teleren/devto huggingface dataset:
Illustrated JavaScript Coding Course
Tags: javascript, codenewbie, beginners, ebook
Published: 2024-02-14 23:46:54

Dear code newbies,

I've put together a comprehensive JavaScript coding course presented in the format of an engaging slideshow-style ebook. This ebook is packed with valuable content, spanning over 700 slides to aid in your learning journey.

The course is not for everyone, but you may be interested in it if you're passionate about creative coding and game development.

**Download the first 200 slides**

[https://codeguppy.com/site/download/coding_course.pdf](https://codeguppy.com/site/download/coding_course.pdf)

**Purchase the full e-book**

[https://codeguppy.gumroad.com/l/js/Launch](https://codeguppy.gumroad.com/l/js/Launch)

If you found the sample PDF helpful and informative, don't miss out on the chance to delve deeper into the course content.

For a limited time, seize the opportunity to acquire the full ebook at a discounted rate of $17.50 – that's 50% off the regular price.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/x0qa937t4qzv5gawfh24.png)
Unlocking the Power of Chat GPT: A Developer's Guide to Streamlining Workflows and Boosting Productivity
Tags: ai, chatgpt, githubcopilot, webdev
Published: 2024-02-14 23:05:32

Hi all! We recently had software engineer James Feore give a talk on how he has improved his processes through AI, ChatGPT and Co-Pilot. 

{% embed https://youtu.be/S6QqOBCEvoQ %}.

**Below you'll find a brief re-cap of the video. **

Greetings fellow developers! Today, we're excited to take you on a journey into the  world of Chat GPT and its transformative impact on software development. Strap in, because we're about to explore the ins and outs of this incredible tool that's changing the way we approach coding and problem-solving.

**Embracing the Power of Chat GPT**

Imagine a tool that not only understands your coding challenges but also assists you in generating solutions swiftly. That's the promise of Chat GPT, an advanced language model that has become my go-to companion in the development process. Whether you're a seasoned coder or just dipping your toes into the programming pool, Chat GPT is here to simplify and supercharge your workflow.In James' Feore's talk, he dissects the transformative impact that ChatGPT has had on the software development process; highlighting the multitude of ways it can be used to streamline any developers workflows - from generating code snippets and providing insightful solutions, to helping answer complex queries with actionable responses. It's more than just a sidekick; it's a reliable partner for developers across a spectrum of projects.

Throughout his talk, James takes a comprehensive deep dive into how you can use ChatGPT for: 

- Debugging‍‍
- Learning new libraries‍‍
- Walking through new codebases‍‍
- Architecture questions + decisions‍‍
- Technical Writing‍‍
- and much more!!

The integration of Chat GPT into software development marks a paradigm shift. As we embrace this AI-powered tool, we're on the cusp of increased efficiency, accelerated project timelines, and a redefined role for engineers. Don't miss this opportunity to streamline your workflows and boost productivity with the assistance of your new partner,ChatGPT! 

Happy coding!

**Yeti is an [IoT application development company](https://www.yeti.co/about) with over a decades worth of experience building meaningful digital products. If you're beginning your app development journey, and are looking for an experienced parter, we'd love to talk. Feel free to send a message our way and we'll get back to you ASAP!**
2149. Rearrange Array Elements by Sign
Tags: java
Published: 2024-02-14 22:51:11

You are given a 0-indexed integer array nums of even length consisting of an equal number of positive and negative integers.

You should rearrange the elements of nums such that the modified array follows the given conditions:

    Every consecutive pair of integers have opposite signs.
    For all integers with the same sign, the order in which they were present in nums is preserved.
    The rearranged array begins with a positive integer.

Return the modified array after rearranging the elements to satisfy the aforementioned conditions.

 

Example 1:

Input: nums = [3,1,-2,-5,2,-4]
Output: [3,-2,1,-5,2,-4]
Explanation:
The positive integers in nums are [3,1,2]. The negative integers are [-2,-5,-4].
The only possible way to rearrange them such that they satisfy all conditions is [3,-2,1,-5,2,-4].
Other ways such as [1,-2,2,-5,3,-4], [3,1,2,-2,-5,-4], [-2,3,-5,1,-4,2] are incorrect because they do not satisfy one or more conditions.  

Example 2:

Input: nums = [-1,1]
Output: [1,-1]
Explanation:
1 is the only positive integer and -1 the only negative integer in nums.
So nums is rearranged to [1,-1].

 

Constraints:

    2 <= nums.length <= 2 * 105
    nums.length is even
    1 <= |nums[i]| <= 105
    nums consists of equal number of positive and negative integers.

 
It is not required to do the modifications in-place.

