Joy.Then 0.0.2

There is a newer version of this package available.
See the version list below for details.
dotnet add package Joy.Then --version 0.0.2
NuGet\Install-Package Joy.Then -Version 0.0.2
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Joy.Then" Version="0.0.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Joy.Then --version 0.0.2
#r "nuget: Joy.Then, 0.0.2"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Joy.Then as a Cake Addin
#addin nuget:?package=Joy.Then&version=0.0.2

// Install Joy.Then as a Cake Tool
#tool nuget:?package=Joy.Then&version=0.0.2

Inspired by syntactic sugar for Swift initializers: Then

不同点,在C#中

  • 闭包(或称为lambda表达式)中的参数必须显式地通过参数名称来引用,没有类似于Swift中闭包(closure)的$0、$1等语法来直接引用闭包内的参数。
  • 没有像Swift中一样的inout参数修饰符,类似的ref修饰符在结合委托使用时也很繁琐(调用时必须显式写出(ref T t) => { ... }),还不如就将委托从Action替换为Func。
  • Then、With扩展相比使用对象初始化器(Object Initializers)、with表达式(With Expression)的优势
    • 不一定要直接在对象初始化时使用,初始化后可任意调用
    • StackTrace中源码位置指示(行号)更准确
    • 不止可以给属性/字段赋值,还可以调用方法等
  • Object Initializers的主要作用在于对象的完整性,防止出现未初始化完全的状态。

使用示例

public record struct Person
{
    public string Name { get; set; }
    public int Age;

    public Person(string Name, int Age)
    {
        this.Name = Name;
        this.Age = Age;
    }

    public void Work() { }
}
var lisi = new Person().With(x => 
    {
        x.Name = NullName[0..1];    
        x.Age = int.Parse("abc");

        x.Work();
        return x;
    });
lisi.Do(x => x.Work());
var output = new StringBuilder().Then(x => x.Append("joy")).ToString();

对比

alternate text is missing from this package README image alternate text is missing from this package README image alternate text is missing from this package README image

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

NuGet packages (1)

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Package Downloads
Joy.Base

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Version Downloads Last updated
0.0.5.1 98 4/30/2024
0.0.5 439 4/20/2024
0.0.4 82 4/20/2024
0.0.3 83 4/20/2024
0.0.2 79 4/20/2024
0.0.1 86 4/20/2024
0.0.1-preview 72 3/23/2024