51 lines
2.0 KiB
JavaScript
51 lines
2.0 KiB
JavaScript
/**
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* Lo-Dash 2.3.0 (Custom Build) <http://lodash.com/>
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* Build: `lodash modularize modern exports="npm" -o ./npm/`
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* Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <http://lodash.com/license>
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*/
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var baseCreateCallback = require('./../lodash._basecreatecallback'),
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keys = require('./../lodash.keys'),
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objectTypes = require('./../lodash._objecttypes');
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/**
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* Iterates over own enumerable properties of an object, executing the callback
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* for each property. The callback is bound to `thisArg` and invoked with three
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* arguments; (value, key, object). Callbacks may exit iteration early by
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* explicitly returning `false`.
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*
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* @static
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* @memberOf _
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* @type Function
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* @category Objects
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* @param {Object} object The object to iterate over.
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* @param {Function} [callback=identity] The function called per iteration.
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* @param {*} [thisArg] The `this` binding of `callback`.
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* @returns {Object} Returns `object`.
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* @example
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*
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* _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
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* console.log(key);
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* });
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* // => logs '0', '1', and 'length' (property order is not guaranteed across environments)
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*/
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var forOwn = function(collection, callback, thisArg) {
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var index, iterable = collection, result = iterable;
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if (!iterable) return result;
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if (!objectTypes[typeof iterable]) return result;
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callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
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var ownIndex = -1,
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ownProps = objectTypes[typeof iterable] && keys(iterable),
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length = ownProps ? ownProps.length : 0;
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while (++ownIndex < length) {
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index = ownProps[ownIndex];
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if (callback(iterable[index], index, collection) === false) return result;
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}
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return result
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};
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module.exports = forOwn;
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