« Csharp 12 » : différence entre les versions
Page créée avec « Category:CSharp = Links = * [https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-12 What's new in C# 12] » |
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| (8 versions intermédiaires par le même utilisateur non affichées) | |||
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= Links = | = Links = | ||
* [https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-12 What's new in C# 12] | * [https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-12 What's new in C# 12] | ||
= [https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/tutorials/primary-constructors Primary constructors] = | |||
{{warn | Default value parameters must be compile time consistant.}} | |||
<kode lang='cs'> | |||
public class Item | |||
{ | |||
public readonly string Name { get; } | |||
public Item (string name) | |||
{ | |||
Name = name; | |||
} | |||
} | |||
// equivalent with a primary constructor | |||
public class Item(string name) | |||
{ | |||
public string Name { get; } = name; | |||
} | |||
</kode> | |||
= [https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-12#collection-expressions Collection Expressions] = | |||
<kode lang='cs'> | |||
// initialization | |||
int[] a = [1, 2, 3]; | |||
List<int> l = [4, 5, 6]; | |||
// concat items from different collections with the spread element: ..e | |||
int[] all = [.. a, .. l]; // [1, 2, 3, 4, 5, 6]; | |||
</kode> | |||
= [[Parameter_modifiers#ref_readonly|ref readonly modifier]] = | |||
Dernière version du 16 septembre 2024 à 13:33
Links
Primary constructors
 |
Default value parameters must be compile time consistant. |
|
public class Item
{
public readonly string Name { get; }
public Item (string name)
{
Name = name;
}
}
// equivalent with a primary constructor
public class Item(string name)
{
public string Name { get; } = name;
}
|
Collection Expressions
|
|
// initialization
int[] a = [1, 2, 3];
List<int> l = [4, 5, 6];
// concat items from different collections with the spread element: ..e
int[] all = [.. a, .. l]; // [1, 2, 3, 4, 5, 6];
|