The Gang of Four's Design Patterns

Short summary

The Gang of Four's 1994 design patterns remain essential blueprints for solving recurring software problems, categorized into creational, structural, and behavioral types. Real-world examples show measurable impact: Adapter pattern reduced coupling at 20% overhead; Flyweight reduced memory by 30%. Apply patterns strategically to solve actual problems, not arbitrarily.

• •Design patterns are documented solutions that create shared vocabulary among engineers
• •Patterns grouped as creational (object creation), structural (object composition), behavioral (communication)
• •Use patterns when they improve code; simple solutions often outperform over-engineered patterns

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