Self question

[danny@cs.ttu.edu (Danny Travis)]

Can someone tell me why this works:
>_AddSlots: (| str = ('This is a string.') |)
>str do: [ | :i | i print ]

for printing a string but this:

>str reverseDo: [ | :i | i print ]

for printing a string in reverse order?

Thanks,
Danny
danny@cs4sun.cs.ttu.edu