Discussion on: Daily Challenge #5 - Ten Minute Walk

// in general we will create a sequence which just retraces itself after a certain time.
function generateWalkSequence(time) {
  if(time % 2 != 0) 
    throw new Error('Time must be even');
  let walkSequence = [];
  let oppositeDirections = [];
  let nextDirection = 'n';
  const directions = [...'nswe'];
  for(let i = 0; i < time/2; i++) {
    // loop selection after index 3
    walkSequence[i] = (nextDirection = directions[i % 4]);
    oppositeDirections[i] = (getComplement(nextDirection));
  }
  return [...walkSequence,...oppositeDirections.reverse()];
}

function getComplement(direction) {
  switch (direction) {
    case 'n':
      return 's';
    case 's':
      return 'n';
    case 'e':
      return 'w';
    case 'w':
      return 'e';
  }
}