teleren/devto huggingface dataset:
Prevent Unauthorized Instantiation of a Singleton Class in Swift
Tags: ios, swift, singleton, designpatterns
Published: 2023-11-03 08:45:24

In Swift, a Singleton is a design pattern that ensures that a class has only one instance and provides a global point of access to that instance. To prevent the creation of additional instances of a Singleton class, you can take a few steps:

**Use a Private Constructor:** Make the initializer (constructor) of your Singleton class private, so it can only be called from within the class itself. This will prevent external code from creating new instances of the class.

**Provide a Static Property for Access:** Create a static property (often called shared or sharedInstance) to provide a single point of access to the Singleton instance. This property will be responsible for creating and returning the single instance of the class.

_Here’s an example of how to create a Singleton in Swift:_

```
`class MySingleton {
    // Step 1: Make the constructor private
    private init() {
        // Initialization code here
    }
    
    // Step 2: Create a static property for access
    static let shared = MySingleton()
    
    // Add other properties and methods here
}
`

```
With this implementation, you can access the Singleton instance like this:

`let mySingleton = MySingleton.shared
`
No other instances of MySingleton can be created from outside the class because the constructor is private.

By following these steps, you can ensure that your Singleton class remains a true Singleton, with only one instance throughout your application.

_A sample code that demonstrates what happens if you try to create an instance of a Singleton class with a private constructor:
_

```
`class MySingleton {
    private init() {
        print("Creating a MySingleton instance.")
    }
    
    static let shared = MySingleton()
}

// Attempting to create a new instance
let instance1 = MySingleton()  // This will result in a compile-time error

```
`

In this code, when you try to create a new instance of MySingleton using let instance1 = MySingleton(), you will receive a compile-time error because the constructor is private. The error message will look something like:

`'init' is inaccessible due to 'private' protection level
`
This error prevents you from creating additional instances of the Singleton class, ensuring that only the shared property can be used to access the single instance of the class.
Search Operation in Arrays in python.
Published: 2023-11-03 08:42:03

a search operation can be performed on an element based on its value  or index.

we search a data element using the python in-built index() method. Enter the following code in a python file and try to execute it.

```

from array import *

vincente = array('i', [10, 20, 30, 40, 50, 70, 80])


index = vincente.index(50)
```

**output**
When we compile and execute the above program, it produces the following result which shows the index of the element. If the value is not present in the array then the program returns an error

```
Index of 50: 4
```
Deletion Operation in Arrays in Python.
Published: 2023-11-03 08:31:55

Deletion refers to removing an existing element from the array and re-organizing all elements of an array.

**example of deleting**

```
from array import *

vin =  array('i',[20,40,50,60,80,70])

vin.remove(80)

for x in vin:
    
    print(x)
```

**output**

```
20
40
50
60
70
```
Git Alias
Tags: git, opensource
Published: 2023-11-03 08:24:53

Hi folks 🖐!! In this Blog I will tell you about Git aliases.
Git aliases are like custom shortcuts for frequently used commands, making your code shorter and more concise. They help save time and streamline your workflow, allowing developers to focus on more productive tasks. These aliases are stored in Git configuration files, enhancing code readability and efficiency.

**Example :** Here's an example of a simple Git alias that shortens a common Git command:

Let's say you frequently use the git status command to check the status of your repository. You can create a simple Git alias to make this command shorter:

```
git config --global alias.st status

```
With this alias set, you can now check the status of your repository using the alias like this:

```
git st

```
This will have the same effect as running git status, but it's shorter and more convenient. Simple Git aliases like this can save you time and make your workflow more efficient.
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ew3qti0fmcw68zmt9frm.png)

**Summmary 👇**
I trust this blog has enhanced your Git workflow. Should you have any questions or ideas, feel free to share them in the comments below.

If you found this content valuable and acquired new insights, show your appreciation with a ❤️.

