From: Eero Saynatkari <ruby-ml@...>
Date: 2006-01-18T16:51:30+09:00
Subject: Re: Delayed quote expansion

On 2006.01.18 14:29, Kevin Olbrich wrote:
> I'm sure the answer to this will seem simple once I see it.  Right now 
> it eludes me.
> 
> How can one have a string object like this...
> 
> a = '#{some_value}'
> 
> and have it get evaluated as a double quoted string (with the value for 
> some_value being automatically replaced) at a later time?
> 
> I would prefer that it is evaluated in context from which it is called.
> 
> I would like to do something like this...
> 
> def func(param)
>   test = 42
>   puts param.quote_substitution
> end
> 
> func('my number is #{test}')    #=> "my number is 42"

You can delay evaluation like this:

  string = '"#{foo}"'

  # ...
  
  value  = eval string   # Add a binding if you want

> _Kevin


E