function reverse1(
  stringOrArray: string | any[]
): string | any[] {
  return typeof stringOrArray === "string"
    ? stringOrArray
        .split("")
        .reverse()
        .join("")
    : stringOrArray.slice().reverse();
}


function reverse2(string: string): string;
function reverse2<T>(array: T[]): T[];
function reverse2<T>(
  stringOrArray: string | T[]
): string | T[] {
  return typeof stringOrArray === "string"
    ? stringOrArray
        .split("")
        .reverse()
        .join("")
    : stringOrArray.slice().reverse();
}

function reverse3<T>(
  stringOrArray: string | T[]
): string | T[] {
  return typeof stringOrArray === "string"
    ? stringOrArray
        .split("")
        .reverse()
        .join("")
    : stringOrArray.slice().reverse();

}

reverse1("helo");
reverse1(["helo"]);
reverse2("helo");
reverse2(["helo"]);
reverse3("helo");
reverse3(["helo"]);