ByteDance Interview Round 3

When we are discussing about my projects. The interviewer asked the following questions:

1. How do you achieve infinite play effect in a carousel?
2. Use JS to achieve #id's scroll to element effect.
3. CSS animation.

After done talking my projects, I was asked a few questions about Promise, linked list, and heap sort, insertion sort.

Programming Questions

Promisify setTimeout. Implement wait(seconds).then(()=>{})

function wait(seconds) {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve();
    }, seconds * 1000);
  });
}

wait(3).then(() => {
  console.log(1);
});

Implement a timeout function.

function timeout(promise, seconds) {
  return new Promise((resolve, reject) => {
    const timer = setTimeout(() => {
      reject();
    }, seconds * 1000);

    promise.then(() => {
      clearTimeout(timer);
      resolve();
    });
  });
}

timeout(wait(3), 4)
  .then(() => {
    console.log("the p was completed within 4s");
  })
  .catch(() => {
    console.log("the p execution time exceed 4s");
  });

Implement a priority queue. This relates to heap data structure.

class PQ {
  push() {}
  pop() {}
}

Feedback

房产-app H5 页面，中后台

房产交易 家具

sort 场景，遍历对象，复杂数据结构 获取数据

多实践

heap sort

轮播，滚动，多总结

重新实现组件