Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!ucdavis!egg-id!beaver!llh
From: llh@beaver.inel.gov (L. Linn Hower)
Newsgroups: comp.windows.news
Subject: Help requested in understanding < self send >
Message-ID: <279@egg-idINEL.GOV>
Date: 22 Feb 89 22:22:44 GMT
Sender: nsadmin@INEL.GOV
Lines: 28


  I am a novice NeWS programmer and am having trouble understanding
the programming concepts I see used in Sun's liteitem.ps.  My question
concerns the use of `self send' in a method of a subclass.  Sometimes
this construct is used and sometimes the method is just executed directly.
What are the differences?

  Specifically, I cannot see the difference between:

	/method0 { ... } def
	/method1 { /method0 self send } def

or
	/method0 { ... } def
	/method1 { method0 } def

What happens different when a /method1 subclass send is executed?  Don't
they both start looking for method0 with the dictstack in the same state?
I can't cause any differences in the test cases I have generated.  What
am I missing?

  Thanks...

  Linn

--
  Linn Hower	lh1@INEL.GOV		Phone: 208-526-9353
		at the Idaho National Engineering Laboratory, Idaho Falls, ID