swap

Exchanges two values. [:running:] [:vhs:] [:package:] [:moon:]

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, 3)];
// [4, 2, 3, 1]

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

references

• Collections.swap(): Java
• pure-swap: @alferov
• List-Extra.swapAt(): elm [:running:]: https://npm.runkit.com/@extra-iterable/swap [:vhs:]: https://asciinema.org/a/EU8HavAAkEwmkH9Eteb8Sj9Bx [:package:]: https://www.npmjs.com/package/@extra-iterable/swap [:moon:]: https://www.npmjs.com/package/@extra-iterable/swap.min