System design interview for IT companies

Programming exercises, code katas and puzzles for your job interview training - or just for fun.

A mutation testing tool for Go.

A library to generate a json diff on java

Basic Keychain Access on Mac computers running Node.js

Questions to ask the company during your interview

Companion repository for blog post showing how to access Touch ID from Java

Apple MacBook Pro TouchBar (NSTouchBar) Cheatsheet and Swift examples

Papers from the computer science community to read and discuss.

A simple TCP proxy written in Perl. Uses IO::Socket::INET and IO::Select for multiplexing.

Just Announced - "Learn Spring Security OAuth":

Solutions to the First Steps in DDD training course

Taking the first steps in domain-driven design

Minimal skeleton for Chrome extension

Github Commands from Google Chrome Omnibox (address bar)

An example of real-time chat application built with netty-socketio and Spring Boot.

A MySQL Schema Versioning and Migration Utility

The dotfiles you see in all my videos

This is the new home of the original DDD Sample app (previously hosted at sf.net)..

Datafield for Garmin watches

A tool to edit and view Garmin Connect IQ Layout elements

Repository containing all the code related to the weightress app blog post

📚 Freely available programming books

A simple web app to book meeting rooms inside an office, built using React and Google Calendar API

A very opinionated inversion of control (IoC) container and dependency injector for Typescript, Node.js or browser apps.

A centralized place for the awesome work started by @mathiasbynens on .macos

Bash script to access the osx keychain, for use in shell scripts.

Using a CNY70 sensor to display bike trainer speed on webserver by Raspberry Pi