64ad8 | |
1,881,907 | Auto suggest vscode plugins for your team through the settings in your repo. | A less known feature is the ability to suggest what plugins should be installed to best work with... | 27,650 | 2024-06-09T08:57:29 | https://dev.to/matthewbill/auto-suggest-vscode-plugins-for-your-team-through-the-settings-in-your-repo-1l6m | vscode, webdev, plugins, developer | A less known feature is the ability to suggest what plugins should be installed to best work with your repo, by by using the `extensions.json` file in the `/.vscode` folder.
```
{
"recommendations": [
"dbaeumer.vscode-eslint",
"esbenp.prettier-vscode",
"mikestead.dotenv",
"hediet.vscode-drawio",
"github.vscode-github-actions",
"github.vscode-pull-request-github",
"hashicorp.terraform",
"firsttris.vscode-jest-runner",
"github.copilot-chat",
"yoavbls.pretty-ts-errors",
"prisma.prisma",
"bradlc.vscode-tailwindcss",
"orta.vscode-jest"
]
}
```
This works particular well for full stack web development by including tools such as eslint, prettier, prisma, jest, and even terraform.
It can also be a not so subtle hint to the engineers on your team that they should also try some tools such as GitHub.
## Adding a Plugin
You can add the plugin directly into the extensions.json file, but there is an even easier way. If you go to your extensions and click on the cog next to one of them, there is the option to add work workspace recommendations.
## Removing the Plugin
It works the same as above, you just have the option to remove it instead.
## What happens next
When someone clones your repo and opens it up in vscode, they will be prompted to install the plugins that are on the recommendation list and they are missing.
| matthewbill |
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1,881,904 | Building a Audience Analyzer using Lyzr SDK | In the fast-paced world of marketing, understanding your audience is key to success. However,... | 0 | 2024-06-09T08:48:03 | https://dev.to/akshay007/building-a-audience-analyzer-using-lyzr-sdk-1kb6 | In the fast-paced world of marketing, understanding your audience is key to success. However, crafting tailored strategies that resonate with your target demographic can be a daunting task. Enter **Audience Navigator**, a groundbreaking app powered by **Lyzr Automata**, designed to revolutionize the way marketing strategies are developed.
**Audience Navigator** harnesses the power of AI to analyze input about a company’s core values, goals, and target audience. By leveraging advanced natural language processing algorithms, the app generates tailored marketing strategies and actionable steps in minutes, saving marketers valuable time and resources.
Using Lyzr Automata’s Agent technology, Audience Navigator emulates the expertise of a **seasoned copywriter** and **market researcher**. Upon receiving input about the company, the app prompts the AI to conduct in-depth analysis and research, identifying key demographics, pain points, and preferred social media platforms of the target audience.
**Why use Lyzr SDK’s?**
With **Lyzr SDKs**, crafting your own **GenAI** application is a breeze, requiring only a few lines of code to get up and running swiftly.
[Checkout the Lyzr SDK’s](https://docs.lyzr.ai/homepage)
**Lets get Started!**
Create an **app.py** file
```
import streamlit as st
from lyzr_automata.ai_models.openai import OpenAIModel
from lyzr_automata import Agent, Task
from lyzr_automata.pipelines.linear_sync_pipeline import LinearSyncPipeline
from PIL import Image
from lyzr_automata.tasks.task_literals import InputType, OutputType
import os
```
This Python code utilizes **Streamlit** to create a web application integrating Lyzr Automata’s AI capabilities for generating customized marketing strategies. It imports necessary libraries, sets up environment variables for **OpenAI** access, and defines UI elements including a text input field and a button.
The core function utilizes Lyzr Automata’s **Agent** and **Task** classes to generate strategies based on user input. Additionally, an expandable section provides app information and links. This succinctly orchestrates an AI-driven marketing strategy generator within a streamlined web interface.
```
# Set the OpenAI API key
os.environ["OPENAI_API_KEY"] = st.secrets["apikey"]
```
This line sets the **OpenAI API key** as an environment variable, retrieving it securely from Streamlit’s secrets for authentication.
```
input = st.text_input("Welcome to Audience Navigator, powered by Lyzr Automata! Simply input your company's name, core values, and goals to receive tailored marketing strategies and actionable steps, designed to resonate with your target audience and achieve your marketing objectives. Let's navigate your audience together!",placeholder=f"""Type here""")
```
This line of code creates a text input field using **Streamlit**. It prompts users to input their company’s name, core values, and goals, emphasizing the app’s purpose of providing tailored marketing strategies. The placeholder text “Type here” offers guidance on the expected input.
```
open_ai_text_completion_model = OpenAIModel(
api_key=st.secrets["apikey"],
parameters={
"model": "gpt-4-turbo-preview",
"temperature": 0.2,
"max_tokens": 1500,
},
)
```
This code initializes an instance of the **OpenAIModel** class, which serves as the text completion model for generating marketing strategies. It requires an API key obtained from Streamlit’s secrets manager to access OpenAI’s services securely.
Parameters for the **text generation model** are specified, including the model version (“gpt-4-turbo-preview”), temperature (controlling randomness), and maximum number of tokens to generate (limiting the length of the output).
```
def generation(input):
generator_agent = Agent(
role=" COPYWRITER expert",
prompt_persona=f" Your task is to utilize the PROVIDED COMPANY INFORMATION and its goals to thoroughly understand the TARGET AUDIENCE, including DEMOGRAPHICS, INTERESTS, PAIN POINTS, and PREFERRED SOCIAL MEDIA PLATFORMS. You MUST also deliver TAILORED MARKETING STRATEGIES and ACTIONABLE STEPS.")
prompt = f"""
You are an Expert COPYWRITER with a focus on MARKET RESEARCH and STRATEGY DEVELOPMENT. Your task is to utilize the PROVIDED COMPANY INFORMATION and its goals to thoroughly understand the TARGET AUDIENCE, including DEMOGRAPHICS, INTERESTS, PAIN POINTS, and PREFERRED SOCIAL MEDIA PLATFORMS. You MUST also deliver TAILORED MARKETING STRATEGIES and ACTIONABLE STEPS.
[Prompts here]
"""
```
This function, named `generation`, is designed to generate tailored marketing strategies based on user input. It defines an instance of the `Agent` class, representing an expert copywriter tasked with market research and strategy development. The agent is provided with a persona, outlining its role and responsibilities, including utilizing company information to understand the target audience and deliver tailored marketing strategies.
```
generator_agent_task = Task(
name="Generation",
model=open_ai_text_completion_model,
agent=generator_agent,
instructions=prompt,
default_input=input,
output_type=OutputType.TEXT,
input_type=InputType.TEXT,
).execute()
return generator_agent_task
```
The provided Python script defines and executes a text generation task using a task management framework. The `Task` class is instantiated with several parameters. The `name` parameter sets the task’s name to “Generation”.
The `model` parameter specifies the use of a text completion model from OpenAI, referred to as `open_ai_text_completion_model`. The `agent` parameter assigns `generator_agent` as the responsible entity for executing the task. The `instructions` parameter provides a prompt or set of instructions for guiding the text generation, labeled as `prompt`.
The `default_input` parameter sets the default input for the task, called `input`. The `output_type` parameter indicates that the expected output type is text, specified as `OutputType.TEXT`, and the `input_type` parameter indicates that the input type is also text, specified as `InputType.TEXT`.
The `execute` method is called on the instantiated `Task` object, named `generator_agent_task`, which runs the task. Finally, the result of this task execution is returned. This code is part of a larger system that manages multiple tasks and agents, likely for applications involving natural language processing, such as automated content generation.
```
if st.button("Ok"):
solution = generation(input)
st.markdown(solution)
```
The code snippet is part of a S**treamlit** app. When the “Ok” button is clicked, it triggers the `generation` function with `input` as the argument. The result of this function, stored in the variable `solution`, is then displayed in the app as Markdown using `st.markdown(solution)`.
In a world where understanding your audience is paramount, **Audience Navigator** emerges as an essential tool for businesses and marketers alike. By harnessing the power of advanced AI through the Lyzr Automata platform, it delivers personalized, actionable marketing strategies tailored to your unique business needs.
Whether you’re looking to refine your approach or make significant strides in audience engagement, **Audience Navigator** offers the insights and guidance necessary to achieve your goals. Embrace this innovative solution to navigate your audience more effectively and drive your marketing success.
**App link**: https://audience-analyzer-lyzr.streamlit.app/
**Source Code**: https://github.com/isakshay007/Audience_Analyzer
For any inquiries or issues, please contact Lyzr. You can learn more about Lyzr and their offerings through the following links:
**Website**: [Lyzr.ai](https://www.lyzr.ai/)
**Book a Demo**: [Book a Demo](https://www.lyzr.ai/)
**Discord**: [Join our Discord community](https://discord.com/invite/nm7zSyEFA2)
**Slack**: [Join our Slack channel](https://anybodycanai.slack.com/join/shared_invite/zt-2a7fr38f7-_QDOY1W1WSlSiYNAEncLGw#/shared-invite/email) | akshay007 | |
1,881,902 | .gitignore file IGNORED my .env file | I'm learning React. So while developing a project on React, I was using some Appwrite... | 0 | 2024-06-09T08:35:09 | https://dev.to/bkaush/gitignore-file-ignored-my-env-file-3lgf | tutorial, react, programming, javascript | I'm learning React.
So while developing a project on React, I was using some Appwrite functionalities to do the backend stuff easily.
I created a .env file and saved all the necessary keys inside it.
I was about to commit the changes when I saw that the .env file was not showing in dark grayish color, instead showing greenish color in VSCode directory structure.
I understood that .gitignore file might not be considering .env file.
When I opened it, I saw that .gitignore does not have ".env" inside it. So, I wrote it. Then refreshed the directory but it was still showing the same result.
After researching, I found out that I need to delete the .env file and then commit it again.
So, this is how I solved this problem:
1. Copied all the content of .env file in Clipboard and deleted .env file.
2. Created a new .env file and pasted the copied content inside it.
3. Updated .gitignore file by adding `*.env` inside it (Writing `.env` did not work for me).
4. Committed the changes in git
```git add .
git commit -m "Removing the .env file from git"
git push origin main```
| bkaush |
1,881,901 | Automating and Integrating Testing into Your CI/CD Pipeline: Because Who Needs Sleep Anyway? | Today, we're going to dive into the wild world of automating and integrating testing into a CI/CD... | 0 | 2024-06-09T08:34:04 | https://dev.to/spantheslayer/automating-and-integrating-testing-into-your-cicd-pipeline-because-who-needs-sleep-anyway-3bea | devops, cicd, aws, testing | Today, we're going to dive into the wild world of automating and integrating testing into a CI/CD pipeline. Buckle up, because testing is the unsung hero of the CI/CD pipeline—like a superhero with no cape, ensuring your deployments don't go down in flames.
Testing is one of the most important parts of a CI/CD pipeline. Why? Because without it, the automation of the pipeline might just serve to expedite the delivery of your bugs to production. We all love surprises, but your users? Not so much. Implementing tests ensures that what you're shipping is as bug-free as possible. And let's be real: truly bug-free software is as mythical as unicorns. The goal is to catch as many issues as possible before they escape into the wild.
Soooo.... In this blog, we’ll talk about a few types of tests. These aren't all of them—oh no, the testing world is an ever-expanding universe of new ways to find out how badly your code can fail. But we’ll stick to the hits. Let’s get started!
#### Linting: The Grammar Police of Your Code
First up, linting. It's not really a test, but more like spell check for your code. It ensures your syntax is correct, variables are used properly, and you haven't done something monumentally dumb. It's the code equivalent of your mom telling you to clean your room.
#### Unit Testing: Tiny Tasks for Tiny Minds
Unit tests focus on the smallest units of your code. Think of them as testing individual Lego pieces before you build the Death Star. For example, if you have a function that uppercases words, you’d test it by feeding it a lowercase word and checking if it comes out yelling.
#### Functional Testing: Because Unit Tests Are Just Too Easy
Functional testing is a bit more grown-up. Instead of checking individual pieces, you make sure a section of code does what it’s supposed to do. It's like testing if your Lego spaceship can actually fly (spoiler: it can’t, but humor us).
#### Integration Testing: Making Sure Your Code Plays Nice
Integration testing is all about making sure different systems can talk to each other without starting a war. This is crucial for APIs, database connections, and other interactions where one slip-up can lead to chaos.
#### End-to-End Testing: The Full Monty
End-to-end testing is where you test your entire application from the front end to the database, mimicking a user’s journey. It’s like running through a maze blindfolded and hoping you don’t hit a wall.
#### Load Testing: Can It Handle the Heat?
Load testing checks whether your application can handle a surge in traffic. Think of it as stress-testing a bridge by sending a herd of elephants across it. It’s essential for preventing downtime and ensuring performance, as users will quickly abandon a slow or crashing app. Regular load testing keeps your app ready for unexpected traffic surges, making sure it can handle the heat.
#### Chaos Testing: Release the Kraken
Chaos testing is as fun as it sounds. You introduce chaos into your environment to see if it can withstand disasters. Maybe you stop a bunch of EC2 instances or delete a subnet. If your app survives, congrats! You’re ready for the apocalypse.
### Automating and Integrating Testing: Making the Robots Do the Work
Now, let's talk about automating these tests. Because doing it manually is like washing your car in the rain—pointless and frustrating.
There are a couple of ways to run these tests. You can run them locally on your IDE or laptop, which is quick and convenient for linting, unit tests, and some functional tests. However, for the big guns, you’ll need a build server.
A build server is where the magic happens. You can run all your tests—linting, unit, functional, integration, end-to-end, load testing, and even some chaos testing if you’re feeling brave. In our AWS world, we’ll use AWS CodeBuild for this. It compiles your application, runs tests, and can even deploy it. It's like having a personal assistant who’s really good at finding your mistakes.
### The Bottom Line
The more tests you integrate into your CI/CD pipeline, the more you can sleep easy knowing your app will probably not catch fire when it hits production. Probably. That’s it for this one. I hope you’ve enjoyed our little journey through the land of testing. | spantheslayer |
1,881,900 | Discover Your Soulmate: Nearby Muslim Marriage Bureau | On the hunt for a Muslim marriage bureau close to home to help in your search for a life partner?... | 0 | 2024-06-09T08:30:31 | https://dev.to/hazradec0a5b51c71236/discover-your-soulmate-nearby-muslim-marriage-bureau-mco | On the hunt for a [Muslim marriage bureau close to home](https://articles.hazratsultanbahu.com/muslim-marriage-bureau-near-me/) to help in your search for a life partner? Look no further! Our nearby Muslim marriage bureau is at your service, committed to assisting members of the Muslim community in finding their perfect match. With a focus on understanding your beliefs, values, and aspirations, our dedicated team offers personalized matchmaking services tailored to your needs. Whether you lean towards traditional or contemporary approaches, we're here to facilitate meaningful connections. Say goodbye to endless searching and let our local Muslim marriage bureau be your guide on the journey to finding true love and companionship. | hazradec0a5b51c71236 | |
1,881,893 | AI Projects in Python for Beginners: A Step-by-Step Introduction to Artificial Intelligence | Start your journey into artificial intelligence with our beginner-friendly AI projects in Python.... | 0 | 2024-06-09T08:17:05 | https://dev.to/hazradec0a5b51c71236/ai-projects-in-python-for-beginners-a-step-by-step-introduction-to-artificial-intelligence-41de | python, ai | Start your journey into artificial intelligence with our beginner-friendly [AI projects in Python](https://3tiatech.com/ai-projects-in-python-for-beginners/). These projects are designed to make learning AI accessible, guiding you through the development of simple applications like chatbots, image classifiers, and sentiment analysis tools. With comprehensive tutorials and easy-to-follow code examples, you'll gain hands-on experience and a solid understanding of fundamental AI concepts. Perfect for those new to Python and AI, our resources provide a practical and engaging way to start building your skills in machine learning and data science. Dive in and explore the exciting world of AI today! | hazradec0a5b51c71236 |
1,881,891 | Awesome | AI open-framework | Ehy Everybody 👋 It’s Antonio here, CEO & Founder at Litlyx. Today Subject is...... | 0 | 2024-06-09T08:13:11 | https://dev.to/litlyx/awesome-ai-open-framework-2j6j | discuss, beginners, opensource, learning | ## Ehy Everybody 👋
It’s Antonio here, CEO & Founder at [Litlyx](https://litlyx.com).
