From: Tim Bates <tim@...>
Date: 2003-03-18T16:27:31+09:00
Subject: Substitution in a string in a string

I am using eval to dynamically define a method, and at some point, I want to 
do this:
  raise "Invalid type: #{val}"
Except that this is inside an eval'd string, and so #{val} gets evaluated the 
first time, and at this point val doesn't exist. I've tried all sorts of 
things like
  raise "Invalid type: #{"#{val}"}"
but none of them quite do what I want. I eventually settled for
  raise "Invalid type: " + val.to_s
but it still raises the question, how do you force a #{...} not to be 
evaluated?

Tim Bates
-- 
tim@bates.id.au