Roger Hui has died
For those of you that are not familiar with Roger Hui, he is the author of "An Implementation of J"[0]. Which is a fantastic resource if you want to know how to implement an array programming language.<p>[0]: <a href="https://www.jsoftware.com/books/pdf/aioj.pdf" rel="nofollow">https://www.jsoftware.com/books/pdf/aioj.pdf</a>