teleren/devto huggingface dataset:
8- How to Determine if a Raster Layer is Valid in PyQGIS
Tags: python, programming, pyqgis
Published: 2023-03-24 08:39:32

--- series: A beginner's guide to using Python with QGIS ---
Are you a PyQGIS user struggling with validating raster layers? Look no further! In this article, we will guide you through the process of checking the validity of a raster layer using PyQGIS. With our step-by-step instructions, you'll be able to easily determine whether your raster layer is valid or not. So, let's get started and ensure that your raster layer is ready to be used in your PyQGIS project.

Load a raster layer:

```plaintext
uri = "D:/Python_QGIS/data/dem_subset.tif"
rlayer = iface.addRasterLayer(uri, "my_raster", "gdal")
```

Check if the raster layer is valid or not:

```plaintext
if rlayer.isValid():
    print("Great this is a valid raster layer!")
else: 
    print("This is invalid raster layer!")
```

If the layer is valid, you're good to go! If the layer is not valid, there may be an issue with the layer's metadata, projection, or data format. You can try re-saving the layer in a different format or checking the metadata to see if there are any errors.  

In conclusion, checking the validity of a raster layer is an important step in ensuring that it can be used effectively in a PyQGIS project. By following the steps outlined in this article, PyQGIS users can easily determine whether their raster layer is valid or not. Additionally, if the layer is not valid, users can take steps to troubleshoot and resolve any issues. Remember to always validate your raster layers before using them in a project!

> If you like the content, please [SUBSCRIBE](https://www.youtube.com/channel/UCpbWlHEqBSnJb6i4UemXQpA?sub_confirmation=1) to my channel for the future content
7- Display the attribute table for a vector layer
Tags: python, programming, pygiq
Published: 2023-03-24 08:26:41

--- series: A beginner's guide to using Python with QGIS ---
As a GIS enthusiast, you know that one of the most important aspects of working with vector layers is the ability to view and manipulate attribute data. Fortunately, QGIS provides a simple way to access this information with the *iface.showAttributeTable()* function. In this article, we'll explore how to use this function to open the attribute table of a vector layer, so you can quickly access and analyze the data you need.

```plaintext
uri = "D:/Python_QGIS/data/Countries.shp"
vlayer = QgsVectorLayer(uri, "Countries", "ogr")

iface.showAttributeTable(vlayer)
```

QGIS provides a simple way to access attribute data with the *iface.showAttributeTable()* function. This function enables users to open the attribute table of a vector layer, which is essential for viewing and manipulating attribute data. By using this function, GIS enthusiasts can quickly access and analyze the data they need. Overall, the ability to view and manipulate attribute data is crucial in GIS, and QGIS provides an efficient way to do so.

> If you like the content, please [SUBSCRIBE](https://www.youtube.com/channel/UCpbWlHEqBSnJb6i4UemXQpA?sub_confirmation=1) to my channel for the future content
6- Obtaining information from a vector layer
Tags: python, programming, pygqi
Published: 2023-03-24 08:14:55

--- series: A beginner's guide to using Python with QGIS ---
Learn how to retrieve information about the fields of a vector layer in QGIS with the help of the *fields()* function. In this article, we'll explore how to use this function on a *QgsVectorLayer* to extract useful information about the fields of a vector layer. Whether you're a GIS professional or a beginner, this guide will help you better understand how to work with vector layers in QGIS.

```plaintext
uri = "D:/Python_QGIS/data/Countries.shp"
vlayer = QgsVectorLayer(uri, "Countries", "ogr")

for field in vlayer.fields():
        print(field.name())
```

In conclusion, this article provides a helpful guide on how to retrieve information about the fields of a vector layer in QGIS using the *fields()* function. The article is suitable for both GIS professionals and beginners who are looking to better understand how to work with vector layers in QGIS. By following the steps outlined in the article, users can easily extract useful information about the fields of a vector layer in QGIS.

> If you like the content, please [SUBSCRIBE](https://www.youtube.com/channel/UCpbWlHEqBSnJb6i4UemXQpA?sub_confirmation=1) to my channel for the future content
I rebuilt my blog using Next.JS and Tailwind
Tags: nextjs, tailwindcss, webdev, blog
Published: 2023-03-24 07:54:24

I recently decided to rebuild my blog/portfolio website which previously ran on Django. This time, I opted to use Next.JS and Tailwind instead. Surprisingly, it was very easy to keep the Django admin running on the same droplet (I'm using DigitalOcean for hosting), and have it run only for certain URLs.

