From: Jean-Hugues ROBERT <jean_hugues_robert@...>
Date: 2002-05-28T03:10:01+09:00
Subject: Re: Un-/Re-quoting strings

At 02:37 28/05/2002 +0900, you wrote:
>Hi,
>
>Is there a way to take a single-quoted string and direct the vm to
>interpret it as a double-quoted string later?
>
>I want to have a debug_print that does not incur the expense of
>interpolation unless $DEBUG (or some other flag) is set.
>
>It would look something like:
>
>if $DEBUG
>   def debug_print(str)
>     print str_nt str.requote
>   end
>   else
>   def debug_print(str)
>   end
>end
>
>I guess I can do it with eval("\"" + str + "\""), but that seems
>hackish to me. :-)
>
>Thanks!
>
>-a.

You may have the interpolation occurring in a block that is evaluated
only in debug mode:

def debug_print( &a_block )
   if $DEBUG
     print a_block.call()
   end
end
Then use:
   debug_print{"Hello"}
instead of
   debug_print("Hello")
.

Yours,

Jean-Hugues


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