function where(collection, source) {
	      return filter(collection, baseMatches(source));
	    }
Performs a deep comparison between each element in `collection` and the
source object, returning an array of all elements that have equivalent
property values.

**Note:** This method supports comparing arrays, booleans, `Date` objects,
numbers, `Object` objects, regexes, and strings. Objects are compared by
their own, not inherited, enumerable properties. For comparing a single
own or inherited property value see `_.matchesProperty`.

@static
@memberOf _
@category Collection
@param {Array|Object|string} collection The collection to search.
@param {Object} source The object of property values to match.
@returns {Array} Returns the new filtered array.
@example

var users = [
  { 'user': 'barney', 'age': 36, 'active': false, 'pets': ['hoppy'] },
  { 'user': 'fred',   'age': 40, 'active': true, 'pets': ['baby puss', 'dino'] }
];

_.pluck(_.where(users, { 'age': 36, 'active': false }), 'user');
// => ['barney']

_.pluck(_.where(users, { 'pets': ['dino'] }), 'user');
// => ['fred']