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// Copyright (c) 2020 Jozty. All rights reserved. MIT license.
import curryN from './utils/curry_n.ts';import type { PH } from './utils/types.ts';import { reduce } from './reduce.ts';import { concat } from './concat.ts';import { map } from './map.ts';
type Chain_2<T, R> = (g: T[]) => R[];
type Chain_1<T> = <R>(f: (a: T) => R[]) => R[];
type Chain =  & (<T, R>(f: (a: T) => R[]) => Chain_2<T, R>)  & (<T>(f: PH, g: T[]) => Chain_1<T>)  & (<T, R>(f: (a: T) => R[], g: T[]) => R[]);
function _chain<T, R>(fun: (a: T) => R, list: ArrayLike<T>): R[] {  // @ts-ignore  return reduce(concat, [], map(fun, list));}
export const chain: Chain = curryN(2, _chain);