Why getters and setters are bad?

Getter and setter methods (also known as accessors) are dangerous for the same reason that public fields are dangerous: They provide external access to implementation details . What if you need to change the accessed field’s type? You also have to change the accessor’s return type.

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Is mixin same as interface?

Mixins are hailed as interfaces with behavioral reuse, more flexible interfaces, and more powerful interfaces. You will notice all these have the term interface in them, referring to the Java and C# keyword. Mixins are not interfaces . They are multiple inheritance.

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