javascript - 如何创建一个包含1…N的数组(How to create an array containing 1…N)

Question

I'm looking for any alternatives to the below for creating a JavaScript array containing 1 through to N where N is only known at runtime.

(我正在寻找以下所有替代方案，以创建一个包含1到N的JavaScript数组，其中N仅在运行时才知道。)

var foo = [];

for (var i = 1; i <= N; i++) {
   foo.push(i);
}

To me it feels like there should be a way of doing this without the loop.

(在我看来，应该有一种没有循环的方法。)

  ask by Godders translate from so

Answer 1

In ES6 using Array from() and keys() methods.

(在ES6中，使用Array from（）和keys（）方法。)

Array.from(Array(10).keys())
//=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Shorter version using spread operator .

(使用传播算子的较短版本。)

[...Array(10).keys()]
//=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]