ikeys - nodef/extra-array GitHub Wiki
List all indices.
Alternatives: ikeys, keys.
Similar: keys, values, entries.
function ikeys(x)
// x: an array
const xarray = require('extra-array');
var x = [1, 2, 3];
[...xarray.ikeys(x)];
// → [ 0, 1, 2 ]
References