teleren/devto huggingface dataset:
How do i win 3 hackathon in one month
Tags: web3, gitcoin, solidity, hackatho
Published: 2023-02-25 12:39:11

# overview
If you are interested in competing in a Web3 hackathon, it is important to understand that a hackathon is a challenging event that requires a lot of work, dedication, and creativity. However, with the right mindset and approach, you can increase your chances of winning. Here are some tips to help you win a Web3 hackathon:

## Understand the Theme and Criteria
The first step to winning a Web3 hackathon is to understand the theme and criteria of the hackathon. Make sure you read the rules and guidelines carefully, so that you can create a project that meets the requirements and stands out from the competition.
## Research and Brainstorm
Once you know the theme and criteria of the hackathon, start researching and brainstorming ideas for your project. Consider what problems you can solve using Web3 technologies and how your project can add value to the Web3 ecosystem.
## Focus on User Experience
User experience is an important factor in creating a successful Web3 project. Consider how your project can make the user's experience smoother, more efficient, and more enjoyable.
## Build a Minimum Viable Product (MVP)
A minimum viable product (MVP) is a basic version of your project that has enough features to demonstrate its value. Building an MVP is important because it allows you to get feedback from users and judges, and make improvements before the final presentation.
## Implement Web3 Technologies
Web3 technologies are the backbone of the Web3 ecosystem. To win a Web3 hackathon, it is important to implement Web3 technologies in your project. Some examples of Web3 technologies include blockchain, decentralized storage, and smart contracts.
## Create a Clear and Concise Pitch
Your pitch is the key to winning a Web3 hackathon. Make sure your pitch is clear, concise, and compelling. Focus on the most important features of your project and explain how your project solves a real-world problem.
## Practice and Refine Your Presentation
Practice makes perfect. Before the final presentation, practice your pitch and make sure it is well-rehearsed. Also, consider getting feedback from others to refine your presentation.
## Network and Collaborate with Others
Networking and collaboration are important in a Web3 hackathon. Attend workshops, meetups, and other events to meet other participants and potential collaborators. Collaborating with others can help you create a stronger project and increase your chances of winning.
In conclusion, winning a Web3 hackathon requires hard work, dedication, and creativity. By following these tips, you can increase your chances of winning and make your mark on the Web3 ecosystem. Good luck!

contact me in social media:
[twitter](https://twitter.com/coffiasse)
CALL, APPLY va BIND o'zi nima va qanday farqlari bor?
Tags: javascript, call, apply, bind
Published: 2023-02-25 12:10:29

JavaScriptda call, apply, va bind funktsiyalari, this kontekstining qiymatini o'zgartirish uchun ishlatiladi.

call va apply funksiyalari o'z ichiga olgan funksiyani boshqa obyektning bo'sh funksiyasi sifatida chaqirishga imkon beradi. Bunday chaqirishda, asosiy maqsad - o'zgaruvchi kontekstini o'zgartirishdir. Farqlari esa kiritilgan argumentlarda bor. call funktsiyasi bir-biridan ajratilgan argumentlar bilan, apply esa bir ro'yxat argumenti bilan ishlaydi.

bind funktsiyasi esa o'z ichiga olgan funksiya va obyektning o'zgaruvchi kontekstiga bog'liq bo'lmasa ham, o'zgartirilgan variantini qaytaradi. Bunda, asosiy maqsad this kontekstini o'zgartirish emas, balki boshqa bir nechta argumentlarga asoslanadi. bind ishlatilganda, yangi funktsiya qaytariladi va unga kerakli argumentlar otalib, keyin chaqirish mumkin.

Sintaksislar quyidagicha ko'rinadi:

```javascript
function.call(ozgaruvchi_konteksti, argument1, argument2, ...);
function.apply(ozgaruvchi_konteksti, [argument1, argument2, ...]);
function.bind(ozgaruvchi_konteksti, argument1, argument2, ...);
```
call va apply funksiyalari bir-biridan ajratilgan argumentlar bilan chaqiriladi, bu argumentlar obyektga ko'rsatilgan o'zgaruvchi kontekstida this sifatida ishlatiladi. bind esa funksiyani o'zgartirilgan variantini qaytaradi, va bunda o'zgartirilgan kontekst va argumentlar beriladi.

