swap$

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Subhajit Sahu edited this page May 3, 2023 · 23 revisions

Exchange two values!

Alternatives: swap, swap$.

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

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

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

x;
// → [ 2, 1, 3, 4 ]

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

References