From: Peter Lynch <argnosis@...>
Date: 2007-01-03T00:31:00+09:00
Subject: Detecting default used in method calls

I would like to know if a function has been called with or without an
optional argument.

If I have -

 def the_Function (a, b = '')
 end

and I invoke it like this -

 the_Function('a')
 the_Function('a', '')

is there any way for me to tell within the_Function which form of
invocation was used?

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