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