News - Software Developer's Tour https://pawelmajewski.com Website about programming, news in IT and more Wed, 11 Jun 2025 09:03:07 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.1 https://pawelmajewski.com/wp-content/uploads/2024/02/logo_normal.png News - Software Developer's Tour https://pawelmajewski.com 32 32 Discover What’s New in C# 13: Exciting Features and Enhancements https://pawelmajewski.com/discover-whats-new-in-c-13-exciting-features-and-enhancements/?utm_source=rss&utm_medium=rss&utm_campaign=discover-whats-new-in-c-13-exciting-features-and-enhancements https://pawelmajewski.com/discover-whats-new-in-c-13-exciting-features-and-enhancements/#respond Thu, 24 Apr 2025 12:19:39 +0000 https://pawelmajewski.com/?p=8721 .NET 9 was released on May 21, 2024. .NET 9 was released on May 21, 2024. A while ago, we talked about the new features introduced in .NET 8 – a worthy successor to .NET 6? It hasn’t been long, and we already have .NET 9. Let’s talk about new interesting features. How to test […]

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.NET 9 was released on May 21, 2024.

.NET 9 was released on May 21, 2024.

A while ago, we talked about the new features introduced in .NET 8 – a worthy successor to .NET 6?

It hasn’t been long, and we already have .NET 9. Let’s talk about new interesting features.

How to test C# 13 (.NET 9)?

Normally, when we try to build application

compiler error

We will get an error 

Following error message we have to change .csproj file

Original .csproj file

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

</Project>

Final version

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <LangVersion>Preview</LangVersion>
  </PropertyGroup>

</Project>

After this modification, the application builds successfully.

build success

Implicit index access

This feature is useful when we are using arrays with a known size. 

The code

var test = new Test
{
    Array = {
        [^4] = 0,
        [^2] = 1,
        [^3] = 2,
        [^1] = 3,
    },
    Array2 = {
        [2] = 0,
        [0] = 1,
        [3] = 2,
        [1] = 3,
    }
};

test.Array.ToList().ForEach(x => Console.Write(x));
Console.WriteLine();
test.Array2.ToList().ForEach(x => Console.Write(x));

class Test { 
    public int[] Array = new int[4];
    public int[] Array2 = new int[4];
}

Until now, we could do something like this.

    Array2 = {
        [2] = 0,
        [0] = 1,
        [3] = 2,
        [1] = 3,
    }

But now we are available to do something like this

Array = {
        [^4] = 0,
        [^2] = 1,
        [^3] = 2,
        [^1] = 3,
    }

Python provides elements from the end of a collection by using negative indices (-1, -2, etc.). In C#, we can do the same by using the “^” operator, but until now we weren’t able to use it in initializer expression.

I don’t know of any case where I would use it, but now this limitation is gone.

Enhancements to Extensions

The code

var square1 = new Square {
    A = 2
};

Console.WriteLine(square1.CalculateArea());
Console.WriteLine(square1.CalculateDiagonal());

class Square { 
    public int A { get; set; }
}

static class TestExtensions {
    public static int CalculateArea(this Square square) {
        return square.A * square.A;
    }

    public static double CalculateDiagonal(this Square square) {
        return square.A * Math.Sqrt(2);
    }
}

Above is a simple example of existing extensions. What improvements can we make in .NET 9 and C# 13?

The CalculateArea method is good, and we have nothing to change here.

The CalculateDiagonal method would be clearer and more intuitive if it were a property, not a method. With C# 13 we can do that!

The code

var square1 = new Square {
    A = 2
};

Console.WriteLine(square1.CalculateArea());
Console.WriteLine(square1.CalculateDiagonal());
Console.WriteLine(square1.Diagonal);

public class Square 
{ 
    public int A { get; set; }
}

public implicit extension SquareExtensions for Square
{
    public double Diagonal => this.A * Math.Sqrt(2);
}

static class TestExtensions 
{
    public static int CalculateArea(this Square square) {
        return square.A * square.A;
    }

    public static double CalculateDiagonal(this Square square) {
        return square.A * Math.Sqrt(2);
    }
}

This part of code extends the Square class with an attribute called Diagonal. What’s interesting is that we can extend everything, even types not owned (for example, from NuGet packages).

public implicit extension SquareExtensions for Square
{
    public double Diagonal => this.A * Math.Sqrt(2);
}

You can track the progress on Language Feature Status. 