Solution-1 slow one
```java
class Solution {
    public int[] rearrangeArray(int[] nums) {
        Queue<Integer> pos=new LinkedList<>();
        Queue<Integer> neg=new LinkedList<>();
        for (int i = 0; i < nums.length;i++) {
            if(nums[i]>0){
                pos.add(nums[i]);
            }else{
                neg.add(nums[i]);
            }
        }
        for (int i = 0; i < nums.length;i++) {
            if(i%2==0)
                nums[i]=pos.poll();
            else
                nums[i]=neg.poll();
        }
        return nums;
    }
}
```
faster solution
```java
class Solution {
    public int[] rearrangeArray(int[] nums) {
        int result[] = new int[nums.length];
        int p=0;
        int n=1;
        
        for(int i=0;i<nums.length;i++){
            if(nums[i]>0){
                result[p]=nums[i];
                p+=2;
            } else {
                result[n]=nums[i];
                n+=2;
            }
        }
        return result;
    }
}
```
Reference:https://leetcode.com/problems/rearrange-array-elements-by-sign/description/?envType=daily-question&envId=2024-02-14
Visual Studio pro tips
Published: 2024-02-14 22:18:19

Get ready to supercharge your Visual Studio game with these killer pro tips! We're talking about shortcuts that'll make your fingers fly, debugging tools that'll save your bacon, and ways to customize Visual Studio to fit you like a glove. Let's dive in and level up your coding mojo!
[Link](https://www.youtube.com/playlist?list=PLReL099Y5nRc-zbaFbf0aNcIamBQujOxP)

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/is421i6lemm19pfkdpml.png)
Keyword research as an SEO technique.
Tags: seo
Published: 2024-02-14 22:15:37


In the  [previous](https://medium.com/@AgnesMbiti/seo-intoduction-for-complete-beginners-952d4875ada4)  article, we got an introduction on what search engine optimization , alias SEO is.

We also looked at some of the most common SEO techniques used, keyword research being at the top of the list.We are going to dive a little deeper into keyword research and implementation as an SEO technique.

After identifying our keywords for the content, here is a few convenient places you can place them for better results.

1.  **_Place identified keywords in your URL._**

![URL domain](https://miro.medium.com/v2/resize:fit:584/1*DBp33yyErZraNmZkfaNcvA.jpeg)

Most search engines like Google use your web page URL to get a clue about your page content. This is why it is important to make sure you optimize your URL for faster results. Keywords are mostly placed in the URL slug. Do not make the description extra long , rather, keep the description short and to the point.

**_2. Place identified keywords in between H1 tags._**

![](https://miro.medium.com/v2/resize:fit:641/1*zvRh6rwRuaMXhv7VAqRKxw.png)

H1 tags basically mean your title. Be sure to place some keywords in your page titles for faster results. This makes it easier for the search engines to crawl into your page content and identify them, hence displaying your page faster ,after specific search queries.

**_3. Place identified keywords in your metadata._**

![](https://miro.medium.com/v2/resize:fit:580/1*ryDXI7wMVMsCobPIXSgF3Q.png)



By placing your keywords in the metadata , you give your page a higher chance of being among the top results when certain search queries are run. Just like in the URL , keywords in the metadata do not need to be overdone. Short and descriptive phrases get the work done too.

**_4. Place keywords in your content._**

Last but not the least, place keywords in your content. Use phrases that are mostly likely to relate to what you want to convey.

By following all of these keyword techniques, you will have given search engines multiple opportunities to fish out keywords and get a clue what your content is about.
Exploring The Main Concepts in the Cosmos SDK, Part 1 Accounts.
Tags: cosmos, blockchain, cudos, interchain
Published: 2024-02-14 22:13:05

Develop an understanding of the main concepts of the Cosmos SDK, from account to modules, keepers, queries, and protobuf in the interchain. Today we will be learning about accounts. Stay tuned for other concepts. 

## Accounts 
An account is a pair of keys:

- **PubKey:** a public key
- **PrivKey:** a private key

A public key is a unique identifier for a user or entity that is safe to disclose. Private keys are sensitive information that users are required to manage confidentially. Private keys are used to sign information in a way that proves to others that a message was signed by someone using the private key corresponding to a given public key. This is done without revealing the private key itself. 

### Public key cryptography
Public key cryptography is also known as asymmetric cryptography and is a cryptographic system that employs pairs of keys. Every pair consists of a public and a private key. The security of the system is not endangered as long as the private key is not disclosed. Asymmetric cryptography do not require users to use a secure channel to exchange the keys for encryption and decryption, unlike symmetric cryptography.

Asymmetric cryptographic keys are usually very long. And this is good because: the longer the key, the more difficult it is to crack the code. To Break an asymmetric key an attacker would need to try every possible key to find a match. 

Asymmetric keys always come in pairs and offer their owner various capabilities based on cryptographic mathematics. The public key is meant to be distributed to whoever is relevant, while the private key is to remain a secret. This is similar to your bank account number, but keeping the pin safe with you. 