I would love to hear your opinions on the final result! You can check it out at [claritydev.net](https://claritydev.net).
Enzyme vs React Testing Library: A Migration Guide
Tags: enzyme, react, testing, javascript
Published: 2023-03-24 07:42:30

This blog post provides a basic comparison of both libraries and presents a migration guide based on code samples from each library. We'll write tests for the Tic-Tac-Toe game from an earlier post using Enzyme and then transform them into React Testing Library tests.

[Enzyme vs React Testing Library: A Migration Guide](https://claritydev.net/blog/enzyme-vs-react-testing-library-migration-guide)
Elder Millennial tries to get an actual career.
Published: 2023-03-24 06:54:56

While the labels that society places on the generations are a little silly, it’s what I am, so here we are. I started my “blogging career” back when LiveJournal / DeadJournal was a big thing. I loved the control you could have in designing how everything looked. Xanga, melodramatic, blogger and finally the both dreaded and loved Tumblr. Whatever blog site was popular I moved over to until I moved over to <a href="https://lifebymistakes.wordpress.com/">wordpress</a> (head there if you want a more everyday-type blog), but I'm here in DEV. I guess I'll see how this works for me. </p>
Myspace happened the year after I graduated high school in 2003. Between the drama of who was in my top 8 all I wanted to do was code and design, and create. I went down the rabbit hole and taught myself any and everything I could about html/css, I bought photoshop and dreamweaver and learned how to design and code using it’s WYSIWYG interface. I went to college for “ graphic design” that had very few graphic courses and so many coding courses where I learned how to make FLASH games and design websites. I LOVED IT. That was almost 20 years ago. I never got that job as a designer, although I did have some freelance jobs doing posters and websites for local bands. Everything has changed since then though, so has coding languages.

So here I am. I’ve worked overnights at Amazon for the last 6 years, and while I love what I do – I basically get to tell people what to do all night and make sure we get all your shipments out on time – I’ve never been ‘fulfilled.’ haha.

Thanks to Amazon’s career choice I’m starting an 8 month program to become a software developer. There is so much more going on in my life, and while I will mainly focus on my career journey, I hope you don’t mind joining me in my everyday adventures as well.
ChatGPT plugins
Tags: chatgpt, data, extensions, plugins
Published: 2023-03-24 07:12:52

OpenAI is advancing too quickly. Support for plugins, or extensions, has been added to ChatGPT, enabling it to access current data or interact with outside services.

To enable ChatGPT to look through your internal documents and respond to inquiries, you can create a plugin. #data

source code: https://github.com/openai/chatgpt-retrieval-plugin

[Demo Video](https://cdn.openai.com/chat-plugins/retrieval-gh-repo-readme/Retrieval-Final.mp4)
What is Override And Extensions
Tags: overridin, laravel, php, beginners
Published: 2023-03-24 07:07:34

In object-oriented programming, overriding and extensions are common concepts that allow developers to modify or enhance the behavior of existing classes or methods. In this article, we'll explore these concepts in the context of PHP, with examples to demonstrate their usage.

**1. Overriding in PHP**

Overriding is the process of redefining a method in a subclass that was already defined in the parent class. This allows the subclass to provide its own implementation of the method, which may be different from the parent class.

Consider the following example:

```
class Animal {
  public function makeSound() {
    echo "The animal makes a sound";
  }
}
```

```
class Cat extends Animal {
  public function makeSound() {
    echo "Meow!";
  }
}
```

```
$cat = new Cat();
$cat->makeSound(); // Outputs "Meow!"
```

In this example, we have a base class `Animal` that defines a `makeSound()` method. The `Cat` class extends `Animal` and `overrides` the `makeSound()` method with its own implementation that outputs `Meow!`.

When we create an instance of `Cat` and call `makeSound()`, the overridden implementation in `Cat` is executed instead of the one in `Animal`.

**2. Extensions in PHP**

Extensions, also known as `method chaining`, is a technique that allows developers to add functionality to an object by chaining method calls together. This can make code more concise and easier to read.

Consider the following example:

```
class Car {
  private $model;

  public function setModel($model) {
    $this->model = $model;
    return $this;
  }

  public function setColor($color) {
    $this->color = $color;
    return $this;
  }

  public function setYear($year) {
    $this->year = $year;
    return $this;
  }
}

$car = new Car();
$car->setModel("Tesla")
    ->setColor("Red")
    ->setYear(2022);

```
In this example, we have a `Car` class with three setter methods that set the `model, color, and year` properties of the car. Each method returns `$this`, allowing the methods to be chained together.

