Post

Javascript Create Array From 1 to N

Javascript Create Array From 1 to N

How to create an array containing 1…N

1
2
Array.from(Array(10).keys());
// => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
1
2
[...Array(10).keys()]
// => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
1
2
Array.from({length: 10}, (_, i) => i + 1)
//=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
1
[...Array(N+1).keys()].slice(1)

spread operator (…)

1
var foo = Array(N).fill().map((v,i)=>i);

even:

1
Array.from({length: 10}, (_, i) => i * 2);
This post is licensed under CC BY 4.0 by the author.