From: Joel VanderWerf <vjoel@...>
Date: 2004-08-04T09:15:26+09:00
Subject: Re: Fastest way to reverse-process a string?

Lloyd Zusman wrote:
> In a ruby program I'm writing, I want to parse a string in reverse and
> feed each of its individual characters through a state machine.
> 
> A "hammer and tongs" solution looks like this:
> 
>   string.reverse.split(//).each {
>     |ch|
>     feedIntoStateMachine(ch)
>   }
> 
> However, this seems rather inefficient.  Does anyone know of a faster
> algorithm for this in ruby?

String#each_byte would avoid the creation of the array.