From: ts <decoux@...>
Date: 2001-08-21T15:44:59+09:00
Subject: [ruby-talk:20043] Re: breaking out of nested loops

>>>>> "J" == John Tromp <tromp@daisy.uwaterloo.ca> writes:

J> print "nomatch\n" unless for i in 0...5 do
J>   break unless for j in 5...8 do
J>     if i==j
J>       print "match\n"
J>       break
J>     end
J>   end
J> end

 Well, you have a problem here : it will print nothing, and if you replace
 "..." with ".." it will print "match\nnomatch\n"

 You can, perhaps, use #catch

   puts (catch(:end) do
      for i in 0 .. 5
         for j in 5 .. 8
            throw :end, "match" if i == j
         end
      end
      "nomatch"
   end)


Guy Decoux