swap$

Exchanges two values. 🏃 📦 🌔

Alternatives: default, update.

array.swap$(x, i, j);
// x: an array (updated)
// i: an index
// j: another index
// --> x

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

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

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

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

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

references

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