teleren/devto huggingface dataset:
12章７４
Published: 2024-05-20 23:14:54

このJavaのプログラムは、以下のことを試みています。しかし、コードにはいくつかの問題があり、期待される動作は実現できません。

1. `String[] str`配列をサイズ2で初期化します。
2. 各要素に対して、"e" + インデックス番号の文字列を結合しようとしていますが、これが正しく動作しません。

以下に、コードの各部分にコメントを付けて説明します。

```java
public class Main {
    public static void main(String[] args) {
        // 文字列の配列をサイズ2で初期化
　　　　　　　　　　　　　　 //下記の２つのインスタンスがつくられる。
        // str[0] -> null
        // str[1] -> null
        String[] str = new String[2];
        int i = 0;

        // 配列の各要素に "e" + インデックス番号を結合するループ
        for (String s : str) {
            // str[i]に "e" + i を結合（実際にはこの操作は何も行わない）
            str[i].concat("e" + i);
            i++;
        }

        // 配列の各要素を出力するループ
        for (i = 0; i < str.length; i++) {
            System.out.println(str[i]); // すべての要素はnullのまま
        }
    }
}
```

### 問題点
1. `str[i].concat("e" + i);`は文字列を結合しますが、`str[i]`自体は変更されません。文字列はイミュータブル（不変）なので、`concat`メソッドは新しい文字列を返しますが、元の`str[i]`を変更するわけではありません。
2. `String[] str`は初期化時点では各要素がnullなので、`str[i].concat("e" + i);`を呼び出すと`NullPointerException`が発生します。

### 修正方法
以下のように修正すると、正しく動作します。

```java
public class Main {
    public static void main(String[] args) {
        // 文字列の配列をサイズ2で初期化

        String[] str = new String[2];
        int i = 0;

        // 配列の各要素に "e" + インデックス番号を代入
        for (int j = 0; j < str.length; j++) {
            str[j] = "e" + j;
        }

        // 配列の各要素を出力するループ
        for (i = 0; i < str.length; i++) {
            System.out.println(str[i]); // 正しく "e0" と "e1" が出力される
        }
    }
}
```

この修正により、配列の各要素に"e"とインデックス番号を結合した文字列が代入され、期待通りの出力が得られます。
1863. Sum of All Subset XOR Totals
Published: 2024-05-20 22:43:59


https://leetcode.com/problems/sum-of-all-subset-xor-totals/?envType=daily-question&envId=2024-05-20

```js
/**
 * @param {number[]} nums
 * @return {number}
 */
var subsetXORSum = function(nums) {
    let sum = 0

    for (let num of nums) {
        sum |= num
    }

    return sum * (1 << (nums.length - 1))
};

```
Considering Opening a Gaming Business in Anjouan, but Navigating Legal Hurdles Seems Daunting
Published: 2024-05-20 22:38:54

Hey, fellow gaming enthusiasts! I've been toying with the idea of launching a gaming business on the beautiful island of Anjouan, known for its breathtaking landscapes and vibrant culture. However, navigating the legal intricacies of registration makes me feel a bit apprehensive.

Anjouan's potential as a gaming hub is undeniable, with a growing market of eager gamers and a thriving tourism industry. Yet, the prospect of dealing with legal registration processes, licensing requirements, and regulatory frameworks feels like venturing into uncharted territory.

I'm eager to bring my gaming vision to life and contribute to Anjouan's emerging gaming scene. Still, I could use some advice and guidance from those who have successfully tackled the legal hurdles of setting up a gaming business in a similar environment.

If you've been through a similar journey or have insights about the legal aspects of launching a gaming venture in Anjouan, I'd love to hear from you! Let's join forces, share our experiences, and navigate the legal maze together as we embark on this exciting gaming adventure in Anjouan!
Estruturas de repetição em GDScript
Tags: godot, godotengine, gdscript, gamedev
Published: 2024-05-20 22:14:13

## Introdução a Laços de Repetição em GDScript
Os laços de repetição ou estruturas de repetição ou loops, são fundamentais em qualquer linguagem de programação. 
Eles servem para executar blocos de código repetidas vezes, com base em uma condição específica. 

**Por que usar laços de repetição?**
Experimente printar na tela todos os números ímpares de 1 até 1 milhão. Talvez pareça cansativo, não é?
Bom, os laços de repetição são essenciais justamente para automatizar códigos que precisam ser executados várias vezes. 

Em GDScript, existem principalmente dois tipos de laços: o **for** loop e o **while** loop.

