react-router-ga/example/node_modules/for-in/index.js

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/*!
 * for-in <https://github.com/jonschlinkert/for-in>
 *
 * Copyright (c) 2014-2017, Jon Schlinkert.
 * Released under the MIT License.
 */

'use strict';

module.exports = function forIn(obj, fn, thisArg) {
  for (var key in obj) {
    if (fn.call(thisArg, obj[key], key, obj) === false) {
      break;
    }
  }
};