The features from this chapters are a bit higher than newbie level.
But still crucial to good programming.
Exceptions is a special, very powerful way to deal with errors.
In most languages, there are classes and objects. Classes inherit from other classes.
var self = this
There are numerous situations when a function must keep the context no matter how it runs, and reference same object.
An object has a build-in property named constructor. It is meant to reference the function which made the object, but it fails to do it sometimes.
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