reverseCharArray.js

// reverse character array

const reverse = arr => {
  if (arr.length === 1) return arr;
  let left = 0;
  let right = arr.length - 1;
  while (left < right) {
    [arr[left], arr[right]] = [arr[right], arr[left]];
    left++;
    right--;
  }
  return arr;
};

const reverseString = str => reverse(str.split("")).join("");

const array = ["a", "b", "c", "d", "e", "f", "g"];
const string = "This is a string";

reverse(array);

console.log("array: ", array);
console.log("reverseString(string): ", reverseString(string));