Ruby Language Modules Modules and Class Composition
Example
You can use Modules to build more complex classes through composition. The include ModuleName directive incorporates a module's methods into a class.
module Foo
def foo_method
puts 'foo_method called!'
end
end
module Bar
def bar_method
puts 'bar_method called!'
end
end
class Baz
include Foo
include Bar
def baz_method
puts 'baz_method called!'
end
end
Baz now contains methods from both Foo and Bar in addition to its own methods.
new_baz = Baz.new
new_baz.baz_method #=> 'baz_method called!'
new_baz.bar_method #=> 'bar_method called!'
new_baz.foo_method #=> 'foo_method called!'
