javascript方法封装

前端经常用到1.数组去重functionunique1(arr){return[...newSet(arr)]}functionunique2(arr){varobj={};returnarr.filter(ele=>{if(!obj[ele]){obj[ele]=true;returntrue;}})}functionunique3(arr){varresult=[];arr.forEach(ele=>{if(result.indexOf(ele)==-1){result.push(ele)}}）返回结果；}2。字符串去重String.prototype.unique=function(){varobj={},str='',len=this.length;for(vari=0;iarr[j]){vartemp=arr[i];arr[i]=arr[j];arr[j]=temp;}}}returnarr;}functionbubbleSort(arr){varlen=arr.length;for(vari=0;iarr[j+1]){vartemp=arr[j];arr[j]=arr[j+1];arr[j+1]=temp;}}}returnarr;