On 2017-05-03, at 14:25, Alan Altmark wrote: >> But, I can't provide an "OMITTED" final argument, no matter how >> many commas or blank lines I supply. > > If you mean that REXX doesn't distinguish between a null string and an > omitted string, that's true. My programs all use the null string in an > argument to indicate omission, since that what you get with the ", ," > idiom. So my program can decide it wants the "default" behavior at > runtime without having to have two different CALLs or function > invocations. > No, except for the final argument the ARG( n, 'EXISTS' ) and arg( n, 'OMITTED' ) functions do distinguish between a null string and an omitted string. Look at the output of the example I supplied.
> I like it that way. :-) > > Alan Altmark -- gil
