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var createAggregator = require('./_createAggregator'); | |
/** | |
* Creates an array of elements split into two groups, the first of which | |
* contains elements `predicate` returns truthy for, the second of which | |
* contains elements `predicate` returns falsey for. The predicate is | |
* invoked with one argument: (value). | |
* | |
* @static | |
* @memberOf _ | |
* @since 3.0.0 | |
* @category Collection | |
* @param {Array|Object} collection The collection to iterate over. | |
* @param {Function} [predicate=_.identity] The function invoked per iteration. | |
* @returns {Array} Returns the array of grouped elements. | |
* @example | |
* | |
* var users = [ | |
* { 'user': 'barney', 'age': 36, 'active': false }, | |
* { 'user': 'fred', 'age': 40, 'active': true }, | |
* { 'user': 'pebbles', 'age': 1, 'active': false } | |
* ]; | |
* | |
* _.partition(users, function(o) { return o.active; }); | |
* // => objects for [['fred'], ['barney', 'pebbles']] | |
* | |
* // The `_.matches` iteratee shorthand. | |
* _.partition(users, { 'age': 1, 'active': false }); | |
* // => objects for [['pebbles'], ['barney', 'fred']] | |
* | |
* // The `_.matchesProperty` iteratee shorthand. | |
* _.partition(users, ['active', false]); | |
* // => objects for [['barney', 'pebbles'], ['fred']] | |
* | |
* // The `_.property` iteratee shorthand. | |
* _.partition(users, 'active'); | |
* // => objects for [['fred'], ['barney', 'pebbles']] | |
*/ | |
var partition = createAggregator(function(result, value, key) { | |
result[key ? 0 : 1].push(value); | |
}, function() { return [[], []]; }); | |
module.exports = partition; | |