group

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Subhajit Sahu edited this page May 17, 2020 · 26 revisions

Keeps similar values together and in order. 🏃 📼 📦 🌔 📒

Alternatives: compare, map.

iterable.group(x, [fc], [fm]);
// x:  an iterable
// fc: compare function (a, b)
// fm: map function (v, i, x)

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

var x = [1, 2, 2, -2, -2, 4];
[...iterable.group(x)];
// [ [ 1 ], [ 2, 2 ], [ -2, -2 ], [ 4 ] ]

[...iterable.group(x, (a, b) => Math.abs(a) - Math.abs(b))];
// [ [ 1 ], [ 2, 2, -2, -2 ], [ 4 ] ]

references