From: Brian McCallister <brianm@...>
Date: 2006-08-13T02:53:27+09:00
Subject: Re: PATCH to make internal Hash class retain order...


On Aug 12, 2006, at 9:55 AM, Thies C. Arntzen wrote:

> Hi there -
>
> beeing new to ruby (thru rails) and coming from a strong php  
> background

<snip />

> * remember the order in which elements have been added to a Hash (at
> the cost of 2 extra pointers in every hash-bucket + 2 extra pointers
> per hash-table)
> * use this order for iterating (st_foreach will use this order)
> * implement a call Hash.order! allows the user to change the internal
> order;-)

Nice :-) The better place for discussion hacking on the ruby  
interpreter itself is probably ruby-core.

How difficult would it be to do an OrderedHash data structure as a C  
extension instead of in Ruby?

-Brian