code: public function execute(array $arguments) {
  		if (empty($arguments)) throw new \InvalidArgumentException("Count: No parameters found.");
  		list($list) = $arguments;
  		return is_string($list) ? strlen($list) : count($list);
  	}
docs: Counts the elements on an array
  Usage: (Array::count (array 1 2 3 4 5))
  Returns: int
  (non-PHPdoc)
  @see \eMacros\Runtime\GenericFunction::execute()