Breaks array keeping similar values together. :running: :vhs: :package: :moon:

Alternatives: compare, map. This is part of package extra-array.

array.groupOn(x, [fn], [ths]);
// x:   an array
// fn:  map function (v, i, x)
// ths: this argument

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

var x = [1, 2, 2, -2, -2, 4];
array.groupOn(x);
// [[1], [2, 2], [-2, -2], [4]]

array.groupOn(x, v => Math.abs(v));
// [[1], [2, 2, -2, -2], [4]]

references

• Data.List.groupBy: Haskell
• List-Extra.group: elm
• List-Extra.groupWhile: elm