Take a Ten Minutes Walk

題目連結

https://www.codewars.com/kata/54da539698b8a2ad76000228

解法

function isValidWalk(walk) {
  let x = 0
  let y = 0

  if ( walk.length !== 10 ){
    return false
  }

  for (let i=0; i<10; i++){
    if ( walk[i] === 'n' ){
      x +=1
    }else if ( walk[i] === 'e' ){
      y +=1
    }else if ( walk[i] === 'w' ){
      y -=1
    }else if ( walk[i] === 's' ){
      x -=1
    }
  }

  return  x === 0 && y === 0
}