Function invoke

MathBox/mathbox-bundle.js:38582–38593

* Invokes the method named by `methodName` on each element in the `collection` * returning an array of the results of each invoked method. Additional arguments * will be provided to each invoked method. If `methodName` is a function it * will be invoked for, and `this` bound to, each

(collection, methodName)

     * // => [['1', '2', '3'], ['4', '5', '6']]
     */
    function invoke(collection, methodName) {
      var args = slice(arguments, 2),
          index = -1,
          isFunc = typeof methodName == 'function',
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      forEach(collection, function(value) {
        result[++index] = (isFunc ? methodName : value[methodName]).apply(value, args);
      });
      return result;
    }

    /**
     * Creates an array of values by running each element in the collection