teleren/devto huggingface dataset:
Flatiron - Phase 4
Tags: fullstack, beginners, flask, react
Published: 2023-10-20 22:28:34

In the fourth phase of the Flatiron course, the focus shifted to backend web development, marking a crucial step toward becoming a full-stack engineer. This phase was undoubtedly one of the most important, delving deep into creating APIs, deployment, and integrating frontend and backend components for comprehensive projects. With three phases behind me, I felt well-prepared to tackle this challenging segment.

We kicked off this phase by diving into Flask and SQLAlchemy with greater depth than before, laying a solid foundation for understanding backend technologies. The curriculum then progressed to APIs, emphasizing retrieval and construction, followed by the integration of backend and frontend knowledge in a full-stack project. Despite the intensity of this three-week phase, my comfort level with the course's pace allowed me to navigate the material without excessive stress.

This final project, a collaborative effort with a partner, marked the culmination of our learning journey. Despite the rush to develop a complete application in just one week, my partner and I, both seasoned in the course, adeptly handled challenges along the way. Personally, I took on the task of validation, an area where I felt a bit rusty. Ensuring that backend validation seamlessly aligns with frontend validation proved to be a significant challenge. However, utilizing available resources and my determination, I successfully tackled this hurdle.

One of the most significant challenges I encountered revolved around validating formats, especially for inputs like dates and phone numbers. Proper formatting is crucial, and I dedicated a substantial amount of time to master this aspect. I delved into understanding Flask's formatting conventions, such as using regular expressions like r'^\d{3}-\d{3}-\d{4}$' to validate phone numbers in the XXX-XXX-XXXX format. Though challenging, mastering backend validations was a valuable learning experience that will undoubtedly benefit me in the upcoming final project.

In summary, Phase 4 was a content-packed journey that deepened my understanding of backend web applications. Despite its intensity, my progress in the course allowed me to keep pace and absorb valuable knowledge. As I transition to Phase 5, I am thrilled to have reached the stage where I consider myself a full-stack developer. The next phase will be a chance for me to prove my skills with a substantial solo project, and I am excited to embrace this challenge.
DeftGPT- Al Chat GPT Writing Companion
Published: 2023-10-20 21:57:53

Meet the DeftGPT software!
DeftGPT is the advanced and upgraded version of ChatGPT providing you with instant access to information right on your browser. Use it for free for up to 10 inquiries, for additional inquiries you can always upgrade. Also, it can be used worldwide.

For inquiries and further information please visit the website https://deftgpt.com/
Day 837 : Travellin' Man
Tags: hiphop, code, coding, lifelongdev
Published: 2023-10-20 21:54:52

_liner notes_:
- Professional : Focused on finishing up some tasks before my overseas trip. Sometimes trying to get documentation work while working conferences and holding talks and workshops can be a lot. Some of the stuff I linked to in my docs aren't ready yet, but that's on someone else. haha.

- Personal : Last night, I went through A LOT of tracks to prep for future radio shows. I just need to put them in playlists and write them up in the docs. I figure I can look up the artists' social media accounts while waiting for flights. I may pay for WiFi on the plane. It's not great, but I should be able to do some prep work for the radio show.

![Queensland, Australia landscape with green lawn, a forest and some mountain peaks going into the distance under a setting sun sky. ](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/67pkud1t6fhy8dj4whfx.jpg)

Been ironing clothes to take on my trip. Still waiting on my suitcase that's supposed to come tomorrow. I packed 3 days worth of clothes into my backpack. It actually fit with some space left. Without the winter clothes, I would have even more space. I have another strap and I think I can compress it even more. After ironing, I'll work on the upcoming episodes of the radio show. Maybe I'll start work on my upcoming talks and get a jump start on that. We'll see. So, since I'll be travelling, I won't be updating this blog or doing the https://untilit.works study sessions, but I will be posting pictures and videos on my travel site: https://dwane.in and doing the radio show https://kNOwBETTERHIPHOP.com Life of a travellin' man.

Have a great night and weekend! Be back in about 4 weeks!!

peace piece
Dwane / conshus
https://dwane.io / https://HIPHOPandCODE.com
{% youtube p2YUDZZV6H8 %}
Optimize Your React Code: Avoid Unnecessary useState Hooks
Tags: react, beginners, programming
Published: 2023-10-20 21:24:04

Hey Dev Community,

🚀 Let's talk about optimizing your React code by avoiding unnecessary useState hooks. Often, we find ourselves using multiple useState hooks when we can make our code cleaner and more efficient.

