sine
sine
``` function getIndex(arr){ let index=null; let min = arr[0]; let len = arr.length; for(let i = 0; i < len;i++){ if(arr[i] > 0){ if(min > arr[i]){ index = i; min...
``` var a = 1; if(!(a == 1 && a == 2 && a == 3)){ console.log(1); } ```
```js //js 实现indexof Array.prototype._indexOf=function(res,fromIndex){ let len = this.length; if(len === 0) return []; if(fromIndex > len){ fromIndex = len; } if(fromIndex
你们确定看完了简介了？