```bash
Today Subject is... **AI!**
```
I come back to you with a curated **Awesome List of resources** that you can find interesting.
I will contribute to this community as much as I can because I love it.
Share some love to our open-source [repo](https://github.com/Litlyx/litlyx) on git.
## Let’s Dive in!
[](https://awesome.re)
## Awesome AI Open Source Frameworks
A curated list of awesome open-source frameworks for artificial intelligence, machine learning, deep learning, and data science.
## Table of Contents
- [General-Purpose Frameworks](#general-purpose-frameworks)
- [Deep Learning Frameworks](#deep-learning-frameworks)
- [Natural Language Processing (NLP) Frameworks](#natural-language-processing-nlp-frameworks)
- [Computer Vision Frameworks](#computer-vision-frameworks)
- [Reinforcement Learning Frameworks](#reinforcement-learning-frameworks)
- [Data Science Libraries](#data-science-libraries)
- [Related Awesome Lists](#related-awesome-lists)
## General-Purpose Frameworks
- **[TensorFlow](https://www.tensorflow.org/)** - An end-to-end open-source machine learning platform.
- **[PyTorch](https://pytorch.org/)** - An open-source machine learning framework based on the Torch library.
- **[Scikit-learn](https://scikit-learn.org/)** - A simple and efficient tool for data mining and data analysis.
- **[Apache MXNet](https://mxnet.apache.org/)** - A deep learning framework designed for both efficiency and flexibility.
## Deep Learning Frameworks
- **[Keras](https://keras.io/)** - A deep learning API written in Python, running on top of the machine learning platform TensorFlow.
- **[Theano](http://deeplearning.net/software/theano/)** - An open-source symbolic tensor manipulation framework.
- **[Caffe](http://caffe.berkeleyvision.org/)** - A deep learning framework made with expression, speed, and modularity in mind.
- **[Chainer](https://chainer.org/)** - A flexible framework that allows you to train neural networks in a straightforward manner.
## Natural Language Processing (NLP) Frameworks
- **[SpaCy](https://spacy.io/)** - An open-source software library for advanced natural language processing.
- **[NLTK](https://www.nltk.org/)** - A leading platform for building Python programs to work with human language data.
- **[Transformers by Hugging Face](https://huggingface.co/transformers/)** - State-of-the-art natural language processing for PyTorch and TensorFlow 2.0.
## Computer Vision Frameworks
- **[OpenCV](https://opencv.org/)** - Open source computer vision and machine learning software library.
- **[SimpleCV](http://simplecv.org/)** - An open-source framework for building computer vision applications.
- **[Detectron2](https://github.com/facebookresearch/detectron2)** - FAIR’s next-generation research platform for object detection and segmentation.
## Reinforcement Learning Frameworks
- **[OpenAI Gym](https://gym.openai.com/)** - A toolkit for developing and comparing reinforcement learning algorithms.
- **[Stable Baselines3](https://github.com/DLR-RM/stable-baselines3)** - A set of reliable implementations of reinforcement learning algorithms in PyTorch.
- **[RLlib](https://docs.ray.io/en/latest/rllib.html)** - A library for reinforcement learning that offers both high scalability and a unified API.
## Data Science Libraries
- **[Pandas](https://pandas.pydata.org/)** - A fast, powerful, flexible, and easy-to-use open-source data analysis and data manipulation library.
- **[NumPy](https://numpy.org/)** - The fundamental package for scientific computing with Python.
- **[Matplotlib](https://matplotlib.org/)** - A comprehensive library for creating static, animated, and interactive visualizations in Python.
- **[SciPy](https://www.scipy.org/)** - A Python-based ecosystem of open-source software for mathematics, science, and engineering.
## Related Awesome Lists
- **[Awesome Machine Learning](https://github.com/josephmisiti/awesome-machine-learning)** - A curated list of awesome machine learning frameworks, libraries, and software.
- **[Awesome Deep Learning](https://github.com/ChristosChristofidis/awesome-deep-learning)** - A curated list of awesome deep learning tutorials, projects, and communities.
- **[Awesome Data Science](https://github.com/academic/awesome-datascience)** - An awesome list of data science software, tools, and resources.
---
*I hope you like it!!*
Share some love in the comments below.
Antonio, CEO & Founder at [Litlyx.com](https://litlyx.com)
| litlyx |
1,881,867 | Sticky Element - JavaScript & CSS | Halo semua, 2 bulan ini absen posting dikarenakan kesibukan yang padat. Mari kita mulai belajar lagi... | 0 | 2024-06-09T08:08:25 | https://dev.to/boibolang/sticky-element-javascript-css-2fnh | Halo semua, 2 bulan ini absen posting dikarenakan kesibukan yang padat. Mari kita mulai belajar lagi seputar JavaScript dan CSS, kali ini kita akan membahas dan membuat _sticky element_. _Sticky element_ paling sering kita temukan pada navigation bar sebuah website, ada banyak cara untuk membuat sticky element, pada postingan kali ini kita akan membuat dengan 2 cara berbeda. Langsung saja kita buat file index.html, app.js dan style.css
index.html
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Sticky Navigation</title>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<header>
<div class="nav">
<div class="logo">LOGO</div>
<ul class="menu">
<li><a href="#" class="section-1">Section 1</a></li>
<li><a href="#" class="section-2">Section 2</a></li>
<li><a href="#" class="section-3">Section 3</a></li>
<li><a href="#" class="section-4">Section 4</a></li>
</ul>
</div>
<div class="title">
<h1>This is header</h1>
</div>
</header>
<section class="section" id="section-1">This is section 1</section>
<section class="section" id="section-2">This is section 2</section>
<section class="section" id="section-3">This is section 3</section>
<section class="section" id="section-4">This is section 4</section>
<script src="app.js"></script>
</body>
</html>
```
style.css
```css
/* file: style.css */
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
.title {
height: 900px;
background-color: cornflowerblue;
}
.nav {
height: 50px;
width: 100%;
background-color: aqua;
display: flex;
justify-content: space-between;
align-items: center;
font-weight: bold;
}
.nav .logo {
padding-left: 20px;
}
.nav ul {
display: flex;
}
.nav ul li {
list-style: none;
padding-right: 20px;
}
.nav ul li a {
text-decoration: none;
}
.section {
height: 900px;
font-size: 50px;
}
.section:nth-child(odd) {
background-color: greenyellow;
}
.section:nth-child(even) {
background-color: burlywood;
}
.nav.sticky {
position: fixed;
}
```
## Sticky Element Cara Pertama
Kita isi dulu file app.js dengan implementasi smooth scrolling pada materi yang pernah kita bahas [disini](https://dev.to/boibolang/smooth-scrolling-aj1)
```javascript
// file: app.js
const selectors = {
linkSection1: document.querySelector('.section-1'),
linkSection2: document.querySelector('.section-2'),
linkSection3: document.querySelector('.section-3'),
linkSection4: document.querySelector('.section-4'),
section1: document.querySelector('#section-1'),
section2: document.querySelector('#section-2'),
section3: document.querySelector('#section-3'),
section4: document.querySelector('#section-4'),
navbar: document.querySelector('.nav'),
};
// Smooth scrolling
selectors.linkSection1.addEventListener('click', () => {
selectors.section1.scrollIntoView({ behavior: 'smooth' });
});
selectors.linkSection2.addEventListener('click', () => {
selectors.section2.scrollIntoView({ behavior: 'smooth' });
});
selectors.linkSection3.addEventListener('click', () => {
selectors.section3.scrollIntoView({ behavior: 'smooth' });
});
selectors.linkSection4.addEventListener('click', () => {
selectors.section4.scrollIntoView({ behavior: 'smooth' });
});
```
Hasilnya kurang lebih sebagai berikut
Kita ingin pada saat masuk ke Section 1 dan seterusnya, navigation bar-nya muncul. Kurang lebih logic-nya sebagai berikut :
1. Dapatkan koordinat atas (top) Section 1 terhadap koordinat window
2. Jika koordinat window lebih dari koordinat atas (top) Section 1 maka munculkan navigation bar
Mari kita implementasikan pada file app.js
```javascript
// Sticky navbar cara pertama
// 1. Sticky navigation muncul pada saat section 1 tampil, maka harus kita dapatkan koordinat Y section 1
const section1Coord = selectors.section1.getBoundingClientRect();
console.log('Section 1 top:', section1Coord.top);
// 2.Jika tampilan koordinat Y window lebih dari koordinat Y section 1 maka sticky nav muncul
window.addEventListener('scroll', () => {
console.log(window.scrollY);
if (window.scrollY > section1Coord.top) selectors.navbar.classList.add('sticky');
else selectors.navbar.classList.remove('sticky');
});
```
Jika kita inspect halaman, berapa sih koordinat atas (top) section 1 sebenarnya ? Dari kode diatas didapatkan bahwa jarak atas (top) Section 1 terhadap window adalah 950 pixel. Hal ini sebenarnya bisa kita hitung dari tinggi header (900 px) + tinggi navigation bar (50 px).
Maka dengan logic diatas jika window scroll lebih dari 950 pixel maka navigation bar akan muncul, hasilnya sebagai berikut
Metode ini tidak cocok dipakai untuk skala besar karena scroll akan aktif terus menerus selama halaman diakses, dapat menyebabkan performance issue.
## Sticky Element Dengan Intersection Observer API
Apa pula itu Intersection Observer API ? Berikut penjelasan dari website MDN
> The Intersection Observer API provides a way to asynchronously observe changes in the intersection of a target element with an ancestor element or with a top-level document's viewport.
Penjelasan singkatnya adalah intersection observer API akan memonitor posisi target terhadap posisi dokumen. Prakteknya seperti apa ? Mari kita bahas.
Syntax intersection observer API adalah sebagai berikut
`const observer = new IntersectionObserver(obsCallback, obsOptions)`.
_opsCallback_ adalah fungsi/callback yang akan dieksekusi, sedangkan obsOptions adalah parameter yang digunakan.
obsOptions memiliki beberapa parameter
```javascript
obsOptions = {
root: 0,
threshold: 0.1,
rootMargin: '-50px'
}
```
_root_ : adalah posisi dimana intersection dengan target terjadi, jika diisi dengan _null_ artinya terhadap top-level viewport
_threshold_ : adalah kapan akan muncul aksinya, bisa diisi dengan nilai tungal (dalam %) atau array. Jika kita isi 0.1 (sama dengan 10%) maka aksi akan muncul pada jarak 10% pada saat intersection terjadi atau 10% sebelum intersection berakhir
_rootMargin_ : adalah batas (atas-bawah : height) dari element yang beririsan
Lengkapnya seperti ini
```javascript
// Sticky navbar menggunakan intersection observer API
const obsCallback = (entries) => {
entries.forEach((entry) => {
console.log(entry);
});
};
const obsOption = {
root: null,
threshold: 0.1,
rootMargin: '-50px',
};
const observer = new IntersectionObserver(obsCallback, obsOption);
observer.observe(selectors.section1);
```
Perhatikan posisi berikut
Pada saat Section 1 masuk viewport sebesar 0.1 viewport, observer akan mendeteksi. Property yang penting untuk diingat adalah _isIntersection_ dan _intersectionRatio_, pada console nilainya adalah _true (isIntersection)_ dan _0.10105444490909576 (intersectionRatio)_. Jika kita scroll terus sebelum Section 1 habis sebesar 0.1 viewport, observer akan mendeteksi perubahan tapi kali ini nilai dari _isIntersection_ adalah _false_ dan _intersectionRatio_ adalah _0.09617595374584198_
Logic untuk implementasi kira-kira seperti ini
Kapan kita ingin navigation bar muncul ? Pada saat header sudah tidak terlihat, ini berarti property _isIntersection_ bernilai _false_
```javascript
// Sticky navigation bar menggunakan Intersection Observer API
const header = document.querySelector('header');
const navHeight = selectors.navbar.getBoundingClientRect().height;
const stickyNav = (entries) => {
const [entry] = entries;
if (!entry.isIntersecting) selectors.navbar.classList.add('sticky');
else selectors.navbar.classList.remove('sticky');
};
const headerObserver = new IntersectionObserver(stickyNav, {
root: null,
threshold: 0,
rootMargin: `-${navHeight}px`,
});
headerObserver.observe(header);
```
Hasilnya sebagai berikut
_Note : console log untuk intersection observer gambarnya kurang jelas, bisa dicoba sendiri di browser masing-masing_ | boibolang | |
1,867,387 | Database Sharding for System Design Interview | A complete guide of database sharding for system design, why use it and how it works for your system design interview. | 0 | 2024-06-09T08:05:27 | https://dev.to/somadevtoo/database-sharding-for-system-design-interview-1k6b | programming, systemdesign, development, softwaredevelopment | ---
title: Database Sharding for System Design Interview
published: true
description: A complete guide of database sharding for system design, why use it and how it works for your system design interview.
tags: programming, systemdesign, development, softwaredevelopment
# cover_image: https://direct_url_to_image.jpg
# Use a ratio of 100:42 for best results.
# published_at: 2024-05-28 09:05 +0000
---
*Disclosure: This post includes affiliate links; I may receive compensation if you purchase products or services from the different links provided in this article.*
[](https://bit.ly/3pMiO8g)
image_credit - [Design Guru](https://bit.ly/3pMiO8g)
Hello friends, in this data driven world, the ability to efficiently handle vast amounts of data is crucial for businesses and organizations.
Traditional monolithic databases often struggle to keep pace with the demands of modern applications and services and become performance bottleneck.
This is where **database sharding** comes into play, offering a powerful solution for **horizontally scaling your data.**
If you don't know what is Sharding? Well, Sharding is a database architecture technique that involves partitioning a large database into smaller, more manageable pieces, called "shards," which are distributed across multiple servers.
Each shard contains a subset of the data, and together they form the complete dataset. This approach enhances performance and scalability by distributing the workload, reducing latency, and enabling parallel processing.
Sharding is particularly useful for handling large-scale applications and high-traffic systems, ensuring that no single server becomes a bottleneck, and it improves the overall efficiency and reliability of the database system.
