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isUnique
wolfram77 edited this page Mar 27, 2020
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23 revisions
Checks if there are no duplicate values.
iterable.isUnique(x, [fn]);
// x: an iterable
// fn: compare function (a, b)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