unique

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wolfram77 edited this page Mar 31, 2020 · 25 revisions

Removes duplicate values.

Alternatives: compare, map.

array.unique(x, [fn]);
// x:  an array
// fn: compare function (a, b)

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

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

var x = [1, 2, 3, 4, -2, -3];
array.unique(x, (a, b) => Math.abs(a) - Math.abs(b));
// [1, 2, 3, 4]

references