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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 | 8x 8x 9x 2x 8x 8x 8x 7x 8x 8x | import { purry } from './purry'; /** * Gets the first element of `array`. * Note: In `pipe`, use `first()` form instead of `first`. Otherwise, the inferred type is lost. * @param array the array * @signature * P.first(array) * @example * P.first([1, 2, 3]) // => 1 * P.first([]) // => undefined * P.pipe( * [1, 2, 4, 8, 16], * P.filter(x => x > 3), * P.first(), * x => x + 1 * ); // => 5 * * @category Array, Pipe */ export function first<T>(array: readonly T[]): T | undefined; export function first<T>(): (array: readonly T[]) => T | undefined; export function first<T>(defaultValue: T): (array: readonly T[]) => T; export function first() { return purry(_first, arguments, first.lazy); } function _first<T>(array: T[]) { return array[0]; } export namespace first { export function lazy<T>() { return (value: T) => { return { done: true, hasNext: true, next: value, }; }; } export namespace lazy { export const single = true; } } |