Observer: The YouTube Subscribe Pattern
You subscribe to a YouTube channel and hit the bell. Now, whenever the creator uploads, you get notified automatically. You don't sit there refreshi…
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Facade: The Hotel Reception Pattern
You check into a hotel. You want a room sorted, a taxi booked, dinner reserved, and a wake-up call. Do you hunt down the housekeeping department, th…
Adapter: The Travel Plug Pattern
Adapter: The Travel Plug Pattern This is the easiest design pattern to understand, because you've literally held one in your hand. The travel plug Y…