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

问题描述

在此 previous问题我学会了在F＃的阵列＆LT;'T＆GT; 是不一样的的System.Array

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

VS告诉我，阵列＆LT;'T＆GT; 继承的System.Array 并拥有全名 Microsoft.FSharp.Core.array＆LT; _＆GT; 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.

不过 MSDN 说，阵列＆LT; T＆GT; 是的System.Array 的类型缩写。并且它具有符号编曲。[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.

因此​​，对于我的教训，为阵列＆LT;'T＆GT; A型的缩写，包括类型扩展更多的接口？哪里是看这件事最好的地方？

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

类型阵列＆LT;'T＆GT; 是一个缩写，但不是为盐基型的的System.Array 但是对于重新presents阵列F＃中的另一个泛型类型，它写成'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

• 的System.Array 是非通用基本类型（在这里你不能使用索引，你只能得到元素为对象）

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

'T [] 和阵列＆LT;'T＆GT; 意思完全一样的东西。他们是支持索引泛型类型，你从它那里得到'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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