**_For_**
O loop for é usado quando se sabe previamente quantas vezes um bloco de código precisa ser executado. Ele itera sobre uma sequência de elementos, como um array (lista) ou uma faixa de números.
Exemplo:
```
for i in range(10):
    print("O valor de i é:", i)
```
Neste exemplo, o loop for executa o bloco de código 10 vezes, uma para cada valor de i na faixa de 0 a 9. **Sim, o primeiro valor é zero.** Isso se chama "indexado por zero" ou "zero based indexing".

**_While_**
O loop while é utilizado quando a condição para continuar executando o bloco de código não é conhecida antecipadamente, e é avaliada a cada iteração.
Exemplo:
```
var contador = 0
while contador < 5:
    print("Contagem:", contador)
    contador += 1
```
Neste exemplo, o bloco de código dentro do loop while é executado enquanto a variável contador for menor que 5. A cada iteração, o valor de contador é incrementado, garantindo que o loop eventualmente termine.

**Ok, mas... _e daí?_**
Com exemplos de números ímpares ou contar de zero à dez, laços de repetição realmente podem não parecer muito úteis. Mas imagine o seguinte cenário:
Em seu jogo, você colocou todas as suas moedas de ouro em um grupo chamado "gold_coins". Agora que você sabe o que é um laço de repetição, você pode acessar cada uma dessas moedas de ouro e... fazer o que quiser com elas!
Are you still exposing your Django SECRET_KEY?
Tags: python, django
Published: 2024-05-20 22:05:27



Django `settings.py` contains the most sensitive information of your project. Hard coding key details such as `SECRET_KEY`,`ALLOWED_HOSTS`, database settings such `database password`, `database host`, `database port`, `database username` in your codebase is a security risk. In this article, we will discuss how to secure your Django `SECRET_KEY` by using environment variables and the python `dotenv` library. While I will focus on the `SECRET_KEY`, the same principles can be applied to other sensitive information in your Django project.

## Why is the Django `SECRET_KEY` important?

Django uses the `SECRET_KEY` to provide cryptographic signing, protection against CSRF attacks, and other security features. If an attacker gains access to your `SECRET_KEY`, they can potentially compromise the security of your Django project. It is crucial to keep the `SECRET_KEY` confidential and secure.

## Installing the `python-dotenv` library

The `python-dotenv` library allows you to load environment variables from a `.env` file into your Django project. To install the `python-dotenv` library, you can use `pip`:

```bash
pip install python-dotenv
```

If you do have a `requirements.txt` file, you can add the `python-dotenv` library to it.

## Creating a `.env` file

Create a `.env` file in the root directory(the same directory as manage.py) of your Django project. Add the `SECRET_KEY` to the `.env` file in the following format:

```bash
SECRET_KEY="your_secret_key_here"
```

## Adding the `.env` file to `.gitignore`

The `.env` file contains sensitive information, and you should not commit it to your version control system. To prevent the `.env` file from being accidentally committed, add it to your `.gitignore` file. Here is an example of how you can add the `.env` file to your `.gitignore` file:

```bash
# .gitignore
.env
```

## Loading the `SECRET_KEY` from the `.env` file

In your `settings.py` file, you will need to import the `os` and `dotenv` modules and load the `SECRET_KEY` from the `.env` file. Here is an example of how you can do this:

```python
import os
from dotenv import load_dotenv

load_dotenv()
```

`load_dotenv()` will load the environment variables from the `.env` file into your Django project. After reading from the .env file, `load_dotenv()` will update the `os.environ` dictionary with the key-value pairs from the .env file.

* It is important to call `load_dotenv()` before accessing the `SECRET_KEY` in your `settings.py` file.

## Accessing the `SECRET_KEY` in your `settings.py` file

Now that you have loaded the `SECRET_KEY` from the `.env` file, you can access it in your `settings.py` file using the `os` module:

```python
SECRET_KEY = os.getenv('SECRET_KEY')
```

By using `os.getenv('SECRET_KEY')`, you can access the `SECRET_KEY` value stored in the `.env` file. This ensures that the `SECRET_KEY` is not hard-coded in your codebase and is kept secure.

Please note the above steps can be applied to other sensitive information in your Django project.

Happy coding! 🚀🐍
Estruturas condicionais em GDScript
Tags: godotengine, godot, gdscript, gamedev
Published: 2024-05-20 21:51:02

**E se**... eu te explicar o que são... 
## estruturas condicionais

As estruturas condicionais são fundamentais na programação. Elas permitem que um programa tome decisões com base em uma ou mais condições específicas. Elas não são menos importantes enquanto desenvolvendo jogos.