In the past, I have talked about common system design questions like [API Gateway vs Load Balancer](https://dev.to/somadevtoo/difference-between-api-gateway-and-load-balancer-in-system-design-54dd) and [Horizontal vs Vertical Scaling](https://dev.to/somadevtoo/horizontal-scaling-vs-vertical-scaling-in-system-design-3n09), [Forward proxy vs reverse proxy](https://dev.to/somadevtoo/difference-between-forward-proxy-and-reverse-proxy-in-system-design-54g5) and in this comprehensive **database sharding guide**, you will learn about database sharding, exploring its concepts, benefits, implementation strategies, and real-world use cases.
Sharding is also an important topic for system design interview because
because it demonstrates an understanding of how to handle large-scale data and improve the performance and scalability of systems, which is key skill and experience for developers.
In these interviews, candidates are often evaluated on their ability to design systems that can efficiently manage high traffic and large amounts of data. Sharding showcases knowledge of distributed systems, database management, and the ability to address potential bottlenecks and failure points.
It reflects a candidate's ability to design resilient, high-performing, and scalable architectures, which are critical skills for building robust and efficient software systems in real-world scenarios.
By the way, If you are preparing for System design interviews and want to learn System Design in depth then you can also checkout sites like [**ByteByteGo**](https://bit.ly/3P3eqMN), [**Design Guru**](https://bit.ly/3pMiO8g), [**Exponent**](https://bit.ly/3cNF0vw), [**Educative** ](https://bit.ly/3Mnh6UR)and [**Udemy** ](https://bit.ly/3vFNPid)which have many great System design courses and here is a nice system design interview cheat sheet from Exponent to quickly revise essential System design concepts for interviews.
[](https://bit.ly/3cNF0vw)
***P.S. Keep reading until the end. I have a bonus for you.***
## Database Sharding for System Design
Now, let's learn what is Database sharding? why you need it and how it helps with scaling your application. We also see different types of database sharding like hash based and range-based sharding.
Table of Contents
1. Introduction
2. What is Database Sharding?
3. Why Sharding? The Need for Scalability
4. How Does Database Sharding Work?
5. Sharding Strategies
6. Challenges and Considerations
7. Real-World Use Cases
8. Implementing Database Sharding
9. Best Practices
10. Conclusion
## 1\. Introduction
In today's data-driven world, businesses and organizations are inundated with vast amounts of information. Managing and processing this data efficiently is a challenge that traditional monolithic databases struggle to meet.
As user bases grow, application workloads increase, and the demand for real-time analytics soars, the need for scalable database solutions becomes paramount.
> This is where database sharding enters the scene as a powerful tool for achieving horizontal scalability.
[](https://bit.ly/3Mnh6UR)
------
## 2\. What is Database Sharding?
**Database sharding is a database architecture strategy used to divide and distribute data across multiple database instances or servers.** The term "shard" refers to a partition or subset of the overall dataset.
Each shard operates independently and contains a portion of the data. By distributing data across multiple shards, a system can achieve horizontal scalability, allowing it to handle larger data volumes and higher workloads.
Sharding is especially beneficial for applications with rapidly growing datasets or high-throughput requirements, such as social media platforms, e-commerce websites, and gaming applications.
It enables these applications to distribute the database load across multiple servers or clusters, preventing any single database server from becoming a bottleneck.
Here is a **simple diagram which explains database sharding as Horizontal scaling:**
[](https://bit.ly/3P3eqMN)
------
## 3\. Why database Sharding? The Need for Scalability
Now, let's see why do we need databse sharding
### 3.1. Scalability Challenges in Monolithic Databases
Traditional monolithic databases have limitations when it comes to scalability. In a monolithic architecture, all data is stored in a single database instance.
As data volume and user load increase, a monolithic database can face several challenges:
- **Performance Bottlenecks:** A single database server can become a performance bottleneck, leading to slow query response times and application downtime.
- **Limited Storage:** The storage capacity of a single server is finite, making it difficult to handle extremely large datasets.
- **Vertical Scaling Costs**: Scaling vertically by upgrading hardware can be expensive and has diminishing returns.
- **Complexity:** Managing a large monolithic database can be complex and error-prone, requiring extensive maintenance and optimization.
### 3.2. The Solution: Horizontal Scalability with Sharding
Database sharding addresses these scalability challenges by distributing the data across multiple shards, each residing on separate database servers or clusters. This approach offers several advantages:
- **Improved Performance:** Sharding spreads the database load evenly across multiple servers, resulting in better query performance and responsiveness.
- **Infinite Scalability:** As data grows, new shards can be added, allowing for nearly unlimited scalability.
- **Cost-Effective:** Sharding can be a cost-effective solution compared to continually upgrading a single server.
- **High Availability**: Sharding can improve fault tolerance and availability since the failure of one shard does not affect the entire system.
Here is how horizontal sharding and vertical sharding of database look like
[](https://medium.com/javarevisited/top-3-system-design-cheat-sheets-templates-and-roadmap-for-software-engineering-interviews-53012952db28)
------
### 4\. How Does Database Sharding Work?
The core idea behind database sharding is to partition data into smaller, manageable pieces called shards. Each shard is a self-contained database subset that stores a portion of the overall dataset.
Shards can be distributed across multiple database servers or clusters**, allowing for parallel processing and improved performance.
Here's a high-level overview of how database sharding works:
You can see that database sharding offers a logical way to split your data horizontally across multiple servers and clusters.
### 4.1. Data Partitioning
The first step in sharding is deciding how to partition the data. There are several common partitioning strategies, which we'll explore in detail in the next section.
The choice of partitioning strategy depends on the application's requirements and data distribution.
### 4.2. Shard Key
A **shard key** is a field or attribute used to determine which shard a particular piece of data belongs to. It's essential to choose an appropriate shard key that evenly distributes data across shards to prevent hotspots (shards that receive significantly more traffic than others).
### 4.3. Data Distribution
Once the data is partitioned and a shard key is chosen, data is distributed among the available shards. The distribution process can be automated and typically involves a sharding mechanism or service that routes data to the correct shard based on the shard key.
### 4.4. Query Routing
When a query or request is made to the database, a query router or coordinator determines which shard or shards to query based on the shard key. Queries that involve multiple shards may require coordination and aggregation of results.
### 4.5. Aggregation
In some cases, query results from multiple shards may need to be aggregated to produce a final result. This aggregation can happen at the application level or through a dedicated aggregation layer.
### 4.6. Data Consistency
Ensuring data consistency across shards is a critical aspect of sharding. Techniques like two-phase commit or eventual consistency are used to maintain data integrity.
[](https://www.java67.com/2019/09/top-5-courses-to-learn-system-design.html)
------
## 5\. Sharding Strategies
Choosing the right sharding strategy is crucial for the success of a sharded database system. The choice depends on the nature of the data, access patterns, and scalability requirements. Here are some common sharding strategies:
### 5.1. Range-Based Sharding
Range-based sharding involves partitioning data based on a specific range of values in the shard key. For example, if you are sharding customer data, you might use a range-based strategy where each shard contains customers with last names starting with a specific letter or falling within a specific range.
Range-based sharding is useful when data distribution is not uniform, and you want to keep related data together within a shard.
Here is an example of range based sharding by [DesignGuru.io](https://bit.ly/3pMiO8g):
[](https://bit.ly/3pMiO8g)
------
### 5.2. Hash-Based Sharding
Hash-based sharding uses a hash function to map the shard key to a specific shard. This approach evenly distributes data across shards and helps avoid hotspots.
Hash-based sharding is particularly effective when data access patterns are unpredictable or when you want to ensure an even distribution of data.
Here is an example of hash based sharding on database by [DesignGuru.io](https://bit.ly/3pMiO8g):
[](https://bit.ly/3pMiO8g)
------
### 5.3. Directory-Based Sharding
Directory-based sharding maintains a central directory that maps shard keys to their corresponding shards. This directory helps route queries to the appropriate shards efficiently. However, it can introduce a single point of failure.
Directory-based sharding is suitable for scenarios where you need to maintain a high level of control over shard assignment.
Here is an example of directory based sharding by [DesignGuru.io](https://bit.ly/3pMiO8g)
[](https://bit.ly/3pMiO8g)
-----
### 5.4. Geographical Sharding
Geographical sharding is relevant when dealing with location-based data, such as users' locations. Data is partitioned based on the geographic regions associated with the shard key.
This strategy is valuable for applications with geographically distributed users or data.
And as they said, a picture is worth 1000 words, here is a nice diagram from [**Architecture Notes**](https://architecturenotes.co/database-sharding-explained/) which explains different types of database sharding
credit --- <https://architecturenotes.co/database-sharding-explained/>
-------
## 6\. Challenges and Considerations
While database sharding offers significant benefits, it also comes with its set of challenges and considerations:
6.1. Data Migration
Migrating data between shards can be complex and time-consuming. Proper planning and tooling are essential to ensure a smooth migration process.
6.2. Backup and Recovery
Managing backups and ensuring data recovery across multiple shards requires careful planning and robust backup solutions.
6.3. Query Complexity
Queries that involve data from multiple shards can be complex to implement and optimize. Application code may need to handle query routing and result aggregation.
6.4. Data Consistency
Maintaining data consistency in a sharded environment can be challenging. Developers need to consider factors like distributed transactions, conflict resolution, and eventual consistency.
6.5. Monitoring and Scaling
Effective monitoring and scaling strategies are essential to ensure the health and performance of a sharded database. Identifying performance bottlenecks and adding new shards as needed is crucial.
-----
## 7\. Real-World Use Cases of Database sharding
Database sharding is employed in various real-world scenarios where scalability and performance are paramount. Let's explore a few notable examples:
7.1. Social Media Platforms
Social media platforms like Facebook, Twitter, and Instagram handle massive amounts of user-generated content, including posts, images, and videos. Sharding enables these platforms to distribute and manage user data efficiently.
7.2. E-commerce Websites
E-commerce websites face intense traffic fluctuations, especially during sales events. Sharding helps them handle increased loads and deliver a seamless shopping experience.
7.3. Gaming Applications
Online gaming applications often require real-time interaction and low-latency response times. Sharding ensures that game data is distributed for optimal performance.
7.4. Financial Services
Financial institutions process vast amounts of transaction data daily. Sharding allows them to scale their databases to handle the load while maintaining data integrity.
------
## 8\. How to implement Database Sharding?
Implementing database sharding requires careful planning and execution. Here are the steps involved:
8.1. Assessment and Planning
Begin by assessing your application's scalability requirements and data distribution patterns. Choose an appropriate sharding strategy and shard key.
8.2. Database Design
Design your database schema to accommodate sharding. Define how data will be partitioned and distributed across shards.
8.3. Sharding Implementation
Implement the sharding mechanism or use a sharding database system that suits your chosen strategy. Distribute existing data across shards.
8.4. Query Routing
Develop a query routing mechanism that directs queries to the appropriate shards based on the shard key. Handle query aggregation if necessary.
8.5. Data Consistency
Implement data consistency mechanisms, such as distributed transactions or eventual consistency, to maintain data integrity.
8.6. Testing and Optimization
Thoroughly test the sharded database system, optimize queries, and monitor performance. Scale the system as needed.
And let me tell you a secret, sharding can also make your database faster:
----
### 9\. Database Sharding Best Practices
To make the most of database sharding, consider following these best practices:
- **Choose the Right Shard Key:**
Select a shard key that evenly distributes data and avoids hotspots.
- **Monitor and Scale**:
Continuously monitor the health and performance of your sharded database. Add new shards as your data grows.
- **Backup and Disaster Recovery:**
Implement robust backup and recovery procedures to safeguard your data.
- **Data Migration:**
Plan data migration carefully and use efficient tools and processes.
- **Query Optimization:**
Optimize queries for performance in a sharded environment.
- **Data Consistency:**
Understand and implement the appropriate data consistency model for your application.
And, if you need a cheatsheet, here is a nice Database Sharding Cheatsheet from [**ByteByteGo**](https://bit.ly/3P3eqMN) to quickly revise they key sharding concepts
[](https://bit.ly/3P3eqMN)
------
### System Design Interviews Resources:
And, here are curated list of best system design books, online courses, and practice websites which you can check to better prepare for System design interviews. Most of these courses also answer questions I have shared here.
1. [**DesignGuru's Grokking System Design Course**](https://bit.ly/3pMiO8g): An interactive learning platform with hands-on exercises and real-world scenarios to strengthen your system design skills.
2. [**"System Design Interview" by Alex Xu**](https://amzn.to/3nU2Mbp): This book provides an in-depth exploration of system design concepts, strategies, and interview preparation tips.
3. [**"Designing Data-Intensive Applications"**](https://amzn.to/3nXKaas) by Martin Kleppmann: A comprehensive guide that covers the principles and practices for designing scalable and reliable systems.
4. [LeetCode System Design Tag](https://leetcode.com/explore/learn/card/system-design): LeetCode is a popular platform for technical interview preparation. The System Design tag on LeetCode includes a variety of questions to practice.
5. [**"System Design Primer"**](https://bit.ly/3bSaBfC) on GitHub: A curated list of resources, including articles, books, and videos, to help you prepare for system design interviews.
6. [**Educative's System Design Cours**](https://bit.ly/3Mnh6UR)e: An interactive learning platform with hands-on exercises and real-world scenarios to strengthen your system design skills.
7. **High Scalability Blog**: A blog that features articles and case studies on the architecture of high-traffic websites and scalable systems.
8. **[YouTube Channels](https://medium.com/javarevisited/top-8-youtube-channels-for-system-design-interview-preparation-970d103ea18d)**: Check out channels like "Gaurav Sen" and "Tech Dummies" for insightful videos on system design concepts and interview preparation.
9. [**ByteByteGo**](https://bit.ly/3P3eqMN): A live book and course by Alex Xu for System design interview preparation. It contains all the content of System Design Interview book volume 1 and 2 and will be updated with volume 3 which is coming soon.
10. [**Exponent**](https://bit.ly/3cNF0vw): A specialized site for interview prep especially for FAANG companies like Amazon and Google, They also have a great system design course and many other material which can help you crack FAAN interviews.
[](https://bit.ly/3P3eqMN)
image_credit - [ByteByteGo](https://bit.ly/3P3eqMN)
Remember to combine theoretical knowledge with practical application by working on real-world projects and participating in mock interviews. Continuous practice and learning will undoubtedly enhance your proficiency in system design interviews.
----
### 10\. Conclusion
That's all about **Database sharding and how it works**. Database sharding is a powerful strategy for achieving horizontal scalability and handling large volumes of data and high workloads.
By distributing data across multiple shards, organizations can improve performance, ensure high availability, and meet the demands of modern applications.
However, **sharding is not a one-size-fits-all solution** and comes with its own set of challenges and considerations. Proper planning, careful implementation, and adherence to best practices are key to successful sharding.
As data continues to grow in volume and complexity, mastering the art of database sharding becomes increasingly important for businesses and developers alike.
