Function forEach

MathBox/mathbox-bundle.js:38424–38439

* Iterates over elements of a collection, executing the callback for each * element. The callback is bound to `thisArg` and invoked with three arguments; * (value, index|key, collection). Callbacks may exit iteration early by * explicitly returning `false`. * * Note: As with

(collection, callback, thisArg)

     * // => logs each number and returns the object (property order is not guaranteed across environments)
     */
    function forEach(collection, callback, thisArg) {
      var index = -1,
          length = collection ? collection.length : 0;

      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
      if (typeof length == 'number') {
        while (++index < length) {
          if (callback(collection[index], index, collection) === false) {
            break;
          }
        }
      } else {
        forOwn(collection, callback);
      }
      return collection;
    }

    /**
     * This method is like `_.forEach` except that it iterates over elements