- Composer (proxy + client)
- Anatomy
- Webpage crawling
- Chrome api
- pico
- anki server protocol
- Semantic versioning
- building a phar
- php parsing
- releasing php open source software
- laravel
- cordova
- ionic framework
- nodejs
- debugging
- profiling
- Chinese Mandarin
- Scikit-learn
- Time series
- Apiary
- API writing
- Go
- Typescript
- Logic
- Tensorflow
- Various math concepts (thanks to project Euler)
- Neuroscience
- Automata theory
- Self-reproducing automata
- Cognitive science