Problem Statement

Take a string and reverse it. For example, "asdf" becomes "fdsa".

Preserve Unicode combining characters. For example, "as⃝df̅" becomes "f̅ds⃝a", not "̅fd⃝sa".

Let's start with the solution:

var s = "socat".*;
std.mem.reverse(u8, &s);

var s = "socat".*;
std.mem.reverse(u8, s[0..]);