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Xavier Geerinck

Max number with pipes in C++ and Unix

Max number with pipes in C++ and Unix

Let's say we have x children, these x children all generate a number and give this to the parent. The parent now finds the highest number and sends the children the process id of the winning child. If the winning child recognises itself then it prints that it

Creating a LinkedList with C++

Creating a LinkedList with C++

Linked Lists are one of the fundamental data structures. The main usage of a Linked List is when constant insertion and deletion time is required, or when a dynamic list that can grow and shrink over time is needed. A Linked List exists out of several nodes that are linked

How to benchmark Reading 10MB in C++

How to benchmark Reading 10MB in C++

This article is based on a vagrant Ubuntu system with an SSD so you might encounter different results. When reading and writing files in C++ it is important to use the correct buffer size or the block size. This will drastically improve the time it takes to read in files

Basic OOP with C++

Basic OOP with C++

This article is going to explain 1 example of an Object Oriented Program for C++. We will create a small program that allows us to create figures, these being: * A circle * A rectangle * A square We note that the square is a special rectangle. Then on the end when we

SQL - Recursion

SQL - Recursion

Introduction Recursion in SQL is a lesser known technique, this technique is just like we expect as it would work in any developing language such as C, Javascript, …, it allows us to create a query that will be able to recursively get and process data to find a result. Think

SQL - Part 5 - Common Table Expressions

SQL - Part 5 - Common Table Expressions

CTE's (Common Table Expressions) are mostly used when creating recursive queries, creating temporary views (instead of subqueries). Calculating the dates of easter Use case And Example: We want to calculate the dates of when it is easter for the next hundred years. Solution:Since we are explaining examples

SQL - Part 4 - JOIN + Simulating Functions

SQL - Part 4 - JOIN + Simulating Functions

When creating JOIN queries in SQL we have to realize that we are going to combine every result from the result set with the result set itself. This means that we are going to create a new result set that is the size of the power of 2 of our