chun1hao

```javascript function multiRequest(urls, maxNum){ let res = [], idx = 0, count = 0, len = urls.length; return new Promise((resolve, reject)=>{ let next = function(){ maxNum--; Promise.resolve(urls[idx++]).then(val=> { res[count++] =...

```javascript function convert(list){ let map = new Map() for(let i of list){ map.set(i.id, i) } let res = [] map.forEach(value=>{ if(!value.parentId){ res.push(value) }else{ let item = map.get(value.parentId) item.children = item.children...

```javascript Promise.race = function(promises){ return new Promise((resolve, reject)=>{ for(let i of promises){ Promise.resolve(i).then(resolve, reject) } }) } ```

```javascript function fn(s) { let temps = '',max=0 for(let i=0;i

function (n) { if(n