From: Markus Jais <mjais@...>
Date: 2002-06-03T23:58:11+09:00
Subject: Re: dynamic attr_accessor??

thanks for your tip.

does one of the two possible solutions have any significant
advantages over the other or is this just a matter of style??

is one more like "the ruby way" ??

markus


Yukihiro Matsumoto wrote:

> Hi,
> 
> In message "dynamic attr_accessor??"
>     on 02/06/03, Markus Jais <mjais@web.de> writes:
> 
> |I like to create methods for my class dynamically based on
> |strings I pass to initialize
> 
>  a) attr_accessor is a method of a class
>  b) attr_accessor takes names of accessors
>  c) attr_accessor just defines two methods
> 
> So the answer should be
> 
> easier one:
> 
> class Cl
>    def initialize(name)
>      @name = name
>      self.instance_eval "
>        def #{name}; @#{name}; end
>        def #{name}=(val); @#{name}=val; end
>      "
>    end
> end
> 
> trickier one:
> 
> class Cl
>    def initialize(name)
>      @name = name
>      class <<self
>        self
>      end.module_eval{attr_accessor name}
>    end
> end
> 
> matz.