Generic Methods in Classes
123456789class DataProcessor { processItem<T>(item: T): string { return `Processing item: ${item}`; } } const processor = new DataProcessor(); console.log(processor.processItem<number>(42)); // Processing item: 42 console.log(processor.processItem<string>("hello")); // Processing item: hello
You often need flexibility in your class methods, especially when a method should work with a variety of types. In these situations, you can define a generic method within a class. A generic method allows you to specify a type parameter only for that method, rather than for the entire class. This is particularly useful when only one or a few methods require type flexibility, while the rest of the class remains type-specific.
By contrast, a generic class makes the entire class generic, meaning all properties and methods can use the generic type parameter. You should use a generic class when the type flexibility is needed across the whole class—for example, when storing or managing collections of different types.
Choose a generic method when only a specific method needs to be generic, and use a generic class when the entire class or most of its members need to work with a generic type.
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Can you explain the difference between a generic method and a generic class with more examples?
When should I use a generic class instead of a generic method?
Are there any limitations or best practices for using generics in TypeScript?
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123456789class DataProcessor { processItem<T>(item: T): string { return `Processing item: ${item}`; } } const processor = new DataProcessor(); console.log(processor.processItem<number>(42)); // Processing item: 42 console.log(processor.processItem<string>("hello")); // Processing item: hello
You often need flexibility in your class methods, especially when a method should work with a variety of types. In these situations, you can define a generic method within a class. A generic method allows you to specify a type parameter only for that method, rather than for the entire class. This is particularly useful when only one or a few methods require type flexibility, while the rest of the class remains type-specific.
By contrast, a generic class makes the entire class generic, meaning all properties and methods can use the generic type parameter. You should use a generic class when the type flexibility is needed across the whole class—for example, when storing or managing collections of different types.
Choose a generic method when only a specific method needs to be generic, and use a generic class when the entire class or most of its members need to work with a generic type.
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