From: Brian Candler <b.candler@...>
Date: 2010-12-09T00:34:21+09:00
Subject: Re: How to delay "string" interpretation?

Fritz Trapper wrote in post #966837:
> Suppose the following code:
>
>    t='#{a} + #{b}'
>    ...
>    a='a';b='b'
>
> How to cause ruby to interpret t as a "string" to get the result string
> "a + b"?

Here's one option:

require 'erb'
t = '<%= a %> + <%= b %>'
template = ERB.new(t)
a = 'foo'
b = 'bar'
puts template.result(binding)

erb is in the standard library. Erubis is an alternative implementation, 
faster and more powerful, and really well documented.

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