Bonus
-----
As promised, here is the bonus for you, a free book. I just found a new free book to learn Distributed System Design, you can also read it here on Microsoft --- <https://info.microsoft.com/rs/157-GQE-382/images/EN-CNTNT-eBook-DesigningDistributedSystems.pdf>
 | somadevtoo |
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1,881,887 | Deployment Strategies: All at Once, Rolling Deploys, Blue-Green, and Canary Releases | In this post, we'll dive into the chaotic world of deployment strategies—where "All at Once" is like... | 0 | 2024-06-09T07:54:14 | https://dev.to/spantheslayer/deployment-and-delivery-strategies-all-at-once-rolling-deploys-blue-green-and-canary-releases-fd5 | In this post, we'll dive into the chaotic world of deployment strategies—where "All at Once" is like jumping off a cliff, "Rolling Deploys" are a slow burn, "Blue-Green" is the responsible adult, and "Canary Releases" are like sending the interns into the fire first.
#### All at Once Deployment
In the high-risk, high-reward world of All at Once deployment, all users are directed to the current version of the application (let's call it the "Blue" version). When an update is necessary, the existing Blue environment gets a makeover, and voilà—all users are switched to the new version simultaneously. It's like flipping a switch and hoping the lights don't explode.
**Pros:**
- **Fast Deployment:** Users get the latest version instantly—no waiting, no teasing.
- **Cost-Effective:** No need for extra infrastructure. Who needs a safety net, right?
**Cons:**
- **Potential Downtime:** If the new version crashes, well, enjoy the ride to Downtime City.
- **Difficult Rollback:** Rolling back means reinstalling the previous version and undoing database changes. Fun times ahead.
#### Rolling Deploy
Rolling Deploys are for those who prefer a slow and steady approach—like sipping tea while watching paint dry. Users start with the current Blue version, and when it’s time to update, a percentage of users are gently nudged to the new Green version.
**Pros:**
- **Limited Blast Radius:** Only some users will be affected by the bugs. It’s like sending only a few people to check if the floor is lava.
- **Easy Rollback:** Redirecting traffic back to Blue is as simple as changing lanes on a highway (assuming there's no traffic jam).
**Cons:**
- **Slower Deployment:** This process takes its sweet time. Perfect for those who enjoy watching progress bars inch forward.
- **Application Support:** The app must support multiple live versions, because why not add more complexity?
#### Blue-Green Deployment
Blue-Green Deployment is the responsible adult in the room. Users start on the Blue environment while a shiny new Green environment is created. Once the Green environment is ready, all users switch to it at once. Blue sticks around just in case Green decides to throw a tantrum.
**Pros:**
- **Compatibility:** Any application can handle this. It's the universal donor of deployment strategies.
- **Easy Rollback:** Switch back to Blue quickly if Green starts misbehaving. No harm, no foul.
- **Faster Deployment:** All traffic shifts at once—less waiting, more doing.
**Cons:**
- **Infrastructure Costs:** Maintaining two environments can be pricey, but hey, peace of mind isn't cheap.
#### Canary Release
Canary Releases are the ultimate test of bravery. A new Green environment is created alongside the trusty Blue. A small percentage of users (the brave souls) are directed to the Green environment first. If they survive, more users are gradually switched over.
**Pros:**
- **Limited Exposure to Bugs:** Only a small group faces the initial onslaught of bugs. It’s like a digital Hunger Games.
- **Easy Rollback:** Traffic can be easily reverted back to Blue if Green starts acting up.
**Cons:**
- **Slower Deployment:** The incremental process can drag on longer than a never-ending staff meeting.
### A/B Testing
A/B Testing is like Canary Release's quirky cousin. Instead of releasing a whole new version, you're testing out a new feature on a subset of users to see if they like it. If they do, it might make it to the big leagues.
**Summary**
Understanding these deployment and delivery strategies is like picking your poison—each method has its benefits and trade-offs. Whether you prefer the thrill of an All at Once jump or the meticulous planning of a Blue-Green switch, choosing the right approach depends on your appetite for risk, patience, and budget. Happy deploying! | spantheslayer | |
1,881,886 | Stop Using TypeScript Interfaces | Why You Should Use Types Instead Join our Vibrant Discord Community for exclusive... | 0 | 2024-06-09T07:40:26 | https://dev.to/afzalimdad9/stop-using-typescript-interfaces-1lc2 | javascript, webdev, programming, typescript | ## Why You Should Use Types Instead
Join our [Vibrant Discord Community](https://discord.com/invite/C2PXBMqpuV) for exclusive information and insightful discussions
**Types and Interfaces** are profound features used inside every TypeScript program.
However, since types and interfaces are quite similar in function, it begs the question: _**Which is better?**_
Today, we will evaluate types and interfaces, then reach a conclusion as to why you should use types over interfaces in most scenarios.
**So without further ado… Lets dive right in.**
## **So What Are The Differences?**
Let’s analyze this `Person` **type** and **interface** definition:
```
type Person = {
name: string
age: number
}
interface Person {
name: string
age: number
}
```
It is clear types and interfaces have similar syntax, with the key difference being that the type uses `=` to define the shape of an object unlike the interface.
However, there is much more to it than this.
Let’s dig deeper to explore and evaluate types and interfaces together.
## **Extensibility**
In terms of extensibility, many argue interfaces are obvious winners since interfaces may extend other interfaces using `extends`.
```
// Extensibility Example
interface Person extends Job {
name: string
age: number
}
interface Job {
job: string
}
// Properties of Person & Job used.
const person: Person = {
name: "John",
age: 25,
job: "Full-Stack Web Developer",
}
```
Here the `Person` interface `extends` `Job`, and as a result the properties of the `Job` interface merge into `Person`.
On the other hand, types also offer extensibility by leveraging the **union** `|` or **intersection** `&` operators to merge existing types.
**Interfaces cannot express this behavior directly.**
```
// ✅ Works
type Person = {
name: string
age: number
} & { job: string }
// ❌ Does not work
interface Person {
name: string
age: number
} & { job: string }
```
## **Implementation**
Interfaces in TypeScript are compatible with Object Oriented Programming (OOP) like in other languages, e.g. **Java** or **C#**.
This means interfaces can be implemented in classes using `implements`.
Let’s now define `Person` as a `class`, and implement a new interface called `Work` and satisfy the contract between them.
```
// Implementation Example
interface Work {
doWork: () => void
}
class Person implements Work {
name: string
age: number
constructor(name: string, age: number) {
this.name = name
this.age = age
}
// doWork method implemented to satisfy the `Work` interface.
doWork() {
console.log("Working...")
}
}
const person = new Person("John", 25)
person.doWork()
```
Therefore if you use OOP frequently, interfaces will be more applicable than types, as types cannot be directly implemented by classes.
## **Performance**
When it comes to performance, we are talking about the performance of **“type-checking”** done by the TypeScript compiler, which decreases exponentially as your codebase increases in size.
This is why we benchmark which of types or interfaces are superior in terms of type-checking performance.
Here is a video where [Matt Pocock](https://www.mattpocock.com/) explains the differences between types and interfaces, and why there is actually **ZERO** difference in type-checking performance between types and interfaces.
Types vs Interfaces: 0 Performance Difference
## **Why Interfaces Could be Harmful**
Interfaces in TypeScript have a unique feature called [Declaration Merging](https://www.typescriptlang.org/docs/handbook/declaration-merging.html).
Declaration merging is when the TypeScript compiler merges **two or more** interfaces with identical names into **one**.
```
// Initial Person Interface
interface Person {
name: string
age: number
}
// Refining the Person interface using "Declaration Merging"
interface Person {
gender: string
}
// Using the "Merged" interface to define a new "person"
const person: Person = { name: "John", age: 25, gender: "Male" }
```
On the one hand, this feature allows for convenient refinement and extension of existing interfaces without changing other dependencies.
Here is an example of me re-declaring the `@auth/core/types` module and refining the `Session` interface.
Refining the @auth/core interface
This is an example of **declaration merging** because I refine the original interface with a new `id: string` attribute.
This is a **justifiable** use case for interfaces because it allows developers to extend library interfaces with ease.
**Types do not permit this since they are immutable after creation.**
On the other hand, declaration merging can have detrimental and surprising effects on your codebase for these two main reasons:
1. **Order of Precedence:** Later declarations always take precedence of prior ones. If not careful, this could lead to unexpected issues when declaration merging occurs in many parts of your program.
2. **Unsafe Merging with Classes:** Since the TypeScript compiler doesn’t check for property initialization, this could lead to unexpected runtime errors.
Types do not have this problem, and hence are more straightforward and safe to use as a result.
## **Conclusion**
Unless specific interface behaviour is necessary, e.g. extensible refinement or implementation using OOP, your best bet is to stick with **types**.
Types are flexible, straightforward, and avoid pitfalls associated with **declaration merging**.
Types are also identical in performance compared to interfaces, providing you another reason to select types over interfaces in your codebase. | afzalimdad9 |
1,881,882 | A Comprehensive Guide to TypeScript’s `any`, `unknown`, and `never` Types | TypeScript is a superset of JavaScript that adds static type definitions, enabling developers to... | 0 | 2024-06-09T07:35:00 | https://dev.to/dipakahirav/a-comprehensive-guide-to-typescripts-any-unknown-and-never-types-4ba7 | typescript, javascript, webdev, programming | TypeScript is a superset of JavaScript that adds static type definitions, enabling developers to catch errors early during the development process. Among its many features, TypeScript includes several special types—`any`, `unknown`, and `never`—each serving a distinct purpose. Understanding the differences and proper use cases for these types is crucial for writing robust and maintainable code. This guide aims to provide a comprehensive overview of these types, highlighting their characteristics, use cases, and examples.
please subscribe to my [YouTube channel](https://www.youtube.com/@DevDivewithDipak?sub_confirmation=1
) to support my channel and get more web development tutorials.
## The `any` Type
The `any` type is the most permissive type in TypeScript. It essentially disables type checking for a variable, allowing it to hold any value and enabling any operation to be performed on it.
### Characteristics of `any`:
- **Disables Type Checking**: Variables of type `any` can be assigned any value without type errors.
- **Maximum Flexibility**: Useful for scenarios where the type is dynamic or unknown at compile time.
- **Potentially Unsafe**: Overuse can lead to runtime errors and reduce the benefits of TypeScript's type system.
### Example Usage:
```typescript
let dynamicVar: any;
dynamicVar = 10; // Valid
dynamicVar = "Hello"; // Valid
dynamicVar = true; // Valid
console.log(dynamicVar.toUpperCase()); // No compile-time error, but may cause runtime error if dynamicVar is not a string
```
### Appropriate Use Cases:
- **Interfacing with Third-Party Libraries**: When using libraries without TypeScript definitions.
- **Prototyping**: Rapidly prototyping code where types are not yet established.
## The `unknown` Type
Introduced in TypeScript 3.0, the `unknown` type is a safer alternative to `any`. It represents a value that could be of any type, but unlike `any`, it requires explicit type checking before use.
### Characteristics of `unknown`:
- **Type-Safe**: Requires type assertions or checks before performing operations.
- **Encourages Safer Code**: Prevents unintended operations by enforcing type checks.
### Example Usage:
```typescript
let uncertainVar: unknown;
uncertainVar = 10; // Valid
uncertainVar = "Hello"; // Valid
if (typeof uncertainVar === "string") {
console.log(uncertainVar.toUpperCase()); // Safe
} else {
// This would cause a compile-time error
// console.log(uncertainVar.toUpperCase()); // Error
}
```
### Appropriate Use Cases:
- **Handling External Data**: Processing values from APIs or user inputs where the type is not guaranteed.
- **Generic Programming**: Writing functions that handle various types with runtime type checks.
## The `never` Type
The `never` type represents values that never occur. It is used to indicate that a function never returns a value, either because it always throws an exception or it enters an infinite loop.
### Characteristics of `never`:
- **Represents Unreachable Code**: Used in functions that do not complete normally.
- **Subtype of Every Type**: `never` can be assigned to any type, but no type can be assigned to `never`.
### Example Usage:
```typescript
function throwError(message: string): never {
throw new Error(message);
}
function infiniteLoop(): never {
while (true) {
// Loop forever
}
}
function fail(): never {
return throwError("Something went wrong!");
}
```
### Appropriate Use Cases:
- **Error Handling**: Functions that throw exceptions to indicate errors.
- **Infinite Loops**: Functions designed to run indefinitely.
- **Exhaustiveness Checking**: Ensuring all possible cases are handled in a `switch` statement or union type.
### Exhaustiveness Checking Example:
```typescript
type Shape =
| { kind: "circle"; radius: number }
| { kind: "square"; side: number };
function getArea(shape: Shape): number {
switch (shape.kind) {
case "circle":
return Math.PI * shape.radius ** 2;
case "square":
return shape.side ** 2;
default:
// Ensures all cases are handled
const _exhaustiveCheck: never = shape;
throw new Error(`Unhandled shape: ${_exhaustiveCheck}`);
}
}
```
## Conclusion
Understanding the distinctions between `any`, `unknown`, and `never` is essential for leveraging TypeScript's type system effectively. Using `any` provides flexibility at the cost of type safety, while `unknown` offers a balance by enforcing type checks. The `never` type, though less commonly used, is vital for indicating unreachable code and ensuring exhaustive checks. By applying these types appropriately, developers can write more predictable, maintainable, and robust TypeScript code.
*Follow me for more tutorials and tips on web development. Feel free to leave comments or questions below!*
### Follow and Subscribe:
- **Website**: [Dipak Ahirav] (https://www.dipakahirav.com)
- **Email**: dipaksahirav@gmail.com
- **Instagram**: [devdivewithdipak](https://www.instagram.com/devdivewithdipak)
- **YouTube**: [devDive with Dipak](https://www.youtube.com/@DevDivewithDipak?sub_confirmation=1
)
- **LinkedIn**: [Dipak Ahirav](https://www.linkedin.com/in/dipak-ahirav-606bba128) | dipakahirav |
1,881,954 | Integrating Confluence with Azure OpenAI for Seamless Updates | This Blog post will tell you how easy it will be to integrate external data into Copilot in a quick... | 0 | 2024-06-23T17:27:50 | https://blog.bajonczak.com/how-to-index-confluence-with-azure-ai-search/ | ai, githubcopilot, groundingdata, confluence | ---
title: Integrating Confluence with Azure OpenAI for Seamless Updates
published: true
date: 2024-06-09 07:30:13 UTC
tags: AI,Copilot,GroundingData,Confluence
canonical_url: https://blog.bajonczak.com/how-to-index-confluence-with-azure-ai-search/
---
This Blog post will tell you how easy it will be to integrate external data into Copilot in a quick way, with... maybe low code.
# The problem.
A complex Project with multiple information streams, BUT streamlined in one system called confluence from Atlassian. Nice tool, but I wanted to get the latest information on what happened in the project to stay up to date.
So I tried to figure out how I can find a good way to get a solution for this, that will fit all of my colleagues.
# The Source
So the source is several pages in confluent. Like meeting minutes. Documentation about processes, and some information about vacation and stuff.
