I have tried the using backticks / system / %x but get the following 
error:

./urls2.rb:41:in ``': No such file or directory - t1.showURL 
(Errno::ENOENT)
        from ./urls2.rb:41:in `block in <main>'
        from ./urls2.rb:40:in `each'
        from ./urls2.rb:40:in `<main>'

Any further help is much appreciated!

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