From: Robert Klemme <bob.news@...>
Date: 2004-06-10T20:03:37+09:00
Subject: Re: Who own the constants?


"rolo" <rohitlodha@hotwireindia.com> schrieb im Newsbeitrag
news:ACEPLIKLBKEMDDIELPKIGEPICGAA.rohitlodha@hotwireindia.com...
> Hi
>
> Who keeps the constants defined within a Module of the Class?

What do you mean by "Module of the Class"?

> The Class in which it is defined or the last module in the class hierarchy
?

Constants are always owned by the module or class they are defined in
although they are accessible from modules / classes that inherit the
defining class:

>> module Mod; BAR = "hello"; end
=> "hello"
>> Mod::BAR
=> "hello"
>> class Foo; include Mod; FOO = "world"; end
=> "world"
>> Foo::FOO
=> "world"
>> Foo::BAR
=> "hello"
>> Mod::FOO
NameError: uninitialized constant Mod::FOO
        from (irb):6
>> Foo.ancestors
=> [Foo, Mod, Object, Kernel]
>> Foo.constants
=> ["BAR", "FOO"]
>> Mod.constants
=> ["BAR"]

Regards

    robert