teleren/devto huggingface dataset:
A Comprehensive Guide to Nullable Reference Types in C# 10
Tags: csharp
Published: 2024-03-08 08:45:38

When it comes to coding in C#, one of the most important concepts to understand is nullable reference types. With the release of C# 10, nullable reference types have received a significant upgrade, making them even more powerful and useful for developers.

In this comprehensive guide, we will take a deep dive into nullable reference types in C# 10, covering everything from the basics to advanced techniques. We will explore how nullable reference types can help you write cleaner, safer code and avoid common pitfalls in your applications.

One of the key benefits of nullable reference types is that they allow you to explicitly express whether a variable or parameter can be null. This can help prevent null reference exceptions at runtime, making your code more robust and reliable. Nullable reference types also provide valuable information to the compiler, allowing it to catch potential null reference errors at compile time.

To enable nullable reference types in C# 10, you can use the "nullable enable" directive at the top of your C# file:

```csharp
#nullable enable
```

Once nullable reference types are enabled, you can use the nullable annotation syntax to indicate whether a variable or parameter can be null. For example, you can declare a nullable string like this:

```csharp
string? nullableString = null;
```

In this example, the "?" after the string type specifier indicates that the variable nullableString can be null. If you try to assign a non-null value to nullableString, the compiler will generate a warning to alert you to a potential null reference error.

You can also use the "null-forgiving" operator "!" to explicitly tell the compiler that you are aware of a potential null reference and want to access the value without checking for null:

```csharp
string nonNullableString = nullableString!;
```

However, you should use the null-forgiving operator sparingly, as it can lead to null reference exceptions at runtime if misused.

In addition to nullable reference types, C# 10 also introduces a new feature called "nullable context," which allows you to control the nullability of types within a specific code block. You can use the "nullable enable" and "nullable disable" directives to change the nullability context of the code block:

```csharp
#nullable enable
// Code with nullable reference types enabled

#nullable disable
// Code with nullable reference types disabled
```

By using nullable reference types and nullable context effectively, you can write cleaner, safer code in C# 10 and avoid common pitfalls related to null references. With a better understanding of nullable reference types, you can take your coding skills to the next level and build more reliable applications.

Overall, nullable reference types in C# 10 are a powerful feature that can help you write better code and catch potential null reference errors early in the development process. By mastering nullable reference types, you can become a more proficient C# developer and build robust, high-quality applications.
Understanding the useMemo Hook in React
Tags: react, hooks, usememo, frontend
Published: 2024-03-08 09:16:13

Understanding the useMemo Hook in React:
React, a popular JavaScript library for building user interfaces, provides a powerful set of hooks to manage state, effects, and other aspects of component behavior. One such hook that plays a crucial role in optimizing performance is useMemo.

What is useMemo?
The useMemo hook is designed to memoize the result of a computation in a React functional component. Memoization is a technique used to optimize performance by caching the results of expensive function calls and reusing them when the same inputs occur again.

When to Use useMemo?
Consider a scenario where a component performs a computationally expensive operation, such as filtering or mapping over a large dataset. Without memoization, this operation would run on every render, potentially leading to unnecessary recalculations and impacting performance.

Here's where useMemo comes into play. It allows you to memoize the result of a function and ensures that the function is only recomputed when its dependencies change. This is particularly useful when dealing with expensive calculations that don't need to be repeated on every render.

Syntax and Usage:
The basic syntax of useMemo is as follows:
`const memoizedValue = useMemo(() => computeExpensiveValue(a, b), [a, b]);`
The first argument is a function that performs the expensive computation.
The second argument is an array of dependencies. The memoized value will only be recalculated if any of these dependencies change.
Real-Life Example:
Let's consider a common use case - a list of items with a filter functionality. The filterItems function is computationally expensive, simulating a filtering operation:

const ItemList = ({ items, filterText }) => {
  const filterItems = (items, filterText) => {
    console.log('Filtering items...'); // Simulating an expensive operation
    return items.filter(item => item.name.toLowerCase().includes(filterText.toLowerCase()));
  };

  const filteredItems = useMemo(() => filterItems(items, filterText), [items, filterText]);

  // Rest of the component...
};
In this example, the filtering operation is memoized using useMemo. The expensive operation is only performed when the items array or the filterText changes, preventing unnecessary computations.

