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							56 lines
						
					
					
						
							1.8 KiB
						
					
					
				
			
		
		
	
	
							56 lines
						
					
					
						
							1.8 KiB
						
					
					
				var arrayEvery = require('./_arrayEvery'), | 
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    baseEvery = require('./_baseEvery'), | 
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    baseIteratee = require('./_baseIteratee'), | 
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    isArray = require('./isArray'), | 
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    isIterateeCall = require('./_isIterateeCall'); | 
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 | 
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/** | 
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 * Checks if `predicate` returns truthy for **all** elements of `collection`. | 
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 * Iteration is stopped once `predicate` returns falsey. The predicate is | 
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 * invoked with three arguments: (value, index|key, collection). | 
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 * | 
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 * **Note:** This method returns `true` for | 
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 * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because | 
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 * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of | 
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 * elements of empty collections. | 
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 * | 
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 * @static | 
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 * @memberOf _ | 
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 * @since 0.1.0 | 
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 * @category Collection | 
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 * @param {Array|Object} collection The collection to iterate over. | 
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 * @param {Function} [predicate=_.identity] The function invoked per iteration. | 
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 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. | 
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 * @returns {boolean} Returns `true` if all elements pass the predicate check, | 
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 *  else `false`. | 
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 * @example | 
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 * | 
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 * _.every([true, 1, null, 'yes'], Boolean); | 
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 * // => false | 
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 * | 
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 * var users = [ | 
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 *   { 'user': 'barney', 'age': 36, 'active': false }, | 
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 *   { 'user': 'fred',   'age': 40, 'active': false } | 
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 * ]; | 
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 * | 
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 * // The `_.matches` iteratee shorthand. | 
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 * _.every(users, { 'user': 'barney', 'active': false }); | 
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 * // => false | 
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 * | 
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 * // The `_.matchesProperty` iteratee shorthand. | 
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 * _.every(users, ['active', false]); | 
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 * // => true | 
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 * | 
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 * // The `_.property` iteratee shorthand. | 
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 * _.every(users, 'active'); | 
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 * // => false | 
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 */ | 
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function every(collection, predicate, guard) { | 
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  var func = isArray(collection) ? arrayEvery : baseEvery; | 
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  if (guard && isIterateeCall(collection, predicate, guard)) { | 
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    predicate = undefined; | 
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  } | 
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  return func(collection, baseIteratee(predicate, 3)); | 
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} | 
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 | 
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module.exports = every;
 | 
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 |