swap

Exchanges two values. 🏃 📼 📦 🌔

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 ]

references

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