What is the difference between structural and nominal typing?
An example of an AI chatbot conversation about structural vs nominal typing in programming languages.
What is the difference between structural and nominal typing?
Structural typing is based on the shape or structure of data, while nominal typing is based on explicit names or identifiers.
Can you give me an example of each?
Sure! In TypeScript, structural typing allows you to assign an object to a variable if it has the required properties, regardless of its name. In contrast, in Java, nominal typing requires that the types match exactly by name.
Which one is better for type safety?
Structural typing can offer more flexibility and reusability, while nominal typing can provide stronger guarantees about type identity, enhancing type safety.
Are there any languages that use both typing systems?
Yes, some languages like TypeScript use structural typing for interfaces but also have nominal typing for classes, allowing a mix of both.
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