react app

react-app/node_modules/react/lib/mapObject.js

@@ -0,0 +1,51 @@
+/**
+ * Copyright 2013-2015, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @providesModule mapObject
+ */
+
+'use strict';
+
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+/**
+ * Executes the provided `callback` once for each enumerable own property in the
+ * object and constructs a new object from the results. The `callback` is
+ * invoked with three arguments:
+ *
+ *  - the property value
+ *  - the property name
+ *  - the object being traversed
+ *
+ * Properties that are added after the call to `mapObject` will not be visited
+ * by `callback`. If the values of existing properties are changed, the value
+ * passed to `callback` will be the value at the time `mapObject` visits them.
+ * Properties that are deleted before being visited are not visited.
+ *
+ * @grep function objectMap()
+ * @grep function objMap()
+ *
+ * @param {?object} object
+ * @param {function} callback
+ * @param {*} context
+ * @return {?object}
+ */
+function mapObject(object, callback, context) {
+  if (!object) {
+    return null;
+  }
+  var result = {};
+  for (var name in object) {
+    if (hasOwnProperty.call(object, name)) {
+      result[name] = callback.call(context, object[name], name, object);
+    }
+  }
+  return result;
+}
+
+module.exports = mapObject;