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frontend/node_modules/underscore/modules/mapObject.js

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+import cb from './_cb.js';
+import keys from './keys.js';
+
+// Returns the results of applying the `iteratee` to each element of `obj`.
+// In contrast to `_.map` it returns an object.
+export default function mapObject(obj, iteratee, context) {
+  iteratee = cb(iteratee, context);
+  var _keys = keys(obj),
+      length = _keys.length,
+      results = {};
+  for (var index = 0; index < length; index++) {
+    var currentKey = _keys[index];
+    results[currentKey] = iteratee(obj[currentKey], currentKey, obj);
+  }
+  return results;
+}