**O que são Estruturas Condicionais?**
Estruturas condicionais são blocos de código que permitem que o programa execute diferentes ações com base em condições específicas. Elas avaliam _expressões booleanas_ e executam o código associado apenas se a condição for verdadeira. 
Ou seja: faremos uma pergunta que deve apenas ser respondida com **verdadeiro** _ou_ **falso** (isso é aquela tal de expressão booleana). Podemos então criar códigos que serão executados apenas se a resposta for verdadeira. Ou falsa. Ou ambos!

**Estruturas Condicionais em GDScript:**
**_If_**
O if é a estrutura condicional mais básica em GDScript. 
Ele é quem fará a pergunta (expressão booleana) e executará o bloco de código associado se a condição for verdadeira. Se a condição for falsa, o bloco de código dentro do if não será executado.

Exemplo:
```
var health = 10

if health <= 0:
    print("Eu morri...")
```
Note que o código `print("Eu morri...")` só executará se a condição (a vida ser menor ou igual a zero) for **verdadeira**. Senão, o código dentro do bloco if será ignorado.

**_Else_**
O else permite que você execute um bloco de código se a condição for verdadeira e outro bloco de código se a condição for falsa. Isso é útil quando temos duas possibilidades.

Exemplo:
```
var health = 10

if health <= 0:
    print("Eu morri...")
else:
    print("Estou vivo!")
```
Note que o código `print("Estou vivo!")` só executará se a condição (a vida ser menor ou igual a zero) for **falsa**. Else literalmente significa "senão".

**_Elif_**
O elif é utilizado quando há múltiplas condições. Ele permite uma sequência de verificações.

Exemplo:
```
var health = 10

if health < 0:
    print("Eu morri...")
elif health == 0:
    print("Eu morri... mas foi por pouco!")
else:
    print("Estou vivo!")
```
Note que agora verificamos se a vida é menor do que zero e além disso também verificamos se ela é exatamente zero. Cada _print statement_ será executado de acordo com o resultado das expressões booleanas.
É importante notar que assim que a primeira condição for verdadeira, todas as outras verificações serão **ignoradas**!

Entender como utilizar corretamente o if, elif e else permite que você controle o fluxo de execução do seu jogo de maneira eficiente e criar múltiplos comportamentos.
Boas Práticas nomeando variáveis e funções em GDScript
Tags: godot, gdscript, godotengine, gamedev
Published: 2024-05-20 21:29:17

## Nomeando variáveis e funções - GDScript
Na hora de nomear _variáveis_ e _funções_ em **GDScript**, adotar boas práticas não só torna o código mais legível, mas também facilita a **manutenção** e colaboração com outros desenvolvedores. A escolha de nomes claros e descritivos pode fazer toda a diferença na compreensão do propósito de cada elemento do código. 
Deixarei aqui algumas dicas que costumo seguir ao escrever meus códigos:

**Clareza e _(principalmente)_ Descritividade:**
Os nomes devem ser claros e descritivos, refletindo o propósito e o contexto da variável ou função.
Sem abreviações obscuras, como _"pHealth"_ ou siglas pouco intuitivas, como _"x"_ ou _"y"_. 
Opte por nomes completos que transmitam claramente a intenção, como: _"player_health"_.

**Convenções de Nomenclatura:**
Use o padrão _snake_case_ para nomes de _variáveis_ e _funções_, onde as palavras são separadas por underline (como no exemplo de _"player_health"_).

**Consistência:**
Mantenha todo o código consistente. Isso torna mais fácil para os desenvolvedores entenderem o projeto.
Seja consistente com a escolha de nomes para tipos semelhantes de variáveis ou funções. 
Por exemplo, a variável de vida do inimigo não deve ser chamada de _"enemy_life_points"_ enquanto a do jogador é _"player_health"_.
Bom, idealmente nem precisaríamos do prefixo _"player"_ ou _"enemy"_...

**Evite Nomes Genéricos:**
Nomes genéricos como "temp", "data", "index" etc. 

**Não comente:**
Sim. É isso mesmo. Mas não me refiro a todo tipo de comentário. 
É claro que há bons comentários e péssimos comentários. Geralmente, não precisamos de uma explicação do que a função _physics_process faz.
Um bom comentário explica efeitos colaterais de uma função. O nome da função já deve ser suficiente para explicar sua responsabilidade.
Hello! Why are we here?
Published: 2024-05-20 21:17:38

I can't allow myself to write my first post here without saying: `hello world!`. This post is just a self introduction, if you're looking for anything technical then please skip to the next one.

