swap$

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Subhajit Sahu edited this page Dec 8, 2022 · 12 revisions

Exchange two values in an object.

Alternatives: swap, swap$.
Similar: get, set, swap, remove.

function swap$(x, k, l)
// x: an object (updated)
// k: a key
// l: another key

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

var x = {a: 1, b: 2, c: 3, d: 4};
object.swap$(x, 'a', 'b');
// → { a: 2, b: 1, c: 3, d: 4 }

x;
// → { a: 2, b: 1, c: 3, d: 4 }

var x = {a: 1, b: 2, c: 3, d: 4};
object.swap$(x, 'a', 'd');
// → { a: 4, b: 2, c: 3, d: 1 }

References