Skip to main content
Module

x/ramda/allPass.js

:ram: Practical functional Javascript
Very Popular
Go to Latest
File
import _curry1 from './internal/_curry1';import curryN from './curryN';import max from './max';import pluck from './pluck';import reduce from './reduce';

/** * Takes a list of predicates and returns a predicate that returns true for a * given list of arguments if every one of the provided predicates is satisfied * by those arguments. * * The function returned is a curried function whose arity matches that of the * highest-arity predicate. * * @func * @memberOf R * @since v0.9.0 * @category Logic * @sig [(*... -> Boolean)] -> (*... -> Boolean) * @param {Array} predicates An array of predicates to check * @return {Function} The combined predicate * @see R.anyPass * @example * * const isQueen = R.propEq('rank', 'Q'); * const isSpade = R.propEq('suit', '♠︎'); * const isQueenOfSpades = R.allPass([isQueen, isSpade]); * * isQueenOfSpades({rank: 'Q', suit: '♣︎'}); //=> false * isQueenOfSpades({rank: 'Q', suit: '♠︎'}); //=> true */var allPass = _curry1(function allPass(preds) { return curryN(reduce(max, 0, pluck('length', preds)), function() { var idx = 0; var len = preds.length; while (idx < len) { if (!preds[idx].apply(this, arguments)) { return false; } idx += 1; } return true; });});export default allPass;