group

Breaks array keeping similar values together. 🏃 📼 📦 🌔 📒

Similar: group, partition.

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

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

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

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

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

references

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