# Adding Data to Azure Openai
So at first, we must get the data into a storage that can be easily accessed via the search open ai. So that we can add this as external data. You can use a high-cost connector, but you can work around this wit a small script like this
```
import requests
from requests.auth import HTTPBasicAuth
from azure.storage.blob import BlobServiceClient, BlobClient, ContainerClient
import json
import os
# Confluence API Details
confluence_base_url = 'https://DOMAIN.atlassian.net/wiki/rest/api/content'
parent_page_id = 'ROOTPAGEID'
auth = HTTPBasicAuth('EMAILADRESS', 'APITOKEN')
# Azure Blob Storage Details
azure_connection_string = 'YOURCONNECTIONSTRING'
container_name = 'YOURTARGETCONTAINERNAME'
# Initialize Blob Service Client
blob_service_client = BlobServiceClient.from_connection_string(azure_connection_string)
container_client = blob_service_client.get_container_client(container_name)
# Create container if it doesn't exist
try:
container_client.create_container()
except Exception as e:
print(f"Container already exists or could not be created: {e}")
# Function to upload content to Azure Blob Storage
def upload_to_azure_blob(content, blob_name,metadata):
try:
blob_client = container_client.get_blob_client(blob_name)
blob_client.upload_blob(content, overwrite=True)
blob_client.set_blob_metadata(metadata)
print(f"Uploaded {blob_name} to Azure Blob Storage.")
except Exception as e:
print(f"Failed to upload {blob_name}: {e}")
# Function to get child pages
def get_child_pages(parent_id):
url = f"{confluence_base_url}/{parent_id}/child/page"
response = requests.get(url, auth=auth)
response.raise_for_status() # Raise an exception for HTTP errors
return response.json()['results']
# Function to get page content
def get_page_content(page_id):
url = f"{confluence_base_url}/{page_id}"
params = {'expand': 'body.storage,version'}
response = requests.get(url, auth=auth, params=params)
response.raise_for_status() # Raise an exception for HTTP errors
data = response.json()
title = data['title']
body_content = data['body']['storage']['value']
created_date = data['version']['when']
return title, body_content, created_date
# Recursive function to process pages
def process_page(page_id, path=''):
try:
# Get page content
title, content,created_date = get_page_content(page_id)
# Define blob name based on path and title
blob_name = os.path.join(path, f"{title}.html").replace("\\", "/")
metadata = {'created_date': created_date}
# Upload content to Azure Blob Storage
upload_to_azure_blob(content, blob_name,metadata)
# Get child pages and process them recursively
child_pages = get_child_pages(page_id)
for child in child_pages:
process_page(child['id'], os.path.join(path, title))
except Exception as e:
print(f"An error occurred: {e}")
# Main script
if __name__ == " __main__":
process_page(parent_page_id)
```
This script will navigate recursive through each page and save this as an HTML page. It then will upload it into the Blob storage and add a create date metadata to this.
Before you can run this script, you must add some parameters at the top
```
confluence_base_url = 'https://DOMAIN.atlassian.net/wiki/rest/api/content'
parent_page_id = 'ROOTPAGEID'
auth = HTTPBasicAuth('EMAILADRESS', 'APITOKEN')
# Azure Blob Storage Details
azure_connection_string = 'YOURCONNECTIONSTRING'
container_name = 'YOURTARGETCONTAINERNAME'
```
The Email address is the same address that you will use for login to confluence. You must create an API token to access this. You can create it in your settings and security area of your profile page. Last but not least you must provide the connection string to your storage account and the storage name in which the data will be stored. This container will be created if it does not exist.
# Setup Azure Open AI
Now that we have the data stored in a blob storage, we can set up Azure open ai.
> Please keep in mind, that you may request access to this part in Azure.
The first step is to create a Hub. Microsoft description:
> Hubs are the primary top-level Azure resource for AI studio and provide a central way for a team to govern security, connectivity, and computing resources across playgrounds and projects. Once a hub is created, it is enables developers to self-service create projects and access shared company resources without needing an IT administrator's repeated help.
So a Hub is like a resource group in Azure ;). So create a Hub you must open up the Azure [openai studio](https://ai.azure.com/?ref=blog.bajonczak.com). After that, you navigate on the left side of the navigation to Chat
This will open up the chat playground on the left side on this playground you will see the possibility to adjust the prompting like setting the context, also setting parameters (e.g. how many messages in the past must be recognized). Last but not least the data source setting:
> This blog will not describe the deployment of a model, but please keep in mind, that you must do this. This is done by a small wizard at the bottom of the deployment selection.
So next, we create a new project; this will open up the following dialog:
We don't have an existing project, so we click on "Create new project." It opens up a wizard. That will create first a hub and a project:
The first step is to create a name for the project. I use the name confluence-demo. The next step is to set up the hub. The hub will combine all things together.
So this hub will be included in the resource group "rg-copilot-dev" in west-Europe. It will reference the created open AI services and an Azure AI search. You will be able to develop it with the desired create actions easily. So grab some coffee.
<!--kg-card-begin: html--><iframe src="https://giphy.com/embed/fOlFT7OQz1KzC" width="480" height="355" style frameborder="0" allowfullscreen></iframe><!--kg-card-end: html-->
Because this will create hub resources like a storage account, the key vault, etc.
> Small Advice: I won't want to mess up the subscription with many storage accounts, so it is only for demo purposes. You can adjust it to use another account or key vault.
So, we have created a hub and can add custom data to it.
# Adding your data to the Azure Open AI
After it is finished creating the resources, the dialog will close, and you can now add the new data source:
Just click on Add a new data source. We stored our data in a blob storage, so we are selecting this now.
Next, you can select your blob store. You must set up the connection if it does not exist on the list. For this, you can use the desired wizard (please keep in mind that you must at least have read and list access):
If you add the connection and select it in the first dialog, you will see the containing data:
Now, you must select the path to use for the input data. You can now proceed to the next step to configure the index setting:
Please adjust your indexing schedule. I use one-time indexing for demo purposes. Next, you can add a vector index.
So, it is better to use a vector index because building a little dependency graph will give you a more specific result...
Finally, you can create the datasource. The dialog will close, and the resources will be created. This will take a while.
Now It's done! You can now use your own Confluence data. That will (when it is configured) be indexed frequently, and you will be able to use it within your project to query informational data.
Here is an example result:
The best thing about this is that you are not limited to Confluence for now; you can add more data from Jira or SharePoint, too. So, you get a big data pool for your project or knowledge space. That can be used as a "big brain," and the AI combined with the search and a good vector database will then be a good sparing partner to bring the data together.
# Final Words
Finally, I think that is a good solution for bringing all information together in one particular space. The best thing is that the AI will then analyze and combine the data together (due to the vectorizing). This example solution will be useful in larger projects with many meeting notes/minutes and project documentation spread across a variety of systems. | saschadev |
1,881,881 | Why there are so many assertAll methods in Junit class AssertAll? What is the use of each. | class AssertAll { private AssertAll() { /* no-op */ } static void... | 0 | 2024-06-09T07:29:03 | https://dev.to/kasid_khan_98865d77a5fe2e/why-there-are-so-many-assertall-methods-in-junit-class-assertall-what-is-the-use-of-each-17gk | junit | ```
class AssertAll {
private AssertAll() {
/* no-op */
}
static void assertAll(Executable... executables) {
assertAll(null, executables);
}
static void assertAll(String heading, Executable... executables) {
Preconditions.notEmpty(executables, "executables array must not be null or empty");
Preconditions.containsNoNullElements(executables, "individual executables must not be null");
assertAll(heading, Arrays.stream(executables));
}
static void assertAll(Collection<Executable> executables) {
assertAll(null, executables);
}
static void assertAll(String heading, Collection<Executable> executables) {
Preconditions.notNull(executables, "executables collection must not be null");
Preconditions.containsNoNullElements(executables, "individual executables must not be null");
assertAll(heading, executables.stream());
}
static void assertAll(Stream<Executable> executables) {
assertAll(null, executables);
}
static void assertAll(String heading, Stream<Executable> executables) {
Preconditions.notNull(executables, "executables stream must not be null");
List<Throwable> failures = executables //
.map(executable -> {
Preconditions.notNull(executable, "individual executables must not be null");
try {
executable.execute();
return null;
}
catch (Throwable t) {
UnrecoverableExceptions.rethrowIfUnrecoverable(t);
return t;
}
}) //
.filter(Objects::nonNull) //
.collect(Collectors.toList());
if (!failures.isEmpty()) {
MultipleFailuresError multipleFailuresError = new MultipleFailuresError(heading, failures);
failures.forEach(multipleFailuresError::addSuppressed);
throw multipleFailuresError;
}
}
}
``` | kasid_khan_98865d77a5fe2e |
1,881,880 | Join GitHub Education | Table of Contents Introduction to GitHub Education Qualification Before you begin Drop a... | 0 | 2024-06-09T07:28:08 | https://dev.to/g_venkatasandeepreddy_b/join-github-education-1cge | github, git, student, education | ## Table of Contents
* [Introduction to _GitHub Education_](#introduction)
* [Qualification](#qualification)
* [Before you begin](#before)
* [Drop a Application](#application)
* [Advantages of GitHub Education](#advantage)
## Introduction to GitHub Education<a name="introduction"></a>
**_GitHub Education_** is the concept of _"Empowering the next generation of developers"_. It bridges the gap between coding education and a tech career, and is accessible to everyone globally at no cost.
**_GitHub Education_** is a commitment to bringing tech and open source collaboration to students and educators across the globe.
## Qualification<a name="qualification"></a>
### To qualify for student benefits, you must:
- Have a [GitHub](https://github.com/) account.
- Be at least 13 years old.
- Be currently enrolled in a degree or diploma granting course of study from a recognized educational institution.
- Be able to provide documentation from your school which demonstrates your current student status.
## Before you begin<a name="before"></a>
- Complete your GitHub account [billing information](https://github.com/settings/billing/payment_information) with your full legal name as it appears on your academic affiliation documentation. (You do not have to add a payment method.)
- [Verify](https://github.com/settings/emails) your academic email address on your GitHub account, if your school provides one.
- Secure your GitHub account with [two-factor authentication](https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa). (It is recommended to use the [GitHub Mobile](https://github.com/mobile) app.)
- [Personalize](https://docs.github.com/en/account-and-profile/setting-up-and-managing-your-github-profile/customizing-your-profile/personalizing-your-profile) your public GitHub Profile with your photo, your name, your pronouns, and more.
## Drop a Application<a name="application"></a>
- Navigate to the [GitHub Education](https://github.com/edu/students) page for students in GitHub Portal.
- Click on [Join GitHub Education](https://education.github.com/discount_requests/application) button.
- Make sure that Student is Selected
- Scroll down to Application tab.
- Click on _Select this School_ Button
- Click on _Continue_ Button
- Scroll down to Please upload proof of academic status tab and upload your marks memo (for faster verification).
- Click on _Process my application_
**_Wait 24 hours for verifvation._**
## Advantages of GitHub Education<a name="advantage"></a>
- Free GutHub Pro Account.
- Code in the cloud with GitHub Codespaces.
- Learn faster and code better with GitHub Copilot.
- Start using professional developer tools.
- Become a leader in tech with GitHub Campus Experts.
- Work on real-world projects with Community Exchange.
| g_venkatasandeepreddy_b |
1,881,861 | Toca Boca Mod APK: A New Frontier in Digital Playtime | Toca Boca World Mod APK in the world of digital play, has captured the imagination of children and... | 0 | 2024-06-09T06:56:56 | https://dev.to/tyuiljf/toca-boca-mod-apk-a-new-frontier-in-digital-playtime-26h2 | tocaboca, tocalifeworld, tocalifestories, charactersgame | Toca Boca World Mod APK in the world of digital play, has captured the imagination of children and parents alike with its creative and engaging apps. Known for fostering imagination, creativity, and learning, [Toca Boca Mod APK](https://tocalifesworld.com/
) games offer a safe and ad-free environment for children to explore. However, as with many popular apps, the allure of enhanced features and unlocked content has led to the proliferation of modified versions, or "mod APKs." This encourages creativity and problem-solving skills, as children are free to create their own narratives and solutions within the app's environment.
What is a Mod APK?
A mod APK (short for modified Android Package) is an altered version of the original application. These modifications can range from unlocked premium features, removal of ads, unlimited in-game resources, to enhanced gameplay mechanics. For Toca Boca games, mod APKs often unlock all characters, locations, and items that would typically require in-app purchases.
**The Appeal of Toca Boca Mod APKs**
Access to Premium Content: The most significant draw is the ability to access all the content without spending money. Toca Boca games have various in-app purchases that can add up, especially if a child wants to explore every nook and cranny of the game world.
Enhanced Gameplay: Some mods might offer tweaks that enhance the gaming experience, such as improved controls or additional features not present in the original app.
No Ads: Although Toca Boca prides itself on being ad-free, some versions still have optional in-app purchases that might be seen as intrusive. Mod APKs eliminate these interruptions.
**Popular Toca Boca Apps**
Toca Life Series: This series includes Toca Life: City, Toca Life: School, Toca Life: Hospital, and more. Each app offers a unique setting where children can explore, interact with characters, and create their own stories.
Toca Hair Salon: In this app, children can run their own hair salon, experimenting with different hairstyles, colors, and tools. It encourages creativity and experimentation.
Toca Kitchen: This app lets children cook and serve food to a variety of characters. They can mix ingredients, use different kitchen tools, and see the characters' reactions to their culinary creations.
Toca Nature: Toca Nature allows children to shape and explore their own natural landscapes. They can plant trees, raise mountains, and discover animals, fostering a love for nature and the environment.
| tyuiljf |
1,881,879 | How to create a testimonial carousel with Tailwind CSS and JavaScript | Let's recreate a carousel with Tailwind CSS and JavaScript. Same thing as the previous with... | 0 | 2024-06-09T07:27:02 | https://dev.to/mike_andreuzza/how-to-create-a-testimonial-carousel-with-tailwind-css-and-javascript-4bl3 | javascript, tailwindcss, tutorial | Let's recreate a carousel with Tailwind CSS and JavaScript. Same thing as the previous with Alpine.js, but with JavaScript.
[Read the article,See it live and get the code](https://lexingtonthemes.com/tutorials/how-to-create-a-carousel-with-tailwind-css-and-javascript/)
| mike_andreuzza |
1,881,878 | The Power of Personas and How Might We Questions in User-Centric Design | During my recent project, two concepts that resonated with me deeply were the creation of personas... | 0 | 2024-06-09T07:26:02 | https://victorleungtw.com/2024/06/09/usercentric/ | innovation, personas, brainstorming, usercentric | During my recent project, two concepts that resonated with me deeply were the creation of personas and the use of "how might we" questions. These concepts proved essential in shaping a user-centric approach that directly addressed our client's challenges and needs.
### The Impact of Personas
Creating a detailed persona for Alexa Tan allowed us to understand and empathize with our target audience's needs, motivations, and pain points. This persona guided our solutions to be more user-centric and user-friendly, ensuring we addressed real concerns and delivered real value. By focusing on Alexa's specific characteristics and behaviors, we could tailor our strategies and designs to meet her needs effectively.
In my previous role as a Technical Lead at HSBC, personas were invaluable in understanding the diverse needs of our customers. For instance, while working on a mobile payment project, we developed detailed personas for various stakeholders, such as Shopee users participating in midnight sales in Malaysia. This approach helped us tailor our core banking solutions to meet specific needs, significantly enhancing client satisfaction. Personas provided a clear and focused understanding of different user groups, enabling us to design solutions that resonated with them.
### The Role of "How Might We" Questions
The "how might we" statement was another crucial tool that helped us systematically generate and organize ideas by focusing on specific enablers, such as technology. This approach fostered structured brainstorming sessions, leading to innovative solutions tailored to our persona's needs. The "how might we" questions allowed us to explore various possibilities and prioritize the most impactful ideas.
