From: Florian Gross <flgr@...>
Date: 2004-10-21T04:39:17+09:00
Subject: Re: hash <<

Matt Maycock wrote:

> So, unless you count merge! and update, there doesn't seem to be a way
> to shove stuff into a hash and get the resulting updated hash back. 

I'm not sure, but maybe KeyedList could help here. It is a Hash that has 
list-style insert operations:

> Struct.new("Hero", :name, :reason)
> 
> # Create a KeyedList which will be keyed by the names
> # of its heroic elements.
> list = KeyedList.new { |hero| hero.name }
> # Adds elements to the KeyedList.
> list << Struct::Hero.new("Yukihiro Matsumoto", "Ruby")
> list << Struct::Hero.new("Larry Wall", "Enhanced regular expressions")
> list << Struct::Hero.new("Randal Schwartz", "Schwartzian transform")
>    
> list.size # => 3
> list["Yukihiro Matsumoto"].reason # => "Ruby"

It is both available as a Gem and from RPA.

Regards,
Florian Gross