You can read more about C# 13 at: https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-13

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]]> https://pawelmajewski.com/discover-whats-new-in-c-13-exciting-features-and-enhancements/feed/ 0 How to generate website using Chat GPT https://pawelmajewski.com/how-to-generate-website-using-chat-gpt/?utm_source=rss&utm_medium=rss&utm_campaign=how-to-generate-website-using-chat-gpt https://pawelmajewski.com/how-to-generate-website-using-chat-gpt/#comments Tue, 25 Feb 2025 17:25:36 +0000 https://pawelmajewski.com/?p=8590 Today I’ll speak with Chat GPT and I’ll ask him to generate simple website for me. Message for Chat GPT Generate a simple website for my company. Use light colors with a sea context. In the header, add my name ‘Paweł Majewski,’ and in the footer, add a copyright notice with my name as well. […]

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]]>

Today I'll speak with Chat GPT and I'll ask him to generate simple website for me.

chat gpt response
The continuation of the response from the GPT chat

This code creates a simple website with a header containing your name, a navigation menu with three links corresponding to each section, three sections with different content, and a footer with a copyright notice. Each section is given an ID to enable scroll-on-click functionality. The colors used are light and inspired by a sea context.

How does the website look? Let’s check it out!

pawel majewski website generated by chat gpt

Let’s check this website code in https://validator.w3.org/#validate_by_upload

w3 validation ok

Validation ok.

Let’s take a closer look at the code.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Paweł Majewski</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
    }
    header {
      background-color: #5ab9ea;
      color: white;
      text-align: center;
      padding: 20px 0;
    }
    nav {
      background-color: #5ab9ea;
      text-align: center;
      padding: 10px 0;
    }
    nav a {
      color: white;
      text-decoration: none;
      padding: 0 20px;
    }
    nav a:hover {
      text-decoration: underline;
    }
    section {
      padding: 50px 20px;
    }
    footer {
      background-color: #5ab9ea;
      color: white;
      text-align: center;
      padding: 20px 0;
      position: fixed;
      bottom: 0;
      width: 100%;
    }
  </style>
</head>
<body>
  <header>
    <h1>Paweł Majewski</h1>
  </header>
  <nav>
    <a href="#about">About Me</a>
    <a href="#quotes">Quotes</a>
    <a href="#gratitude">Gratitude</a>
  </nav>
  <section id="about">
    <h2>About Me</h2>
    <p>Welcome to my blog, pawelmajewski.com. Here, I share my thoughts on various topics and offer insights into my life. Explore my world and join the conversation!</p>
    <p>Marketing slogans: <em>Discover, Engage, Inspire</em></p>
  </section>
  <section id="quotes">
    <h2>Quotes</h2>
    <blockquote>
      <p>"The only way to do great work is to love what you do." - Steve Jobs</p>
    </blockquote>
    <blockquote>
      <p>"Success is not final, failure is not fatal: It is the courage to continue that counts." - Winston Churchill</p>
    </blockquote>
    <blockquote>
      <p>"The future belongs to those who believe in the beauty of their dreams." - Eleanor Roosevelt</p>
    </blockquote>
  </section>
  <section id="gratitude">
    <h2>Gratitude</h2>
    <p>Thank you for visiting my website. Your support means the world to me. Feel free to reach out and connect!</p>
  </section>
  <footer>
    <p>&copy; 2024 Paweł Majewski. All rights reserved.</p>
  </footer>
</body>
</html>

Website generated by ChatGPT doesn’t include JavaScript, but you can easily ask ChatGPT to add some JavaScript code.

 <script>
    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
      anchor.addEventListener('click', function (e) {
        e.preventDefault();

        document.querySelector(this.getAttribute('href')).scrollIntoView({
          behavior: 'smooth'
        });
      });
    });
  </script>

This JavaScript code adds smooth scrolling behavior to the navigation links. When a link is clicked, it scrolls smoothly to the corresponding section on the page instead of jumping abruptly.

Okay, it looks like the first webpages from when the internet was just a young child. Try something different.

Sure, here’s a simple example of a beautiful website with animations:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Beautiful Website with Animations</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f0f0f0;
    }
    header {
      background-color: #5ab9ea;
      color: white;
      text-align: center;
      padding: 20px 0;
      animation: fadeInDown 1s ease-out;
    }
    h1 {
      margin: 0;
    }
    nav {
      background-color: #5ab9ea;
      text-align: center;
      padding: 10px 0;
      animation: slideInLeft 1s ease-out;
    }
    nav a {
      color: white;
      text-decoration: none;
      padding: 0 20px;
    }
    nav a:hover {
      text-decoration: underline;
    }
    section {
      padding: 50px 20px;
      text-align: center;
    }
    footer {
      background-color: #5ab9ea;
      color: white;
      text-align: center;
      padding: 20px 0;
      position: fixed;
      bottom: 0;
      width: 100%;
      animation: fadeInUp 1s ease-out;
    }

