Binary: Combinations and Conversion
Learn how numeral system combination tables work and convert between binary, decimal, hexadecimal and octal with simple mental math.
Operating systems
Binary Number System
Learn what the binary number system is, how it relates to decimal, octal, hexadecimal and base 64, and how to read bases and number notations.
Units of Measurement for Information
Learn the units of information: bit, byte, kilo vs kibi, GB vs GiB. Understand the old and new systems so nobody fools you about storage or speed.
Bit
The bit, the basic unit of digital information. It represents two states: the binary system. Something so simple, yet important and full of potential.
Hamming Distance, Weight, Space and Spheres Explained
Learn Hamming distance, Hamming weight, Hamming space and spheres, plus how error-correcting codes detect and fix errors, with Hamming(7,4) as the example.
Hamming Code: Error Detection and Correction
Hamming code to detect and correct errors. Step-by-step examples for fixing errors using redundancy bits and the syndrome matrix. Learn how it works.
Hash Tables (or Hash Maps): How They Work
Hash Table explained simply. What is a Hash Table and how does it work without writing code? A key type of "data structure" every developer should know.
Check Digit – Error Detection
The check digit covers several hash codes, such as the parity bit, the digit generated by the Luhn algorithm, the verification letter of national ID numbers, and more.
Hash Code
How does a hash code work? Hash tables and uses like digest, fingerprint, checksum, redundancy, parity bits, CRC and md5sum, with practical examples.
Android Architecture – ART vs Dalvik
Android architecture explained in a technical yet easy way. ART vs Dalvik compared, APK contents, AOT and JIT compilation, and the Odex vs Deodex difference.
Installing Ubuntu in a Virtual Machine with VirtualBox (Video)
In this video tutorial you'll learn how to install Ubuntu in a virtual machine with VirtualBox, plus the commands to set up a shared folder.
How to Configure Apache on a Linux Server (DigitalOcean) with a Domain and Subdomains (Video)
Learn how to set up Apache on a Linux server at DigitalOcean with your own domain and subdomains using VirtualHosts, step by step, with a video.
How to Create Development Environments with Vagrant and Puppet (Video)
Learn how Vagrant and Puppet let you build portable, reproducible development environments with PHP, MySQL and MongoDB, so your whole team works the same way.