function arrayMap(array, iteratee) {
	  var index = -1,
	      length = array.length,
	      result = Array(length);

	  while (++index < length) {
	    result[index] = iteratee(array[index], index, array);
	  }
	  return result;
	}
A specialized version of `_.map` for arrays without support for iteratee
shorthands.

@private
@param {Array} array The array to iterate over.
@param {Function} iteratee The function invoked per iteration.
@returns {Array} Returns the new mapped array.