#jumathek6

challenge-6.js

class Brankas {
  unlock(key) {
    const keys = key.split('')
    let turned = 0,
      lastPosition = 0,
      isForward = true;

    for (let i in keys) {
      // Key less than last position and is forward, turnaround backward
      // Or key greater than last position and is turnaround before, turned again forward
      if ((keys[i] < lastPosition && isForward && keys[i] != 0) ||
        (keys[i] > lastPosition && !isForward)) {
        isForward = !isForward, turned += 1
      }
      lastPosition = keys[i]
    }

    console.log(`${key} h#: ${turned}`)
  }
}

new Brankas().unlock('187427')
new Brankas().unlock('21245')
new Brankas().unlock('1092848')