From: fastjack@... (Martin Maciaszek)
Date: 2002-02-06T17:41:42+09:00
Subject: expanding variables in strings

I have a long list of variables that gets used at several places in
my program. I figured that it might be a good idea to put the names
of those variables in an array. So I ended up with the following:

%w{ foo bar baz}.collect { |x| "'\#{" + x + "}'"}.join(", ")
--> "'#{foo}', '#{bar}', '#{baz}'"

This returns a nice string that I would be otherwise cut&pasting all
over my program. But now I need to expand those variables. I've looked
up the String class but couldn't find anything useful (except trying
to rewrite those expensions from scratch)

Cheers
Martin