Keyin funksiya chaqirishida, asosiy funktsiyani call yoki apply ishlatib chaqirish mumkin. bind esa o'zgartirilgan variantini qaytaradi va keyin uni chaqirish mumkin.


Farqlari esa quyidagicha ko'rinadi:

call va apply funksiyalari natijada funksiya yakka obyekt sifatida chaqiriladi, bind esa yangi funksiya qaytaradi.
call va apply funksiyalari faqat bir marta chaqiriladi, bind esa kerakli soni bo'lishiga qaramay, ko'p marta chaqirilishi mumkin.
call va apply funktsiyalari bir-biridan ajratilgan argumentlar bilan ishlaydi, bind esa argumentlarni biriktiradi va yangi funksiya qaytaradi.
Database Federation
Tags: systems, architecture, database, beginners
Published: 2023-02-25 11:52:57

In a database, when it needs to be split up by functions, we use federation architecture. In common words, we can call the federation functional partitioning as well. There are multiple physical databases in the architecture which are presented as a logical database to the end-users. This is because the components here are bound together by federal schemas. The latter has common data throughout the federation that can be used to specify the information to share among the components for a common basis of communication for them. In addition, there are cohesive, unified views of data from multiple data sources in the database federation architecture. There are both structured and unstructured data in the database of these sources.

![Database Federation](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/wf5118kj8yo3z45ciaeb.jpg)

## Why use database federation?

Below is the reason why you should choose database federation.

- Data Sharing is flexible
- Database components have autonomy among themselves
- Heterogenous data can be accessed in a unified way
- Legal databases have loosely coupled applications

## Characteristics of database federation

- The users have no idea where the data is stored. The differences and the implementation of underlying data sources are masked.
- The database system can easily add new sources if required.
- A federated database can have multiple hardware, network protocols, data models, etc.
- The existing database and the interface are not changed.
- The data integration is supported in the federation architecture.

## Are there any demerits?

The database federation also comes with some demerits.

- More hardware is required
- The operations are more complex since joining the data from two databases is hard.
- We are overly dependent on autonomous data sources.
- Query performance
- Scalability

{% embed https://github.com/pragyaasapkota/System-Design-Concepts %}

**_I hope this article was helpful to you._**

**_Please don’t forget to follow me!!!_**

**_Any kind of feedback or comment is welcome!!!_**

**_Thank you for your time and support!!!!_**

**_Keep Reading!! Keep Learning!!!_**
Parse CLI arguments in .NET
Tags: dotnet, csharp, cli, commandlineparser
Published: 2023-02-25 11:37:00

In my day-to-day job we needed a way to parse command line arguments in an easy and structured way.

So after some research I found the awesome NuGet-Package [Command Line Parser Library](https://github.com/commandlineparser/commandline). This package allows to define your options with Property-Attributes.

## Example of a CommandLineOptions class
In this example class we define all options we want to parse as properties and create a static collection of Examples that will be displayed in the tools command line help.

```csharp
public class CommandLineOptions
{
    /// <summary>
    /// e.g. yourapp.exe -d|--database "DatabaseName"
    /// </summary>
    [Option(
        shortName: 'd',
        longName: "database",
        Required = true,
        HelpText = "Name of the database to be used")]
    public string DatabaseName { get; set; }

    /// <summary>
    /// e.g. yourapp.exe -l|--language "DE"
    /// </summary>
    [Option(
        shortName: 'l',
        longName: "language",
        Required = false,
        HelpText = "Country short key (EN|DE|IT|ES) for the report language")]
    public string ReportLanguage { get; set; }

    [Usage(ApplicationAlias = "yourapp.exe")]
    public static IEnumerable<Example> Examples =>
        new List<Example>()
        {
            new Example
            (
                "Use default settings",
                new CommandLineOptions()
                {
                    DatabaseName = "DatabaseName",
                }
            ),
            new Example
            (
                "Use custom report language",
                new CommandLineOptions()
                {
                    DatabaseName = "DatabaseName",
                    ReportLanguage = "DE"
                }
            )
        };
}
```

