From: Brian Mitchell <binary42@...>
Date: 2004-11-01T16:54:35+09:00
Subject: Re: Correction and another Tip. Re: Nuby Tip for the Day : Memoization

On Mon, 1 Nov 2004 14:01:34 +0900, John Carter <john.carter@tait.co.nz> wrote:
> On Mon, 1 Nov 2004, Joel VanderWerf wrote:
> 
> > Just a little correction to a worthy post...
> 
> thanks
> 
> > John Carter wrote:
> > ...
> >>   class BigExpensiveMadeOften
> >>     def initialize( unique_name)
> >>       # Big expensive computation
> >>     end
> >>
> 
> make that
>      @@memo = Hash.new {|hash,key| hash[key] = BigExpensiveMadeOften.new( key)}
> 
> Reminder for the day for not so Nubies...
> 
> Every reference to a string is a String.new, so sometimes factoring out string constants out of inner loops can be a big win...
> 

Possibly you meant a string literal. A reference is what the variable
ends up holding.

Brian Mitchell