为什么元组的项目是只读？ [英] Why Tuple's items are ReadOnly?

问题描述

我想用元组类来存储2的整数信息（StartAddress开始，EndAddress）我需要在我的程序。

I was thinking to use Tuple class to store 2 integer information (StartAddress, EndAddress) I need in my program.

不过，我发现，元组项目是只读的，所以如果我需要设置一个值，一个项目，我需要重新实例化一个元组。

But I discover that Tuple items are ReadOnly, so if I need to set a value for an item, I need to re-instantiate a Tuple.

这是什么设计决定背后的原因是什么？

What is the reason behind this design decision?

推荐答案

元组起源于函数式编程。在（纯）函数式编程，所有的是不可改变的设计 - 某个变量只有在任何时候都一个单一的定义，如数学。在.NET设计师明智地遵循了同样的原则，在功能风格融入C＃/。NET，尽管它最终是一个主要的当务之急（混合型？）的语言。

Tuples originated in functional programming. In (purely) functional programming, everything is immutable by design - a certain variable only has a single definition at all times, as in mathematics. The .NET designers wisely followed the same principle when integrating the functional style into C#/.NET, despite it ultimately being a primarily imperative (hybrid?) language.

注：虽然我怀疑的是，元组是不可变的并没有真正让你的任务更难，也有匿名类型（或者只是一个简单的结构），你可能想使用

Note: Though I suspect the fact that tuples are immutable doesn't really make your task much harder, there are also anonymous types (or perhaps just a simple struct) you might want to use.

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