function filter(collection, predicate, thisArg) {
	      var func = isArray(collection) ? arrayFilter : baseFilter;
	      predicate = getCallback(predicate, thisArg, 3);
	      return func(collection, predicate);
	    }
Iterates over elements of `collection`, returning an array of all elements
`predicate` returns truthy for. The predicate is bound to `thisArg` and
invoked with three arguments: (value, index|key, collection).

If a property name is provided for `predicate` the created `_.property`
style callback returns the property value of the given element.

If a value is also provided for `thisArg` the created `_.matchesProperty`
style callback returns `true` for elements that have a matching property
value, else `false`.

If an object is provided for `predicate` the created `_.matches` style
callback returns `true` for elements that have the properties of the given
object, else `false`.

@static
@memberOf _
@alias select
@category Collection
@param {Array|Object|string} collection The collection to iterate over.
@param {Function|Object|string} [predicate=_.identity] The function invoked
 per iteration.
@param {*} [thisArg] The `this` binding of `predicate`.
@returns {Array} Returns the new filtered array.
@example

_.filter([4, 5, 6], function(n) {
  return n % 2 == 0;
});
// => [4, 6]

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

// using the `_.matches` callback shorthand
_.pluck(_.filter(users, { 'age': 36, 'active': true }), 'user');
// => ['barney']

// using the `_.matchesProperty` callback shorthand
_.pluck(_.filter(users, 'active', false), 'user');
// => ['fred']

// using the `_.property` callback shorthand
_.pluck(_.filter(users, 'active'), 'user');
// => ['barney']