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					57 lines
				
				1.8 KiB
			
		
		
			
		
	
	
					57 lines
				
				1.8 KiB
			| 
											3 years ago
										 | 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; |