53 lines
1.6 KiB
JavaScript
53 lines
1.6 KiB
JavaScript
var arrayFilter = require('./_arrayFilter'),
|
|
baseFilter = require('./_baseFilter'),
|
|
baseIteratee = require('./_baseIteratee'),
|
|
isArray = require('./isArray');
|
|
|
|
/**
|
|
* Iterates over elements of `collection`, returning an array of all elements
|
|
* `predicate` returns truthy for. The predicate is invoked with three
|
|
* arguments: (value, index|key, collection).
|
|
*
|
|
* **Note:** Unlike `_.remove`, this method returns a new array.
|
|
*
|
|
* @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.
|
|
* @returns {Array} Returns the new filtered array.
|
|
* @see _.reject
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36, 'active': true },
|
|
* { 'user': 'fred', 'age': 40, 'active': false }
|
|
* ];
|
|
*
|
|
* _.filter(users, function(o) { return !o.active; });
|
|
* // => objects for ['fred']
|
|
*
|
|
* // The `_.matches` iteratee shorthand.
|
|
* _.filter(users, { 'age': 36, 'active': true });
|
|
* // => objects for ['barney']
|
|
*
|
|
* // The `_.matchesProperty` iteratee shorthand.
|
|
* _.filter(users, ['active', false]);
|
|
* // => objects for ['fred']
|
|
*
|
|
* // The `_.property` iteratee shorthand.
|
|
* _.filter(users, 'active');
|
|
* // => objects for ['barney']
|
|
*
|
|
* // Combining several predicates using `_.overEvery` or `_.overSome`.
|
|
* _.filter(users, _.overSome([{ 'age': 36 }, ['age', 40]]));
|
|
* // => objects for ['fred', 'barney']
|
|
*/
|
|
function filter(collection, predicate) {
|
|
var func = isArray(collection) ? arrayFilter : baseFilter;
|
|
return func(collection, baseIteratee(predicate, 3));
|
|
}
|
|
|
|
module.exports = filter;
|