将Coffeescript循环使用范围转换为ES6 [英] Turn Coffeescript loop using range into ES6

问题描述

免责声明：我不知道Coffeescript，虽然我感谢它对ES6规格做出了贡献，但我迫不及待地看到了它。

Disclaimer: I don't know Coffeescript and, although I appreciate it has contributed towards the ES6 spec, I can't wait to see the back it.

这个Coffeescript循环（由别人写）

This Coffeescript loop (wrote by someone else)

if @props.total>1
  for page in [[e-mail]]
    active = (page is [e-mail])

根据 js2coffee ，相当于这个JS

var active, i, page, ref;

if (this.props.total > 1) {
  for (page = i = 1, ref = this.props.total; 1 <= ref ? i <= ref : i >= ref; page = 1 <= ref ? ++i : --i) {
    active = page === +this.props.current;
  }
}

现在我想使用一个 for..of 循环来缩短JS，但我无法弄清楚如何。

Now I would like to use a for..of loop to shorten that JS, but I can't figure out how.

我试图实现<一个href =http://davidarvelo.com/blog/array-number-range-sequences-in-javascript-es6/ =nofollow>这个想法（底部的生成函数位）但是我不能正确的。

I've tried to implement this idea(the generator function bit at the bottom), but I can't get it right.

我的问题是：有没有办法在ES6中制作范围？

My question is: Is there a way of making ranges in ES6?

推荐答案

您正在寻找的生成器解决方案是

The generator solution you are looking for would be

function* range(i, end=Infinity) {
    while (i <= end) {
        yield i++;
    }
}

// if (this.props.total > 1) - implicitly done by `range`
for (let page of range(1, this.props.total) {
    active = page === +this.props.current;
}

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