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https://github.com/facebook/react.git
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Paul O’Shannessy
48 lines
1.3 KiB
JavaScript
48 lines
1.3 KiB
JavaScript
/**
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* Copyright 2013 Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @providesModule objMapKeyVal
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*/
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"use strict";
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/**
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* Behaves the same as `objMap` but invokes func with the key first, and value
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* second. Use `objMap` unless you need this special case.
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* Invokes func as:
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*
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* func(key, value, iteration)
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*
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* @param {?object} obj Object to map keys over
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* @param {!function} func Invoked for each key/val pair.
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* @param {?*} context
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* @return {?object} Result of mapping or null if obj is falsey
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*/
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function objMapKeyVal(obj, func, context) {
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if (!obj) {
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return null;
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}
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var i = 0;
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var ret = {};
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for (var key in obj) {
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if (obj.hasOwnProperty(key)) {
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ret[key] = func.call(context, key, obj[key], i++);
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}
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}
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return ret;
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}
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module.exports = objMapKeyVal;
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