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gkatz (5) [Avatar] Offline
#1
from the book:
The constructor #4 for this classis is an extension method. ItÂ’s exact duplicate of the
previously created PremiumCar constructor, with the addition of the call to the parent class
constructor via this.callParent(arguments);. This statement allows the subclass to
chain the constructor method calls, effectively allowing the MyApp.car.BaseCar superclass
constructor to execute within the scope of new instances of our MyApp.car.PremiumCar
subclass.

this is not clear at all.
in general, why use this.callParent(arguments) as oposed to this.callParent()