Class String in a module

Ruby
1

Hi all

I have a module file which contains ‘class String’ and a couple of
custom methods for me to add to Object::String. So I do something like:
require ‘mystring’ or load or whatever. It doesn’t extend String’s
functionallity… no doubt because the modules contents are isolated
in their own namespace… How to get around that?

Many thanks

Gabriel D.

[email protected]

2

Alle lunedì 6 agosto 2007, Gabriel D. ha scritto:

Gabriel D.

[email protected]

Do you mean the following situation?

file mystring.rb

module MyMod

class String

…

end

end

In this case, you’re right. This piece of (pseudo) code creates the
class
MyMod::String, which is a completely different thing from the String
class.
If you want to extend String, you simply have to move the class
String;…;end part outside the definition of module MyMod:

file mystring.rb

class String

…

end

module MyMod
…
end

I hope this help

Stefano

3

Gabriel D. wrote:

Hi all

I have a module file which contains ‘class String’ and a couple of
custom methods for me to add to Object::String. So I do something like:
require ‘mystring’ or load or whatever. It doesn’t extend String’s
functionallity… no doubt because the modules contents are isolated in
their own namespace… How to get around that?

Use the global scope operator (at least I think that’s what it’s
called):

module M
class ::String
def backwards; reverse; end
end
end

puts “24”.backwards # => 42

4

maybe :

module MyMod
String = String
end

?