Composite is a structural pattern that lets you compose objects into tree structures and then work with these structures as if they were individual objects. It treats both single objects (leaves) and groups of objects (composites) through the same interface — so the client never needs to distinguish between the two.
ℹ️Core idea: if the client code has to treat simple elements and containers differently, it becomes harder to program. Composite makes them interchangeable — a folder and a file both respond to getSize(), open(), etc.
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