    /* Animation Keyframes */
    @keyframes fadeInDown {
      from {
        opacity: 0;
        transform: translateY(-50px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    @keyframes slideInLeft {
      from {
        opacity: 0;
        transform: translateX(-50px);
      }
      to {
        opacity: 1;
        transform: translateX(0);
      }
    }
    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(50px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
  </style>
</head>
<body>
  <header>
    <h1>Beautiful Website with Animations</h1>
  </header>
  <nav>
    <a href="#about">About</a>
    <a href="#services">Services</a>
    <a href="#contact">Contact</a>
  </nav>
  <section id="about">
    <h2>About Us</h2>
    <p>Welcome to our beautiful website! We are dedicated to creating stunning designs and engaging user experiences.</p>
  </section>
  <section id="services">
    <h2>Our Services</h2>
    <p>Explore our range of services designed to meet your needs. From web design to digital marketing, we've got you covered!</p>
  </section>
  <section id="contact">
    <h2>Contact Us</h2>
    <p>Ready to start your project? Contact us today and let's create something amazing together!</p>
  </section>
  <footer>
    <p>&copy; 2024 Beautiful Website. All rights reserved.</p>
  </footer>
</body>
</html>

This code creates a simple website with a header, navigation menu, three sections (About, Services, Contact), and a footer. Each element has an animation effect applied to it, making the website more visually appealing.

beautifull website by chat gpt

Seems like ChatGPT and I have different understandings of what makes a ‘beautiful website’ but that’s alright 🙂

Summary

Developers relax!

So far, as seen in these examples, ChatGPT isn’t able to replace us yet, even in creating simple websites (tested on ChatGPT 3.5 version).

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]]> https://pawelmajewski.com/how-to-generate-website-using-chat-gpt/feed/ 1 .NET 8 – a worthy successor to .NET 6? https://pawelmajewski.com/net-8-a-worthy-successor-to-net-6/?utm_source=rss&utm_medium=rss&utm_campaign=net-8-a-worthy-successor-to-net-6 https://pawelmajewski.com/net-8-a-worthy-successor-to-net-6/#comments Sun, 05 Jan 2025 07:00:00 +0000 http://localhost/pawelmajewski/?p=8342 Hi!  Today, I’d like to discuss the news about .NET 8. As you may know, .NET 6 will reach the end of support on November 12, 2024, and the next LTS version will be .NET 8. https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core What is the best feature in C# 12? For me, the absolute best feature is definitely the one […]

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Hi! 

Today, I’d like to discuss the news about .NET 8. As you may know, .NET 6 will reach the end of support on November 12, 2024, and the next LTS version will be .NET 8.

.NET and .NET Core release lifecycle
https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core

What is the best feature in C# 12?

For me, the absolute best feature is definitely the one called “Collection Expressions”.

In C#, the syntax for creating arrays has been made similar to that of Python or JavaScript.

Take a look at the syntax below.

As you can see, there’s no need to use new keyword before array initialization.

When is it useable in real code?

Pass argument as array to function old way
Old way to pass single variable as array

VS

New way to pass single variable as array

The second option seems better, doesn’t it?

Rule for your IDE (IDE0300)

This rule prefers new syntax and IDE will show you probably well known light bulb suggestions.

You can read more about it on 

Use collection expression for array (IDE0300)

What other interesting changes are there?

I want to talk about breaking changes between .NET 6 and .NET 7.

First, the code

https://learn.microsoft.com/pl-pl/dotnet/csharp/whats-new/breaking-changes/compiler%20breaking%20changes%20-%20dotnet%208

It looks very complicated, but after spending some time, it looks easy. The title of this is

Previously, when we executed the M method with the ref i argument as M(ref i), the first matched method was the extension method with the ref int i parameter in line 11.

Now in .NET 8 we are allowed to pass ref arguments to function with in parameters. That means when we execute M(ref i) the first matched method will be instance method in class C.

Why do I consider this change to be rather significant?​

I believe that changing the outcome of previously written code is very risky. While this is an extreme case for the problem being described here, if the functionality relying on the above scheme hasn’t had tests written for it, the application’s behavior may become unpredictable in certain cases.

Is that all?

Of course not, C# 12 introduces more interesting things like FrozenDictionary or FrozenHashSet and more, but that’s for another time.

Want to know more?

Visit What’s new in C# 12

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