Grokking SOLID Design Principles
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Break The Hierarchy for Adhering to LSP
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In the previous lesson, we identified the problem where the ElectricCar class violated the Liskov Substitution Principle by failing to implement the refuel() method properly. Now, we will redesign the inheritance hierarchy to follow LSP by introducing a generalized Vehicle class.

Step 1: Create a General Vehicle Class

We’ll begin by creating a generalized Vehicle class, which defines common behaviors shared by all vehicles, such as starting and stopping, and an abstract refuel() method for specific fuel/energy behavior.

The `Vehicle

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