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kotlinlang

does anyone know why they use R to specify the generic type here instead of T? <https://github.com/android/architecture-samples/blob/a6156ad6bb0888aa60bdd587a888679ab2c64e50/app/src/main/java/com/example/android/architecture/blueprints/todoapp/data/Result.kt#L25|https://github.com/android/architecture-samples/blob/a6156ad6bb0888aa60bdd587a8886[…]/example/android/architecture/blueprints/todoapp/data/Result.kt>

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

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

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

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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`:

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&lt;Foo&gt;` would have a sealed class with `Success&lt;Foo&gt;` that contains `val data: Foo`

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