Composition
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One of most compelling arguments for object oriented programming is code reuse.
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Polymorphism
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One of the Object Oriented Programming concept is the ability of polymorphism. The word, polymorphism is an ancient Greek term. It means many forms. In programming context, polymorphism means an obje…
Upcasting class
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Taking an object reference and treating it as a reference to its base type is called upcasting.
Abstract or Interface
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An abstract class is like an ordinary class except one or more functions or properties is incomplete - ie. a function without implementation or a property without initialisation.
Ask for inheritance
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Inheritance is a mechanism for creating a new class by reusing and modifying an existing class.
Primary Constructor vs Secondary Constructor
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A constructor is a special function that creates a new object. Using var or val in the parameter list makes them accessible from outside the object.
Making recursion more efficient with tailrec
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Recursion is the programming technique of calling the function within the same function. A recursive function uses the result from the previous recursive call. The perfect example for recursion is fi…
Elegant Local Function
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What exactly is local function? It was new to me in Kotlin and thought it is interesting to dig deeper. In a normal class, we have many functions within a class - the functions have names so that we…