Law of Demeter
Domain: Design Principles
🎯 Motivation
An object should only talk to its immediate friends, not strangers. Chaining calls like order.customer.address.city creates tight coupling and fragile code.
📋 Concrete Example
Instead of order.get_customer().get_address().get_city(), ask the order directly: order.get_shipping_city(). The order hides how it computes the city internally.
🔗 Analogy
You ask a friend for a ride home, not for their car keys, engine diagram, and a map. You trust the friend to handle the details and just deliver you.