如何在 F# 中引用任意大小的元组的特定成员 [英] How can I refer to a specific member of a Tuple of any size in F#

问题描述

好吧，这可能是一个愚蠢的问题.

okay, this might be a silly question.

所以我有一些大小为 4 的元组，例如 (int,int,int,int)

So I have some tuples of size 4 so like (int,int,int,int)

如果它是一个 2 元组，我可以使用 fst(myTuple) 来引用第一个元素.比如说，我怎么能引用 4 元组的第三个元素?

If it were a 2 tuple I could use fst(myTuple) to refer to the first element. How could I, say, refer to the third element of a 4 tuple?

推荐答案

使用模式匹配:

let tup = 1, 2, 3, 4
let _,_,third,_ = tup
printfn "%d" third // displays "3"

这在元组的 MSDN 文档中直接描述:元组 (F#)

This is described directly in the MSDN documentation for tuples: Tuples (F#)

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