What is a creational design pattern? — Creational design patterns deals with creation or cloning new objects of a class. Cloning occurs when a similar kind of object already exist and instead of instantiating a new object, we clone the existing one. The different ways of creating objects will greatly influence how a problem is solved. …

Have you played minesweeper before? Well, I believe yes, everyone has played that game during our childhood. But not everyone knows the logic behind that awesome game. Stay with me for this post and believe me I will make it simpler for you and you are going to love it. …

Suppose, you are trying to build a project and it has multiple modules. Different modules may depend on each other for their functionality to work. For example, your project has namely, A, B, and C modules. B depends on A C depends on B A depends on C Here, we…

In the ancient times, when there were no smartphones, the mobile phones used to have a keypad with digits ranging from 0–9 and some special characters like *, # and so on. Digits also had some alphabets along with them to give a messaging facility. Like here, if we want…

What is an adapter pattern? — Welcome to the part 2 of structural design pattern. As we have previously seen in the Facade pattern, it deals with how to simplify the client interaction with a complex system. If you haven’t read about it yet, go check it out: https://medium.com/trick-the-interviwer/structural-design-pattern-1-facade-pattern-a11ff68f2c03 The adapter pattern is a metaphor for…

What is a structural design pattern? — Structural design pattern eases the design by identifying a simpler way to realize the relationships between entities or defines a manner for creating relationships between objects. According to GOF, a façade is basically a wrapper class that encapsulates a subsystem in order to hide the subsystem’s complexity and it acts…

What is a factory method pattern? — Factory method method is also a creational design pattern which deals with instantiating objects of a class. Note: This is part 2 of creational design pattern, if you haven’t read about singleton pattern yet, you can check it out here https://jhanakd26.medium.com/creational-design-pattern-1-singleton-pattern-f0e68766d4fe Consider a situation where you own a pizza shop…

Sorting is a technique used to arrange the collection of objects into either ascending order or descending order. There are many sorting algorithms, and merge sort is one of them. According to Wikipedia, Merge sort is an efficient, general-purpose, comparison-based sorting algorithm. Most implementations produce a stable sort, which means…

As the name suggests, the Collections class of java provides a static method called sort() which is used to sort a collection of items in a particular order. public static <T> void sort(List<T> list, Comparator<? super T> c) { list.sort(c); } Let’s look at the definition of this method. As…