From: Daniel Schierbeck <daniel.schierbeck@...>
Date: 2006-06-11T20:46:32+09:00
Subject: Hash#[]

Am I the only one who thinks this would be a natural behavior for Hash#[]?

   hsh = {:foo => 'FOO', :bar => 'BAR', :baz => 'BAZ'}
   hsh[:foo]         #=> "FOO"
   hsh[:foo, :baz]   #=> ["FOO", "BAZ"]

That would enable us to do the following

   def initialize(opts = {})
     @host, @user, @pass = opts[:host, :user, :pass]
   end

Since the old functionality isn't changed, it would be backwards compatible.

Implementation:

   class Hash
     def [](*keys)
       if keys.length == 1
         fetch(keys.first, nil)
       else
         keys.map{|key| fetch(key, nil)}
       end
     end
   end


Cheers,
Daniel