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44 lines
1.5 KiB
JavaScript
44 lines
1.5 KiB
JavaScript
6 years ago
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var createAggregator = require('./_createAggregator');
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/**
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* Creates an array of elements split into two groups, the first of which
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* contains elements `predicate` returns truthy for, the second of which
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* contains elements `predicate` returns falsey for. The predicate is
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* invoked with one argument: (value).
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*
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* @static
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* @memberOf _
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* @since 3.0.0
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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 array of grouped elements.
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* @example
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*
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* var users = [
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* { 'user': 'barney', 'age': 36, 'active': false },
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* { 'user': 'fred', 'age': 40, 'active': true },
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* { 'user': 'pebbles', 'age': 1, 'active': false }
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* ];
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*
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* _.partition(users, function(o) { return o.active; });
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* // => objects for [['fred'], ['barney', 'pebbles']]
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*
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* // The `_.matches` iteratee shorthand.
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* _.partition(users, { 'age': 1, 'active': false });
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* // => objects for [['pebbles'], ['barney', 'fred']]
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*
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* // The `_.matchesProperty` iteratee shorthand.
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* _.partition(users, ['active', false]);
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* // => objects for [['barney', 'pebbles'], ['fred']]
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*
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* // The `_.property` iteratee shorthand.
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* _.partition(users, 'active');
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* // => objects for [['fred'], ['barney', 'pebbles']]
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*/
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var partition = createAggregator(function(result, value, key) {
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result[key ? 0 : 1].push(value);
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}, function() { return [[], []]; });
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module.exports = partition;
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