class variables from modules

[Florian Weber]

hi!

how can i make that the example below returns 'Hello, my name is test'?

module Barable
def self.append_features(base)
base.extend(ClassMethods)
super
end

module ClassMethods
def bar(bar)
@bar = bar
end
end
end

class Foo
include Barable
bar "test"

def hi
puts "Hello, my bar is #{@bar}"
end
end


Foo.new.hi


thanks!

ciao!
florian

 

[David A. Black]

Hi --

hi!

how can i make that the example below returns 'Hello, my name is test'?

module Barable
def self.append_features(base)
base.extend(ClassMethods)
super
end

module ClassMethods
def bar(bar)
@bar = bar
end
end
end

class Foo
include Barable
bar "test"

def hi
puts "Hello, my bar is #{@bar}"
end
end


Foo.new.hi

Your subject line says class variables, but here you're using instance
variables (which always belong to whatever object is 'self' at a given
point in execution). Did you mean @@bar ?


David

 

[Gavin Kistner]

how can i make that the example below returns 'Hello, my name is test'?

One way:

module ClassMethods
attr_accessor :bar
end

class Foo
extend ClassMethods
self.bar = "test"

def hi
puts "Hello, my bar is #{self.class.bar}"
end
end

Foo.new.hi