swap - nodef/extra-iterable GitHub Wiki

Exchange two values.

function swap(x, i, j)
// x: an iterable
// i: an index
// j: another index

const xiterable = require('extra-iterable');

var x = [1, 2, 3, 4];
[...xiterable.swap(x, 0, 1)];
// → [2, 1, 3, 4]

[...xiterable.swap(x, 0, 3)];
// → [4, 2, 3, 1]

References