Segregates values by test result. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

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

This is part of package extra-array.

array.partition(x, ft);
// x:  an array
// ft: test function (v, i, x)
// → [satisfies, doesnt]

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

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

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

References

• Data.List.partition: Haskell