When we create a new instance of `Car` and call the setter methods, we can chain them together to set all three properties in a single line of code.

In PHP, `overriding` and `extensions` are powerful techniques that allow developers to modify or enhance the behavior of existing classes or methods. By understanding these concepts and using them effectively, you can write more flexible and maintainable code.
How Do You Prioritize UX in Software Development?
Tags: discuss, beginners, codenewbie
Published: 2023-03-24 07:00:00

We all know how important user experience is in software development. But with so many competing priorities, it can be tough to keep it at the forefront. What is your experience with OR approach to incorporating UX into your projects, and how do you prioritize the following?

1. User research
2. User personas
3. Usability testing
4. Design thinking
5. Continuous feedback
6. Iteration
Animation -15 : CSS PB JLoader Animation
Tags: css, javascript, animation, design
Published: 2023-03-24 06:48:29

Are you looking for animations to enhance your website? We've got you covered with our wide selection of creative and engaging #animations. Say goodbye to endless searching and hello to seamless integration on your website!

#### We're excited to introduce our latest YouTube series, which features diverse creative and inspiring website animations.

---

In our short videos, you'll find a variety of #animations that can be easily implemented on your website to enhance user experience.


---

### Simple Content Preload CSS Animation 

---

{% youtube ZpxFwB06Re0 %}

 ---
### [Source code](https://democoding.netlify.app/loaders/css-pb-jloader-animation)


---
## For more information

1. Check my GitHub profile
[https://github.com/amitSharma7741](https://github.com/amitSharma7741)

2. Check out my Fiver profile if you need any freelancing work
[https://www.fiverr.com/amit_sharma77](https://www.fiverr.com/amit_sharma77)

3. Check out my Instagram
[https://www.instagram.com/fromgoodthings/](https://www.instagram.com/fromgoodthings/)

4. Check out my Facebook Page 
[Programming memes by Coder](https://www.facebook.com/programmingmemesbycoders)

5. Linktree
[https://linktr.ee/jonSnow77](https://linktr.ee/jonSnow77)

6. Check my project

- EVSTART: Electric Vehicle is the Future
[https://evstart.netlify.app/](https://evstart.netlify.app/)
-  News Website in react
 [https://newsmon.netlify.app/](https://newsmon.netlify.app/)
-  Hindi jokes API
 [https://hindi-jokes-api.onrender.com/](https://hindi-jokes-api.onrender.com/)
- Sudoku Game And API
[https://sudoku-game-and-api.netlify.app/](https://sudoku-game-and-api.netlify.app/)

---
---
Install and configure mysql in ubuntu 20.04
Tags: mysql, ubuntu, configure, install
Published: 2023-03-24 06:40:41

Please follow step by step command

```
sudo apt update
sudo apt install mysql-server
```
After installation please follow below steps:

```
sudo mysql
```

Now update the native plugin for root user

```
USE mysql;
```

```
UPDATE user SET plugin='mysql_native_password' WHERE User='root';
```

```
FLUSH PRIVILEGES;
```

Now change the password using below commands:

```
ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password_here';
```

Now restart your mysql service

```
sudo service mysql restart
```

Run below command to connect mysql workbench to work correctly

```
sudo snap connect mysql-workbench-community:password-manager-service
```

```
sudo snap connect mysql-workbench-community:ssh-keys
```
HTML CSS 基礎 Part 03 -- CSS のみでアコーディオンを作る
Tags: html, css
Published: 2023-03-24 06:24:53


## why

figma のようなアコーディオンの質問回答のセットを作りたかった。
JS を使えば簡単そうだった。
しかし、なぜか JS が読み込めなかった。
調査すると、CSS のみでも実装できるようだった。
なので、CSS のみで実装して、要点を書き残しておく。

---

## 結論

```
* div
  * input checkbox #accordion__input
  * label ( question )
  * content ( answer ) #accordion__content
```

このセットで作れば、CSS のみで開閉機能を実装できた。

```css
.accordion__content{
    display: none;
    /* デフォルトで回答を隠す */
}
.accordion__input:checked ~ .accordion__content{
    display: flex;
    /* チェックされた時に回答を flex 表示 */
}
```

