all.ts

// Copyright (c) 2020 Jozty. All rights reserved. MIT license.

import curryN from './utils/curry_n.ts';
import type { PH, Predicate1 } from './utils/types.ts';
import { dispatch } from './utils/dispatch.ts';
import AllTransformer from './utils/Transformers/all.ts';

// @types
type All_2<T> = (functor: ArrayLike<T>) => boolean;

type All_1<T> = (predicate: Predicate1<T>) => boolean;

type All =
  & (<T>(predicate: Predicate1<T>) => All_2<T>)
  & (<T>(predicate: PH, functor: ArrayLike<T>) => All_1<T>)
  & (<T>(predicate: Predicate1<T>, functor: ArrayLike<T>) => boolean);

function _all<T>(predicate: Predicate1<T>, functor: ArrayLike<T>) {
  let index = 0;
  while (index < functor.length) {
    if (!predicate(functor[index])) {
      return false;
    }
    index++;
  }
  return true;
}

const dispatchedAll = dispatch(AllTransformer, _all);

/**
 * Return `true` if all the elements of the functor match `predicate`
 * `false` otherwise
 *
 * Acts as a transducer if a transformer is passed in place of `functor`
 */
export const all = curryN(2, dispatchedAll) as All;