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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | 8x 8x 2x 8x 2x 2x 2x 16x 16x 4x 4x 4x 12x 12x 2x | import { purry } from './purry';
import { Pred } from './_types';
import { _toLazyIndexed } from './_toLazyIndexed';
/**
* Filter the elements of an array that meet the condition specified in a callback function.
* @param array The array to filter.
* @param fn the callback function.
* @signature
* P.filter(array, fn)
* @signature
* P.filter(fn)(array)
* @example
* P.filter([1, 2, 3], x => x % 2 === 1) // => [1, 3]
*
* P.pipe([1, 2, 3], P.filter(x => x % 2 === 1)) // => [1, 3]
* @category Array, Pipe
*/
export function partition<T, S extends T>(
array: readonly T[],
fn: (value: T) => value is S
): [S[], Exclude<T, S>[]];
export function partition<T>(array: readonly T[], fn: Pred<T, boolean>): T[];
export function partition<T, S extends T>(
fn: (input: T) => input is S
): (array: readonly T[]) => [S[], Exclude<T, S>[]];
export function partition<T>(fn: Pred<T, boolean>): (array: readonly T[]) => [T[], T[]];
export function partition() {
return purry(_partition(), arguments);
}
export type PredIndexed<T, K> = (
input: T,
index: number,
array: readonly T[]
) => K;
const _partition = () => <T>(
array: T[],
fn: (
input: T,
index: number,
array: readonly T[]
) => any
) => {
let right = []
let left = []
let index = 0
for (const s of array) {
if (fn(s, index, array)) {
index++
right.push(s)
continue
}
index++
left.push(s)
}
return [right, left]
}; |