Asymmetric cryptography has two main implementations 

- **Authentication**: The public key serves as a verification tool for the private key pair. 
- **Encryption**: Only a private key can decrypt the information locked by the corresponding public key.

### Sign and verify 
Lets see an example of using private and public key to sign and verify. 

Bob and Alice are having a conversation, Alice made a public announcement and Bob wants to verify it's indeed from Alice: 

- Alice gives Bob her public key. 
- Alice signs the announcement with her private key. 
- Bob receives the announcement sent by Alice along with it's signature. 
- Bob verifies the announcement using Alice public key.

Bob used Alice public key to verify if the private key used to sign that signature corresponds to Alice public key. 

> Private keys are used to prove that messages originate from the owners of accounts known by their public keys: the signatures prove that messages were signed by someone that knows the private key that corresponds to a given public key. This is the basis of user authentication in a blockchain, and why private keys are strictly guarded secrets.

### Conclusion 
Here is a wrap we've been able to go through Accounts, one main concepts of the cosmos SDK. Stay tuned for other Concepts coming shortly

**Happy Learning!**
SEO intoduction for complete beginners.
Tags: seo
Published: 2024-02-14 22:09:21


You have come across the word Search Engine Optimization , or in short, SEO, at some point in your life. Well what is it exactly? In this article, we will explain it in layman’s language.

SEO refers to the practice of optimizing web pages, so as to increase their visibility on search engines, for example, Google. Usually, when someone inputs anything on Google, there is tons of background activities, or algorithm , that runs through thousands of pages to ensure it displays pages related to what you just input.

Since Google was created in 1998, it’s safe to acknowledge that billions of data has been fed to it over the years. And most of this data is on similar topics. That is where SEO comes in. When you have a web page, you’ll want your page to pop up among the first results in your data category. With SEO techniques, you can optimize your web page to do exactly that. For you to properly optimize your page, you have to know exactly what the users are looking for, then create content that is going to be useful to the user when it is displayed.

Some of the most commonly used SEO techniques include ;

 **_1.Keyword Research_**

Before you write down content, you already know exactly what message you want to convey. It is then important to research and identify specific keywords that are going to create traffic to your page. For example, if you are writing content on cryptocurrency, you will have to go online and research mostly used phrases and keywords that are mostly used on the same. This in turn improves your pages’ relevance to the cryptocurrency topic and the search query.

**_2. Update old content_**

With the current world of trends that we live in , web page content needs to be occasionally updated so as to keep up. Content, mostly if it is time-sensitive, needs to be updated from time to time. Some of the keywords that were previously used to display its results when searched , might change, so the need to edit and use newer keywords.

**_3. Have a neat page structure._**

Sounds simple, right? Because it is. Having a well structured page,from the content, to the HTML code ,makes it easier for the search engines to navigate and find the keywords needed.

**_4. Social media optimization._**

There is power in large numbers, right ? Social media optimization is done by actively publicizing your web page on social media apps, ie,  _Twitter, Facebook_, or whichever social media account you are on.

Point to note, SEO is a technique by itself that requires close monitoring and analysis for it to be deemed a success.
Website audit definition?
Published: 2024-02-14 22:05:51

Website audit is a comprehensive analysis aimed at identifying issues with a website for the purpose of addressing and improving its visibility on search engines, enhancing functionality, and ensuring user convenience.

We have prepared a checklist that can be used to conduct a website audit in Europe, encompassing all crucial processes involved in its execution.

FIRST STAGE OF THE AUDIT — SITE CODE ANALYSIS

Code Validity: Identifying errors in the code that may affect the site's ranking or indexing.
robots.txt File: Checking the correctness of this file, ensuring it correctly outlines indexing rules without restricting important sections.
XML and HTML Sitemaps: Ensuring the creation of both maps, with XML for search engines to index important pages and HTML for user navigation.
Server Responses: Verifying HTTP headers to ensure correct server responses, emphasizing proper handling of error pages like 404.
Page Loading Speed: Checking page load speed, aiming for it to be within 3 seconds, using tools like Google's PageSpeed Insights.
SECOND STAGE OF THE AUDIT — SITE CONTENT CHECK

Duplicate Content: Identifying and tracking duplicate content to eliminate it, as duplicates can negatively impact indexing and page ranking.
Images and Tags: Ensuring images are unique and have properly defined ALT and Title tags.
Text Content Check: Evaluating text parameters such as size, uniqueness, keyword presence, and search engine indexing.
THIRD STAGE OF THE AUDIT — SEMANTIC CORE ANALYSIS

Semantic Core Check: Examining the distribution of the semantic core across site pages and analyzing page positions for keywords.
Entry Points Analysis: Identifying user entry points and evaluating their alignment with the planned ones.
FOURTH STAGE OF THE AUDIT — INTERNAL RANKING FACTORS

