- 1 current stop: learning
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Finish after stop 5
Stop 1 of 5 · Airport arrivals: socket shapes
Trick to keep in mind+3 XP
Adapter is a travel plug. Decorator is a phone case. Facade is the reception desk.
All three wrap something, so judge them by intent. An adapter makes a foreign class fit the interface your code already expects. A decorator wraps an object so that it can be used anywhere the original could, while adding behaviour, which is why decorators can be stacked. A facade offers a new, smaller front door to a whole subsystem.
Read it once, then a question tests whether the trick stuck.