このように　CSS の　if 文もどきを使う。
すると、このような動作になる。

1. 質問文はデフォルトで非表示になっている
2. 質問文(ラベル)がクリックされる
3. 内部のインプットチェックボックスにチェックが入る
4. 同じ div の中にある質問文が表示状態になる。これにより、中身が開いたように見える。
5. 質問文(ラベル)が再度クリックされる
6. インプットのチェックが外れると、質問文が非表示に戻る。これにより、中身が閉じられたように見える。
WSL change LocalState path
Tags: wsl, windows
Published: 2023-03-24 06:05:21

1. List the ditros you have
`wsl -l -v`
2. Change the directory to a folder with space to export the distro and then use command:
`wsl --export <Distro-name> <filename.tar>`
3. Unregister the old distro
`wsl --unregister <Distro-name>`
4. Import again with a different install path. The import command syntax is :
```
    --import <Distro> <InstallLocation> <FileName> [Options]
        Imports the specified tar file as a new distribution.
        The filename can be - for standard input.

        Options:
            --version <Version>
                Specifies the version to use for the new distribution.

            --vhd
                Specifies that the provided file is a .vhdx file, not a tar file.
                This operation makes a copy of the .vhdx file at the specified install location.
```
Comand to import:
`wsl --import <Distro-name> <InstallLocation> <filename.tar>`

Additional
Sample `.wslconfig` to be placed in User home

```
# Settings apply across all Linux distros running on WSL 2
[wsl2]
# Limits VM memory to use no more than 4 GB, this can be set as whole numbers using GB or MB
# memory=4GB
# Sets the VM to use two virtual processors
# processors=2
# Specify a custom Linux kernel to use with your installed distros. The default kernel used can be found at https://github.com/microsoft/WSL2-Linux-Kernel
# kernel=C:\\temp\\myCustomKernel
# Sets additional kernel parameters, in this case enabling older Linux base images such as Centos 6
# kernelCommandLine = vsyscall=emulate
# Sets amount of swap storage space to 8GB, default is 25% of available RAM
swap=8GB
# Sets swapfile path location, default is %USERPROFILE%\AppData\Local\Temp\swap.vhdx
swapfile=D:\\WSL\\wsl-swap.vhdx
# Disable page reporting so WSL retains all allocated memory claimed from Windows and releases none back when free
# pageReporting=false
# Turn off default connection to bind WSL 2 localhost to Windows localhost
# localhostforwarding=true
# Disables nested virtualization
# nestedVirtualization=false
# Turns on output console showing contents of dmesg when opening a WSL 2 distro for debugging
debugConsole=false
kernelCommandLine = "sysctl.vm.swappiness=100"
```
How To Manage DateTime with Carbon in Laravel and PHP
Tags: laravel, php, beginners, tutorial
Published: 2023-03-24 05:55:57

Welcome to **#DevelopersLab101**

---
Laravel is a popular PHP web application framework that provides a powerful set of tools for building scalable and robust web applications. One of the many great things about Laravel is its vast ecosystem of packages that can be easily integrated into your application. In this blog, we will discuss the Carbon package in Laravel.

Carbon is a PHP library for working with dates and times. It provides an easy-to-use and intuitive API for manipulating dates and times. Laravel has integrated the Carbon package into its core, allowing developers to easily work with dates and times in their applications.

## Installation

To start using the Carbon package in Laravel, you first need to install it using Composer. Open your terminal or command prompt and run the following command:

`composer require nesbot/carbon`

Once the package is installed, you can start using it in your Laravel application.

## Usage

To use the Carbon package in your Laravel application, you first need to import it into your PHP file using the `use` keyword:

`use Carbon\Carbon;`

Now, you can create a new instance of Carbon by calling its constructor:

`$date = new Carbon('2022-03-24 15:30:00');`

You can also create a Carbon instance using the `now()` method, which creates an instance with the current date and time:

`$date = Carbon::now();`

Carbon provides a wide range of methods for manipulating and formatting dates and times. Here are some examples:

```
// Add 1 day to the date
$date->addDay();

// Subtract 1 hour from the time
$date->subHour();

// Format the date as a string
echo $date->format('Y-m-d H:i:s');

// Get the day of the week
echo $date->dayOfWeek;
```

Carbon also provides several useful shortcuts for working with dates and times. For example, you can easily get the start and end of the day, week, month, or year:

```
// Get the start of the day
echo $date->startOfDay();

// Get the end of the month
echo $date->endOfMonth();
```

## Conclusion

The Carbon package is an excellent addition to Laravel's core, providing a powerful and intuitive API for working with dates and times. Whether you need to format a date, add or subtract time, or perform more advanced manipulations, Carbon has you covered. With its vast range of features and easy-to-use syntax, Carbon is a must-have package for any Laravel developer.


