Combining Proto and Parent Inheritance
self.slot
, which creates a slot in the child. Or, the method might iterate over its children.
This means that in hierarchies (see FIGURE 4.8), when you need to call MethodA
from inside MethodB
, you should do so with this syntax:
:Parent():MethodA()
and not this syntax:
:MethodA()
The former sends a message to the parent object; the latter sends a message to the child object.
FIGURE 4.8 : A hierarchy of frames.
An online version of Programming for the Newton using Macintosh, 2nd ed. ©1996, 1994, Julie McKeehan and Neil Rhodes.
Last modified: 1 DEC 1996