Javascript Array range

Question

I find my self using _.range a lot, and sometimes I don't want to drag with me lodash just for that reason.

What is the best way to do this without lodash?

My best solution is:

   export function range(n) {
     return new Array(n).fill(0).map((a, i) => i);
   }

I don't know if this counts as an answer, so I'm posting as a comment, but you can import [`lodash.range`](https://www.npmjs.com/package/lodash.range) as a standalone module without the rest of `lodash`. — Patrick Roberts, Feb 20 '18 at 19:19

score 4 · Accepted Answer · answered Feb 20 '18 at 19:10

4

 return Array.from({length: n}, (_, i) => i);

...saves a few bytes.

answered Feb 20 '18 at 19:10

Jonas Wilms

3

Just a reminder, this is ES6+ only – João Menighin Feb 20 '18 at 19:12
2

Not only does this save bytes, it saves an iteration of the array compared to the approach in the question. – Patrick Roberts Feb 20 '18 at 19:18

1 Answers1