From: Nick Green <cruzmail.ngreen@...>
Date: 2009-09-03T13:04:53+09:00
Subject: Type checking function parameters

More or less all my functions look something like

def foo bar baz quux
   if not bar.is_a? String or
      not baz.is_a? FunkyDinosaur or
      not quux.respond_to? "getEatenByFunkyDinosaur"
      #complain about errors w/ raise or app specific complain function
   end
   # do some stuff
end


There has got to be a better way to go about this parameter checking
business, but googling is not working (bad search terms maybe).  Is
there?

And I don't really mean other ways of writing the same logic, i.e.

3 statements that look like:

complain "baz is no dinosaur!" unless baz.is_a? FunkyDinosaur

does not seem a whole lot better to me than the above example
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