Most 4clojure exercises are meant for you to familiarize yourself with the clojure standard library. Usually you'll spend more time looking for the appropriate function on clojuredocs than actually coding the solution.
Here's the section on collections: http://clojuredocs.org/quickref/Clojure%20Core#Collections+-+Sequences Roman. 2012/2/29 Kevin Ilchmann Jørgensen <kijm...@gmail.com> > So, you need to give it a function which takes an key and a collection. > > (fn [k coll] ...) > > It should return true if two things are true. That the collection > _contains_ the key, and the key is _nil_ > > Enjoy! > > /Kevin > > > On Wed, Feb 29, 2012 at 7:15 AM, weiyongq <weiyo...@gmail.com> wrote: > > "A nil key " > > http://www.4clojure.com/problem/134 > > l look it no Elementary.please give me some help. > > > > -- > > 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 > -- 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
