Hey, I guess because a sequence is not a datastructure. If there is nothing to iterate over via 'first or 'next, then it's nil.
And an "empty sequence" is precisely that: nil. In my point of view, a sequence is more like a "functional iterator": calling first on it will always return the same value, calling next on it will return either nil if we are at the end, either a new seq ... Hope I'm clear and also correct, -- Laurent 2010/1/15 Sean Devlin <francoisdev...@gmail.com>: > Hey everyone, > I was working with seq today, and I was wondering why I got a certain > result. > > user=> (seq []) > nil > > Why is nil returned, instead of an empty sequence? > > Sean > > -- > 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 >
-- 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
