topic Re: The self reference ME in Application Development and Automation Discussions

The self reference ME

Former Member — Tue, 22 Jun 2010 12:50:02 GMT

hi please tell me about this 'ME'.

When this need to be used and why it is needed .

I read following sentence from the documentation..

'Each instance method contains a predefined reference varaiable of the type of the current class.This variable is called ME'.

Re: The self reference ME

Former Member — Tue, 22 Jun 2010 12:59:40 GMT

when you are using the methods and/or attributes of an instance of your class, you can reference them bei using me->your_method or me->your_attribute. this way you and others can see in your coding, that you are using an attribute and not just a local variable or the method of another class.

greetings,

dsp

Re: The self reference ME

Former Member — Tue, 29 Jun 2010 07:28:44 GMT

Me keyword is used to access its own method of the class.

it is the self reference to a method of the same class

Regards

Hari

Re: The self reference ME

Former Member — Mon, 05 Jul 2010 13:32:43 GMT

Hi there,

you might want to look at some [examples|http://wiki.sdn.sap.com/wiki/display/Snippets/ABAPObjects-CreatingyourFirstLocalClass-Usingself-referenceInINHERITING] on SDN wiki. They are contrived, and overuse of name overloading is bad practice in my view, but they should give you an idea of what me (and super) are all about.

-- Sebastian

Re: The self reference ME

Sandra_Rossi — Mon, 05 Jul 2010 15:44:53 GMT

Concept of "Me" -> http://en.wikipedia.org/wiki/This_(computer_science)

Re: The self reference ME

Former Member — Thu, 08 Jul 2010 15:14:22 GMT

The self reference me-> is used to clearly distinguish class attribute and a local variable. Here is an example:

CLASS lcl_appl DEFINITION.
  PUBLIC SECTION.
    METHODS: init.
  PRIVATE SECTION.
    DATA: a TYPE c LENGTH 2 VALUE '10'.
ENDCLASS.                 


CLASS lcl_appl IMPLEMENTATION.
  METHOD init.
    DATA: a TYPE c LENGTH 2 VALUE '20'.
    WRITE me->a.
    WRITE a.
  ENDMETHOD.                  
ENDCLASS.                 

DATA: oref_appl TYPE REF TO lcl_appl.

START-OF-SELECTION.
  CREATE OBJECT oref_appl.
  oref_appl->init( ).

Guess the output?

Re: The self reference ME

Former Member — Thu, 22 Jul 2010 08:31:36 GMT

Me is equal to THIS operator in Java as You can refer to any member of the current object from within an instance method or a constructor using yor ME operator.

Thnaks