Walkthrough inheritance example bug

[tex23bm]

http://www.typescriptlang.org/Playground

I think the walkthrough on inheritance in the playground might have a bug.

I'm not sure why tom.move is being passed 34 if it's unused. It's not clear to me if that should have thrown a compilation error or what.

Thanks

[DickvdBrink]

It is because the compiler thinks tom is an Animal (not a Horse) because of the type annotation.

If you remove : Animal and try to call tom.move it will show the move method without parameters.

[DanielRosenwasser]

Yes, but that's weird because it's not consistent with how the Handbook has it written - maybe @jonathandturner can check this out and confirm whether that was the intention.

[sant123]

The walkthrough on inheritance in the playground still has a bug. The '34' value is unused yet. I agree it's weird because if you pass a value, you expect it works right?

[HuanhuanSunMSFT]

Hi @jonathandturner @sant123 @DickvdBrink . In this walkthrough, Horse extends Animal, does it also inherited the move method in Animal. From the perspective of C#/JAVA, should tom.move(34) just invokes the move method defined in Animal? Just started playing around TypeScript. This walkthrough example is a little weird to me. Thanks.

[tex23bm]

Yeah, that's essentially what I find confusing.

When you pass a horse a parameter, it's calling a parameter-less function. I would expect the Horse.move function to be called if it matched the signature of the call.

That appears not to be the case.

Also, why was the bug label removed? What's the status on this?

[danquirk]

Seems like we could make this less confusing either with changes to the code or some additional prose.