Check Instructions
Check Instructions are like assert - they act like a constraints that must be met before it could proceed. Usually, they are used to validate function argume...
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Kotlin Exception Handling
Failure is always a possibility
Companion Object
Companion Object
Inner class
Inner class
Object Object Object
What is object
Nested class
Nested Class
Sealed class in Kotlin
To constrain a class hierarchy, we have to declare the superclass sealed. Without the constraint, our code will look like this:
Downcasting
Downcasting is to discover the specific type of a previously upcast object. Upcast is always safe because the base class cannot have a bigger interface than ...