Consider this example:

```
import React, { useState } from 'react';

function Counter() {
  const [count, setCount] = useState(0);
  const [doubleCount, setDoubleCount] = useState(0);

  const handleIncrement = () => {
    setCount(count + 1);
  }

  // Unnecessary useState
  const handleDouble = () => {
    setDoubleCount(count * 2);
  }

  return (
    <div>
      <p>Count: {count}</p>
      <p>Double Count: {doubleCount}</p>
      <button onClick={handleIncrement}>Increment</button>
      <button onClick={handleDouble}>Double</button>
    </div>
  );
}

export default Counter;

```

In this example, we have two useState hooks. The second one, doubleCount, is dependent on the count value, but we don't need a separate useState hook for it. Instead, we can calculate it on-demand to make our code cleaner and more efficient.

Here's the optimized code:

```
import React, { useState } from 'react';

function Counter() {
  const [count, setCount] = useState(0);

  const handleIncrement = () => {
    setCount(count + 1);
  }

  // Calculate doubleCount on-demand
  const doubleCount = count * 2;

  return (
    <div>
      <p>Count: {count}</p>
      <p>Double Count: {doubleCount}</p>
      <button onClick={handleIncrement}>Increment</button>
    </div>
  );
}

export default Counter;

```

By eliminating the unnecessary useState hook for doubleCount, we've made our code more efficient and easier to understand.

Remember, always strive to write clean and optimized code in React!
Whitebox testing React & Angular contrasting key features
Published: 2023-10-20 21:03:55

I am not sure if this is the right place to put this, so apologies if I am wrong, but I am currently starting a master's thesis whitebox testing Reacts & Angulars contrasting key features(data binding (1/2 ways), VDOM vs Incremental, Dynamic vs static type, memory usage). From what I have found in papers, articles and talking to people, the best way of tackling is using chrome devtools and googles Lighthouse tools. Any idea if this is true? If it is, which parts of devtools/lighthouse would you use? Or is there is other (better) ways of tackling this?
Consultation from Django experts
Tags: python, docker, django, programming
Published: 2023-10-20 20:54:51

Hello, I am a web developer and I have +5 years of experience and I want to start my own project, which is a project web application, an application that is classified as a large-scale application, My question is: What is the best software structure or architecture that I should use or start with?
The project is an enterprise SaaS Django web application, and it has a mobile application, I will use docker to containerize every service.
I have read about Monolith, SOA, Microservices, and Serverless, for my opinion, Microservices is the good one, but I have found some issues like I want to share some codes and apps between multiple services, the shared code is necessary to be shared to avoid duplicate or repeated code, according to my experience I did work in advanced structure or architecture in multiple project and companies, but I would like advice from experts and please, preferably provide details about your opinion.


Thanks :)
Hacktoberfest 2023: Completing Four PRs and Embracing Open Source Excellence!
Tags: hack23contributor
Published: 2023-10-20 19:47:38

Hey Dev Community! 👋

I am thrilled to announce that I have successfully completed all four pull requests for Hacktoberfest 2023! 🚀 It's been an enriching experience contributing to open source projects and collaborating with developers from all around the world.

Throughout this Hacktoberfest journey, I've delved into diverse projects, honed my coding skills, and learned valuable lessons about teamwork and collaboration. The support from the open source community has been phenomenal, and I am incredibly grateful for the opportunity to make a positive impact.

A huge shoutout to the maintainers and contributors of the projects I worked on. Your guidance and encouragement have been invaluable.

I am proud to be a part of this vibrant developer community, and I look forward to more collaborative adventures in the world of open source. Here's to the spirit of sharing, learning, and building together! 🌟

Thank you, Hacktoberfest, for this fantastic opportunity, and thank you, Dev community, for your constant inspiration and support. Let's keep coding and creating a better, open-source-powered future! 💻✨

#Hacktoberfest #OpenSource #DevCommunity #CodingJourney #OpenSourceCollaboration
Generate Types for Contentful
Tags: contentful, typescript, cms
Published: 2023-10-20 20:24:35

Manually adding types for Contentful is a cumbersome experience especially when the content models within Contentful itself can be updated. To ensure you have the latest types from Contentful in your application there are a few scripts we can run.