Benefits of Using useMemo:

Performance Optimization: Memoization avoids unnecessary recalculations, optimizing the performance of your components.
Preventing Unnecessary Renders: useMemo helps prevent unnecessary renders by skipping expensive computations unless the specified dependencies change.
Resource Usage: By memoizing values, you can reduce CPU and memory usage, especially in scenarios with large datasets or complex logic.

In summary, the useMemo hook is a powerful tool for optimizing React applications by selectively memoizing expensive computations. By leveraging this hook, developers can strike a balance between performance and responsiveness in their web applications.
Ruby's discreet argument forwarding shorthand...
Tags: ruby, webdev, rails
Published: 2024-03-08 09:14:22

_Yes, those three dots are intentional. Yes it's a pun. No I won't stop. Yes, you'll understand if you read this article to the end._

## The problem

Have you ever ended up writing tons of methods doing mostly parameter forwarding?

```Ruby
class Foo
  attr_reader :bar

  # That's the one:
  def do_stuff(x, y:)
    bar.do_stuff(x, y:)
  end
end
```

Ruby's `Forwardable` module may be the solution to writing simpler code:

```Ruby
require 'forwardable'

class Foo
  attr_reader :bar
  extend Forwardable
  def_delegator :@bar, :do_stuff
end
```

But what if I'd like to "do stuff" twice? Or add a log line?

## Triple dots to the rescue

Recently, I learned that Ruby includes an [argument forwarding shorthand](https://docs.ruby-lang.org/en/master/syntax/methods_rdoc.html#label-Argument+Forwarding) since its version 2.7! (Which exists since 2019)

### The syntax

This shorthand is `...`. Simple as that, and you can add your log line without bothering with how the arguments are going to evolve in the future:

```Ruby
def do_stuff(...)
  puts 'My log line'
  bar.do_stuff(...)
end
```

The good thing is: if `bar#do_stuff` is added another argument, my `foo#do_stuff` method do NOT have to change!

### Leading arguments

But what if I'd like to access one of the arguments before forwarding it?

Since its version 3.0, Ruby gained support for leading arguments:

```Ruby
def do_stuff(x, ...)
  bar.do_stuff(x, ...)
end
```

Hope you'll use it a lot...
Strapi is great 🚀
Published: 2024-03-08 09:12:39

💎 **Strapi **is the most advanced Node.js API Content Management Framework. Halfway between a Node.js Framework and a Headless CMS, it saves weeks of API development time.
The most basic feature of a Strapi API is to expose a CRUD. That means you can easily get, create, update and delete entries.
In this article you will learn how to build powerful, secure and fast API in Node.js without writing a single line of code. 🚩

🚀 https://strapi.io/ 👋

#strapi #nextjs14 #nextjs
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/gnyoqr9cs69dy5l0traz.jpg)
Advanced C# Delegates like a Senior Developer
Tags: csharp, dotnet, programming, tutorial
Published: 2024-03-08 08:55:47

In this video, I explain delegates from the perspective of a senior developer and show how delegates are used in real practical examples, and how they are compiled internally.

The tutorial shows how we use delegates when implementing:
-Strategy design pattern
-Observer design pattern
-Event-based Asynchronous pattern
-Functional programming concepts and more

{% embed https://www.youtube.com/watch?v=LEcxrLb3OpY %}

Want to dive deeper?

Every 5 days, I share my senior-level expertise on my '[DecodeBytes](https://www.youtube.com/@DecodeByte/videos)' YouTube channel, breaking down complex topics like .NET, Microservices, Apache Kafka, Javascript, Software Design, Node.js, and more into easy-to-understand explanations. Join us and level up your skills!
PowerShell - (Sate = NotStarted)
Published: 2024-03-08 08:53:52

Hi Everyone,

Greetings!

I am trying to run a powershell script, but I got in terminal the task not started as shown in the attached image.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ngw5krr3t5wnxltl93x1.png)

Any way on how to resolve it as I checked the syntax and all directories.

Best Regards
My New Portfolio!
Tags: watercooler, discuss, frontend, showdev
Published: 2024-03-08 08:38:26

Hey there.

I have been building my new portfolio for a week now and now, I need insights into it to see how much progress I have made.

A review would be appreciated on the things that can be improved.

