为什么Math.prototype未定义？ [英] Why is Math.prototype undefined?

问题描述

我必须在这里遗漏一些东西，因为 Math.prototype 是我未定义。为什么是这样？我尝试过这样的事情：

I must be missing something here, because Math.prototype is undefined for me. Why is this? I tried to do something like this:

Math.prototype.randomRange = function(from, to){
    return Math.floor(Math.random() * (to - from + 1) + from);
}

但不得不这样做：

Math.randomRange = function(from, to){
    return Math.floor(Math.random() * (to - from + 1) + from);
}

但这感觉不对。是我还是应该以另一种方式做这件事？如果这是一个愚蠢或重复的问题，我道歉，但我找不到任何搜索结果（当我搜索Math.prototype时，正好有两个问题出现，这有点奇怪）。

That doesn't feel right, though. Is it just me or should I be doing this another way? I apologize if this is a silly or duplicate question, but I couldn't find anything by searching (exactly two questions turn up when I search SO for "Math.prototype", which is kind of weird).

推荐答案

Math 函数与其他OO语言中的类级函数类似。构造函数上没有原型对象;没人（我知道）无论如何都使用了构造函数。 （你会用 Math 实例做什么？）

The Math functions are like class-level functions in other OO languages. There's no prototype object on the constructor; nobody (I know of) uses the constructor anyway. (What would you do with a Math instance?)

编辑—它已在评论中指出（我从未想过要检查我猜）数学无论如何都不是一个函数。在浏览器控制台中键入 Math（），您将收到错误。

edit — it's been pointed out in a comment (and it never occurred to me to check I guess) that Math isn't a function anyway. Type Math() in your browser console and you'll get an error.

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