[1] https://news.ycombinator.com/item?id=21238802
[2] https://medium.com/@brianwill/object-oriented-programming-a-...
[3] https://www.youtube.com/watch?v=QM1iUe6IofM
[4] https://www.youtube.com/watch?v=IRTfhkiAqPw
[1] https://news.ycombinator.com/item?id=21238802
[2] https://medium.com/@brianwill/object-oriented-programming-a-...
[3] https://www.youtube.com/watch?v=QM1iUe6IofM
[4] https://www.youtube.com/watch?v=IRTfhkiAqPw