| var arrayEvery = require('./_arrayEvery'), |
| baseEvery = require('./_baseEvery'), |
| baseIteratee = require('./_baseIteratee'), |
| isArray = require('./isArray'), |
| isIterateeCall = require('./_isIterateeCall'); |
| |
| /** |
| * Checks if `predicate` returns truthy for **all** elements of `collection`. |
| * Iteration is stopped once `predicate` returns falsey. The predicate is |
| * invoked with three arguments: (value, index|key, collection). |
| * |
| * **Note:** This method returns `true` for |
| * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because |
| * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of |
| * elements of empty collections. |
| * |
| * @static |
| * @memberOf _ |
| * @since 0.1.0 |
| * @category Collection |
| * @param {Array|Object} collection The collection to iterate over. |
| * @param {Function} [predicate=_.identity] The function invoked per iteration. |
| * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. |
| * @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', 'age': 36, 'active': false }, |
| * { 'user': 'fred', 'age': 40, 'active': false } |
| * ]; |
| * |
| * // The `_.matches` iteratee shorthand. |
| * _.every(users, { 'user': 'barney', 'active': false }); |
| * // => false |
| * |
| * // The `_.matchesProperty` iteratee shorthand. |
| * _.every(users, ['active', false]); |
| * // => true |
| * |
| * // The `_.property` iteratee shorthand. |
| * _.every(users, 'active'); |
| * // => false |
| */ |
| function every(collection, predicate, guard) { |
| var func = isArray(collection) ? arrayEvery : baseEvery; |
| if (guard && isIterateeCall(collection, predicate, guard)) { |
| predicate = undefined; |
| } |
| return func(collection, baseIteratee(predicate, 3)); |
| } |
| |
| module.exports = every; |