My Old Portfolio - https://arjuncodess.vercel.app/
My New Portfolio(in dev phase) - https://arjuncodess-portfolio-new.vercel.app/

Thanks in advance!
thietbikiemsoat.vn
Published: 2024-03-08 08:28:00

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React 101: Your Beginner’s Guide to the Popular JavaScript Library
Tags: react, beginners, javascript, webdev
Published: 2024-03-08 08:22:49

---
series: React 101
---

## Introduction:
So you’ve heard the buzz about React, the JavaScript library powering some of the world’s most popular websites. But what exactly is it, and why should you care? This post dives into the world of React, explaining its core concepts and why it’s revolutionizing web development.
<br>

## What is React?
React is a declarative JavaScript library for building user interfaces. Unlike traditional web development where you manipulate the DOM directly, React lets you describe what you want to see on the screen, and it efficiently updates the DOM only when necessary. This leads to faster, more maintainable, and dynamic web applications.
<br>

## Why use React?
There are several compelling reasons to consider React for your next project:

**Component-based development:** Break down complex UIs into reusable building blocks called components, promoting code organization and reusability.

**Virtual DOM:** React uses a virtual representation of the DOM to optimize updates, resulting in smoother and faster performance.

**JavaScript all the way:** Leverages plain JavaScript, making it easy to learn and integrate with existing skills.

**Large and active community:** Benefit from extensive documentation, tutorials, and support from a vast developer network.
<br>

## Key Concepts to Grasp:
**JSX:** A syntax extension for JavaScript that resembles HTML, making it intuitive to write UI components.

**Props:** Data passed down from parent components to child components, defining their appearance and behavior.

**State:** Internal data managed by a component, allowing it to react to user interactions and dynamic changes.

**Lifecycle methods:** Functions that execute at specific stages of a component’s lifecycle, providing hooks for custom logic.
<br>

## Ready to Dive Deeper?
This is just a glimpse into the exciting world of React. Stay tuned for our next post where we’ll set up your development environment and get your hands dirty building your first React component!
<br>
> If you like this blog, you can visit my blog [sehgaltech](https://blog.sehgaltech.com/) for more content.

Follow me on
Instagram: https://www.instagram.com/devmadesimple/
Personal Blog: https://blog.sehgaltech.com/
Github: https://github.com/sayuj1
sodo6600com
Published: 2024-03-08 08:19:53

SODO6600.COM là trang chủ chính thức của nhà cái Sodo66 hiện nay trên thị trường cá cược trực tuyến tại khu vục Châu Á và các nước ở châu Âu.
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Email: sodo6600.com1@gmail.com
Website: http://sodo6600.com/
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International Women's Day 2024
Tags: womenintech, iwd, iwd2024, shebuilds
Published: 2024-03-08 08:16:28

Happy Women's Day to all the lovely ladies who came into my life and also going to meet in future 💐

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/28kd00u8ev4iuu5ohfru.png)

**The Poem**
In the tapestry of life, woven with grace, 
You stand tall, in every place. 
With hearts of courage, minds so bright, 
Shine as beacons, in the darkest night.
 
Nurture your dreams, with tender care, 
Your love and strength, are beyond compare. 
In every role, you play your part, 
With resilience and a fearless heart.
 
Break down barriers, and shatter glass ceilings, 
Your voices will echo, with powerful feelings. 
Rise above, in every way,
On this special Women's Day.
 
To all the women, far and near, 
Your strength, your beauty, so crystal clear. 
Celebrate yourselves, in every way, 
For you are the light, that brightens the day.

#iwd2024 #iwd #womenintech #workingmom #positivevibes
Development of smart contracts on Foundry:
Tags: blockchain, web, cybersecurity
Published: 2024-03-08 08:14:55

According to their official documentation here, Foundry is a smart contract development toolchain. This simply means that with foundry we can manage our dependencies, compile our projects, run extensive testing, carry out deployments and interact with the blockchain from the Command Line, and all of these is done with Solidity Scripts 

More details https://medium.com/@auditf1rst/development-of-smart-contracts-on-foundry-307e4973cd00

#smartcontracts #blockchainsecurity #auditfirst
#solidityaudittools #web3
https://auditfirst.io/
Code Security
Tags: codenewbie, devsecops, devops, cloudcomputing
Published: 2024-03-08 08:05:06

Have you read our recent article on code security that talks about the importance of Code Security, which is the practice of building security into code from the beginning of the development process, not as an afterthought?

