Introducing C# 9: Improved target typing

Introduction

C# 9 brings a better target typing: “In C# 9.0 some expressions that weren’t previously target typed become able to be guided by their context.” – Microsoft – https://devblogs.microsoft.com/dotnet/welcome-to-c-9-0/#improved-target-typing

Let’s see that with some examples in this article.

Target-typed new expressions

C# 9, now, allows to omit the type of the object you are instantiating. **Obviously **you can’t combine it with var keyword 🙂 . You can’t combine it with a ternary statement neither, it will lead to a compilation error.

Examples:

using CSharp9Demo.Models;
	using System;

	namespace CSharp9Demo
	{
	    class Program
	    {
	        static void Main(string[] args)
	        {
	            // Direct assignment
	            Product product = new ("VideoGame", 1);

	            // Assignment from a ternary statement
	            bool isTrue = false;
	            Product anotherProduct = isTrue ? new ("VideoGame", 1) : null; // Compilation error: CS0173 Type of conditional expression cannot be determined because there is no implicit conversion between 'new(string, int)' and '<null>'

	            // Assignment with var keyword
	            var anotherProduct = new ("VideoGame", 1); // Compilation error: CS8754 There is no target type for new(string, int)
	        }
	    }

	    public class Product
	    {
	        private string _name;
	        private int _categoryId;

	        public Product(string name, int categoryId)
	        {
	            _name = name;
	            _categoryId = categoryId;
	        }
	    }

	    public class Book : Product
	    {
	        private string _ISBN;

	        public Book(string name, int categoryId, string ISBN) : base(name, categoryId)
	        {
	            _ISBN = ISBN;
	        }
	    }
	}

#.net 5 #csharp #csharp 9 #programming-c

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Buddha Community

Let's Give Some Unit Testing Love to C# 8 and C# 9 Features

According to StackOverflow, C## is one of the most-loved programming languages. And I completely understand that—it is powerful, easy to learn and consistently improving and developing. It is a living language. :)

The last couple of years, there were new features added to the languages, and the new versions keep coming up—C## 7, C## 8, C## 9.

As you know, we at Progress Telerik are proud that our products are always in sync with the latest things in the .NET world, and C## 9 and JustMock are no exception.

#c #c# #c#8 #c#9

Generics type in C# | Generic Class | Generic Method | C# Bangla Tutorial | Advanced C#

https://youtu.be/xGjX0R_6qDg

#oop in c# #object oriented programming in c# #object oriented concept in c# #learn oop concept #advance c# #generics type in c#

Generics type example in C# | Generic Class | Generic Method | C# Tutorial | Advanced C#

https://youtu.be/xfDjyg9jKSk

#oop in c# #object oriented programming in c# #object oriented concept in c# #learn oop concept #advance c# #generics type example in c#

How to Run C/C++ in Sublime Text?

C and C++ are the most powerful programming language in the world. Most of the super fast and complex libraries and algorithms are written in C or C++. Most powerful Kernel programs are also written in C. So, there is no way to skip it.

In programming competitions, most programmers prefer to write code in C or C++. Tourist is considered the worlds top programming contestant of all ages who write code in C++.

During programming competitions, programmers prefer to use a lightweight editor to focus on coding and algorithm designing. Vim, Sublime Text, and Notepad++ are the most common editors for us. Apart from the competition, many software developers and professionals love to use Sublime Text just because of its flexibility.

I have discussed the steps we need to complete in this blog post before running a C/C++ code in Sublime Text. We will take the inputs from an input file and print outputs to an output file without using freopen file related functions in C/C++.

#cpp #c #c-programming #sublimetext #c++ #c/c++

Dicey Issues in C/C++

If you are familiar with C/C++then you must have come across some unusual things and if you haven’t, then you are about to. The below codes are checked twice before adding, so feel free to share this article with your friends. The following displays some of the issues:

1. Using multiple variables in the print function
2. Comparing Signed integer with unsigned integer
3. Putting a semicolon at the end of the loop statement
4. C preprocessor doesn’t need a semicolon
5. Size of the string matters
6. Macros and equations aren’t good friends
7. Never compare Floating data type with double data type
8. Arrays have a boundary
9. Character constants are different from string literals
10. Difference between single(=) and double(==) equal signs.

---

The below code generates no error since a print function can take any number of inputs but creates a mismatch with the variables. The print function is used to display characters, strings, integers, float, octal, and hexadecimal values onto the output screen. The format specifier is used to display the value of a variable.

1. %d indicates Integer Format Specifier
2. %f indicates Float Format Specifier
3. %c indicates Character Format Specifier
4. %s indicates String Format Specifier
5. %u indicates Unsigned Integer Format Specifier
6. %ld indicates Long Int Format Specifier

---

A signed integer is a 32-bit datum that encodes an integer in the range [-2147483648 to 2147483647]. An unsigned integer is a 32-bit datum that encodes a non-negative integer in the range [0 to 4294967295]. The signed integer is represented in twos-complement notation. In the below code the signed integer will be converted to the maximum unsigned integer then compared with the unsigned integer.

#problems-with-c #dicey-issues-in-c #c-programming #c++ #c #cplusplus