URL Structure Check: Ensuring human-readable links containing keywords and a simple site structure with minimal nested pages.
Title and Description: Verifying the uniqueness of Title and Description tags for each page.
Heading Tags <h1>-<h6>: Ensuring each page has only one <h1> and an appropriate use of other heading tags.
FIFTH STAGE — EXTERNAL RANKING FACTOR ANALYSIS

External Links to the Site: Checking donor quality, link profile, and preparing for the removal of bad links.
Anchor Text Analysis.
Social Media Presence: Analyzing links and mentions on social media platforms.
After conducting a website audit in Europe, all gathered information is compiled into an easily readable format, and a plan for website improvement is devised.


You can read this and many other articles on website promotion in the SEO blog - https://alexsend.com/blog
How to create a python virtual environment on Ubuntu 22.04.
Tags: ubuntu, virtualenvironment, python, programming
Published: 2024-02-14 22:05:27


Most of the time when we are working on python projects, we are bound to install different dependencies that help us achieve different project goals. It is important that we create virtual environments for each and every python project so as to keep the specific project dependencies isolated from the rest.

## **_Prerequisites._**

Ubuntu 22.04

## **1. System update.**

First and foremost, to ensure that your system is up to date, run the command below
```
sudo apt update
```
Next, run the following apt command

```
sudo apt upgrade
```
## 2. Pip install.

After making sure your system is up to date with the latest packages using the above commands,  install pip by running the command below. 
```
sudo apt-get install python3-pip
```
## 3. Virtualenv install.

Virtualenv is used to isolate virtual environments for python projects.We install it using pip3 by running the command below.
```
sudo pip3 install virtualenv 
```
## 4. Creating a virtual environment.

Next, we create the virtual environment, which is done by running the command below.
```
virtualenv venv 
```
_Point to note: You can use your preferred name in place of “venv”._

After running the command above, a directory named venv appears at the root of your project. The said directory contains python executable files.

## 5. Activating virtual environment.

All we have left to do now is activate our virtual environment. Let’s run the final command to activate our environment .
```
source venv/bin/activate
```
Voila! Our python virtual environment is now set up and activated.

## 6. Deactivating the virtual environment.

For one reason or the other, we might need to deactivate our environment. To do this, we run the command below.
```
deactivate
```
Now you have a step by step guide on how to create, activate, and deactivate a python environment.
The Significance of Adaptive Design and its Impact on User Experience
Published: 2024-02-14 21:59:07

In today's digital age, the importance of adaptive design cannot be overstated. Adaptive design refers to creating websites that seamlessly adjust their layout and functionality based on the user's device, screen size, and orientation. This approach is particularly crucial for web development across Europe, including Spain and Germany, where creating websites that cater to diverse audiences is essential.

Creating Websites in Europe:
In the competitive landscape of <a href="https://alexsend.com/">website development in Europe</a>, the demand for adaptive design is driven by the diverse range of devices used by users. Whether accessing websites on desktops, laptops, tablets, or smartphones, an adaptive design ensures a consistent and optimized experience across all platforms. This adaptability is paramount to meet the expectations of users in countries like Spain and Germany, where the internet is accessed through a variety of devices.

Enhancing User Experience in Spain:
When considering the <a href="https://alexsend.com/web/es">creation of websites in Spain</a>, a country known for its rich cultural diversity and technological advancement, adaptive design becomes a key factor in enhancing user experience. Users in Spain often access websites on-the-go through mobile devices. Therefore, an adaptive design not only caters to the cultural preferences but also ensures a seamless transition between devices, contributing to an improved and user-friendly experience.

Optimizing for Diverse Devices in Germany:
Germany, as a leading European economy, places a strong emphasis on technological innovation. With a tech-savvy population, the <a href="https://alexsend.com/web/de">creation of websites in Germany</a> involves addressing the diverse range of devices used by users. Adaptive design ensures that websites are optimized for various screen sizes and resolutions, offering an optimal experience for users in Germany who access websites through smartphones, tablets, and desktop computers.

Adapting to Technological Advancements in Europe:
As technology continues to evolve, so does the need for adaptive design. Europe, with its diverse markets and user behaviors, requires websites that can adapt not only to current trends but also to emerging technologies. Adaptive design future-proofs websites, ensuring they remain relevant and effective in the face of evolving user preferences and technological advancements.

Conclusion:
In conclusion, adaptive design plays a pivotal role in creating user-centric websites, especially in the context of Europe, Spain, and Germany. It ensures a seamless and optimized experience across various devices, contributing to user satisfaction and the success of websites in today's dynamic digital landscape. As the demand for accessible and user-friendly websites continues to rise, adaptive design remains a cornerstone in the realm of web development.