swap

Exchanges two values.

Alternatives: default, update.

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

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

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

iterable.swap(x, 0, -1);
// [4, 2, 3, 1]

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

references

• Collections.swap(): Java
• pure-swap: @alferov
• List-Extra.swapAt(): elm