Ruby require include

• "Require" can be merged into. RB proposal, and can be omitted ". RB ". in addition, it will only commit at the first time. If it is "require" again, it will ignore

       Require'A'
  
  A=A.New

   

• "Load" is the same as "require", but it must use the full name of A. RB, and it will be re-written every time.

         Load'A. Rb'
  
  A=A.New
   
  

• What about the sequence of program arguments (similar to Java class path )? Ruby makes this resource exist "$:" in the system's global changes, you can useRubylibOr Ruby-I to add a new ingress.

         Puts $:
   
  

• "Include" is used to mix-in a certain model, which can reduce the length of the limit.

         Require'Webrick'
  Include webrick
  
  //You do not need to use Server = webrick: httpserver. New (...)
  Server=Httpserver.New(...)