1 : A method executed by a processor for reordering subroutine parameters in subroutine parameters list, where: the method is based on a prefix, single operand operator form named ‘Grace˜’ in natural language; the ‘Grace˜’ operator moves the parameter, to which the operator is applied, one position towards a first position in the subroutine parameters list; and after reaching the first position in the subroutine parameters list, further application of the ‘Grace˜’ operator to the parameter is ignored and the parameter stays at the first position in the subroutine parameters list.