#### Install the Contentful CLI globally
```bash
yarn global add contentful-cli
```

#### Login to Contentful
```bash
contentful login
```

#### Install cf-content-types-generator
```bash
yarn add cf-content-types-generator --dev
```

#### Update package.json
```json
{
  "scripts": {
    "contentful:export": "contentful space export --export-dir contentful --content-file export.json --space-id XXX",
    "contentful:typegen": "cf-content-types-generator contentful/export.json --v10 --out types/contentful"
  }
}
```

#### Export Contentful Space
```bash
yarn contentful:export
```

#### Generate the Contentful types
```bash
yarn contentful:typegen
```

#### Summary
Within the directory `types/contentful` you'll see files of generated types from Contentful that you can now use in your Typescript project.

#### Other Projects
[contentful-typescript-codegen](https://github.com/intercom/contentful-typescript-codegen)
[contentful-ts-type-generator](https://github.com/arimkevi/contentful-ts-type-generator)
[contentful-ts-generator](https://github.com/watermarkchurch/contentful-ts-generator)
[TS Content Types Generator App](https://github.com/marcolink/cf-content-types-generator-app)
TOP 10 AI Research Tools in the Market in 2023
Tags: ai, tooling, webdev
Published: 2023-10-20 19:09:05

**Explore thr TOP 10 [AI Research Tools](https://xn--ainexu-1jb.com/en/ai-research-tools/)in the Market in 2023**

[](https://youtube.com/playlist?list=PLb1JcSfysAV6-lumK87rupcF_xqnnajDn&si=YWtEkCZYliCYBefe)
1. The tools capabilities
2. AI Research Tools Pros and Cons
3. Comparation between tools
Secrets and configuration management made easy
Tags: infrastructureascode, webdev, cloud, architecture
Published: 2023-10-20 19:06:28

Pulumi ESC is a new product from Pulumi that manages and tames secrets and configuration complexity across all of your cloud infrastructure and application environments. Pulumi ESC introduces a new category of configuration-as-code product, motivated by our experience working with hundreds of Pulumi IaC customers to address their needs in managing secrets and configuration at scale within their Pulumi infrastructure and across other cloud applications and infrastructure projects.


![How ESC Works](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/7g3j76mz1fu13lk9vk6s.png)

Read more:  https://www.pulumi.com/blog/environments-secrets-configurations-management/
Predicting Country Population Using Linear Regression with Java and Apache Commons
Published: 2023-10-20 19:03:09

Linear regression analysis is a statistical process used to predict the value of a variable based on the values of other variables. We refer to the variable we want to predict as the dependent variable and the variables used for the prediction as the independent variables.

For our demonstration we are going to use the mexico population history to train our model.


```java
public class MexicoPopulationLineChart {

    private final double[][] mexicoPopulation = new double[][]{
            {1955, 31452141},
            {1960, 36268055},
            {1965, 42737991},
            {1970, 50289306},
            {1975, 58691882},
            {1980, 67705186},
            {1985, 74872006},
            {1990, 81720428},
            {1995, 89969572},
            {2000, 97873442},
            {2005, 105442402},
            {2010, 112532401},
            {2015, 120149897},
            {2020, 125998302},
    };
}

```
We visualize the data using a line chart ending with this result.


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/lkz4bv92b46yim1guvvj.png)



Now, we will attempt to predict the population for the next decades to see what we can obtain. For this we are going to use `SimpleRegression` class from Apache Commons Math.


```java
SimpleRegression regression = new SimpleRegression();
regression.addData(mexicoPopulation);

NumberFormat formatter = NumberFormat.getNumberInstance();
formatter.setMaximumFractionDigits(0);

for(var i = 2025; i < 2050; i = i + 5) {
    System.out.println(i + " - " + 
    formatter.format(regression.predict(i)));
}
```
giving us this output

```bash
1955 - 29,184,914
1960 - 36,735,619
1965 - 44,286,325
1970 - 51,837,031
1975 - 59,387,737
1980 - 66,938,442
1985 - 74,489,148
1990 - 82,039,854
1995 - 89,590,559
2000 - 97,141,265
2005 - 104,691,971
2010 - 112,242,676
2015 - 119,793,382
2020 - 127,344,088
2025 - 134,894,794
2030 - 142,445,499
2035 - 149,996,205
2040 - 157,546,911
2045 - 165,097,616
2050 - 172,648,322
```

Finally, let's incorporate the predictions into our chart so that we can visually represent the data.