For further exploration of Git, GitHub, Git Config, or any coding-related topics, please follow.
Thank you NetdevConf!
Published: 2023-11-03 08:27:36

We are so thankful to the NetDev organization for another extraordinary conference, for the attention, the great lecturers that joined us, and the work behind all of it to gather and share knowledge. 
https://www.relianoid.com/about-us/events/netdev-conference-0x17/
#NetdevLinuxConference #LinuxNetworking #OpenSource #NetworkingTechnology #ProfessionalDevelopment #CommunityBuilding #OpenSourceAdvocacy #Transparency #LinuxKernel #OpenSourceProjects #CuttingEdgeTechnology #LinuxKernelDevelopment #MultiPHY #NICOffloads #eBPF #NetworkingSolutions #TutorialsAndWorkshops #HandsOnLearning #ManyaGhobadi #MachineLearning #NetworkingProfessionals #SREExpertTeam #RELIANOID
Insertion Operation in Arrays in Python.
Published: 2023-11-03 08:26:11

insertion is a process of inserting one or more elements into an array,Based on requirement an array can be inserted  at the begnining, end or any given index of array.

Enter the code below to  to see output:

```
from array import *

tommi =  array('i',[12,34,56,76,80,90,30])

tommi.insert(1,30)
for x in tommi:
    print(x)
```

**output **

```
12
30
34
56
76
80
90
30
```
The Art of Elegance: Troy Curtis Orchestra's Timeless Performances
Tags: learning, reactnative, google, writing
Published: 2023-11-03 08:26:07

Discover the epitome of musical elegance with the [Troy Curtis Orchestra](https://troycurtisentertainment.com/talent-roster/troy-curtis-orchestra/). Their timeless performances transcend eras, blending sophistication with a contemporary twist. With each note, they transport audiences to a world of grace and charm, where melodies from the past harmonize seamlessly with the present. The orchestra's artistry, led by maestro Troy Curtis, has the power to evoke emotions and create unforgettable moments. Experience the magic of live music that transcends time, making every event a truly remarkable and elegant affair. Let the Troy Curtis Orchestra serenade you with their enchanting performances, where timeless melodies come to life.
Careful using forEach in Javascript
Tags: javascript, typescript, webdev
Published: 2023-11-03 08:20:56

When dealing with asynchronous functions, using `Array.prototype.forEach()` can lead to unexpected behavior. Let’s explore why and discuss alternative approaches.

1. **Array.prototype.forEach() and Asynchronous Functions**:

- The `forEach()` method is commonly used for iterating through arrays. However, it has a limitation: it **does not** work well with asynchronous functions.

- When you use `forEach()` with asynchronous operations (such as promises), it does not wait for the promises to resolve. As a result, the calculations inside the promises may be lost, leading to incorrect results or errors.

**Example**


```
const ratings = [5, 4, 5];
let sum = 0;

const sumFunction = async (a, b) => a + b;

ratings.forEach(async (rating) => {
  sum = await sumFunction(sum, rating);
});

console.log(sum);
// Naively expected output: 14
// Actual output: 0
```


- In the sumFunction is asynchronous, but the `forEach()` loop does not wait for the promises to complete. Hence, the actual output is 0, even though you would naively expected it to be 14.

**2. Alternative Approach: Using `for...of:`**

Instead of f`orEach()`, consider using a `for...of` loop. This loop does await each asynchronous task in order, ensuring that promises are resolved before moving to the next iteration.
Here’s how you can rewrite your example using `for...of:`


**Example**


```
const ratings = [5, 4, 5];
let sum = 0;

const sumFunction = async (a, b) => a + b;

for (const rating of ratings) {
  sum = await sumFunction(sum, rating);
}

console.log(sum); // Expected output: 14

```


**3. Best Practices:**

- While `for...of` is a better choice for handling asynchronous tasks, it’s essential to understand the behavior of different iteration methods.

- Be aware of conventions and project-specific guidelines. Discuss with your team to find the solution that best suits your project’s needs.

Remember, using the right iteration method can significantly impact the correctness and performance of your code. 

