In Ruby, can you perform string interpolation on data read from a file?

Question

In Ruby you can reference variables inside strings and they are interpolated at runtime.

For example if you declare a variable foo equals \"Ted\

Answer 1

Might as well throw my own solution into the mix.

irb(main):001:0> str = '#{13*3} Music'
=> "\#{13*3} Music"
irb(main):002:0> str.gsub(/\#\{(.*?)\}/) { |match| eval($1) }
=> "39 Music"

The weakness is that the expression you want to evaluate may have further { } in it, so the regex should probably be improved.