[原创] Ruby 中路径，类（class），模块（module）设置总结

Above are the problems a newer may encounter.
So, I made a summary, expected that, you could gain something from it.

1. class_test.rb
#Define class with class, and it can be continued
class ClassTest
  class ClassTest
  class ClassTest
  def str_output1(str)
  puts "Now, #{str} is putted out, for class test\"
  end
  def self.str_output2(str)
  puts "Now, #{str} is putted out, for class test"
  end
  end
  end
end

2. module_test.rb
#Define module with module, and it can be continued
module ModuleTest
  module ModuleTest
  module ModuleTest
  def arr_output1(arr)
  arr.each {|x| puts x}
  end
  def self.arr_output2(arr)
  arr.each {|x| puts x}
  end
  end
  end
end

3.main_test.rb
require File.dirname(__FILE__) +'/../test1/module_test'
require File.dirname(__FILE__) +'/../test2/class_test'
include ModuleTest::ModuleTest::ModuleTest
class MainTest
  str="God bless with you"
  arr=["God", "bless","with you"]
  
  puts "Now, use method arr_output1(arr) in module_test.rb"
  arr_output1(arr)
  
  puts "Now, use method arr_output2(arr) in module_test.rb"
  ModuleTest::ModuleTest::ModuleTest.arr_output2(arr)
  
  puts "Now, use method str_output1(str) in class_test.rb"
  str2=ClassTest::ClassTest::ClassTest.new
  str2.str_output1(str)
  
  puts "Now, use method str_output2(str) in class_test.rb"
  ClassTest::ClassTest::ClassTest.str_output2(str)
end

Above is about how do deal with
class with class,
module with module,
or module with class,
and how to set the require path.
(If we want to go to Parent Directory, we just need add '/../' after the path "__FILE__"), of course '/../../' is valid.