At HSBC, the "how might we" statement was particularly effective during brainstorming sessions aimed at reducing transaction failure rates. By framing our challenges as questions, we systematically explored innovative solutions within the user journey. This included using different browsers and examining logs at various times. This structured approach ensured that our solutions were aligned with the bank's regulatory requirements and technological capabilities, leading to successful project outcomes.
### Applying These Concepts at Thought Machine
In my current role as a Solution Architect at Thought Machine, personas remain a fundamental tool for deeply understanding our clients' unique needs and challenges. By creating detailed personas, we can tailor our solutions more precisely, ensuring that our core banking systems address specific pain points and deliver maximum value. For example, developing personas for different banking users, such as young Vietnamese consumers, guides us in customizing features that meet their strategic objectives, such as enabling QR code payments for buying coffee.
The "how might we" statement continues to be instrumental in brainstorming and prioritizing innovative solutions. By framing challenges as questions, I can lead my team in systematically exploring and organizing ideas. This comprehensive approach to problem-solving is particularly useful in developing new functionalities for our Vault core banking product or proposing enhancements to existing systems.
### Conclusion
The integration of personas and "how might we" questions into our project workflows has proven to be transformative. These concepts ensure that we remain focused on the user's needs and challenges, driving innovation and delivering user-centric solutions. By applying these principles, we enhance our ability to create impactful, client-centric solutions that drive business success and client satisfaction.
| victorleungtw |
1,881,877 | All you need to know about JSON? | What is JSON? JSON stands for JavaScript Object Notation It is an open standard... | 0 | 2024-06-09T07:25:36 | https://dev.to/bytecodesky/test-hka | webdev, javascript, beginners, programming | ## What is JSON?
### JSON stands for JavaScript Object Notation
It is an open standard file format and data exchange format that employs text that humans can read to store and send data objects made up of attribute-value pairs and arrays (or other serializable values). It is a widely used data format for electronic data exchange, notably between servers and online applications.
## JSON Types
- Strings : `"Angel Barre" "Hello World"`
- Numbers: `13 0.6 -21`
- Booleans: `true, false`
- Arrays : `[1,2,3] ["Hi", "Dev"]`
- Objects: `{"key":"value", "name": "Angel"}`
**NOTE**: _JSON names require double quotes. JavaScript names do not._
## JSON SYNTAX
- Data is in name/value pairs
- Commas are used to separate data
- Curly braces hold objects
- Square brackets hold arrays
### Example:
```json
{
"name":"Angel",
"age":20 ,
"isDeveloper": true,
"languages": ["HTML","CSS","JavaScript","PHP"],
"Idk":null,
"pets":[{"name": "Robert","type" : "Dog"},
{"name": "Max", "type" : "Cat" }]
}
```
## How to access data from a JSON file or Object?
If we load this data as a variable called info, we could then access the data inside it using the same dot/bracket notation. For example:
`info.name` or `info['name']`
### Output:
```json
"Angel"
```
`info.pets[1].name`
### Output
```json
"Max"
```
`info.languages[2]`
### Output
```json
"JavaScript"
```
## Why use JSON?
The syntax of the JSON format is similar to that of the JavaScript object creation code. This makes it simple for a JavaScript code to turn JSON data into JavaScript objects.
JSON data may be used in any programming language and is easily transferable between machines because it is merely in text format.
## Things to keep in mind while writing JSON
1. JSON consists solely of a string with a predefined data format.It has no methods,only properties.
2. JSON requires double quotes to be used around strings and property names. Single quotes are invalid.
3. A single missed comma or colon might cause a JSON file to stop working.
| bytecodesky |
1,881,876 | Promise: How to Use and Some Notes! | It would be a glaring omission not to talk about Promise in JavaScript. In fact, there have been many... | 0 | 2024-06-09T07:24:44 | https://2coffee.dev/en/articles/promise-how-to-use-and-some-notes | javascript, node, promise | It would be a glaring omission not to talk about Promise in JavaScript. In fact, there have been many articles written about Promise, which you can find through Google or occasionally come across in a programming-related community. But because Promise is an important concept and everyone has a different way of explaining it, I still decided to write this article.
When I first learned JavaScript, Promise was the most confusing thing. I thought I understood it and knew how to use it, but in reality, there were still many long and painful stumbles that taught me valuable lessons. I read many articles about Promise in both English and Vietnamese, and gradually everything started to make sense, helping me understand and use it correctly.
This article will not go into the concepts of Promise but rather touch on some notes and possible misunderstandings. It aims to provide readers with a general understanding and help them avoid some mistakes when writing code.
## What is a Promise?
A Promise is an object that represents a future result. In other words, a Promise represents the result of an asynchronous function.
A Promise has three states corresponding to the three possible outcomes of an asynchronous function:
- `pending` is the initial state, waiting for the result.
- `fulfilled` is the successful state, with a result value.
- `rejected` is the failure state, with an optional error value.
For example, let's create a Promise that takes a number `x` and returns the `fulfilled` state if `x` is divisible by 2, and the `rejected` state otherwise.
```js
function isEven(x) {
return new Promise((resolve, reject) => {
if (x % 2 === 0) {
resolve(true);
} else {
reject(new Error('x is not even'));
}
});
}
```
In essence, a Promise represents a future result. In the above example, creating a Promise is not necessary because all the actions inside the `isEven` function are synchronous. So, when should we use a Promise and what makes a function asynchronous?
What makes a function asynchronous? I have mentioned it in many articles. Some I/O tasks provided by asynchronous functions cannot immediately return a result; they depend on external factors such as hardware speed, network speed, etc. Waiting for these actions can waste a lot of time or cause serious bottlenecks.
For example, when making a GET request to the address `https://example.com`, the processing does not simply depend on CPU speed anymore; it also depends on your network speed. The faster the network, the quicker you receive the result. In JavaScript, we have the `fetch` function to send the request, and it is asynchronous, returning a Promise.
```js
fetch('https://example.com');
```
To handle the result of a Promise, we use `then` and `catch` for success and failure cases, respectively.
```js
fetch('https://example.com')
.then(res => console.log(res))
.catch(err => console.log(err));
```
If after some processing time, `fetch` is `fulfilled`, the function inside `then` will be activated. Otherwise, if `fetch` is `rejected`, the function inside `catch` will be executed immediately.
Sometimes you may come across questions like predicting the result of the following example:
```js
console.log('1');
fetch('https://example.com')
.then(res => console.log(res))
.catch(err => console.log(err))
.finally(() => console.log('3'));
console.log('2');
```
This question is actually to test your understanding of asynchronous behavior in JavaScript. The result will be 1, 2, 3 instead of 1, 3, 2. This is because of the nature of asynchronous processing. Since the result of asynchronous behavior will be returned in the future, JavaScript thinks, "OK, this asynchronous function does not have an immediate result yet. Let it be and continue processing the following commands. When everything is done, check if it has a result." For more information on how asynchronous processing works, you can refer to articles on [Asynchronous Programming in JavaScript](https://2coffee.dev/bai-viet/lap-trinh-bat-dong-bo-la-gi-tai-sao-javascript-la-ngon-ngu-lap-trinh-bat-dong-bo).
Promise has some useful static methods for various use cases, such as `all`, `allSettled`, `any`, and `race`.
`Promise.all` takes an array of Promises, returns a Promise, and is in the `fulfilled` state when all Promises in the array are successful. Otherwise, it is in the `rejected` state when at least one Promise in the array fails.
`Promise.allSettled` is similar to `Promise.all` but always returns the results of all Promises in the array regardless of success or failure. Both `Promise.all` and `Promise.allSettled` are useful when you need to run multiple asynchronous functions immediately without caring about the order of the results.
On the other hand, `Promise.race` returns the result of the Promise that is settled first, regardless of success or failure. `Promise.any` returns the first fulfilled Promise in the array. `race` and `any` are suitable when you have multiple Promises that perform similar actions and need a fallback between the results.
## Promise Replaces "Callback Hell"
It is surprising to know that JavaScript used to not have Promise. Yes, you heard it right. This fact led Node.js to also not have Promise in its early days, and that is the biggest regret the creator of Node.js has.
Previously, all asynchronous tasks were handled through callbacks. We would define a callback function to handle the result in the future.
For example, an early asynchronous request function was `XMLHttpRequest`. It handled the result through a callback.
```js
function reqListener() {
console.log(this.responseText);
}
const req = new XMLHttpRequest();
req.addEventListener('load', reqListener);
req.open('GET', 'https://example.com');
req.send();
```
`reqListener` is a function that is called when there is a result from the request to `https://example.com`. Handling asynchronous behavior with callbacks brought some troubles, including what is commonly known as "callback hell".
For example, an asynchronous function `fnA` takes a callback function with two parameters: `data` representing the successful result and `err` representing the error. Similar functions include `fnB`, `fnC`, etc. If we want to combine these processing functions together, we need to nest them inside each other.
```js
fnA((data1, err1) => {
fnB((data2, err2) => {
fnC((data3, err3) => {
....
});
});
});
```
When there are too many callbacks written like this, our code becomes a literal "callback hell". It becomes messy and hinders the reading and understanding process.
Promise was introduced to bring a new approach to handling asynchronous behavior. We still use callbacks, but we are able to limit the "hell" by connecting everything sequentially through `then`.
```js
fnA()
.then(data => fnB(data))
.then(data => fnC(data))
...
.catch(err => console.log(err));
```
After that, many asynchronous callback-based functions were rewritten using `new Promise`. In Node.js, we even have a built-in module called [util.promisify](https://nodejs.org/api/util.html#utilpromisifyoriginal) specifically for this transformation. Callbacks are still supported, but with the benefits that Promise brings, many new libraries are using Promise as the default for handling asynchronous behavior.
## Promise in Loops
There are many unfortunate mistakes when using Promise without fully understanding its essence and one of them is handling sequential asynchronous operations in a loop.
Suppose you need to iterate through 5 pages, making paginated API calls from 1 to 5 and concatenate the return values in order into an array.
```js
const results = [];
for (let i = 1; i <= 5; i++) {
fetch(`https://example.com?page=${i}`)
.then(response => response.json())
.then(data => results.push(data));
}
```
The above code creates a loop to fetch data from page 1 to page 5, and the returned data is pushed into the `results` array. At first glance, the result would be an array of data in the order from the first page to the last page. However, in reality, each time it runs, you will find that the data in `results` is randomly ordered.
Remember `fetch`, it returns a Promise, representing a future result... While `for` is trying to loop through as quickly as possible, you can think of it as all 5 `fetch` commands being called and started "almost instantly". At this point, CPU speed is less important - it's the network speed that determines which `fetch` command has the first result. As soon as it has the result, it immediately pushes it into `results`, resulting in the data being added randomly.
To solve this issue, there are several ways. For example:
```js
const results = [];
fetch('https://example.com?page=1')
.then(response => response.json())
.then(data => {
results.push(data);
return fetch('https://example.com?page=2');
})
.then(response => response.json())
.then(data => {
results.push(data);
return fetch('https://example.com?page=3');
})
...
```
This is crazy, and nobody writes code like this. Imagine what if there were 1000 pages? It's a joke, but the example above attempts to illustrate the idea of how to wait for the previous request to complete before proceeding to the next request.
[Bluebird](https://www.npmjs.com/package/bluebird) is a very good Promise library that provides many utility functions to make working with asynchronous functions easier.
The above example can be rewritten using the `each` function provided by Bluebird.
```js
const results = [];
Promise.each([1, 2, 3, 4, 5], (i) => {
return fetch(`https://example.com?page=${i}`)
.then(response => response.json())
.then(data => results.push(data));
});
```
## Async/Await - The Missing Piece of Promise?
To create a Promise, we use the syntax `new Promise`, but with async/await, we simply declare an `async` function.
```js
async function isEven(x) {
if (x % 2 === 0) {
return true;
} else {
throw new Error('x is not even');
}
}
```
While Promise uses `then` to handle the return result at some point in the future, async/await is as simple as using `await`.
```js
const result = await fetch('https://example.com');
const resultJSON = await result.json();
```
Starting from Node.js version 14.8, we have the top-level await feature, which means `await` calls are no longer limited to inside an `async` function; they can be used outside as well. Before that, `await` could only be used inside an `async` function.
```js
async function getData() {
const result = await fetch('https://example.com');
const resultJSON = await result.json();
}
```
While Promise uses `.catch` to handle errors, async/await uses `try...catch`.
```js
async function getData() {
try {
const result = await fetch('https://example.com');
const resultJSON = await result.json();
} catch (err) {
console.log(err);
}
}
```
It is evident that async/await allows us to write asynchronous code as if it were synchronous, without callbacks and without the need for `then`. We simply wait for the result using `await`.
However, this can also lead to some dangerous misunderstandings, such as forgetting the `await` keyword to wait for the result of an asynchronous behavior or mistakenly thinking that an asynchronous function is a synchronous one.
```js
async function getData() {
try {
const result = await fetch('https://example.com');
const resultJSON = await result.json();
return resultJSON;
} catch (err) {
console.log(err);
}
}
function main() {
const data = getData();
console.log(data);
}
```
In essence, `getData` returns a Promise, so the above program does not work correctly if the intention is to get data from an API call. To fix this, we need to change it.
```js
async function main() {
const data = await getData();
console.log(data);
}
```
## return vs. return await
Sometimes you may come across code that looks like this:
```js
async function fn() {
...
return await asyncFn();
}
```
The function `fn` is returning an `await` of the asynchronous function `asyncFn`. The author probably intended for `fn` to always return the result of `asyncFn`, as `await` is waiting for the result of the asynchronous function, effectively turning `fn` into a synchronous function, or in other words, "not" returning a Promise.
Unfortunately, this is a dangerous misunderstanding. In essence, `await` is only meant to be used at the top-level or inside an `async` function, and if it is `async`, it must return a Promise. Therefore, `fn` always returns a Promise. So why use `return await asyncFn()`?
Simply using `return asyncFn()` can save you a bit of keystrokes, as there is no significant difference compared to `return await asyncFn()`. The big change happens when there is a `try...catch` in `return`.
Let's consider the following two functions:
```js
async function rejectionWithReturnAwait () {
try {
return await Promise.reject(new Error())
} catch (e) {
return 'Saved!'
}
}
async function rejectionWithReturn () {
try {
return Promise.reject(new Error())
} catch (e) {
return 'Saved!'
}
}
```
The first function, `rejectionWithReturnAwait`, is intentionally using `return await`, and when this Promise is rejected, the `catch` block quickly catches the error and executes the `return 'Saved!'` statement. This means the function returns a Promise containing the string 'Saved'.
In contrast, `rejectionWithReturn`, without `await`, is attempting to reject a `Promise.reject(new Error())`, and the `catch` block is never executed.
