On Dec 19, 8:27 pm, Sean Devlin <francoisdev...@gmail.com> wrote: > :else was chose because it is simply not nil, and therefor always true.
I suspected something along these lines soon after I posted. I did some more experimenting and discovered that :foo will work just as well as :else. So if I understand correctly, :else is not even defined in the language anywhere. Like :foo, it springs into existence when I first mention it, and it evaluates to true by virtue of being a keyword. Cond exploits this behavior for free. This is in contrast with, e.g., the ns macro, which presumably would have to explicitly match against keywords such as :use or :require to implement the proper semantics. Mike -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
