charlike/templates/node_modules/es5-ext/object/map-keys.js

Small, fast, simple and streaming project scaffolder for myself, but not only. Supports hundreds of template engines through the @JSTransformers API or if you want custom `render` function passed through options

'use strict';

var callable = require('./valid-callable')
  , forEach  = require('./for-each')

  , call = Function.prototype.call;

module.exports = function (obj, cb/*, thisArg*/) {
	var o = {}, thisArg = arguments[2];
	callable(cb);
	forEach(obj, function (value, key, obj, index) {
		o[call.call(cb, thisArg, key, value, this, index)] = value;
	}, obj);
	return o;
};