From: James Britt <james_b@...>
Date: 2005-11-23T08:14:25+09:00
Subject: Re: what is the ruby way to do this?

Bill Kelly wrote:

> An alternate approach might be:
> 
> @attributes = Hash.new {|h,k| h[k] = Array.new}
> 
> This will automatically create arrays to hold your keys, on demand.
> 
> Now you can just say:
> 
> @attributes["whatever"] << "something"
> @attributes["foo"] << 123
> @attributes["foo"] << 456
> 
> @attributes.inspect
> {"foo"=>[123, 456], "whatever"=>["something"]}



And, mixing some of the approaches shown:


@attributes = {}


# Assumes the given object quacks on 'key'
def @attributes.<<( keyed_obj )
   (self[keyed_obj.key]||=[])<<keyed_obj
end


@attributes << a1
@attributes << a2
@attributes << a3



James

-- 

http://www.ruby-doc.org       - Ruby Help & Documentation
http://www.artima.com/rubycs/ - Ruby Code & Style: Writers wanted
http://www.rubystuff.com      - The Ruby Store for Ruby Stuff
http://www.jamesbritt.com     - Playing with Better Toys
http://www.30secondrule.com   - Building Better Tools