From: dara <dara.lillis@...>
Date: 2009-12-04T06:08:03+09:00
Subject: Variable references in yaml files

I have been trying to include variable references in a yaml file. I
have a feeling it's not possible to do this, but I thought I'd ask
here before giving up.

Here is my ruby script:
require 'yaml'
hash = YAML.load_file('sampl.yml')

fourth_member = 'Joan'

hash.each_pair do |key, value|
  puts "Value for key \"#{key}\" is: \"#{value}\""
end

puts "\nFrom within script, \"fourth\" is: #{fourth_member}"

The contents of sampl.yml are:
:first: 'John'
:second: 'Jane'
:third: 'Jack'
:fourth: "#{fourth_member}"

The output of the script is:

Value for key "first" is: "John"
Value for key "second" is: "Jane"
Value for key "third" is: "Jack"
Value for key "fourth" is: "#{fourth_member}"

From within script, "fourth" is: Joan

I want the fourth line of the output to read:
"Value for key "fourth" is: "Joan""

I have done much googling and tried every possible permutation of
escape characters I could think of, with no success. Can anyone
either:
1) Show me a way to do this (much preferred ;) ).
2) Confirm this can't be done (would at least save me wasting further
time on it).

Thanks,

-Dara