From: "Damián M. González" <lists@...>
Date: 2012-09-27T21:30:35+09:00
Subject: Re: Subclassing Date

> Why are you subclassing Date in the first place?

 Well, the class Dia(It's day in spanish) represent a day. Each instance
of this class have like 10 inst. variables. I wanted to subclass Date
because I want to be available +() or -() or cweek() to a Dia instance,
in the way that it behave like a Date object does.

>You can use composition instead of subclassing, as in
>
>require 'date'
>
> class Dia
>  def initialize(ano, mes, dia, obj_mes)
>    @mes=obj_mes
>    @d = Date.new(ano,mes,dia)
>  end
>  def print()
>    printf "date = %04d-%02d-%02d : obj_mes = %-s\n ",
>      @d.year, @d.month, @d.day, @mes
>  end
> end
>
>a = Dia.new(2012, 6, 21,"foo")
>a.print()
>
>__END__
>
>Output:
>[2012/09/27] [11:17:47.31] [C:\_MyPrg\Ruby\Exper\Forum]
>ruby subdate.rb
>date = 2012-06-21 : obj_mes = foo
>
>HTH gfb

 Yes, I'll have to go for something like that, thanks.

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