TakeATenMinutesWalk.js

/**
 * Description:
 *
 * You live in the city of Cartesia where all roads are
 * laid out in a perfect grid. You arrived ten minutes too
 * early to an appointment, so you decided to
 * take the opportunity to go for a short walk.
 * The city provides its citizens with a Walk
 * Generating App on their phones -- everytime you press
 * the button it sends you an array of one-letter
 * strings representing directions to walk
 * (eg. ['n', 's', 'w', 'e']).
 * You always walk only a single block for each letter
 * (direction) and you know it takes you one
 * minute to traverse one city block, so create a function
 * that will return true if the walk the app gives you will
 * take you exactly ten minutes (you don't want to be early or late!)
 * and will, of course, return you to your starting point.
 * Return false otherwise.
 *
 * Note: you will always receive a valid
 * array containing a random assortment
 * of direction letters ('n', 's', 'e', or 'w' only). It
 * will never give you an empty array
 * (that's not a walk, that's standing still!).
 *
 * Kata URL: https://www.codewars.com/kata/54da539698b8a2ad76000228
 *
 *
 * @param {*} walk
 * @returns
 */

function isValidWalk(walk) {
  let positionX = 0;
  let positionY = 0;

  if (walk.length === 10) {
    walk.forEach((element) => {
      if (element === "n") {
        positionY++;
      }
      if (element === "e") {
        positionX++;
      }
      if (element === "s") {
        positionY--;
      }
      if (element === "w") {
        positionX--;
      }
    });
    if (positionX === 0 && positionY === 0) {
      return true;
    } else {
      return false;
    }
  } else {
    return false;
  }
}