View Problem
Check if a key exists in a map
Given a map pets 
ruby
ruby
clojure
Submit a new solution for ruby or clojure
There are 25 other solutions in additional languages (cpp, erlang, fantom, fsharp ...)
{joe:cat,mary:turtle,bill:canary} print "ok" if an pet exists for "mary"
puts "ok" if map.has_key?('mary')
puts "ok" if map['mary'] # Only works if map entry can't be nil or false
(if (contains? '{joe cat mary turtle bill canary} 'mary)
(println "ok"))
(println "ok"))
Submit a new solution for ruby or clojure
There are 25 other solutions in additional languages (cpp, erlang, fantom, fsharp ...)
