type of optional parameters

[steenpass]

> proc readoptionalparameters(list #) { return(#); };
> readoptionalparameters(list("this is a string inside a list"));
[1]:
   this is a string inside a list
> readoptionalparameters("this is a string without list");
[1]:
   this is a string without list

From within the procedure, you can't tell whether it was called with a list or a string as argument.

Think of a procedure "myproc" with two optional arguments, a list (which may contain strings) and a string. There are default values for arguments which are not given explicitly. If 'myproc(list("somestring"));', what to do?

[Oleksandr]

too difficult