访问F#元组中的特定成员 [英] Accessing a specific member in a F# tuple

问题描述

在F#代码中，我有一个元组:

In F# code I have a tuple:

let myWife=("Tijana",32)

我想分别访问元组的每个成员.例如，这是我无法实现的目标

I want to access each member of the tuple separately. For instance this what I want to achieve by I can't

Console.WriteLine("My wife is {0} and her age is {1}",myWife[0],myWife[1])

此代码显然无效，因为我认为您可以收集我想要实现的目标.

This code doesn't obviously work, by I think you can gather what I want to achieve.

推荐答案

您想通过使其年龄不变来防止妻子衰老吗? :)

You want to prevent your wife from aging by making her age immutable? :)

对于仅包含两个成员的元组，可以使用fst和snd提取该对中的成员.

For a tuple that contains only two members, you can fst and snd to extract the members of the pair.

let wifeName = fst myWife;
let wifeAge = snd myWife;

对于更长的元组，您必须将元组解压缩为其他变量.例如，

For longer tuples, you'll have to unpack the tuple into other variables. For instance,

let _, age = myWife;;
let name, age = myWife;;

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