![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/37mf6u444ulb64e5bal7.png)
Learn DSA with Me ( Day 1 )
Tags: algorithms, c, cpp, datastructures
Published: 2023-10-20 19:02:42

## Time Complexity (Big O)
### Today I will be beginning a series of posts called "Learn DSA with Me". This will follow my journey into data structures and algorithms. I will be writing what I learn everyday on this post in a summarized form.

Today I learnt the first and most basic concept in DS & A, understanding time complexity.
***Time complexity is how long it takes for an algorithm to execute, and it's based on the size of the input.***
Time complexity is expressed in what's called Big O notation.
Let me give you some examples:

Example 1 - Time Complexity O(1)
```cpp
int main(){
    //Time complexity of O(1) since it will be called 1 time.
    cout >> "Hello World" >> endl;
}
```
Example 2 - Time Complexity O(n)
```cpp
int main(){
    int n;
    cin >> n;
    //Time complexity of O(n) since it will be called n times.
    for(int i = 0; i<n; i++){
        cout >> "Hello World" >> endl;
    }
}
```
Example 3 - Time Complexity O(n<sup>2</sup>)
```cpp
int main(){
    int n;
    cin >> n;
    //Time complexity of O(n²) since it will be called n² times.
    for(int i = 0; i<n; i++){
        for(int j = 0; j<n; j++){
            cout >> "Hello World" >> endl;
        }
    }
}

```

###How To Analyze Time Complexity
Now I am going to teach you how to analyse these time complexities. So here we go!.

```cpp
int main(){
    int n;
    cin >> n;
    //Time complexity of O(n²) since it will be called n² times.
    for(int i = 0; i<n; i++){
        for(int j = 0; j<n; j++){
            cout >> "Hello World" >> endl;
        }
    }
}
```
Looking at the third example again, looking at the program we can deduce how many times each statement is going to be executed.

```cpp
int main(){
    int n; -------------------------------- 1 times
    cin >> n; ----------------------------- 1 times
    
    for(int i = 0; i<n; i++){
        Statements... --------------------- n times
        for(int j = 0; j<n; j++){
            cout >> "Hello World" >> endl;- n² times
        }
    }
}
```
Adding them all up we get a polynomial f(n) = 1+1+n+n² = 2+n+n². The degree of f(n) determines the time complexity. The degree is the highest power of n in f(n). So, in f(n), the highest power is n², therefore the time complexity is O(n²).

### Hoping everyone enjoyed the article, the next one will be published in 2-3 days, so lookout for that. Till then, bye!
Building Scalable and Robust Applications with Framework/Tool
Published: 2023-10-20 19:01:36

Title: Building Scalable and Robust Applications with [Framework/Tool]

Introduction:

In today's fast-paced world,[ businesses need applications ](https://www.bigentities.com/web-site-development.html)that can scale quickly and reliably to meet the demands of growing user bases and changing business needs. [Framework/Tool] is a powerful framework/tool that can help you build scalable and robust applications that can withstand even the most demanding workloads.

Body:

[Framework/Tool] offers a number of features that make it ideal for building scalable and robust applications, including:

Performance: [Framework/Tool] is designed to be performant, even under heavy load. It uses a variety of techniques to optimize performance, such as caching, asynchronous processing, and load balancing.
Scalability: [Framework/Tool] is highly scalable, both horizontally and vertically. Horizontal scaling allows you to add more servers to your application to handle increased traffic. Vertical scaling allows you to upgrade the hardware of your existing servers to improve performance.
Reliability: [Framework/Tool] is designed to be reliable and fault-tolerant. It includes features such as error handling, retry logic, and failover mechanisms to ensure that your application remains available even in the event of a failure.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/jg95kn5kmxkh1ltapz1h.jpg)
Benefits:

Building your application with [Framework/Tool] can offer a number of benefits, including:

Improved performance: [Framework/Tool] can help you improve the performance of your application, even under heavy load. This can lead to improved user satisfaction and increased revenue.
Reduced costs: [Framework/Tool] can help you reduce the costs associated with running your [application](https://www.bigentities.com/web-site-development.html). By making your application more scalable and reliable, you can reduce the number of servers you need and the amount of downtime you experience.
Increased agility: [Framework/Tool] can help you increase the agility of your business. By making it easier to scale your [application ](https://www.bigentities.com/web-site-development.html)up and down, you can quickly respond to changes in demand and new opportunities.
Conclusion:

