[Newbie] Morph class>>new

Anthony Hannan ajh18 at cornell.edu
Tue Apr 15 00:36:58 UTC 2003

Christian Hofer <Christian.Hofer at gmx.de> wrote:
> Or would it crash my system if I would change:
> Morph class>>new
> to:
> ^self basicNew initialize

Since "super new" (Behavior>>new) calls the same primitive as "self
basicNew" (Behavior>>basicNew) you would get the same effect.

> (I haven't dared yet.) I mean, this is simply what I have read in Kent
> Beck's Best Practice Patterns (IIRC), that 'super new initialize' has the
> disadvantage that it forbids me to override this method in a subclass, if I do not
> want "initialize" to be called more than once.

I don't follow.  Why can't you override it and call super or call
initialize yourself?

> >Object is not, but Object class is a subclass of Behavior.  When sending
> >a message directly to a class, ie. Object new, you are looking up
> >methods in its class, ie. Object class, which has a separate but similar
> >class hierarchy to Object.  Highlight the class button for any class in
> >the browser and choose 'show hierarchy' from the class pane menu. 
> Ok. But why can't I see it with 'browse hierarchy' the same way (that's what
> I did)?

'browse hierarchy' ignores instance/class highlight and just shows the
instance hierarchy.  I guess the hierarchy browser designer figured that
since since you can see the class methods by hightlighting the class
button, you don't need to see them in the hierarchy list.


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