可亚医疗

8个小球 其中一个比其他7个重 找出 O(logn/3)

• 数组 find、filter区别

// 1. 包含字符的子数组最小成都 // 2. case通过率 // ['test1a', 'af1a', 'af2b', 'bc1a', 'bc1a'] // ['pass', 'fail', 'pass', 'pass', 'pass'] ->2

// 3.xxx // + - C D // 1 -> [1] // 2-> [1,2] // + =>

点是否在三角形中(斜率)、点是否在多边形中

两条线是否相交

点播不自己播放问题

webGL 和canvas坐标信息转换

Promise.resolve().then(() => {
    console.log('promise1');
    setTimeout(() => {
        console.log('setTimeout1')
    },10)
})
setTimeout(() => {
    console.log('setTimeout2')
    Promise.resolve().then(() => {
        console.log('promise2')
    })
}, 30) // 试着调整这个值
// promise1, setTimeout1, setTimeout2, promise2

const isValid = s => {
    let aLen, bLen;
    s.replace(/([ab])\1+/g, ($0, $1) => {
        if($1 === 'a') {
            aLen = $0.length;
        } else if($1 === 'b') {
            bLen = $0.length;
        }
    })
    return {a: aLen, b: bLen, len: s.length}
}
const fn = str => {
    let len = str.length;
    let res = ''
    let aMax = 0,bMax = 0;
    let maxLen = str.length
    for(let i = 0; i < len; i++) {
        for(let j = i; j < len; j++) {
            let s = str.substring(i, j)
            let len = isValid(s);
            if(len.a >= aMax && len.b >= bMax) {
                if(len.a === aMax && len.b === bMax && len.len < maxLen) {
                    res = s;
                    aMax = len.a
                    bMax = len.b
                    maxLen = len.len
                    break;
                }
                res = s;
                aMax = len.a
                bMax = len.b
                maxLen = len.len
            }
        }
    }
    return res;
}
console.log(fn('abaaaabbbbbab'))


// 第二方法
var str = 'abbbbbbbaaaaabbbbbaaa'
let max = 0
let s = '';
let left = 0;
while(left < str.length) {
    str.slice(left).replace(/([ab])\1*([ab])\2*/g, ($0, $1, $2) => {
        if($0.length > max) {
            max = $0.length;
            s = $0;
        }
    })
    left++;
}
console.log(s)

创客贴

1. try catch finally
2. bigint
3. symbol作用
4. requestIdleCallback
5. 强缓存
6. promise catch 返回的是？
7. node setTimeout setImmediate
8. vue技术细节

碳足迹

1. Symbol什么时候相等？
2. 异步错误捕获方法？

字节

1. 模板解析

   let year = 2022;
   let month = 12;
   let day = 31;
   
   let str = render(`${year} - ${month} - ${day}`);
   
   console.log(str);
   function render(str) {
       return str.replace(/\{(\w+)\}/g, function (match, key) {
           return str[key];
       });
   }
   

2. 扑克牌问题

   const shuffle = nums => {
       let res = [];
       while(nums.length) {
           if(res.length > 1) res.unshift(res.pop())
           res.unshift(nums.shift());
       }
       return res;
   }
   

3. 输出值

   console.log(1);
   setTimeout(() => {
       console.log(2)
   }, 100)
   async function test() {
       console.log(3)
       await test1();
       console.log(4)
   }
   function test1() {
       return new Promise(resolve => {
           console.log(5);
           resolve();// 注意这里
       })
   }
   test();
   let a = new Promise(resolve => {
       setTimeout(() => {
           resolve();
           console.log(6)
       })
   }).then(() => {
       console.log(7)
   })
   console.log(8)
   
   // 1, 3, 5, 8, 4, 6, 7, 2  --- resolve 存在输出4 否则不输出
   

4. webgpu? YUV PCM

5. mp4、flv、m3n8