来自元组的 JavaScript 变量赋值

2022-01-19 00:00:00 tuples javascript destructuring

在 Python 2 和 Python 3 等其他语言中，您可以定义元组变量并为其赋值，然后像这样检索它们的值:

In other languages like Python 2 and Python 3, you can define and assign values to a tuple variable, and retrieve their values like this:

tuple = ("Bob", 24)
name, age = tuple
print(name)           #name evaluates to Bob
print(age)            #age evaluates to 24

在 JavaScript 中有没有类似的东西?还是我只需要使用数组以丑陋的方式来做:

Is there anything similar in JavaScript? Or do I just have to do it the ugly way with an array:

tuple = ["Bob", 24]
name = tuple[0]       //name Evaluates to Bob
age = tuple[1]        //age Evaluates to 24

有没有更好的方法在 JavaScript 5 中模拟 Python 元组?

Is there a better way to simulate Python tuples in JavaScript 5?

更新:请参阅有关 ES6 的答案，对于新项目，它应该比 CoffeeScript 更受青睐.

Update: See the answer regarding ES6, which should be favored over CoffeeScript for new projects.

推荐答案

添加了 Javascript 1.7 解构赋值 让你基本上可以做你想做的事.

Javascript 1.7 added destructuring assignment which allows you to do essentially what you are after.

function getTuple(){
   return ["Bob", 24];
}
var [a, b] = getTuple();
// a === "bob" , b === 24 are both true

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