From: Saynatkari <ruby-ml@...>
Date: 2005-04-03T23:12:35+09:00
Subject: Re: [EVALUATION] - E03 - jamLang Evaluation Case Applied to Ruby


Le 3/4/2005, "Ilias Lazaridis" <ilias@lazaridis.com> a �crit:

>Ilias Lazaridis wrote:
>> Ilias Lazaridis wrote:
>[...]
>
>>> This document can serve as an flash-start (for people which simply
>>> like to take a look on ruby).
>>>
>>> http://lazaridis.com/case/lang/ruby.html
>>
>> I hope you like the results so far.
>>
>> I need to fill in the interactive session, to close this thread:
>>
>> http://lazaridis.com/case/lang/index.html#run_interactive
>>
>> http://lazaridis.com/case/lang/ruby.html#run_interactive
>
>I've tried this:
>
>open command window
>change to project directory
>cmd: irb
>within irb
>cmd: require 'talker'
>
>talker is created, produces output.
>
>but: the "talker" instance which was created during read in (of
>talker.rb) has died.
>
>why?

Local variables evaluated during a require() are not accessible
from outside the file; you may consider this such that the file
is the scope within which the variable is defined, just like in
a method body.

>how do i read-in files, which produce instances, which 'survive'?

Global variables (although this practice would be discouraged),
which are identified by a $-prefix, e.g. $global = 'something'.
Come to think of it, constants may also be accessible.

Normally one will have either an accessor method of some sort
or simply provide the means of _creating_ an instance.

>and: how do I delete an instance? [tried: del, delete, kill, rm, free]

One cannot explicitly delete an instance. It will be 'deleted'
(marked for garbage collection) once it is without references.

E

No-one expects the Solaris POSIX implementation!