From: MonkeeSage <MonkeeSage@...>
Date: 2008-01-03T13:04:59+09:00
Subject: Re: change the symbol in an interpolated string value?

On Jan 2, 9:23 pm, scoot...@hotmail.com wrote:
> PROBLEM:
> I would like to be able to change the symbol in an interpolated string
> value.
> For example:
>
> # before
> whoever   = "World";
> message =  "Hello #{whoever}";
> puts message;
>
> # after
> whoever   = "World";
> ## message =  "Hello @{whoever}";    ## one arbitrary example
> ## message =  "Hello ${whoever}";     ## another example
> ## message =  "Hello ???{whoever}"; ## yet another
> ## message =  "Hello ___whoever___";   ## or even yet another, no
> braces this time
> puts message;
>
> I would like to be able to make it so any of the commented-out
> versions could work, just as the "before" version works.
>
> What's the ruby-way of doing this?

You can do it with regular expressions or a parser, but you
shouldn't...it will be *much* slower (and I mean like a gabazillion
times slower), and almost certainly less robust (e.g., handling nested
symbols), than the built-in interpolation syntax. Why do you need a
different syntax?

Regards,
Jordan