## Parse CommandLineOptions class
When your tool is executed you can than parse the passed arguments into the `CommandLineOptions` class as follows.

```csharp
static void Main(string[] args)
{
  CommandLine.Parser.Default.ParseArguments<CommandLineOptions>(args)
    .WithParsed(ExecuteWithOptions)
    .WithNotParsed(HandleParseError);
}

static void ExecuteWithOptions(CommandLineOptions options)
{
  // Handle options
}

static void HandleParseError(IEnumerable<Error> errors)
{
  // Handle errors
}
```
C++'s data types
Published: 2023-02-25 11:02:34

Hammaga salom. Kecha biz C++ ning Data typlarini o'tdik. Ular barchasi bo'lib 6 ta(Lekin man faqat 4 tasini bilaman 😁). Ularning nomlari:str - string, int - integer,
float - qisqarmasi yo'q, char - qisqarmasi yo'q. Endi ketma-ket hammasini o'rganib chiqamiz

                             String

1. String - str, matnlar uchun bo'lib uni "" yoki '' bilan chaqiriladi.

include <iostream>
using namespeace std;

int main(){
    
   cout << "Sarvar"; 

  return 0;
}

2. Inteder - int, butun sonlar uchun uni consolga chiqatishda faqat o'zini yozamiz.

include <iostream>
using namespeace std;

int main(){
    
   cout << 32; 

  return 0;
}

3.float - bu kasr sonlar uchun ishlatiladi. Uni ham o'zini yozamiz.

include <iostream>
using namespeace std;

int main(){
    
   cout << 3.2; 

  return 0;
}

4.char - bu belgilar uchun qo'lanadi. Buni '' bilan chiqaramiz (manimcha).

include <iostream>
using namespeace std;

int main(){
    
   cout << '$'; 

  return 0;
}

Bularning hammasini o'zining hotiralari bor.

int - 4 bytes
float - 4 bytes
char - 1 byte.
Resolving SSH Permission Denied Errors Due to OpenSSH Version Vulnerabilities
Tags: howto, webdev, ssh
Published: 2023-02-25 10:44:00

If you have encountered errors while using SSH, such as the ones below:

Example 1:
```bash
foo@12.34.56.789: Permission denied (publickey).
```
Example 2:
```bash
sign_and_send_pubkey: no mutual signature supported
foo@12.34.56.789: Permission denied (publickey).
```

It's possible that you may be using an older version of OpenSSH on your server that is vulnerable to the SHA-1 algorithm, which was disabled in OpenSSH version 8.8 (2021-09-26). If you're certain that you've correctly added the public key to your server, this could be the cause of the error messages.

To determine your local OpenSSH version, enter the following command:
```bash
ssh -vv local
```

The result should look like this:

![OpenSSH version](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ovqgps1mlz5e2e7lguiw.png)

To resolve the issue, add `PubkeyAcceptedKeyTypes +ssh-rsa` to your Host entry in the ~/.ssh/config file. It should look like this:

```bash
Host fooServer
PubkeyAcceptedKeyTypes +ssh-rsa
Hostname 12.34.56.789
User forge
IdentityFile=~/.ssh/id_rsa
```

After making these changes, try again and the issue should be resolved.
Introduction to Rspec (Testing)
Published: 2023-02-25 10:02:08

## What is the testing framework:

A testing framework automates the test code that executes and verifies bug checks (= operation checks). In other words, a testing framework is a framework that makes it easy to implement tests.

A software framework that provides functions such as creating automatic execution programs for software tests, intuitive judgement, and automatic aggregation of test results.

Testing framework in Ruby:
There are mainly three testing frameworks in Ruby, and the order of usage is as follows

1. RSpec
2. Minitest
3. test-unit .

## What is the Rspec:

RSpec is one of Ruby’s testing frameworks and the most used language among Ruby developers.

