腾娱

😀 腾娱面试总结

📝 主旨内容

一面

1.如何实现埋点的

2.如何在浏览器关闭时进行上报

navigator.sendBeacon

事件循环

项目优化的点

promise

闭包

笔试题

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Bug排查练习</title>
</head>
<body>
  <div id="app">
    <h1>{{ message }}</h1>
    <button @click="changeMessage">Change Message<tton>
  </div>

  <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
  <script>
    new Vue({
      el: '#app',
      data() {
        return {
          message: 'Hello World'
        };
      },
      methods: {
        changeMessage() {
          const promise = new Promise(function(resolve, reject) {
            setTimeout(function() {
              resolve('New Message');
            }, 1000);
          });

          promise.then(function(newMessage) {
            this.message = newMessage;
          });
        }
      }
    });
  </script>
</body>
<html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>indexOf</title>
</head>
<body>
  <script>
    String.prototype.indexOf = function(searchString,position){
        // 完成该函数的实现
        return -1;
    }
    const paragraph = "I think Ruth's dog is cuter than your dog!";

    const searchTerm = 'dog';
    const indexOfFirst = paragraph.indexOf(searchTerm);

    console.log(`The index of the first "${searchTerm}" is ${indexOfFirst}`);
    // Expected output: "The index of the first "dog" is 15"

    console.log(
    `The index of the second "${searchTerm}" is ${paragraph.indexOf(
        searchTerm,
        indexOfFirst + 1,
    )}`,
    );
  </script>
</body>
<html>

二面

笔试题

输入：“10 + 2 * 30 - 0.5” 输出：69.5

const suanshu = (flag, index, result, num) => {
  const pre = num[index] === null ? result : +num[index]
  const next = num[index + 1] === null ? result : +num[index + 1]

  switch (flag) {
    case '+': return pre + next;
    case '-': return pre - next;
    case '*': return pre * next;
    case '/': if (next === 0) throw new Error('除数不能为0');
      return pre / next;
    default: return 0;
  }
}
const caculate = (str) => {
  const flag = []
  const num = []
  let str1 = ""
  const reg = ["*", "+", "-", "/"]

  const precedence = { '+': 1, '-': 1, '*': 2, '/': 2 };

  for (let i in str) {
    const f = reg.findIndex(item => item === str[i])
    if (f !== -1) {
      flag.push(str[i])
      num.push(str1.trim())
      str1 = ""
    } else {
      str1 += str[i]
      if (i == str.length - 1) {
        num.push(str1.trim())
      }
    }
  }
  const flagSortArr = flag.map((item, index) => ({
    name: item,
    sortIndex: index
  })
  ).sort((a, b) =>
    precedence[b.name] - precedence[a.name]
  )
  let result = 0
  const clear = (index1) => {
    flag[index1] = null
    num[index1] = null
    num[index1 + 1] = null
  }
  for (flagItem of flagSortArr) {
    result = suanshu(flagItem.name, flagItem.sortIndex, result, num)
    clear(flagItem.sortIndex)
  }
  return result
}
const teststr = "10 - 20 * 30 / 10 +10"
console.log(caculate(teststr))//-40

笔试题写的有点差劲了

🤗 总结归纳

笔试题相对以前脑子很慢还是转了一点还是有所进步的

最后更新于8个月前

这有帮助吗？