我试图使用Ruby模块(mixins)。Ruby:模块,要求包括
我有test.rb:
#!/usr/bin/env ruby
require_relative 'lib/mymodule'
class MyApp
include MyModule
self.hallo
end
和lib/mymodule.rb:
module MyModule
def hallo
puts "hallo"
end
end
很简单的设置。但它不工作:(:?
ruby test.rb
test.rb:8:in `<class:MyApp>': undefined method `hallo' for MyApp:Class (NoMethodError)
from test.rb:6:in `<main>'
哪里是我的错误