swap$

Exchange two values.

Alternatives: swap, swap$.

function swap$(x, i, j)
// x: an array (updated)
// i: an index
// j: another index

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, 3);
// → [ 4, 2, 3, 1 ]

References

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