Now that that's out of the way, let's talk about the title. I have no idea why you are here - I bet you have work to do but prefer doing anything but that. Yeah, we've all been there. But in a way, it's also what I'm doing while writing this, so I'm not judging.

Anyway, that's not why I am here. The reason I'm here is because I decided that I want create stuff. Feel free to call it "build in public" if you want.

I am currently working on a few different projects, and I plan on using this blog to post updates about what I'm doing (concepts) or things (tech/tools) that I am using. Follow me if you want to tag along, I believe it'll be fun.

Cheers!
Ultimate Guide to Using OG Pro WhatsApp
Published: 2024-05-20 21:10:29

WhatsApp has been in the market for over a decade, but there are still limitations and restrictions after so many updates. With those restrictions and limitations in place, [OG Whatsapp pro APK ](https://ogbwhats.com/)is the perfect answer with a clean interface and a lot of personalization features. In this blog, I will get into every detail of how to download, how to install, and all the features available so that no query remains unanswered. Official Brand is: https://ogbwhats.com/

**## Customization Features:**

Image Background: You can set an image as background both on the chat screen as well as on the main screen.

Unread Messages: You can change the unread messages colour and background of unread messages and you can highlight them as well.

Contacts: There are a lot of customization features of contacts. For example, you can change the colour of contacts and contact statuses. You can hide the contact’s name if you want to. You can use an emoji in place of a contact’s name without the need to change the name in your phone contacts. A specific notification tone and a specific notification light can be set up for a specific contact. Isn’t it amazing? You know right away whose text it is without having to pick up your phone.

Themes: Now, with this latest version of OG Whatsapp you will now have access to themes. From the themes menu, you can easily choose a theme of your choice, and it will change the main screen, conversation screen, and status screen for better clarity, and it will be tailored according to your taste.

Stickers: There is a whole library of stickers available. Select stickers, and then you will find different categories, and there you can find different stickers. If you still don’t find them according to your liking, there is also a search option so that you will find the one you are looking for.

Emojis: Emojis have been the essence of our chats since they were introduced. Our text messages are incomplete without them. There is an immense collection of different emojis. You can send these in different sizes.

Gifs: Imagine you are having a conversation with your dear ones, and you find the gifs to convey your emotions to them in the best possible way, where simple text messages do not make a significant impact. You will have access to thousands of gifs so that you will have impactful conversations with your loved ones.

Icons: There are several different icon options available. Some are rounded, some are squared, and some are oval. You can choose one from a lot of options available.

Fonts: Exclusive and unique fonts are available, and you can select the one you find suits you.

Custom Wallpaper: This is a feature that allows the users to select a different wallpaper for different contacts. In this way, users can have a personalised experience with their contacts.

Night Mode: This feature will help you rest your eyes with relatively dim colours and accents.

Widgets: You can create widgets and customize their colours, designs, and fonts according to your choice.
AI Friend Simulator - Meta Friends
Published: 2024-05-20 19:48:42

Imagine having that friend who knows you better than you know yourself. They're the ones who can finish your sentences and anticipate your next move. With their uncanny ability to see the world through your eyes, they offer advice that's not just helpful, but tailor-made for you! It's like having a personal cheerleader and life coach rolled into one. 

In a world where friendships can sometimes feel superficial, https://metafriends.world are the real deal.  Metafriends aren't just your average online buddies; they're companions on a journey of self-discovery and growth. They're the ones who understand you on a deeper level, intuitively grasping your passions, dreams, and quirks. It's as if they hold a mirror to your soul, reflecting back the essence of who you are.

What sets Metafriends apart, is their unique ability to curate experiences that resonate with your heart and mind. They're like personal guides, navigating the vast expanse of the digital world to uncover hidden treasures of knowledge, inspiration, and community. With Metafriends by your side, every interaction becomes an opportunity for growth and enrichment.

They're the ones who remind you that true friendship isn't just about having fun together; it's about lifting each other up and helping each other grow. So if you're lucky enough to have a meta friend in your life, hold onto them tight. They're the kind of friend everyone deserves.

Join us on a journey of connection and empowerment. Together, we'll unlock the true potential of Metafriends and create a digital landscape filled with genuine, enriching relationships. Let's embark on this adventure together, forging bonds that transcend boundaries and redefine the meaning of friendship in the digital age.

Ready to Dive In? Any eager soul can reach out to us and receive an invitation to test the first version of our app! Just drop us a message here  and let's embark on this exciting journey together! https://forms.gle/PGWn3ujvqGWikmvF6

Stay tuned for the latest updates.
Transformer Tabs
Tags: codepen, typescript
Published: 2024-05-20 21:02:18

RWD n stuff!