Happy coding! 🚀🔍👩‍💻


References

- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of
Key Python Concepts for Your Coding Journey
Published: 2023-11-03 08:17:33

Python is a versatile programming language that's known for its simplicity, readability, and extensive library support. Whether you're a complete beginner or looking to deepen your knowledge, understanding the key concepts is crucial for your coding journey.

**Basics**
The first step in your Python journey is to grasp the basics. This includes understanding Python syntax, data types, variables, loops, and conditional statements. You should also familiarize yourself with Python's built-in functions and modules, and learn how to use them in your code _realpython.com._

**Intermediate Concepts**
Once you're comfortable with the basics, you can move on to intermediate concepts. These include working with data structures like lists, tuples, sets, and dictionaries, understanding file I/O, and learning about regular expressions and exceptions_ dev.to._

**Advanced Concepts**
Advanced Python concepts include understanding decorators, generators, context managers, and metaclasses. You should also learn about Python's memory management and how to optimize your code for performance. Understanding object-oriented programming (OOP) is also crucial. This includes knowing how to define classes, create objects, and use inheritance and polymorphism _levelup.gitconnected.com._

**Working with Libraries and Frameworks**
Python has a rich ecosystem of libraries and frameworks that can help you build complex applications. Libraries like NumPy and Pandas are widely used for data analysis and manipulation, while frameworks like Django and Flask are used for web development. It's important to understand how to use these tools effectively _dev.to._

**Best Practices**
Finally, it's important to learn about best practices for writing Python code. This includes understanding how to write clean, readable code, how to use version control systems like Git, and how to write tests for your code. Following these best practices will make your code more maintainable and easier to debug _realpython.com._

In conclusion, mastering these key Python concepts will help you become a proficient Python developer capable of tackling complex projects and solving intricate problems. 

    Happy coding!
I am doing Two internships in Web Development by remote...
Published: 2023-11-03 08:14:35

First internship in Webmobi360.That company located in Pune.And I am doing this internship by remote.It is started from 30 Oct 2023.
Second internship in CodeClause.That company is also located in Pune.And I am doing this internship by remote.It is started from 01 Nov 2023.
LEARNING REACT
Tags: beginners, react, webdev
Published: 2023-11-03 08:03:41

Just learned the **basic concept of react: Intro & Installation**
React is an open-source JavaScript library for building interactive and dynamic user interfaces
It was developed and is maintained by Facebook.

## To get started with react,
you'll need Node.js and Node Package Manager installed on your system why beacuse they provide the necessary runtime environment, package management, and tools to create, build, and manage React apps.
you can install from the official website [https://t.co/BRgERMoXz0](https://t.co/BRgERMoXz0)

After a successful installation,
##  To create a react app,
you open your terminal or command prompt to run the comand
`npx create-react-app react-app`
Here, `react-app` is the name you choose for your project.


![ Creating a new React app. ](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/fa3ztjgeu91mv1rgoiku.png)

## To run a react app,
you need to be on your app directory. And to  do that change directory, run the command 
`cd  react-app`

![Changing the directory to 'react-app](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/486lpo7ad0n2iafblkvx.png)

Finally,to open a React app in a web browser, allowing any changes you make to your code reflect in real-time,
run the command
`npm start`
![ Starting the React app for real-time testing](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/qlre8sq8ngtgejr64px5.png)
![port http://localhost:3000/](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ysqhd63a49wpvgt8u9wx.png)

You can access your React app in a web browser at http://localhost:3000/.


And that's it!! 🎉🥳🎊
Accessing Array Element in Python.
Published: 2023-11-03 07:57:31

We can access each element of an array using the index of the element. The below code shows how to access an array element.

```
from array import * 

vincent = array('i',[30,40,50,60,70,80,70,100])

print(vincent[1])
print(vincent[2])
print(vincent[4])
```

**output:**

```
40
50
70
```
Dropdown Menu ✨
Tags: freecodez, react, html, blog
Published: 2023-11-03 07:51:38

Hey there, You are most welcome to this article. I hope you will enjoy this article. If you like this article then please share this article with your friends and colleagues. If you have any questions or suggestions regarding this article then please comment down below.