References:
- [Promise - Mozilla](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise)
- [Top-level await - Node.js v14.8.0](https://nodejs.org/en/blog/release/v14.8.0) | hoaitx |
1,881,875 | Glam Up My Markup: Beaches | This is a submission for Frontend Challenge v24.04.17, Glam Up My Markup: Beaches What I... | 0 | 2024-06-09T07:22:26 | https://dev.to/rith1x/glam-up-my-markup-beaches-4fn8 | devchallenge, frontendchallenge, css, javascript | _This is a submission for [Frontend Challenge v24.04.17](https://dev.to/challenges/frontend-2024-05-29), Glam Up My Markup: Beaches_
## What I Built
For the Frontend Challenge v24.04.17, I transformed the provided HTML markup into a visually appealing and interactive website without modifying the given template. The aim was to showcase the best beaches in the world with enhanced aesthetics and functionality using CSS and JavaScript, while keeping the original HTML structure intact as much as possible.
---
## Demo
Screenshots
Live Demo
[Beach Challenge Demo](https://rith1x.github.io/challenges/beachChallenge/)
Repository Link
[Github Repository](https://github.com/rith1x/Frontend-Challenge-v24.04.17)
---
## Journey
Embarking on this challenge, my primary goal was to breathe life into the static HTML by making it both beautiful and engaging. Here’s a glimpse into my process:
1. Design Concept:
I started by envisioning a serene, beach-themed design. I wanted users to feel like they were virtually visiting these amazing beaches.
2. CSS Enhancements:
+ I used a combination of modern CSS techniques, including flexbox and grid layouts, to create a responsive and visually appealing design.
+ To evoke a beach vibe, I chose a color palette reminiscent of sand, sea, and sky.
+ I incorporated smooth transitions and animations to make the interaction feel more natural and engaging.
3. JavaScript Interactivity:
+ I added interactive elements such as image carousels and effects to display additional information about each beach.
4. Challenges and Learnings:
+ One of the challenges was to add significant interactivity without altering the provided HTML directly. This required creative use of JavaScript to manipulate the DOM dynamically.
+ Through this project, I deepened my understanding of advanced CSS techniques and refined my JavaScript skills, particularly in DOM manipulation and event handling.
---
## Key Aspects
+ For Accessibility, I chose Calm background Sand Color and Blue Color for the elements. I made the Beaches list as a interactive horizontal slider, so there are many elements changing according to the visibility ratio, Used some icons for Fun and accessibility
+ Responsiveness, I added some media queries in CSS to give some Responsible content ony any sized screens
+ I added a fun elements which responds to pageScroll & animation
---
Thank you 🩵 | rith1x |
1,881,869 | amit29x follow me in all social's media accounts | he top 23 social media apps and platforms for 2024 Facebook — amit29x WhatsApp — YouTube... | 0 | 2024-06-09T07:08:20 | https://dev.to/amit29x/amit29x-follow-me-in-all-socials-media-accounts-325m |
he top 23 social media apps and platforms for 2024
1. Facebook — amit29x
2. WhatsApp —
3. YouTube —amit29x
4. Instagram — amit29x
5. WeChat —
6. TikTok —
7. Telegram — amit29x
8. Snapchat — amit29x
9. Kuaishou — amit29x
10. Sina Weibo — amit29x
13. X (formerly Twitter) — amit29x
14. Pinterest — amit29x
15. Reddit — amit29x
16. LinkedIn — amit29x
17. Quora — amit29x
19. Twitch — amit29x
20. Tumblr — amit29x
21. Threads by Instagram — amit29x
22. Mastodon — amit29x
23. Bluesky — amit29x
Be selective with your social media presence | amit29x | |
1,881,461 | useState() Hooks In react , How it Works ? | 👉 useState() Hooks In React useState() hooks is a function that allows you to add a state in... | 0 | 2024-06-09T07:05:43 | https://dev.to/pervez/usestate-hooks-in-react-how-it-works--1oh4 | webdev, javascript, programming, beginners | 👉 **useState() Hooks In React**
useState() hooks is a function that allows you to add a state in functional components. When you call useState() hooks, it returns an array with two elements.
➡️ **State Variable:** The current value of the state.
➡️ **State Updater Function:** This function allows you to update the state variable.
**👉 Example :**
➡️ **state:** The current state value.
➡️ **setState :** A function to update the state.
➡️ **initialState :** The initial value of the state.
**Key Points 👍 :**
➡️ **Initialization:** When the component first renders, useState(initialState) sets up a state variable (state) and a function (setState) to update that state. The initialState can be any type of value: number, string, object, array, etc.
➡️ **State Variable:** The state variable holds the current state value. React keeps track of this variable internally and ensures it stays consistent across re-renders.
➡️ **State Setter Function:** The setState function allows you to update the state. When you call this function with a new value, React schedules a re-render of the component, during which the state variable is updated with the new value.
➡️ **Re-rendering:** When the state is updated, React re-renders the component to reflect the new state. This means the component function is called again, but the state variable will now hold the updated value.
➡️ **Multiple State Variables:** You can use multiple useState hooks within a single component to manage different state variables independently, providing greater flexibility and readability.
➡️ **Functional Updates:** Sometimes you need to update the state based on the previous state. In such cases, you can pass a function to the setState function. This function receives the previous state and returns the new state.
By using the functional form of setState, you ensure that the state update is based on the previous state, which is particularly important when updates depend on the previous state value
➡️ **Lazy Initialization:** If the initial state is the result of an expensive computation, you can pass a function to useState. This function will be called only once to compute the initial state.
By using this approach, you ensure that the expensive computation to determine the initial state is performed only once, rather than on every re-render of the component.
👉 **Handling Objects and Arrays**
When dealing with objects or arrays, you should remember that useState does not automatically merge updates. Instead, you need to manage merging state updates manually.
_**Updating an Object**_
_**Add an Array**_
useState is a versatile and powerful hook for managing state in functional components, providing an easy-to-use API that aligns with React's declarative nature. It simplifies state management, enhances readability, and contributes to more maintainable and scalable React applications.
| pervez |
1,881,862 | How To Manage Amazon Inspector in AWS Organizations Using Terraform | Introduction Over the past two months, I have published numerous blog posts on managing... | 27,647 | 2024-06-09T07:02:52 | https://blog.avangards.io/how-to-manage-amazon-inspector-in-aws-organizations-using-terraform | aws, terraform, security | ## Introduction
Over the past two months, I have published [numerous blog posts on managing different AWS security services in AWS Organizations using Terraform](https://dev.to/acwwat/series/27647). In this blog post, I will cover one remaining AWS service, AWS Inspector, for native vulnerability management. The Terraform resources for Inspector are a bit quirky, so I will show some slightly more advanced techniques to keep the configuration neat and configurable. With that said, let's review the objective.
## About the use case
[Amazon Inspector](https://docs.aws.amazon.com/inspector/latest/user/what-is-inspector.html) is a vulnerability management service that continuously scans AWS workloads for software vulnerabilities and unintended network exposure. Supported compute services include Amazon EC2 instances, container images in Amazon ECR, and AWS Lambda functions.
Similar to other AWS security services, Inspector supports [managing multiple accounts with AWS Organizations](https://docs.aws.amazon.com/inspector/latest/user/managing-multiple-accounts.html) via the delegated administrator feature. Once an account in the organization is designated as a delegated administrator, it can manage member accounts and view aggregated findings.
Since it is increasingly common to establish an AWS landing zone using [AWS Control Tower](https://docs.aws.amazon.com/controltower/latest/userguide/what-is-control-tower.html), we will use the [standard account structure](https://docs.aws.amazon.com/controltower/latest/userguide/accounts.html) in a Control Tower landing zone to demonstrate how to configure Inspector in Terraform:
The relevant accounts for our use case in the landing zone are:
* The **Management** account for the organization where AWS Organizations is configured. For details, refer to [Managing multiple accounts in Amazon Inspector with Organizations](https://docs.aws.amazon.com/inspector/latest/user/managing-multiple-accounts.html).
* The **Audit** account where security and compliance services are typically centralized in a Control Tower landing zone.
The objective is to delegate Inspector administrative duties from the **Management** account to the **Audit** account, after which all organization configurations are managed in the **Audit** account. Let's walk through how to do this using Terraform.
## Designating an Inspector administrator account
The Inspector delegated administrator is configured in the **Management** account, so we need a provider associated with it in Terraform. To keep things simple, we will take a multi-provider approach by defining two providers, one for the **Management** account and another for the **Audit** account, using AWS CLI profiles as follows:
```terraform
provider "aws" {
alias = "management"
# Use "aws configure" to create the "management" profile with the Management account credentials
profile = "management"
}
provider "aws" {
alias = "audit"
# Use "aws configure" to create the "audit" profile with the Audit account credentials
profile = "audit"
}
```
>⚠ Since Inspector is a regional service, you must apply this Terraform configuration on each region that you are using. Consider using the **region** argument in your provider definition and a variable to make your Terraform configuration rerunnable in other regions.
We can designate the delegated administrator using the [`aws_inspector2_delegated_admin_account` resource](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/inspector2_delegated_admin_account). However, this does not enable Inspector in the delegated administrator account, so we also need to use the [`aws_inspector2_enabler` resource](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/inspector2_enabler). What I learned from testing the `aws_inspector2_enabler` resource is that you cannot provide both the delegated account and the member accounts in the `account_ids` argument, so we need a dedicated `aws_inspector2_enabler` resource for the **Audit** account. According to the resource source code, this is to address a legacy Inspector issue.
The resulting Terraform configuration should look like the following (pay special attention to the `provider` argument in each resource):
```terraform
data "aws_caller_identity" "audit" {
provider = aws.audit
}
resource "aws_inspector2_enabler" "audit" {
provider = aws.audit
account_ids = [data.aws_caller_identity.audit.account_id]
}
resource "aws_inspector2_delegated_admin_account" "audit" {
provider = aws.management
account_id = data.aws_caller_identity.audit.account_id
depends_on = [aws_inspector2_enabler.audit]
}
```
## Configuring Inspector activation for new member accounts
To allow more control over which scan types are enabled, we can define the following variables and use them with the relevant resources:
```terraform
# Variable definition (.tfvars)
variable "enable_ec2" {
description = "Whether Amazon EC2 scans should be enabled for both existing and new member accounts in the organization."
type = bool
default = true
}
variable "enable_ecr" {
description = "Whether Amazon ECR scans should be enabled for both existing and new member accounts in the organization."
type = bool
default = true
}
variable "enable_lambda" {
description = "Whether Lambda Function scans should be enabled for both existing and new member accounts in the organization."
type = bool
default = true
}
variable "enable_lambda_code" {
description = "Whether Lambda code scans should be enabled for both existing and new member accounts in the organization."
type = bool
default = true
}
```
In an organizational setup, Inspector can auto-enable on new member accounts. In Terraform, this can be configured using the [`aws_inspector2_organization_configuration` resource](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/inspector2_organization_configuration). Leveraging the variables above, the resource can be defined as follows:
```terraform
resource "aws_inspector2_organization_configuration" "this" {
provider = aws.audit
auto_enable {
ec2 = var.enable_ec2
ecr = var.enable_ecr
lambda = var.enable_lambda
lambda_code = var.enable_lambda_code && var.enable_lambda
}
depends_on = [aws_inspector2_delegated_admin_account.audit]
}
```
Note that for AWS Lambda code scanning (`lambda_code`), AWS Lambda standard scanning (`lambda`) is a prerequisite, so we need to check both variables to enable it.
Now let's address the existing member accounts.
## Activating scanning for existing member accounts
Unlike GuardDuty, the Inspector organization configuration does not support auto-enablement for existing member accounts, so we need to separately manage the member accounts. The strategy is to get the list of *active* member accounts from the organization, which we can use with the Inspector Terraform resources, including the `aws_inspector2_enabler` resource. We can exclude the **Audit** account since that is managed separately. To get the list of member accounts in the organization, we can use the [`aws_organizations_organization` data source](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/organizations_organization).
Furthermore, the `aws_inspector2_enabler` resource's `resource_types` argument takes a list of strings that represent the scan types to enable. Since the variables we defined earlier are boolean variables, we need a bit of function magic to create the list of scans to enable based on the variables.
The Terraform configuration that addresses the above requirements can be defined as follows:
```terraform
data "aws_organizations_organization" "this" {
provider = aws.management
}
locals {
enabler_resource_types = compact([
var.enable_ec2 ? "EC2" : null,
var.enable_ecr ? "ECR" : null,
var.enable_lambda ? "LAMBDA" : null,
var.enable_lambda_code && var.enable_lambda ? "LAMBDA_CODE" : null,
])
member_account_ids = [for account in data.aws_organizations_organization.this.accounts : account.id if account.status == "ACTIVE" && account.id != data.aws_caller_identity.audit.account_id]
}
```
Member accounts are not automatically associated with the delegated administrator account, so they must first be associated using the [`aws_inspector2_member_association` resource](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/inspector2_member_association).
Using the [`for_each` meta-argument](https://developer.hashicorp.com/terraform/language/meta-arguments/for_each), we can define a single resource to associate all member accounts with the previously defined `member_account_ids` local value:
```terraform
resource "aws_inspector2_member_association" "members" {
provider = aws.audit
for_each = toset(local.member_account_ids)
account_id = each.key
depends_on = [aws_inspector2_delegated_admin_account.audit]
}
```
Lastly, we can enable Inspector scans in the member accounts using the `aws_inspector2_enabler` resource. Although the `account_ids` argument can take the list of member accounts, it is more flexible to have one resource per account. Thus, using `for_each` and the local values, the resource can be defined as follows:
```terraform
resource "aws_inspector2_enabler" "members" {
provider = aws.audit
for_each = toset(local.member_account_ids)
account_ids = [each.key]
resource_types = local.enabler_resource_types
depends_on = [aws_inspector2_member_association.members]
}
```
>✅ You can find the complete Terraform in the [GitHub repository](https://github.com/acwwat/terraform-amazon-inspector-organization-example) that accompanies this blog post.
Now that the Terraform configuration is fully defined, you can apply it to establish the **Audit** account as the delegated administration and centrally manage Inspector settings for both new and existing accounts.
## Caveats about deactivating Inspector in member accounts
Among the AWS security services, Inspector has the least sophisticated API for organizational management. The mix between auto-enablement for new member accounts and explicit enablement for existing member accounts complicates how they are managed in Terraform, particularly if you are trying to disable Inspector via `terraform destroy`.
Consider the case where a new member account is added and auto-enablement is applied to this account. If you run `terraform destroy` as-is, Terraform is not aware of the new member account, and thus Inspector cannot be deactivated in this account. You must manually deactivate the account in each applied region.
Alternatively, you can first run `terraform apply` so that the `aws_inspector2_member_association` and `aws_inspector2_enabler` resource instances are created, then run `terraform destroy` to properly clean up. While this method works, you must keep track of when new member accounts are added so that you know when to run `terraform apply` to reconcile the Terraform resources with the updated organization.
In any case, be aware of this caveat and take one of the two approaches if you ever need to clean up Inspector resources.
## Summary
In this blog post, you learned how to manage Amazon Inspector in AWS Organizations using Terraform. With a delegated administrator, Inspector can be auto-enabled for new member accounts, while existing member accounts are dynamically associated and configured with the desired scan types. If you have also [configured AWS Security Hub to operate at the organization level](https://dev.to/aws-builders/how-to-manage-aws-security-hub-in-aws-organizations-using-terraform-5gl4), you can manage Inspector findings across accounts and regions, thereby streamlining your security operations.
