The Queue data structure implementation is studied in most Computer Science courses on Data Structure and Algorithms. In this post, you will learn one implementation of this important data structure. One of my favourite books to study data structure is Introduction to Algorithms by Cormen. What is a Queue A queue is a linear data …
Queue data structure implementation in Java (using linked lists) Read More »
Graph Data Structure is an important tool to model real-world situations. In this post, you will learn one of the implementations of the TDA and an example of how to use it. To use a graph, you first have to understand when and why you can use it. As in other topics, you will find …
Undirected Simple Graph Data Structure: Implementation and usage in Java Read More »
The General Tree data structure is one of the classic data structures studied in a Data Structure and Algorithms course. You will learn here how to implement the general tree data structure. So, let’s start by stating what do we mean by General Tree. General Tree Definition A tree is a mathematical model. Therefore, it …
General Tree Data Structure: implementation and usage in Java Read More »
The Stack data structure has many applications in programming. In this post, you will learn what are the Stack operations and how to use them to solve real-life problems. Stacks in the real world Programming is about modelling real-life situations. The use of stacks is not the exception. The Tower of Hanoi is a game …
Using the Stack data structure in Java (with examples) Read More »
The List data structure is one of the most used data structures in any programming language. Therefore, it is important to learn what it is and how to use it. What is a data structure? In Computer Science, we consider a data structure as a way to organize data to enable us to efficiently access …
At the end of this post, you will find three cheat sheets. A Java, C# and a Python Cheat Sheet and the other one for C#. When you download the files, you will see the most common constructs of each language used in Object-Oriented Programming. Notice that in these cheat sheets, you will find only …
Abstract class concept is one of the basic concepts of Object-Oriented Programming. It gives us the possibility of modelling concepts from the real world and facilitates the use of one of the OOP principles: code reuse. An abstract class in Object-Oriented Programming (OOP) is a class that cannot be instantiated. In other words, you cannot …
What is an Abstract Class in Object Oriented Programming Read More »
Parameters is a very important topic in Object-Oriented Programming and other programming paradigms. It enables you to define input for algorithms implementations in a certain programming language. During many years of teaching programming, I observed that many students struggle to fully grasp this concept and use it when required. In this article, I’ll give a …
Beginners usually struggle to grasps OOP concepts. I trust that with this illustrated guide, beginners will get a better understanding of the basic OOP concepts. What is programming? “The process or activity of writing computer programs.” Oxford dictionary. “A computer program is a collection of instructions that can be executed by a computer to perform …
Arrays are very important in programming. Because of that, I’ll show you problems and solutions that require the use of arrays. Arrays problem 1: Lenovo Company Consider one of the examples of the previous lessons. ” Lenovo is a PC company that creates and sells laptops. The company has a record of all the laptops …
