From: Owein Herrmann <oherrmann@...>
Date: 2009-04-19T02:16:58+09:00
Subject: Reffering back to caller's binding

Hello Rubyists,

I am trying to define a helper method which displays a ruby expression
and then displays the results of that expression via puts. Initially I
did this, which obviously did not work:

def peval( expression )
  puts expression
  puts eval( expression )
  puts ""
end

of course when I ran it, the scope of the method does not include
objects in the calling scope... so then I realized it had to do with
bindings and I defined this:

def peval
  f,b = yield
  puts f
  puts eval(f,b)
  puts ""
end

and this works, but, its really ugly:

peval { ["map.inspect", binding()] }

so my question is, is there a way to obtain the caller's binding so that
I do not have to specify it in the call? Is this in Pickaxe and I spaced
out on that section? I eally just want to be able to specify the
expression (in quotes), get it to display, see the results, move on...
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