What he is showing is how someone who knows Rust well, would potentially approach this problem. What you're point out is that it's a large bar to ask a new com

What he is showing is how someone who knows Rust well, would potentially approach this problem. What you're point out is that it's a large bar to ask a new comer to the language to do this because it requires a deeper understanding of the language to use. Is it not appropriate to show that you can reduce the complexity of a program by using other features of the language? It's not significantly different from reducing x + x + x + x To 4x