On Tue, 10 Aug 1999 07:54:47 -0700 Stephen Pope <stp at create.ucsb.edu> wrote: 
>This is how it was done in the old PARC research image; do:andBetweenDo:
>is useful for many things.
>
>Another option is the ugly (but simple)
>
>        aCollection do:
>                [:each |
>                 each printOn: aStream.
>                 aStream nextPut: $,].
>	aStream skip: -1

Except for the situation where the collection is empty. I posted a fix for just such code yesterday.

Cheers,
Bob