From: ara.t.howard@...
Date: 2006-10-18T00:04:34+09:00
Subject: Re: dynamically assigning instance variables (redux)

On Tue, 17 Oct 2006, Phrogz wrote:

> matt neuburg wrote:
>> Wow, that was way cool. I think we can make it shorter (esp since he
>> only wants attr_readers) and faster (no point generating the singleton
>> class every time thru the loop):
>>
>> class Foo
>>   def initialize( hash={} )
>>     singleton_class = class << self; self; end
>>     hash.each do |key,value|
>>       instance_variable_set( "@" + key, value )
>>       singleton_class.class_eval { attr_reader key }
>>     end
>>   end
>> end
>
> /slaps forehead
> Of course, very nice :)


or, with attributes.rb:

     harp:~ > cat a.rb
     require 'rubygems'
     require 'attributes'

     class Foo
       def initialize(h={}) h.each{|k,v| attributes k => v} end
     end

     foo = Foo.new 'a' => 4, :k => 2
     p foo.a
     p foo.k


     harp:~ > ruby a.rb
     4
     2

;-)


-a
-- 
my religion is very simple.  my religion is kindness. -- the dalai lama