From: Axel Etzold <AEtzold@...>
Date: 2007-09-29T23:58:06+09:00
Subject: Re: Is there a combination of a struct and an array? I wanna iterate over all created objects from a certain struct-class (I guess).


-------- Original-Nachricht --------
> Datum: Sat, 29 Sep 2007 22:40:07 +0900
> Von: kazaam <kazaam@oleco.net>
> An: ruby-talk@ruby-lang.org
> Betreff: Is there a combination of a struct and an array? I wanna iterate over all created objects from a certain struct-class (I guess).

> I have a file with many entries and much of these I don't need. Let's
> imagine:
> 
> name=arthur
> age=16
> hobby=swimming
> job=dancer
> home=DE
> name=marry
> age=49
> hobby=singing
> job=nurse
> home=US
> name=tom
> age=32
> hobby=crafting
> job=electician
> home=NW
> name=mantra
> age=22
> hobby=reading
> job=cop
> home=FR
> 
> this is my file and I need just the name,hobby and home of each one.
> 
> Now I read my file:
> 
> File.open(myfile).each { |line|
>     puts line.sub(/name=|hobby=|home=/,'') if line =~/name|hobby|home/
> }
> 
> Which puts me the entries nicly on my screen. But I have to process them
> from my script. So I need some kind of an array struct which let's me
> iterate over each person and let's me use their name,hobby and home values. But
> how to achieve this? With with variable-typ and how to get the correctly
> collected?
> 
> I wanna talk to them like this:
> 
> person.each |entry| do
>     puts entry.name
>     puts entry.hobby
>     puts entry.home
> end
> 
> but how to achieve this? any idea or suggestion?
> 
> bye
> -- 
> kazaam <kazaam@oleco.net>

Dear Kazaam,

you could create a class Person to do the job, something like

class Person
    def initialize(name,hobby,age,job,home)
         @name=name
         @hobby=hobby
         @age=age
         @job=job
         @home=home
     end
     def name
         @name
     end
     def hobby
         @hobby
     end
     def age
         @age
     end
     def home
         @home
     end
     def job
         @job
     end
end

me=Person.new("Albert Einstein","physics",134,"retired","wonttellyou")
p me.hobby

There is a nice introduction to classes in Ruby in http://pine.fm/LearnToProgram, particularly in chapter 9.

Best regards,

Axel 
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