One set of semantic HTML. One set of JS.

Tabs that turn into a small-screen-capable tap-to-reveal fully-functional system. 

I used to use `&lt;select>` sometimes for this but that's different markup and different JS and that sucks. Plus this is easier (funner) to style.

{% codepen https://codepen.io/chriscoyier/pen/nBPggM %}
🔥 ORNAZ: The E-Commerce Revolution is Here! 💯⚡️ Say Goodbye to Slow Websites!
Tags: websiteperformance, seoboost, ecommerceoptimization, frontend
Published: 2024-05-20 20:53:52


🚀 Tired of waiting for slow-loading websites? So were we!

That's why we got obsessed with creating something better at ORNAZ! 💡 We've transformed our e-commerce platform into an ultra-fast, SEO-friendly powerhouse! And the result? A jaw-dropping 100/100 on Lighthouse scores! ⚡️

 
Surprised? Wait till you hear this - we achieved all this with only 2 amazing developers! 😱
 
Even giants like Flipkart and Amazon are struggling at 75-80, but we've set a new standard! Say goodbye to slow loading times and hello to the future of online shopping! Check it out for yourself! (attachment).

Go and experience it yourself at [ORNAZ](https://www.ornaz.com/) desktop version.

<img src="https://www.ashutoshverma.com//assets/img/ornaz-lighthouse/ornaz_2.png" />
<img src="https://www.ashutoshverma.com//assets/img/ornaz-lighthouse/ornaz_3.png" />
<img src="https://www.ashutoshverma.com//assets/img/ornaz-lighthouse/flipkart.png" />
<img src="https://www.ashutoshverma.com//assets/img/ornaz-lighthouse/amazon.png" />
Setting up GitHub SSH on Linux
Published: 2024-05-20 20:53:38

Setting up GitHub SSH on Linux is a great way to securely manage your repositories. Here’s a step-by-step guide to help you set it up:

### Step 1: Check for Existing SSH Keys

First, you need to check if you already have an SSH key:

```bash
ls -al ~/.ssh
```

If you see files like `id_rsa` and `id_rsa.pub`, you already have an SSH key.

### Step 2: Generate a New SSH Key

If you don't have an SSH key, you can generate a new one:

```bash
ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
```

- **`-t rsa -b 4096`**: Specifies the type of key and bit length.
- **`-C "your_email@example.com"`**: Adds a comment with your email.

You'll be prompted to save the key to a specific file location. Press Enter to accept the default location (`/home/your_username/.ssh/id_rsa`). Next, you'll be asked to enter a passphrase for added security (optional but recommended).

### Step 3: Add SSH Key to the SSH Agent

Start the SSH agent:

```bash
eval "$(ssh-agent -s)"
```

Add your SSH private key to the SSH agent:

```bash
ssh-add ~/.ssh/id_rsa
```

### Step 4: Add SSH Key to Your GitHub Account

1. Copy your SSH key to the clipboard:

   ```bash
   cat ~/.ssh/id_rsa.pub
   ```

2. Log in to your GitHub account.
3. Go to **Settings** -> **SSH and GPG keys**.
4. Click **New SSH key**.
5. Enter a descriptive title, and paste your SSH key into the "Key" field.
6. Click **Add SSH key**.

### Step 5: Test Your SSH Connection

To verify that your setup is working, run:

```bash
ssh -T git@github.com
```

You should see a message like this:

```text
Hi your_username! You've successfully authenticated, but GitHub does not provide shell access.
```

### Step 6: Configure Git to Use SSH

Finally, make sure your Git configuration uses the SSH URL for GitHub. When cloning repositories, use the SSH link:

```bash
git clone git@github.com:username/repository.git
```

And that’s it! Your GitHub SSH setup on Linux is complete. Now you can securely manage your repositories with ease. If you have any questions or run into any issues, feel free to ask!
BTC RECOVERING
Tags: webdev, javascript
Published: 2024-05-20 19:46:53

I don't think I've had or can remember any satisfactory service like the one I got from Cyber Wizard Recovery when I contacted them through a friend's recommendation following the loss of my BTC account and over $325,000 saved on crypto. I haven't seen such a professional service and with the way the process seemed easy, it was nothing short of pure satisfaction when they eventually were able to get my money back and also gave bonus additional and professional advice on how best I can secure my account. If you face a similar problem and want help, reach out to them  via EMAIL: helpcenter@cyber-wizard.com OR WhatsApp:+1 (551)755-3188