thanks On 2月29日, 下午10时00分, Roman Perepelitsa <roman.perepeli...@gmail.com> wrote: > 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
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