Here's a breakdown of the key points:

## Why Code Security Matters:

Traditional approach of adding security after development is less effective and expensive.
Developers should be trained to write secure code from the start.

## What Code Security Covers:

OWASP's Top 10 - a list of common coding vulnerabilities like preventing unauthorized access, protecting data, and fixing vulnerabilities.

## 4 Phases of Code Security:

1. Prevention: Implementing security measures during development.
2. Detection: Identifying potential threats and unauthorized access.
3. Response: Having mechanisms to address security incidents.
4. Continuous Improvement: Regularly updating and improving security to adapt to new threats.

## Benefits of Cloud-Based Container Security:

Reduces risks like data breaches, misconfigurations, and ransomware attacks.

## Code Security Tools and Techniques:

1. Static Application Security Testing (SAST): Scans code for vulnerabilities against a database.
2. Dynamic Application Security Testing (DAST): Analyzes application behavior for vulnerabilities during runtime.
3. Automated Code Review: Uses AI to review code for security issues.
4. Secure Frameworks and Libraries: Pre-built tools with security features to save development time.

## Challenges of Code Security:

- Balancing security with development speed and functionality.
- Selecting the right security tools and integrating them into the development process.
- Raising awareness among developers about secure coding practices.
- Keeping up-to-date with evolving security threats and best practices.
In conclusion, the content emphasizes that code security is essential for building secure applications and offers various tools and techniques to achieve it. However, there are challenges to overcome, such as balancing security with development speed and keeping up with the ever-changing threat landscape.

You can read the original writeup [here](https://www.cloudanix.com/learn/what-is-code-security)
Optimizing Django Applications with Advanced QuerySet Techniques
Tags: beginners, programming, python, webdev
Published: 2024-03-08 08:00:57

Django is a fully loaded framework. This is a blessing but sometimes becomes a boon for performance if we use it without understanding. Aravind Srinivas gave some of the advanced techniques for Queryset to optimize database interactions in this article like select_related, prefetch_related & etc

{% embed https://awstip.com/optimizing-django-applications-with-advanced-queryset-techniques-6340abf6ac7 %}
Calling for Shout Outs on International Women's Day!
Tags: discuss, wecoded, iwd
Published: 2024-03-08 08:00:00

Hey folks! Let's take a moment to give a big shout-out to all the amazing women out there this International Women's Day! Whether they're making an impact around the world, right here on DEV, or in your own home, let's celebrate their achievements and contributions. 

Share your stories and appreciation for the incredible women who inspire you. Let's spread some love and recognition this International Womens Day! 💪:heart:
Breath fellow classmates, breath...
Tags: javascript, beginners, productivity, learning
Published: 2024-03-08 03:17:19

A lot of my fellow classmates have freaked out over the Flatiron School phase 1 final project (and chances are future students will freak out in future cohorts). Many were not aware that much of their stress and anxiety could have been immediately addressed by simply referring to guidelines and requirements provided in the course, and looking at additional resources on the Discord page under resources which covers far more proper expectations (like what the students are being "tested" on and asked to do) which are simple and basic at phase 1. Also, all students have 1-on-1 scheduling access to the phase instructors -so there's that. 

Proper communication, rationality, and healthy perception are important for any student of any discipline.
Top Bắc Kạn AZ
Published: 2024-03-08 07:55:30

Top Bắc Kạn AZ là trang web hàng đầu cung cấp thông tin đa dạng và đáng tin cậy về đời sống, sự kiện xã hội, kinh tế  mới nhất đến lịch sử, văn hóa, du lịch, địa điểm nổi tiếng, đặc sản ẩm thực và chia sẻ những kỷ niệm, trải nghiệm và góp phần giới thiệu vẻ đẹp văn hóa của tỉnh Bắc Kạn. 
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Your journey to international education begins here at Think Smart, the best study visa consultant in Chandigarh.
Published: 2024-03-08 07:51:47

At Think Smart, we understand the importance of education without borders. Our mission is to empower students like you to pursue academic excellence around the world by providing comprehensive study visa consultancy services. With a blend of expertise, dedication, and personalized attention, we strive to make your international education dreams a reality.
https://thinksmartconsultant.com/