Who own the constants?

ruby-talk
1

Hi

Who keeps the constants defined within a Module of the Class?

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

Regards,
Rohit

2

"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

3

From: Robert Klemme [mailto:bob.news@gmx.net]
Sent: Thursday, June 10, 2004 4:34 PM
To: ruby-talk ML
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"?

Sorry. Typo. Module or 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:

Thanks for this info.

Regards,

rolo

ยทยทยท

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