MENTAL MODEL · M2224

Design Patterns

CreateHigh supportDesign Thinking

Included

Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Proposed by Christopher Alexander and popularized by the Gang of Four. It summarizes a set of common, reusable solutions (such as Singleton pattern, Factory pattern) for recurring problems in software development.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Experience routinization: Don't reinvent the wheel. When solving a problem, first search for existing mature "design patterns". This is a shortcut from novice to expert.

anchor

Anchor fast decisions

Reusable, time-tested "problem-solution" templates: for recurring situations in software design, provide proven structures and role assignments, making communication more efficient and changes more stable. GoF categorizes them into creational, structural, and behavioral patterns.

MINIMUM ACTION

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Practice this model in one real situation:

Understand the essence of the problem rather than forcing a pattern
Choose mature patterns appropriately (e.g., Factory, Decorator, Observer)
Use pattern names to precisely communicate design intent
Avoid over-design—do not introduce patterns when there is no recurring problem.

Check to track your progress (stored locally)

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Source support: Explicit

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en.wikipedia.orghttps://en.wikipedia.org/wiki/Design_PatternsZH · Explicit
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