RSpec’s R stands for Ruby and Spec stands for test code.

As a feature, RSpec is created based on the Ruby language, so it has the advantage that anyone who understands Ruby to some extent can easily implement it.

## How to install:

Add the code below to the Gemfile and after that, run the command “bundle install”

```
group :development, :test do
  # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
  gem "debug", platforms: %i[ mri mingw x64_mingw ]
  # this is for the test case for rspec
  gem 'rspec-rails'
end
```
Next are the RSpec settings:

```
rails g rspec:install # this command type in our project folder terminal and it is create the below files
# this above command generate the four files 
create  .rspec # file genrated
create  spec # file generated
create  spec/spec_helper.rb # file generated
create  spec/rails_helper.rb # file generated

rspec --format d # type this commnd in bash terminal

No examples found.

Finished in 0.00024 seconds (files took 0.05174 seconds to load)
0 examples, 0 failures


Note: --format d => is an option to make the test output results easier to read.

```

> Regarding the above, I will upload the next post soon…
Refactoring: The Key to Keeping Your Codebase Clean and Maintainable
Tags: refactoring, refactorit, computerscience, software
Published: 2023-02-25 10:00:00

Refactoring is the process of improving the structure and design of existing code without changing its external behavior. By regularly refactoring your code, you can improve its readability, maintainability, and scalability.

## **What is Refactoring?**

Refactoring is the process of improving the structure and design of existing code without changing its external behavior. This includes things like:

- Renaming variables and methods to make them more meaningful
- Extracting methods and classes to make them more modular
- Removing duplicated code
- Simplifying complex logic

Refactoring is an ongoing process that should be done regularly as part of the software development cycle. It helps to ensure that the codebase is clean, readable, and easy to maintain.

## **The Benefits of Refactoring**

Refactoring provides numerous benefits for software development, including:

- **Readability:** By regularly refactoring your code, you can improve its readability, making it easier for other developers to understand and work with.
- **Maintainability:** Refactoring promotes a more modular and testable codebase, making it easier to maintain and update the software.
- **Scalability:** By improving the structure and design of existing code, refactoring makes it easier to scale a system as needed.
- **Efficiency:** Refactoring helps to eliminate code smells, such as duplicated code, and makes the code more efficient and performant.

## **An Example: A Social Media App**

An example of refactoring is an application that allows users to post and view messages. The initial version of the application has a single class called "Post" that handles both creating and viewing posts.

During the refactoring process, we can extract a new class called "ViewPost" that will be responsible for displaying the posts. This separation of concerns will make the code more readable and maintainable. Additionally, it will make it easier to scale the application in the future if we want to add new features, such as searching or filtering posts.

## **Conclusion**

Refactoring is the process of improving the structure and design of existing code without changing its external behavior. By regularly refactoring your code, you can improve its readability, maintainability, and scalability. It is an ongoing process that should be done regularly as part of the software development cycle.

Refactoring is not only about cleaning up the codebase but also about making it more efficient, readable and scalable. It allows developers to improve the design of the code without affecting the functionality, making it easier to maintain and adapt to new requirements.

So, don't be afraid to refactor your code, it is a sign of a healthy development process and it will pay off in the long run. Make refactoring a part of your development process and see how it can benefit your software development.
What can you learn from examining code in multiple languages?
Published: 2023-02-25 09:59:19

---
title: What can you learn from examining code in multiple languages?
published: true
description: Are you curious about how programming languages work? In this video, we explore the RosettaCode website and showcase a variety of coding tasks and examples in different programming languages. By examining real-world code, you'll gain insights into the unique features and best practices of each language. Plus, we walk through some coding examples to demonstrate how you can apply these insights to your own coding projects. Whether you're a seasoned developer or just starting out, you won't want to miss this fascinating deep dive into the world of coding.
tags:
cover_image: https://i.ytimg.com/vi/6phQL1AsHaQ/maxresdefault.jpg
---

