Expanding on what Jim said, you don't usually need to convert the keys of a map into a set, because the map pretty much acts like a set of its keys if you use contains?
For example, (contains? {:a 1, :b 2} :a) tests whether :a is among the set of keys in the map. I believe that clojure.set's union, intersection, and difference all work out of the box on maps (acting as if they are sets of keys), but you should do some testing and/or inspection of the source code to verify this, especially on maps with nil or false values. On Mon, Jul 1, 2013 at 12:37 PM, Jim - FooBar(); <jimpil1...@gmail.com>wrote: > On 01/07/13 20:02, Pablo Nussembaum wrote: > >> This is pretty strange behavior to me, why is the case that keys >> function don't return a set like java? >> > > It doesn't need to be, does it?...the map itself ensures that there are no > duplicate keys anyway. I guess it's one of those 'less is more' cases... > > Jim > > > -- > -- > 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+unsubscribe@**googlegroups.com<clojure%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://groups.google.com/**group/clojure?hl=en<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+unsubscribe@**googlegroups.com<clojure%2bunsubscr...@googlegroups.com> > . > For more options, visit > https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out> > . > > > -- -- 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.