Duck Typing vs Runtime Type Information

Developers should learn duck typing when working in dynamically-typed languages to write more generic and reusable code that focuses on what objects can do rather than what they are meets developers should learn and use rtti when building applications that require dynamic polymorphism, such as in frameworks for serialization, reflection, or debugging tools where object types need to be determined at runtime. Here's our take.

Duck Typing

Nice Pick

Developers should learn duck typing when working in dynamically-typed languages to write more generic and reusable code that focuses on what objects can do rather than what they are

Pros

• It's particularly useful for creating flexible APIs, implementing design patterns like strategy or adapter, and handling diverse data structures in a uniform way, such as iterating over collections regardless of their specific type
• Related to: dynamic-typing, polymorphism

Cons

• Specific tradeoffs depend on your use case

Runtime Type Information

Developers should learn and use RTTI when building applications that require dynamic polymorphism, such as in frameworks for serialization, reflection, or debugging tools where object types need to be determined at runtime

Pros

• It is essential in scenarios involving heterogeneous collections, plugin architectures, or when implementing design patterns like Visitor or Factory, as it allows for safe type conversions and error handling without hardcoding type checks
• Related to: object-oriented-programming, polymorphism

Cons

• Specific tradeoffs depend on your use case

The Verdict

Use Duck Typing if: You want it's particularly useful for creating flexible apis, implementing design patterns like strategy or adapter, and handling diverse data structures in a uniform way, such as iterating over collections regardless of their specific type and can live with specific tradeoffs depend on your use case.

Use Runtime Type Information if: You prioritize it is essential in scenarios involving heterogeneous collections, plugin architectures, or when implementing design patterns like visitor or factory, as it allows for safe type conversions and error handling without hardcoding type checks over what Duck Typing offers.

The Bottom Line

Duck Typing wins

Developers should learn duck typing when working in dynamically-typed languages to write more generic and reusable code that focuses on what objects can do rather than what they are

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