From: Gavin Sinclair <gsinclair@...>
Date: 2003-01-17T11:31:37+09:00
Subject: Re: quick: it responds, it evaluates, and is not empty

On Friday, January 17, 2003, 12:35:32 PM, dblack wrote:

> I continue to dislike the repetition of the

>   if obj.respond_to?(:meth) then obj.meth ...

> thing, although I don't know how to circumvent it efficiently and
> effectively.

   begin
     obj.meth
   rescue NameError
     "Well, I guess we're stuffed, then."
   end

I remember you doing this in dbdbd, and I thought it was quite
elegant.  I used it once to handle a nil argument in place of
something that responds to :to_h

  hash =
    begin
      arg.to_h
    rescue NameError
      {}
    end


I wanted to do

  hash = arg.to_h rescue {}

but that doesn't work.
   
Gavin