Function withBoxUnlocked

code/solutions/08_2_the_locked_box.js:13–21

(body)

};

function withBoxUnlocked(body) {
  let locked = box.locked;
  if (locked) box.unlock();
  try {
    return body();
  } finally {
    if (locked) box.lock();
  }
}

withBoxUnlocked(() => {
  box.content.push("gold piece");