What does "design pattern" mean in programming?
design pattern is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.
Definition
A reusable solution to a commonly occurring problem in software design. Patterns are templates — not finished code — that describe a proven structure to adapt to your context. The most influential collection is the Gang of Four book: Singleton, Factory, Observer, Strategy, and more.
Example
"Use the Observer pattern to notify multiple subscribers when a user's status changes — no coupling between publisher and subscribers."
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