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Subject: two problems
From: Romain Lorrilliere (romain.lorrilliere@ese.u-psud.fr)
Date: Tue Feb 28 2006 - 14:56:27 CET
Dear colleagues,
in my model, I have two problems?
I have two kind of located agent, and the both are specialization of a
super
class where lot behaviours are defined.
By example the "pov" is define in the super class.
The first it's a problem of "pov".
The "pov" is defined in the super class by this instruction:
"---------------"
povTurtle
^self
class name
"---------------"
In both located agent I have defined the symbol. But each time when I
open my
model I lost this symbol and I must define it again.
I don't understand why my model forgets the symbols of my "pov"
The second it's a problem of polymorphism.
When I want use the polymorphism for apply a method to all instances,
my model
can't to do. The super class didn't now the instances of the both
specialized
class, and I must have made methods to do that:
"---------------"
updateTurtleNat
|turtlNat|
turtleNat := OrderedCollection new.
turtleNat := self index: self theTurtleNatFemales in:
turtleNat.
turtleNat := self index: self theTurtleNatMales in:
turtleNat.
self theTurtleNats: turtleNat.
"---------------"
index: turtle in: turtleSet
turtle do:[:t| turtleSet add: t].
^turtleSet
"---------------"
Do you know why ? I knew that the polymorphism is a
characteristic of object language like SmallTalk.
Thanks for reply.
Lorrillière Romain
UMR
8079 Laboratoire Ecologie, Systématique et Evolution
Bât.
362
Université
Paris-Sud
91405
Orsay cedex
France
tel : 01 69 15 56 85
fax : 01 69 15 56 96
mobile : 06 81 70 90 70
email : romain.lorrilliere@ese.u-psud.fr