difference

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Subhajit Sahu edited this page May 10, 2020 · 28 revisions

Gives values of an iterable not present in another. 🏃 📼 📦 🌔

Alternatives: compare, map.

iterable.difference(x, y, [fn]);
// x:  an iterable
// y:  another iterable
// fn: compare function (a, b)

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

var x = [1, 2, 3, 4, 5];
var y = [2, 4];
[...iterable.difference(x, y)];
// [ 1, 3, 5 ]

var y = [-2, -4];
[...iterable.difference(x, y)];
// [ 1, 2, 3, 4, 5 ]

[...iterable.difference(x, y, (a, b) => Math.abs(a) - Math.abs(b))];
// [ 1, 3, 5 ]

references