Mark Wieder wrote:
But I must admit that the circumstances in which such a mechanism was
useful have been very rare for me. How often do you need to call a
handler without knowing whether it's present?
I actually end up doing this quite often: one behavior if a secondary stack
is present, another behavior if it isn't. That allows me to add substacks as
optional components and not throw errors if they aren't in a given
distribution.
I may be a bit slow today as I'm caffeine free this afternoon, but
wouldn't checking for the presence of the stack do the same as checking
for its handlers?
--
Richard Gaskin
Managing Editor, revJournal
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