View Problem
Check if a key exists in a map
Given a map pets 
ruby
ruby
erlang
erlang
erlang
fantom
fsharp
fsharp
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{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
dict:is_key(mary, Pets) andalso begin io:format("ok~n"), true end.
IsMember = ets:member(Pets, mary), if (IsMember) -> io:format("ok~n") ; true -> false end.
case gb_trees:lookup(mary, Pets) of none -> false ; _ -> io:format("ok~n") end.
map := ["joe":"cat", "mary":"turtle", "bill":"canary"]
if (map.containsKey("mary")) echo("ok")
if (map.containsKey("mary")) echo("ok")
if (Map.mem "mary" pets) then printfn "ok"
if pets.ContainsKey("mary") then printfn "ok"
Submit a new solution for ruby, erlang, csharp, fantom ...
There are 20 other solutions in additional languages (clojure, cpp, go, groovy ...)
