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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 | 9x 9x 5x 5x 5x 5x | import { purry } from './purry'; /** * Splits a given array at a given index. * @param array the array to split * @param index the index to split at * @signature * P.splitAt(array, index) * @example * P.splitAt([1, 2, 3], 1) // => [[1], [2, 3]] * P.splitAt([1, 2, 3, 4, 5], -1) // => [[1, 2, 3, 4], [5]] * @data_first * @category Array */ export function splitAt<T>(array: readonly T[], index: number): [T[], T[]]; /** * Splits a given array at a given index. * @param array the array to split * @param index the index to split at * @signature * P.splitAt(index)(array) * @example * P.splitAt(1)([1, 2, 3]) // => [[1], [2, 3]] * P.splitAt(-1)([1, 2, 3, 4, 5]) // => [[1, 2, 3, 4], [5]] * @data_last * @category Array */ export function splitAt<T>(index: number): (array: readonly T[]) => [T[], T[]]; export function splitAt() { return purry(_splitAt, arguments); } function _splitAt<T>(array: T[], index: number) { const copy = [...array]; const tail = copy.splice(index); return [copy, tail]; } |