partition

Segregates values by test result. 🏃 📼 📦 🌔 📒

Alternatives: partition, partitionAs.
Similar: count, partition.

iterable.partition(x, ft);
// x:  an iterable
// ft: test function (v, i, x)
// --> [satisfies, doesnt]

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

var x = [1, 2, 3, 4];
iterable.partition(x, v => v % 2 == 0);
// [ [ 2, 4 ], [ 1, 3 ] ]

var x = [1, 2, 3, 4, 5];
iterable.partition(x, v => v % 2 == 1);
// [ [ 1, 3, 5 ], [ 2, 4 ] ]

references

• Data.List.partition: Haskell