aka The Law of Demeter aka Principle of Least Knowledge is a design guideline for developing software, particularly object-oriented programs. The Law of Demeter is a specific case of loose coupling. The guideline was invented at Northeastern University in 1987 and can be summarized in one of the following ways:
The fundamental notion is that a given object should assume as little as possible about the structure or properties of anything else (including its subcomponents).
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