Monkey-patching with modules

[Mike Holly]

module Foo
class String
def hi
puts 'hi'
end
end
end

include Foo

x = "hello"
x.hi

Why does this not work?

Thanks.

 

[Joel VanderWerf]

module Foo
class String

You are defining a new class, Foo::String.

Try this here instead:
class ::String

The :: means 'look up String in the global scope'.

 

[Rick DeNatale]

module Foo
class String
def hi
puts 'hi'
end
end
end

include Foo

x = "hello"
x.hi

Why does this not work?

A module is a namespace, so constant names defined inside a module are
nested within the module.

You've defined a new class named Foo::String which is not the same
class as String (a.k.a. ::String)

 

[Mike Holly]

Thanks very much.

 

[thefed]

A module is a namespace, so constant names defined inside a module are
nested within the module.

Is there some equivalent of a variable constant? I'm looking for a
variable that is shared only within the module but is variable.

Basically, a more restrictive global.

Thanks,
aRi

 

[MonkeeSage]

Is there some equivalent of a variable constant? I'm looking for a
variable that is shared only within the module but is variable.

Basically, a more restrictive global.

Thanks,
aRi

Class variable?

Regards,
Jordan