partitionAs

Segregates values by similarity.

Alternatives: partition, partitionAs.

function partitionAs(x, fm)
// x:  a set
// fm: map function (v, v, x)

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

var x = new Set([1, 2, 3, 4]);
set.partitionAs(x, v => v % 2 === 0);
// → Map(2) { false => Set(2) { 1, 3 }, true => Set(2) { 2, 4 } }

var x = new Set([1, 2, 3, 4, 5]);
set.partitionAs(x, v => v % 3);
// → Map(3) {
// →   1 => Set(2) { 1, 4 },
// →   2 => Set(2) { 2, 5 },
// →   0 => Set(1) { 3 }
// → }

References

• Data.List.partition: Haskell