On Sunday, 5 January 2014 23:33:41 UTC, Brandon Bloom wrote: > > Michał: This is awesome. Thanks for the continued awesome work on data > structures! > > >> ;; if the key is not present in the collection, -1 is returned: >> (avl/rank-of (avl/sorted-set 3 4 5) 0) >> ;= -1 >> > > Curious: Why not return nil instead of -1? >
Without commenting on the specifics of data.avl: The usual reason to do this in index lookup code is that -1 is a valid primitive return value. If you wanted to use nil instead, it would mean boxing all other return values, which could be quite a big performance issue in various algorithms. -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
