partition
Splits the collection into two collections, containing the elements for which the given predicate returns True and False respectively. Element order is preserved in both of the created lists.
Returns
A function that takes an array of elements of type T as an argument and returns a tuple of two arrays of elements of type T. The first array in the tuple contains the elements of the input array that satisfy the predicate function, and the second array contains the elements that do not satisfy the predicate.
Type
type partition = <T>(predicate: ((item: T) => boolean)) => (array: T[]) => [T[], T[]]Examples
import {partition} from 'fnxt/array';
const partitionSmall = partition(x => x < 4);
const result = partitionSmall([1, 2, 3, 4, 5, 6, 7])
console.log(result);
// Output: [[1, 2, 3], [4, 5, 6, 7]]import {partition} from 'fnxt/array';
const isLongWord = (x: string) => x.length >= 5;
const partitionLongShort = partition(isLongWord);
const result = partitionLongShort(['hello', 'world', 'foo', 'bar']);
console.log(result);
// Output: [['hello', 'world'], ['foo', 'bar']]import {partition} from 'fnxt/array';
const isEven = (x: number) => x % 2 === 0;
const partitionEvenOdd = partition(isEven);
const result = partitionEvenOdd([1, 2, 3, 4, 5]);
console.log(result);
// Output: [[2, 4], [1, 3, 5]]