Learn C and Build Your Own Lisp (2014) - https://news.ycombinator.com/item?id=17478489 - July 2018 (86 comments)
Learn C and build your own Lisp - https://news.ycombinator.com/item?id=10474717 - Oct 2015 (49 comments)
Learn C and build your own Lisp - https://news.ycombinator.com/item?id=7530427 - April 2014 (145 comments)