**Dropdown Menu ✨**

![Dropdown Menu ✨](https://res.cloudinary.com/freecodez/image/upload/v1698997891/images/gtc33s8ig0nsmic9itsk.webp)

For full source code visit : [https://freecodez.com/post/uregvjy](https://freecodez.com/post/uregvjy)


```
<!-- https://freecodez.com -->
<div class="dropdown-container">
    <button class="dropdown-button main-button">
    <span class="dropdown-title-icon">
      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
        <path d="M16 8.049c0-4.446-3.582-8.05-8-8.05C3.58 0-.002 3.603-.002 8.05c0 4.017 2.926 7.347 6.75 7.951v-5.625h-2.03V8.05H6.75V6.275c0-2.017 1.195-3.131 3.022-3.131.876 0 1.791.157 1.791.157v1.98h-1.009c-.993 0-1.303.621-1.303 1.258v1.51h2.218l-.354 2.326H9.25V16c3.824-.604 6.75-3.934 6.75-7.951z" />
      </svg>
    </span>
    <span class="dropdown-title text-truncate">Facebook</span>
    <span class="dropdown-arrow">
      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
        <path d="M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z" />
      </svg>
    </span>
  </button>
    <div class="dropdown-list-container">
        <div class="dropdown-list-wrapper">
            <ul class="dropdown-list"></ul>
            <div class="floating-icon" aria-hidden="true"></div>
        </div>
    </div>
</div>
```

Source Code : [https://freecodez.com/post/uregvjy](https://freecodez.com/post/uregvjy)

For more such articles visit : [https://freecodez.com](https://freecodez.com/all)
Delta Airlines Honolulu Office
Tags: airlines, airport, travel, air
Published: 2023-11-03 07:51:29

The knowledgeable team at the [Delta Airlines Honolulu Office](https://www.livetravoairlines.com/delta-airlines/delta-airlines-honolulu-office-in-hawaii/) is available to assist travelers with booking bookings, changing flights, and purchasing tickets. The group also helps to provide other flight-related amenities and services that Delta Airlines provides.
Hire a Top-Tier Mobile App Development Company
Published: 2023-11-03 07:46:29

Hiring a [mobile application development company](https://iteconic.com/us/mobile-app-development-company) requires the right set of expertise and experience that will help you scale up your business presence to new heights. All thanks to ITEconic’s team of app developers who have a pool of skilled and talented mobile application engineers to hire. With a track record of excellence and innovation, we bring your app ideas to life, leveraging cutting-edge technologies to create solutions that captivate users and drive business growth.
At ITEconic, we understand that every app is unique on its own, catering to distinct audiences and objectives. That’s the reason we being the leading [mobile app development company](https://iteconic.com/) proffers a well-versed app by following all the top trends and technologies. Our team of skilled developers, designers, and strategists work collaboratively to craft customised mobile applications that exceed expectations. Whether you need an iOS, Android, or cross-platform app, we have the expertise to deliver seamless user experiences and robust functionality.
With the transforming nature of businesses, hiring a [Mobile Application Development Company UAE](https://iteconic.com/ae/mobile-app-development-company) is a pivotal step toward transforming your app idea into a functional and successful reality. The UAE's dynamic market, coupled with the expertise of a professional development company, offers a fertile ground for innovation and growth. By partnering with a reputable company, you gain access to technical proficiency, creative design, and a strategic approach that can elevate your app's impact and reach.
Arrays in Python
Published: 2023-11-03 07:40:28

Array is  a container  which  can hold  a fixed number  of items  and these items are of the same type.

**<u>Important Terms in  arrays:</u>**
1 Element - items stored in an array.
2 Index -   location of each  element in an array and  has a numerical index that used for identification.

<u>**Basic Operation that can be carried in an ar</u>ray**
  1 Traverse - printing all elements one by one.
  2 Insertion -adding  an element to an array.
  3 Deletion  -  Deleting an element at a given position.
  4 Search - Searching an element at a given index or value
  5 Update - Updating  an element at a  given position.


