Check if an object is an instance of a given class or of a subclass of it

Question

Is there an easy way to do this in Smalltalk? I'm 80% sure that there is some method but can't find it anywhere. I know that I can use ``` (instance class = SomeClass) ifTrue: ``` And I know that I can use `superclass` etc... but I hope that there is something built in :)

Accepted Answer

To test whether anObject is instance of aClass:

```
(anObject isMemberOf: aClass)
```

To test whether it is an instance of aClass or one of it subclasses:

```
(anObject isKindOf: aClass)
```

Check if an object is an instance of a given class or of a subclass of it

Solution

Problem