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Category:Smalltalk: Difference between revisions
→Class Variables (Statics)
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====Class Variables (Statics)====
These are visible inside a class and shared with all of its subclasses. They have the lifetime of the defining class. The same binding is shared with all subclasses, thus the value is seen in the defining class and all of its subclasses. Typically, these are used for constants. Class variables are defined in the class definition message when the class is instantiated or redefined by setters to the class.
====Instance Variables====
These are the slots where the private state of an object is held. Instances have the same structure (layout), but each has its own values. The instance layout is defined in the class definition message when the class is instantiated or redefined by setters to the class.
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