  **Array Example:**
   

```
from array import *
   vincente =  array('i',[10,20,30,40,50]

     for x in vincente:
           print(vincent
```
e)

**output:**

```
10
20
30
40
50
```
Moment.js Is Now Legacy Project | Alternatives?
Tags: webdev, javascript, programming, beginners
Published: 2023-11-03 07:39:20

If your project deals with complex date and time then you probably have been use to of moment.js. **Be aware**, Moment.js has become a **legacy project**. You can check the project status [here](https://momentjs.com/docs/#/-project-status/),

```
We now generally consider Moment to be a legacy project in maintenance mode.
```
Furthermore,
```
 It is not dead, but it is indeed done.
```

So, what's next?

Go for these:

## dayjs

Fast 2kB alternative to Moment.js with the same modern API. I myself have used this for more than a year and found it really cool, easy and super helpful.

Get started here:
https://day.js.org/docs/en/installation/installation

## date-fns

date-fns provides the most comprehensive, yet simple and consistent toolset for manipulating JavaScript dates in a browser & Node.js.

Get started here:
https://date-fns.org/docs/Getting-Started

## luxon

A powerful, modern, and friendly wrapper for JavaScript dates and times.

Get started here:
https://moment.github.io/luxon/#/?id=luxon


Happy coding! 🚀👨‍💻🌐

Follow me for more such content:
LinkedIn: https://www.linkedin.com/in/shameeluddin/
Github: https://github.com/Shameel123
Elevate Your Wardrobe: A Journey through Denim Fashion
Published: 2023-11-03 07:33:22

Denim is a fabric that lasts forever and remains a style favorite. In this article, we'll explore denim's history, its various styles, and how it continues to be a beloved choice in fashion. From its beginnings to the trends that keep it stylish, denim holds a special place in our wardrobes.

The Denim History and Evolution

Delve into denim's rich history, understanding its evolution from humble origins to iconic fashion status. Discover its journey through the ages, shaping global trends.

Find the Perfect Fit, Perfect Fashion 

Learn the art of choosing denim that complements your body. From jeans to jackets, our collection at the online clothing store offers tailored options, ensuring you look and feel fabulous.

Denim Beyond Jeans 

Explore denim's versatility with our curated collection. From stylish jackets and shirts to trendy skirts and dresses, embrace the endless fashion potential beyond traditional jeans.

Denim Styling Tips

Creatively Unlock the secrets of creative denim styling. Whether it's casual chic with distressed jeans or sophistication with a denim blazer, our tips help you mix and match for a stunning look.

Caring for Your Denim

Maintain your denim's quality with proper care. Explore washing techniques and maintenance tips to preserve your denim's freshness, ensuring longevity.

Keeping Up with Denim Trends

Stay ahead with the latest denim trends. Explore our online clothing store's exclusive collection, featuring printed t-shirts, crop tops, jogger pants, and more, to keep your denim wardrobe chic and contemporary.

Conclusion: 

Your denim journey goes beyond fashion—it's a statement of self-expression. With a deep understanding of denim's legacy, the right fit, creative styling, and trend awareness, you can master the art of denim fashion. Dive into our online clothing store's offerings, including t-shirts for women, jeans tops for ladies, sports t-shirts, night suits for boys, and formal pants for men. Elevate your style, embracing the allure of denim with every outfit. Shop now at Radprix to redefine your fashion narrative.

Denim is more than just a fabric; it's a journey of fashion. By understanding its history, finding the right fit, exploring different styles, taking care of your denim, and staying in the know about trends, you can become a fashion pro with this classic material. Explore our online clothing store's collection, featuring t-shirts for women, jeans for ladies, sports t-shirts, night suits for boys, and formal pants for men. Elevate your style with denim, and shop now at Radprix to express your unique fashion sense.

Photo by Anna Shvets: https://www.pexels.com/photo/group-of-multiethnic-models-demonstrating-casual-denim-outfits-5325599/


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/qibm99nr9wvz95e0ha8o.jpg)