F＃ - 什么是数组<'T>？ [英] F# - What is array<'T>?

问题描述

在这个上一个问题中我了解到，在F＃ 数组<'T> 与 System.Array 不同。

In this previous question I learnt that in F# an array<'T> is not the same as System.Array.

VS告诉我，数组<'T> 继承 System.Array 并具有全名 Microsoft.FSharp.Core.array< _> 和一些额外的接口。

VS tells me that array<'T> inherits System.Array and has the full name Microsoft.FSharp.Core.array<_> and some additional Interfaces.

然而 MSDN 表示 array<'T> 是 System.Array 的类型缩写。而且它有符号 arr。[i] 来获取和设置项目。

However MSDN says that array<'T> is a type abbreviation of System.Array. And that it has the notation arr.[i] to get and set items.

所以对于我的教训，是数组<'T> 类型缩写，包括类型扩展名和附加接口？

So for my lesson, is array<'T> a type abbreviation that includes type extensions and additional Interfaces? Where is the best place to look this up ?

推荐答案

类型 array<'T> 是一个缩写，但不是基础类型 System.Array ，而是用于表示F＃中的数组的另一个泛型类型，写为$ code>'T [] 。

The type array<'T> is an abbreviation, but not for the base type System.Array but for another generic type that represents arrays in F#, which is written as 'T[].

这意味着

• System.Array 是非通用基类型（不能使用索引，您只能将元素作为对象）

• System.Array is the non-generic base type (where you cannot use indexing and you can only get elements as objects)

'T [] 和数组<'T> 完全一样的事情它们是支持索引的通用类型，您可以从中获取'T 值。

'T[] and array<'T> mean exactly the same thing. They are the generic type which supports indexing and you get 'T values from it.

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