From: Gregory Millam <walker@...>
Date: 2003-12-15T12:07:00+09:00
Subject: Re: Q: How to convert hashed parameters to local variables?

Received: Mon, 15 Dec 2003 11:38:30 +0900
And lo David wrote:
>
> The variables you create that way will only be in scope in the
> eval block itself:
> 
>   eval "a = 1; puts a"   # 1
>   puts a                 # error: a is undefined
> 
> 
> David
> 

Not quite; eval creates variables at current scope, But you are right about one thing - the .each |key,val| scope will keep all the variables.

str = ""
args.each do |key,val|
  str << "#{key}='#{val}'\n"
end
eval str # Will place all the variables at the current scope.

I still recommend using the regexp search-and-replace instead of that, though. It also doesn't require the string itself to be in the templating function. Not to mention all the ickiness involved with eval, etc.