From: sto.mar@...
Date: 2012-11-11T18:24:27+09:00
Subject: Re: Instance name of a class/object?

Am 11.11.2012 05:21, schrieb Carolyn Grant:
> Hi! I'm quite new to Ruby, and am quite confused about instance names.
>
> I am in the middle of writing an app that has a good number of
> configuration files, and I'd like to write:
>
> basic_config = MySettings.new # Picks up & processes basic_config.yml
> adv_config = MySettings.new   # Picks up & processes adv_config.yml
>
> I'm using SettingsLogic to the hard work, so MySettings looks a bit like
> this:
>
> class MySettings < SettingsLogic
>    source instance.name # For example
>
>    # Do some other stuff
> end
>
> I tried my_class.name; that returns a "Method not defined" error" (I'm
> using 1.9.3p194)
>
> What I'd really like to avoid is:
>
> basic_config = MySettings.new(basic_config).
>
> As far as I can tell, what I want to do isn't possible. I did ask on
> StackOverflow and Boris was a great help, but his code requires a :name
> => some_name flag. So I figured I'd ask here and see if anyone can help
> me! Can I do what I want to do?

This could not work for several reasons:

- the object is created first, before it can be assigned to a variable
- a single object could be referenced by several variables
- and of course: you can create and use objects without ever
   assigning them to a variable: `puts Time.new'

What's wrong with

   config = MySettings.new('basic_config')

   [or config = MySettings.new('basic_config.yml') ]

where the initialize method accepts a file name?


-- 
<https://github.com/stomar/>