This is an example of Golang code I was asked to review on one of interviews I had passed ;)
Original code version - https://github.com/evt/golang-code-to-review/commit/55f78028c8f98ed81b818d5756f1aaa6c69356e8
Improved one - https://github.com/evt/golang-code-to-review/commit/bb7eea5c1c73171ac4e7f3ef7fbca4d9c308c84c