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💡 Ever looked at a class and wondered why one small change breaks ten other things?That’s usually a sign your code violates one of the SOLID principles — the five key guidelines that help developers build robust, maintainable, and testable software....

1. Introduction Ever wondered why you found yourself modifying the same class to accommodate unrelated features? Imagine having a class responsible for processing invoices, but over time, it has become the go to class to fix issues related to databas...