[Twitter](https://twitter.com/mesayandeep) | [LinkedIn](https://www.linkedin.com/in/connectwithsayandeep/) | [Github](https://github.com/sayandeepmajumdar) | [Web](https://sayandeepmajumdar.github.io/)
O que são indexes de bancos de dados e quando pode ser útil em nossa aplicação?
Published: 2023-03-24 05:55:31

Os bancos de dados são uma das principais ferramentas usadas para armazenar e gerenciar grandes quantidades de dados. No entanto, à medida que a quantidade de dados armazenados aumenta, a eficiência do acesso aos dados pode diminuir. É aí que os índices de banco de dados entram em cena.

Índices de banco de dados são estruturas de dados usadas para acelerar as consultas em um banco de dados. Eles funcionam como um índice de um livro, ajudando a localizar rapidamente informações específicas em um grande conjunto de dados.

Quando uma consulta é executada em um banco de dados sem um índice, o banco de dados precisa percorrer todas as linhas da tabela em busca da resposta. Isso pode levar muito tempo, especialmente se a tabela tiver muitas linhas. No entanto, quando um índice está presente, o banco de dados pode usar o índice para localizar rapidamente as informações necessárias e recuperá-las mais rapidamente.

Por exemplo, se tivermos uma tabela de vendas com milhões de registros e quisermos obter informações sobre as vendas realizadas por um determinado vendedor, podemos criar um índice na coluna que armazena o ID do vendedor. Isso tornará a consulta muito mais rápida e eficiente, já que o banco de dados poderá usar o índice para localizar rapidamente os registros que correspondem ao ID do vendedor que estamos procurando, sem precisar examinar cada linha da tabela.

Outro exemplo é quando precisamos localizar rapidamente os registros que atendem a um determinado critério de pesquisa, como encontrar todos os registros que possuem um determinado valor em uma coluna específica. Nesse caso, podemos criar um índice na coluna relevante para acelerar a busca e melhorar o desempenho geral do banco de dados.

Os índices de banco de dados podem ser criados em uma ou mais colunas de uma tabela. Eles são criados para aumentar a velocidade de uma consulta específica, portanto, os índices devem ser criados com base nas consultas mais comuns que serão executadas no banco de dados. Se um índice não estiver sendo usado, ele pode realmente diminuir a velocidade do banco de dados, pois o banco de dados precisa atualizar o índice sempre que a tabela é atualizada.

Os índices de banco de dados são mais eficazes em tabelas grandes e complexas, onde a velocidade de consulta é crítica. No entanto, em tabelas menores e mais simples, os índices podem não ser necessários.

Para utilizar os índices de banco de dados da melhor forma possível, é importante entender as consultas que serão executadas com mais frequência e criar índices com base nessas consultas. É também importante monitorar o desempenho do banco de dados e ajustar os índices conforme necessário.

Em resumo, os índices de banco de dados são ferramentas valiosas que ajudam a aumentar a eficiência do acesso aos dados em um banco de dados. Eles devem ser criados com base nas consultas mais comuns e monitorados regularmente para garantir que estejam funcionando corretamente e não afetando negativamente o desempenho do banco de dados.
AVL Tree
Tags: datastrutures, cpp, python
Published: 2023-03-24 05:38:33

In this tutorial, you will learn what an avl tree is. Also, you will find working examples of various operations performed on an avl tree in C++ and Python.

AVL tree is a self-balancing binary search tree in which each node maintains extra information called a balance factor whose value is either -1, 0 or +1.

AVL tree got its name after its inventor Georgy Adelson-Velsky and Landis.

---
## Balance Factor
Balance factor of a node in an AVL tree is the difference between the height of the left subtree and that of the right subtree of that node.

Balance Factor = (Height of Left Subtree - Height of Right Subtree) or (Height of Right Subtree - Height of Left Subtree)

The self balancing property of an avl tree is maintained by the balance factor. The value of balance factor should always be -1, 0 or +1.

---
#**Python:**

{% embed https://gist.github.com/CodeNinjaUsman/5850429b1ef7d188bd2a5b241f524aa1 %}

#**C++:**

{% embed https://gist.github.com/CodeNinjaUsman/f3e4bf103acd7f0122fdce9f6467b4f9 %}


---
## Complexities of Different Operations on an AVL Tree

![Complexity](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/oe71sp4fwiyfpb2wfw7n.png)

---
## AVL Tree Applications

- For indexing large records in databases
- For searching in large databases