var arrayEvery = require('../internal/arrayEvery'), baseCallback = require('../internal/baseCallback'), baseEvery = require('../internal/baseEvery'), isArray = require('../lang/isArray'), isIterateeCall = require('../internal/isIterateeCall'); /** * Checks if `predicate` returns truthy for **all** elements of `collection`. * The predicate is bound to `thisArg` and invoked with three arguments: * (value, index|key, collection). * * If a property name is provided for `predicate` the created `_.property` * style callback returns the property value of the given element. * * If a value is also provided for `thisArg` the created `_.matchesProperty` * style callback returns `true` for elements that have a matching property * value, else `false`. * * If an object is provided for `predicate` the created `_.matches` style * callback returns `true` for elements that have the properties of the given * object, else `false`. * * @static * @memberOf _ * @alias all * @category Collection * @param {Array|Object|string} collection The collection to iterate over. * @param {Function|Object|string} [predicate=_.identity] The function invoked * per iteration. * @param {*} [thisArg] The `this` binding of `predicate`. * @returns {boolean} Returns `true` if all elements pass the predicate check, * else `false`. * @example * * _.every([true, 1, null, 'yes'], Boolean); * // => false * * var users = [ * { 'user': 'barney', 'active': false }, * { 'user': 'fred', 'active': false } * ]; * * // using the `_.matches` callback shorthand * _.every(users, { 'user': 'barney', 'active': false }); * // => false * * // using the `_.matchesProperty` callback shorthand * _.every(users, 'active', false); * // => true * * // using the `_.property` callback shorthand * _.every(users, 'active'); * // => false */ function every(collection, predicate, thisArg) { var func = isArray(collection) ? arrayEvery : baseEvery; if (thisArg && isIterateeCall(collection, predicate, thisArg)) { predicate = undefined; } if (typeof predicate != 'function' || thisArg !== undefined) { predicate = baseCallback(predicate, thisArg, 3); } return func(collection, predicate); } module.exports = every;