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isUnique
Subhajit Sahu edited this page Feb 3, 2021
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23 revisions
Checks if there are no duplicate values. 🏃 📼 📦 🌔 📒
Alternatives: unique, isUnique.
Similar: isUnique, isDisjoint, intersection.
iterable.isUnique(x, [fc], [fm]);
// x: an iterable
// fc: compare function (a, b)
// fm: map function (v, i, x)⏱️ Compare function => O(n²).
const iterable = require("extra-iterable");
var x = [1, 2, -1, -2];
iterable.isUnique(x);
// true
iterable.isUnique(x, (a, b) => Math.abs(a) - Math.abs(b));
// false
iterable.isUnique(x, null, v => Math.abs(v));
// false