does anyone know why they use R to specify the generic type here instead of T? <https://github.com/a...

# android

[dazza5000]

does anyone know why they use R to specify the generic type here instead of T? https://github.com/android/architecture-samples/blob/a6156ad6bb0888aa60bdd587a8886[…]/example/android/architecture/blueprints/todoapp/data/Result.kt

[Ian Lake]

You can use whatever letter or combination of letters you want. A result of type R makes sense

[dazza5000]

Why would T not make more sense? Would that provide a tighter contract with the success class?

[dazza5000]

also - thank you for the reply

[Ian Lake]

The name does not matter. At all. You could call it ResultType if you want

[Vampire]

I guess the main reason (besides that R can be used if they want) is, that within they use T for the subclasses of the sealed class that uses `R`:

[Vampire]

That would probably clash

[dazza5000]

Would you want a Result Type that matches the Data type you are looking for a result of? I guess I am confused why you would want different types. For example Result<Foo> would have a sealed class with Success<Foo> that contains val data: Foo

[Vampire]

Probably more like "local variable with that name already defined". The inner class has its own type variable.