best way to do a for loop with for each loop? - javascript

Question

Is there a good way to do a for loop with a for each loop in javascript?

I want to make a for loop in one line.

score 3 · Answer 1 · answered Sep 20 '17 at 19:10

3

Or ....

Array(9).fill(0).forEach((_,i) => console.log(i));

answered Sep 20 '17 at 19:10

adeneo

Its a good code. But could you explain those fill and `_` and all? – jafarbtech Sep 20 '17 at 19:36
1

`Array.fill` just fills the array with zeroes so it can be iterated, and the underscore is just "filler" for the uneeded argument, I just used `_` instead of your `e` – adeneo Sep 20 '17 at 20:49

Matias Dominguez · Answer 2 · 2017-09-20T19:06:24.450

0

Try this:

(new Array(int + 1).join("0").split("")).forEach((e, i) => {console.log(i);})

int means iterate times

edited Sep 20 '17 at 19:06

answered Sep 20 '17 at 19:00

Matias Dominguez

Why do you add 2? – Barmar Sep 20 '17 at 19:01
@Barmar i fix that, it should be 1, because when you join you lost 1 item. – Matias Dominguez Sep 20 '17 at 19:08
This is almost as bad as `String(Math.pow(10, int)).match(/\d/g).forEach(...)`. – Sep 20 '17 at 19:27

2 Answers2