partition

function Array.partition<T>(
    target: readonly T[],
    predicate: (
        value: NoInfer<T>,
        index: number,
        target: readonly NoInfer<T>[],
    ) => boolean,
): [T[], T[]]

Splits array into two arrays based on the predicate function, returning a tuple where the first array contains elements that satisfy the predicate and the second contains those that don't.

Example

data-first

import { Array } from "@monstermann/array";

Array.partition([1, 2, 3, 4, 5], (x) => x % 2 === 0); // [[2, 4], [1, 3, 5]]

data-last

import { Array } from "@monstermann/array";

pipe(
    [1, 2, 3, 4, 5],
    Array.partition((x) => x % 2 === 0),
); // [[2, 4], [1, 3, 5]]