Actually his example works.
Try it out: //tokenize 32 testing | join #$1
Will join #testing. This is an exception though, and doesn't work in other cases, since normally identifiers need to be atleast preceeded by a space in order to evaluated (when not part of another identifier itself that is, or some other exceptions like in popups where you can put a . before an identifier like $iif fex)
Greets
