Lesson 05 · 15 min
Design patterns: strategy, factory, observer
Three patterns that show up in every project, even when nobody calls them that.
15 minLesson 5 of 5Practice includedAsk AI on any point
A design pattern is a name for a typical solution to a typical problem. The best known catalog is the book "Design Patterns" (1994) by the "Gang of Four". The value of patterns is not in the code but in the vocabulary: say "this is a strategy" and a colleague understands the structure right away.
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