From: swille <sillewille@...>
Date: 2005-10-28T11:15:54+09:00
Subject: Re: "Reflecting" on my self.n00b

On 10/27/05, Gregory Brown <gregory.t.brown@gmail.com> wrote:
> For a little more clarification on usage:
>
> irb(main):027:0> class Foo
> irb(main):028:1> def initialize()
> irb(main):029:2> @url, @username, @password, @certificate, @owner = nil
> irb(main):030:2> end
> irb(main):031:1> attr_accessor :url, :username, :password,
> :certificate, :owner
> irb(main):032:1> end
> => nil
> irb(main):033:0> a = Foo.new
> => #<Foo:0xb7d3715c @certificate=nil, @password=nil, @username=nil,
> @owner=nil, @url=nil>
> irb(main):034:0> a.url = "http://newhavenrubyists.org"
> => "http://newhavenrubyists.org"
>
> and if you need to extend something
>
> irb(main):036:0> class Bar < Foo
> irb(main):037:1> end
> => nil
> irb(main):038:0> b = Bar.new
> => #<Bar:0xb7d82634 @certificate=nil, @password=nil, @username=nil,
> @owner=nil, @url=nil>
> irb(main):039:0> b.url = "http://stonecode.org/blog"
> => "http://stonecode.org/blog"
>
>
>

This seems to work great, thanks!  I swear, this is the first way that
I thought of, but somehow I missed all of the instance_variable calls.
 Mental note, look harder. :O)

Still though, I'm unsure of whether this is a smart thing to do.  Any
thoughts on that?  I'd definitely like to learn the right way to do
stuff.

class ServiceProfile
    def  initialize
        @sp_url = nil
        @sp_username = nil
        @sp_password = nil
        @sp_certificate = nil
        @sp_owner = nil
    end

    def load_certificate
        @sp_certificate.read
    end

    def call_service(&block)
    end
end

class MyService < ServiceProfile
    def  initialize
        @sp_extra = nil
        super
    end
end

svc_profile = MyService.new #ServiceProfile.new
sp_re = Regexp.new('^@sp_(\w+)')

svc_profile.instance_variables.sort.reverse.each { |var|
    if var.match(sp_re)
        print "Enter #{Regexp.last_match(1).capitalize}: "
        value = $stdin.gets.chomp
        svc_profile.instance_variable_set(var, value)
    end
}

svc_profile.instance_variables.sort.reverse.each { |var|
    if var.match(sp_re)
        puts svc_profile.instance_variable_get(var)
    end
}