From: Jim Deville <jdeville@...>
Date: 2008-11-26T03:42:29+09:00
Subject: [ruby-core:20096] Re: [Bug #796] dynamic constant assignment

> -----Original Message-----
> From: Yukihiro Matsumoto [mailto:matz@ruby-lang.org]
> Sent: Tuesday, November 25, 2008 10:39 AM
> To: ruby-core@ruby-lang.org
> Subject: [ruby-core:20095] Re: [Bug #796] dynamic constant assignment
>
> Hi,
>
> In message "Re: [ruby-core:20091] [Bug #796] dynamic constant
> assignment"
>     on Wed, 26 Nov 2008 03:05:12 +0900, Francois Proulx <redmine@ruby-
> lang.org> writes:
>
> |I understand the difference in the use of variable and constant. But
> sometime you need to be able to assigned a value dynamiquely when you
> are initializing your application. I see 2 possibility to address the
> problem:
> |
> |- a interpreter's directive (which would demand a major change of the
> interpreter)
> |- a method to allow specificely a dynamic assignment
>
> You have Module#const_set, and to avoid duplicate assignment warning,
> you need to remove the old constant first by Module#remove_const.
>
>                                                         matz.
>

What about a conditional dynamic assignment. It would be nice to have an idiom such as:

CONST ||= "foo"

I've wanted this in the initializer before, and I end up using a ternary and Module#const_set