{% youtube 6phQL1AsHaQ %}

Are you curious about how programming languages work? In this video, we explore the RosettaCode website and showcase a variety of coding tasks and examples in different programming languages. By examining real-world code, you'll gain insights into the unique features and best practices of each language. Plus, we walk through some coding examples to demonstrate how you can apply these insights to your own coding projects. Whether you're a seasoned developer or just starting out, you won't want to miss this fascinating deep dive into the world of coding.
Crazy Time Live: Play Now to Win Big!
Tags: crazytimelivebd, crazylivebd, craztimebd, crazytimebanglade
Published: 2023-02-25 09:42:50

[Crazy Time Live](https://crazytimebangladesh.com) is a unique live online game show built on Dream Catcher money wheel concept. Crazy time live was created by the game provider Evolution Gaming, and was released in mid-2020. It has been eagerly awaited by the players and has been a great success upon its release.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/dlecn95oilf9exnio7qw.jpg)

Now the interactive fun and excitement reaches crazy new levels with the chance to add multipliers from the Top Slot in each game round and in four exciting bonus games. Interactive elements and advanced technology make it possible for players to win different multipliers in two out of the four bonus games. Offering live entertainment with added advanced RNG gameplay, Crazy Time offers a one-of-a-kind player experience, and with multipliers up to 25,000x the fun hits a new high!
The difference between reassigning and modifying arrays in TypeScript 👨‍💻
Tags: typescript, javascript, webdev, array
Published: 2023-02-25 09:41:45

In TypeScript, there is a difference between reassigning and modifying arrays. When you declare an array variable using _**const**_, you can modify the elements of the array but you cannot reassign the array to a new value. On the other hand, when you declare an array variable using _**let**_, you can both modify the elements of the array and reassign the array to a new value.

To understand the difference between reassigning and modifying arrays, let's take a look at some examples.

## 🍂 Modifying an Array

When you modify an array, you change the value of one or more elements in the array. This is allowed for arrays declared using **_const_** or **_let_**. Here's an example:

```
const myArray = [1, 2, 3];
myArray[0] = 4;
console.log(myArray); // Output: [4, 2, 3]
```

In this example, we declare an array _myArray_ using _**const**_ and initialize it with the values _[1, 2, 3]_. We then modify the value of the first element in the array by assigning it the value _4_. The output of _console.log(myArray)_ shows that the first element of the array has indeed been modified to _4_.


## 💫 Reassigning an Array 

When you reassign an array, you change the entire array to a new value. This is only allowed for arrays declared using _**let**_. Here's an example:

```
let myArray = [1, 2, 3];
myArray = [4, 5, 6];
console.log(myArray); // Output: [4, 5, 6]
```
In this example, we declare an array _myArray_using _**let**_and initialize it with the values _[1, 2, 3]_. We then reassign the entire array to a new value _[4, 5, 6]_. The output of _console.log(myArray)_ shows that _myArray_ now contains the new value _[4, 5, 6]_.

## ⛔ Differences between const and let

When you declare an array using _**const**_, you are declaring a constant reference to an array. This means that you cannot reassign the reference to the array to a new value. However, you can still modify the elements of the array.

When you declare an array using _**let**_, you are declaring a variable reference to an array. This means that you can both modify the elements of the array and reassign the entire array to a new value.

## 💖 Conclusion

In TypeScript, it is important to understand the difference between reassigning and modifying arrays. If you need to change the entire array, you should use _**let**_. If you only need to change the values of one or more elements in the array, you can use _**const**_. By understanding these differences, you can write better and more efficient TypeScript code.
Glassmorphism Login Form
Tags: webdev, html, css, javascript
Published: 2023-02-25 09:22:21

> Glassmorphism Login Form Using HTML, CSS & JavaScript.
![Glassmorphism Login Form Using HTML, CSS & JavaScript.](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/46nw19oqhnm7eia9si7a.png)

Source Code on:
https://www.avabucks.it/assets/components/1672079217

by
[Junior Developer](https://www.avabucks.it/profile?q=Junior%20Developer)