If you are looking for a way to build scalable and robust applications, [Framework/Tool] is a great option. It offers a number of features and benefits that can help you improve the performance, reliability, and agility of your business.
Hacktoberfest 23 Contributor
Tags: hack23contributor, hacktoberfest23
Published: 2023-10-20 18:59:32

### Intro
So as most of my previous participations, I focused mostly on documentation. 

Why? It gives me the opportunity to find more about projects that are new to me, by forcing me to read documentation and make an effort to try and improve.

### Highs and Lows
The highs are clearly been able to make some cool contributions here and there, learning more about open-source projects and been able to complete the goals I had set.

The lows are mostly non-existing, but if I would have to say is that sometimes it is really difficult to contribute.

### Growth
Overall, it was a good experience to learn more about open-source projects and help in any way I could.

You can see some of my contributions here:

https://github.com/github/docs/pull/29319
https://github.com/Codecademy/docs/pull/3610
https://github.com/github/docs/pull/28936
https://github.com/github/docs/pull/28910
https://github.com/github/docs/pull/28755
Node.js Event Loop: A Deep Dive
Tags: node, javascript, webdev, programming
Published: 2023-10-20 18:57:46


Node.js is celebrated for its non-blocking, asynchronous architecture, and at the heart of this magic is the **Event Loop**. In this blog, we'll explore how the Event Loop works and why it's integral to Node.js's performance.

## Table of Contents
- [What is the Event Loop?](#what-is-the-event-loop)
- [Phases of the Event Loop](#phases-of-the-event-loop)
- [Why It Matters](#why-it-matters)
- [Common Misconceptions](#common-misconceptions)
- [Best Practices](#best-practices)
- [Conclusion](#conclusion)

## What is the Event Loop?

The Event Loop is the mechanism that allows Node.js to perform non-blocking I/O operations, despite the fact that JavaScript is single-threaded. By offloading operations to the system kernel whenever possible, it ensures the efficiency of our applications.

```javascript
fs.readFile('/file.txt', (err, data) => {
    if (err) throw err;
    console.log(data);
});

console.log('Reading file...');
```

In Node.js, the system doesn't wait for file reading to complete. Instead, it continues with the next operation (`console.log('Reading file...')`), and processes the callback once the reading is done.

## Phases of the Event Loop

The Event Loop in Node.js goes beyond just a simple loop. It encompasses various phases:

- **Timers Phase**: Handles callbacks from `setTimeout` and `setInterval`.
  
- **Pending Callbacks Phase**: Executes I/O callbacks deferred from the last cycle.
  
- **Idle, Prepare Phase**: This phase is only for internal use.
  
- **Poll Phase**: Fetches new I/O events and runs their callbacks.
  
- **Check Phase**: Processes callbacks from `setImmediate()`.
  
- **Close Callbacks Phase**: Manages close events like `socket.on('close', ...)`.

## Why It Matters

Understanding the Event Loop is crucial:

1. **Performance Optimization**: It aids in maximizing the efficiency of your application.
  
2. **Debugging**: Assists in debugging asynchronous operations.
  
3. **Insights**: Gives a deeper understanding of the inner workings of Node.js.

## Common Misconceptions

- **Node.js is Multithreaded**: Though Node.js can utilize threads via the `worker_threads` module, the primary code execution remains single-threaded.
  
- **Priority of `setImmediate()` vs `setTimeout()`**: Their priority relies on the event loop phase they are invoked from.

## Best Practices

- **Avoid Blocking the Event Loop**: Intense CPU operations can hinder the event loop. It's advisable to shift them to worker threads or utilize a job queue.
  
- **Use Async/Await**: Employing async/await can simplify the structure of modern asynchronous operations.
  
- **Monitor the Event Loop**: Tools such as [node-clinic](https://github.com/clinicjs/node-clinic) are invaluable for overseeing your event loop's health.

## Conclusion

The Event Loop is Node.js's secret ingredient enabling its non-blocking behavior. Grasping its mechanics not only elevates your skills as a developer but also empowers you to develop effective and scalable solutions.

**Happy coding!**