If you are interested in this type of content, be sure to read other posts on the [Avangards Blog](https://blog.avangards.io), where I share tips and deep dives on AWS, Terraform, and beyond. Thank you, and enjoy the rest of your day! | acwwat |
1,881,864 | Glam up my markup: beaches | This is a submission for Frontend Challenge v24.04.17, Glam Up My Markup: Beaches What I... | 0 | 2024-06-09T07:01:34 | https://dev.to/filoxo/glam-up-my-markup-beaches-1e56 | devchallenge, frontendchallenge, css, javascript | _This is a submission for [Frontend Challenge v24.04.17](https://dev.to/challenges/frontend-2024-05-29), Glam Up My Markup: Beaches_
## What I Built
i set out to build a page that felt worth sharing with a friend, neighbor, or even stranger! imagining the beach always evokes a sense of happiness and freedom for me, and i really enjoyed what i was able to build!
(shameless plug!)
this month’s theme is also serendipitously aligned with [Travelpass Guides](https://www.travelpass.com/guides/all), a new product feature my team and i’ve been passionately exploring and developing, making this Challenge entry a natural extension to explore some creative experiences on web!
## Demo
[Online demo](https://glam-up-my-markup-11ty.pages.dev/)
[glam-up-my-markup repo on GitHub](https://github.com/filoxo/glam-up-my-markup-11ty/tree/attempt-1)
## Journey
i found that i starting having fun once i got to work on some features that i'd never implemented before. a few highlights stand out:
- technical : i started with what i thought was going to be the hardest feature - the animated background. the subtle changing colors remind me of how waves come and go out of view. the pattern comes from https://heropatterns.com/ (CC BY 4.0). i thought i would need js for this, but using an external svg file + embedded style sheet is all this is.
- technical : i sourced most images from [Wikimedia Commons](https://commons.wikimedia.org/wiki/Main_Page) so as to avoid licensing issues.
- creative : i also enjoyed the extra challenge of not modifying the html at all. i created a class-less theme by composing unocss/tailwind classes together into a html-only selectors. pretty powerful!
- creative : the hover effect had a couple of iterations to figure out. i had considered hue-shifting, desaturation and blurring/glassmorphism but ultimately a simple color gradient gave me a better way to have the text over the photo. its still very imperfect though and i suspect would not pass WCAG rigor.
- creative : the border is a little reminiscent of a postcard or polariod frame
- other: the script font is called [seaweed script](https://fonts.google.com/specimen/Seaweed+Script?query=script) :rofl:
- accessibility : if you're sensitive to motion, then enabling your browsers "prefers reduced motion" will make the cards taller, preventing as much of the bg image from growing!
- todo : because the html uses non-interactive elements, i was puzzling how i could make for a more interesting mobile experience where hovering. i think it would be cool to setup an intersectionobserver that would expand the card when its title is visible. perhaps a exercise for the reader!
| filoxo |
1,881,863 | How-to make SSL (IONOS cert) Web redirect own apache server | Hi, I come to you as I don't know what to do more to make SSL working on my domain handle by IONOS... | 0 | 2024-06-09T07:00:48 | https://dev.to/philaupatte/how-to-make-ssl-ionos-cert-web-redirect-own-apache-server-8k1 | help | Hi,
I come to you as I don't know what to do more to make SSL working on my domain handle by IONOS with redirection. (IONOS don't support customer running their own server)
**On IONOS :**
- I have a domain *.philaupatte.com
- I have SSL certificate (cer, key and intermediate)
- I have a redirection to the box of my ISP https://82.67.90.232:34443
**On ISP Box :**
- I have port forwarding from any IP source port:3480 to my apache server port:80
- I have port forwarding from any IP source port:34443 to my apache server port:443
**On my APACHE2 server :**
I have virtual host definition (quite simple)
<VirtualHost *:443>
ServerAdmin webmaster.administrator@free.fr
ServerName philaupatte.com
DocumentRoot /var/www/philaupatte.com
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
LogLevel debug
SSLEngine on
SSLUseStapling off
<FilesMatch "\.(?:cgi|shtml|phtml|php)$">
SSLOptions +StdEnvVars
</FilesMatch>
<Directory /usr/lib/cgi-bin>
SSLOptions +StdEnvVars
</Directory>
SSLCertificateFile /etc/ssl/philaupatte.com/philaupatte.com_ssl_certificate.cer
SSLCertificateKeyFile /etc/ssl/philaupatte.com/_.philaupatte.com_private_key.key
SSLCertificateChainFile /etc/ssl/philaupatte.com/_.philaupatte.com_ssl_certificate_INTERMEDIATE.cer
</VirtualHost>
All config is OK and server is starting without any error.
curl -i4 http://philaupatte.com working fine
HTTP/1.1 302 Found
Content-Type: text/html
Content-Length: 0
Connection: keep-alive
Keep-Alive: timeout=15
Date: Sun, 09 Jun 2024 06:57:29 GMT
Server: Apache
Cache-Control: no-cache
Location: https://82.67.90.232:34443
curl -i4 https://philaupatte.com fails
curl: (35) OpenSSL/3.0.11: error:0A000438:SSL routines::tlsv1 alert internal error
curl -i4 https://philaupatte.com fails -vvv
* Trying 217.160.0.238:443...
* Connected to www.philaupatte.com (217.160.0.238) port 443 (#0)
* ALPN: offers h2,http/1.1
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* CAfile: /etc/ssl/certs/ca-certificates.crt
* CApath: /etc/ssl/certs
* TLSv1.3 (IN), TLS alert, internal error (592):
* OpenSSL/3.0.11: error:0A000438:SSL routines::tlsv1 alert internal error
* Closing connection 0
curl: (35) OpenSSL/3.0.11: error:0A000438:SSL routines::tlsv1 alert internal error
Any suggestion will be more than welcome, I am fully stuck.
Thanks
| philaupatte |
1,881,860 | How to Use a Sentence Rephraser to Avoid Plagiarism? A Complete Guide | Crafting unique, plagiarism-free content can feel like a never-ending battle. Staring at a screen,... | 0 | 2024-06-09T06:55:14 | https://dev.to/ray_parker01/how-to-use-a-sentence-rephraser-to-avoid-plagiarism-a-complete-guide-3n35 | ---
title: How to Use a Sentence Rephraser to Avoid Plagiarism? A Complete Guide
published: true
---
Crafting unique, plagiarism-free content can feel like a never-ending battle. Staring at a screen, searching for fresh ways to say things without copying, is a struggle many writers face.
But fear not! <a href="https://sentencerephraser.com/">Sentencerephraser.com</a> is here to be your secret weapon. This innovative tool goes beyond a simple thesaurus, offering a comprehensive solution to elevate your writing.
It empowers you to effortlessly rephrase sentences, ensuring originality while safeguarding against plagiarism.
Sentencerephraser.com becomes your partner in achieving clear, plagiarism-free, and truly original writing, no matter the content you create.
<h3>Understanding Sentence Rephraser</h3>
Ever felt like a broken record, repeating the same words in your writing? Sentence rephrasing is here to break that cycle and unlock your inner wordsmith. But what exactly is it, and how does it differ from plagiarism?
In simple terms, Sentence Rephraser involves rewriting a sentence to convey the same meaning but using different words and potentially restructuring the sentence itself.
It's like putting a fresh coat of paint on your ideas, making them shine with originality. Here's the key distinction: rephrasing demonstrates your understanding of the concept and your ability to express it in your own voice, while plagiarism simply copies someone else's words.
<h3>Unleashing Sentencerephraser.com's Power</h3>
Now that you understand the magic of sentence rephrasing, let's dive into how to leverage Sentencerephraser.com for maximum impact.
There are various types of sentence rephrasing tools available, including online platforms like Sentencerephraser.com, software programs, and even browser extensions. When choosing your rephrasing companion, focus on features that best suit your needs. Look for tools that offer:
<b>A wealth of synonym suggestions</b>
Expand your vocabulary and discover fresh alternatives for overused words.
<b>Sentence structure variations</b>
Break free from monotonous sentence patterns by exploring different ways to structure your ideas.
<b>A user-friendly interface</b>
Sentencerephraser.com should be intuitive and easy to navigate, allowing you to focus on crafting compelling content.
Here's a step-by-step guide to utilising Sentencerephraser.com effectively:
<b>Input your sentence</b>
Simply copy and paste the sentence you want to rephrase.
<b>Explore the options </b>
Sentencerephraser.com will analyse your sentence and suggest synonyms, alternative phrasings, and potentially different sentence structures.
<b>Choose wisely </b>
Don't just pick the first suggestion! Analyse the options and select the one that best reflects your voice and conveys the intended meaning most accurately.
<b>Edit and refine </b>
Remember, Sentencerephraser.com is a tool, not a magic solution. Always edit the rephrase sentence to ensure it flows naturally and maintains your unique writing style.
<h3>Rephrasing vs. Summarising</h3>
Both rephrasing and summarising involve working with existing text, but they serve distinct purposes:
<b>Rephrasing</b>
Focuses on individual sentences or short passages. Its goal is to rewrite the text in your own words while maintaining the exact meaning. Think of it as giving the same idea a new outfit - different wording, but the same core message.
<b>Summarising</b>
Deals with larger chunks of text, aiming to condense the main points and essential information into a shorter version. It's like creating a cliff-notes version of the original text, capturing the gist without all the details.
Here's an analogy to solidify the difference: Imagine a detailed recipe for a cake.
<b>Rephrasing:</b>
It would be rewriting the instructions for making the cake using different words, but ensuring you still follow the same steps and end up with the same delicious cake.
<b>Summarising:</b>
It would be creating a short list of the key ingredients and basic steps involved in baking the cake, without going into all the specifics.
<h3>Originality Takes Flight: Beyond the Rephrase</h3>
While Sentencerephraser.com is a powerful tool for rephrasing, true originality goes beyond just finding synonyms. Here are some additional strategies to take your writing to the next level:
<b>Deep Dive into Source Material</b>
Don't just skim the surface! When referencing sources, delve deeper to grasp the nuances of the information. This fosters a richer understanding that will naturally translate into your writing with fresh insights and unique perspectives.
<b>Craft Your Own Analysis</b>
Engaging in critical thinking allows you to go beyond the source material and add your own voice to the conversation.
<b>Cite Smart, Avoid Trouble</b>
Sentencerephraser.com can be a helpful companion in this process, but remember to understand the content you're referencing and cite your sources accurately.
<b>Proofread & Edit for Perfection</b>
Take the time to proofread and edit your work for clarity, coherence, and overall flow. This ensures your original ideas shine through without any grammatical or structural hiccups.
<h3>Conclusion</h3>
Crafting plagiarism-free, original content can feel like a challenge. But fear not! Sentencerephraser.com is your secret weapon in the fight for originality.
This innovative tool empowers you to rephrase sentences, ensuring your writing is fresh and plagiarism-proof.
However, true originality goes beyond synonyms. Remember to delve deep into the source material, develop your own analysis, and cite smartly.
tags:
# Avoid Plagiarism
# Sentence Rephraser
---
| ray_parker01 | |
1,881,859 | I created my own search engine | I have created my own search engine and I'll tell you how it works. First of all, I created my own... | 0 | 2024-06-09T06:42:44 | https://dev.to/schbenedikt/i-created-my-own-search-engine-go4 | bootstrap, python, webdev, programming |
I have created my own search engine and I'll tell you how it works.
First of all, I created my own web crawler. It runs on Python and stores various meta data in a mysql database.
{% embed https://github.com/SchBenedikt/web-crawler %}
The search engine, which I created with Bootstrap, then retrieves the results from mySQL. The bottom right always shows how long the query took.
{% embed https://github.com/SchBenedikt/search-engine %}
Please note that no robots.txt files are currently taken into account, which is why you cannot simply crawl every page.
What do you think of the project?
Feel free to write it in the comments!
| schbenedikt |
1,881,858 | ilogo.fun - Free Download Vector Svg Logo Icon | WE HAVE MILLIONS OF SVG FILES: LOGO ICON ILLUSTRATIONS ALL SVG IS DOWNLOADED FOR... | 0 | 2024-06-09T06:37:28 | https://dev.to/ilogofun/ilogofun-free-download-vector-svg-logo-icon-21o | svg, logo, icon | WE HAVE MILLIONS OF SVG FILES: LOGO ICON ILLUSTRATIONS
ALL SVG IS DOWNLOADED FOR FREE
https://ilogo.fun/
 | ilogofun |
1,881,857 | laravel-nuxt-template | This repository provides a starter template for building web applications using Laravel as the... | 0 | 2024-06-09T06:33:40 | https://dev.to/akramghaleb/laravel-nuxt-template-1c6j | This repository provides a starter template for building web applications using Laravel as the backend and Nuxt.js as the frontend framework.
## This project built with Laravel 11 + Nuxt 3 <br>
- This template build with Laravel v11.0 & Nuxt v3.11
- This template Support Pinia State Management
- If you like this work you can <a href="https://github.com/akramghaleb">see more here</a>
## Features
1. **Technology Stack:** This release leverages **Laravel version 11.0** for the backend framework and **Nuxt version 3.11** for the frontend framework. Laravel provides a robust foundation for developing web applications with its elegant syntax and powerful features, while Nuxt.js enhances the development experience by offering a framework for building server-side rendered Vue.js applications with features like automatic code splitting, hot module replacement, and more.
2. **State Management:** The release incorporates **Pinia version 2.1** for state management. Pinia is a modern and lightweight state management solution for Vue.js applications. It provides a simple and intuitive API for managing application state, making it easier to organize and manage complex data in Vue.js applications. With Pinia v2.1, developers can take advantage of improved features and optimizations for state management in their applications.
3. **Persisted State:** The release introduces support for persisted state, allowing for the storage of application state data in the local storage of the user's browser. This feature ensures that user data persists even after the browser is closed or refreshed, enhancing the user experience by providing continuity and preserving important application data. By leveraging local storage, developers can create more resilient and user-friendly applications that remember user preferences and maintain session state across sessions.
## Installation
Clone the repository
```
git clone https://github.com/akramghaleb/laravel-nuxt-template.git
```
Switch to the repo folder
```
cd laravel-nuxt-template
```
switch to frontend folder (nuxt app)
```
cd frontend
cp .env.example .env
```
Make sure to install the dependencies:
```bash
# npm
npm install
# pnpm
pnpm install
# yarn
yarn install
# bun
bun install
```
Build your code:
```bash
# npm
npm run generate
# pnpm
pnpm run generate
# yarn
yarn generate
# bun
bun run generate
```
switch to backend folder (laravel app)
```
cd ../backend
```
Install all the dependencies using composer
```
composer install
```
Copy the example env file and make the required configuration changes in the .env file
```
cp .env.example .env
```
Generate a new application key
```
php artisan key:generate
```
Run the database migrations (**Set the database connection in .env before migrating**)
```
php artisan migrate
```
Start the local development server
```
php artisan serve
```
You can now access the server at http://localhost:8000
<br>
---
[Github Repo](https://github.com/akramghaleb/laravel-nuxt-template)
Thanks,
If you enjoy my work, consider buying me a coffee to keep the creativity flowing!
<a href="https://www.buymeacoffee.com/akramghaleb" target="_blank"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-red.png" alt="Buy Me A Coffee" width="150" ></a>
<br><br>
| akramghaleb |
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