Design patterns from the Gang of Four still matter in Ruby, but Ruby's language features change how they're implemented. Duck typing, blocks, modules, and metaprogramming compress many classic patterns into simpler, more idiomatic solutions. For example, the Strategy pattern needs no interfaces or abstract classes in Ruby — duck typing handles it naturally. Blocks replace entire class hierarchies for callbacks, and modules encourage composition over inheritance. The Singleton pattern is built into Ruby's standard library. The key insight is that patterns describe design decisions and shared vocabulary, not specific code templates, so understanding them remains valuable even when Ruby makes the implementations much smaller.
Table of contents
Design Patterns Are About Problems, Not CodeRuby Gives Us Different Building BlocksDuck TypingBlocks Replace Entire Class HierarchiesModules Encourage CompositionOpen Classes and MetaprogrammingSome Patterns Become SmallerBut Patterns Still MatterLooking AheadShare this:Related584 Impressions