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/**
* Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
* Build: `lodash modularize underscore exports="node" -o ./underscore/`
* Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
* Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
* Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
* Available under MIT license <http://lodash.com/license>
*/
var filter = require('./filter'),
find = require('./find'),
isEmpty = require('../objects/isEmpty');
/**
* Performs a deep comparison of each element in a `collection` to the given
* `properties` object, returning an array of all elements that have equivalent
* property values.
*
* @static
* @memberOf _
* @type Function
* @category Collections
* @param {Array|Object|string} collection The collection to iterate over.
* @param {Object} props The object of property values to filter by.
* @returns {Array} Returns a new array of elements that have the given properties.
* @example
*
* var characters = [
* { 'name': 'barney', 'age': 36, 'pets': ['hoppy'] },
* { 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }
* ];
*
* _.where(characters, { 'age': 36 });
* // => [{ 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }]
*
* _.where(characters, { 'pets': ['dino'] });
* // => [{ 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }]
*/
function where(collection, properties, first) {
return (first && isEmpty(properties))
? undefined
: (first ? find : filter)(collection, properties);
}
module.exports = where;