| 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; |