From: Fredrik <fredjoha@...>
Date: 2008-09-13T18:13:06+09:00
Subject: Is my method defined?

I have a method by the name methodA. I want to access this method like
this

a = 'methodA'
eval(a)

But how do I know if the variable a actually holds the name of a
defined method? An exception is raised if I try to run eval(a) with an
incorrect method name, but I need to know this before I call eval(a).
How do I do that?

I found this solution:

def method?(arg)
  begin
    method(a)
  rescue
    nil
  end
end

which does work, but why is this function "method?" not already in the
Ruby language then?