Analysis

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Abstract FactoryAdapterBridgeBuilderChain of ResponsibilityCommandCompositeDecoratorFacadeFactory MethodFlyweightInterpreterIteratorMediatorMementoObserverPrototypeProxySingletonStateStrategyTemplate MethodVisitor

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Analysis

Pattern comparison

Reviewing 3 patterns.

Criteria
creationalPrototypeView pattern
structuralProxyView pattern
behavioralStrategyView pattern
Basics
Categorycreationalstructuralbehavioral
Summary———
IntentSpecify the kinds of objects to create using a prototypical instance, and create new objects by cloning that prototype.Provide a surrogate or placeholder for another object to control access to it.Encapsulate a family of algorithms or behaviors behind a common contract so they can be selected and swapped cleanly.
Decision factors
ProblemCreating new objects from scratch can be expensive or repetitive when the system needs many similar variants.A client needs to interact with an object indirectly because the real object may be expensive, sensitive, or remote.A system needs to switch between interchangeable behaviors without hardcoding branching logic everywhere.
Tradeoffs
  • Can be difficult if the object graph contains deep references that need custom clone behavior
  • May require careful handling of mutable state to avoid shared-reference bugs
  • Adds another layer of indirection
  • Can make the design more complex when the extra control is unnecessary
  • Adds more moving parts than a direct conditional approach
  • Works best when behavior variations are real and likely to grow
Practical fit
Languages
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
  • typescript
  • java
  • python
  • angular
  • react
  • react-native
  • csharp
  • dotnet
Platforms
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
  • Web
  • Backend
  • Mobile
  • UI kits
  • Cross-platform systems
  • Web
  • Backend
  • Services
Integration notesPrototype is useful when object creation is expensive, when many near-identical objects are needed, or when cloning preconfigured templates is simpler than rebuilding them.Proxy is useful for lazy loading, access control, caching, logging, and remote service wrappers.Strategies can cross codebases through shared contracts, API selection rules, or runtime configuration.