reverse.ts

function revWithReduce(str: string): string {
   return str.split("").reduce((acc, curr) => curr + acc, "");
}

function revWithLoop(str: string): string {
   let reversed = "";

   for (let i = str.length - 1; i >= 0; i--) {
     reversed += str.at(i);
   }

   return reversed;
}

function revWithRecursion(str: string): string {
   if (!str) return "";
   return rev(str.substring(1)) + str.charAt(0);
}