快速排序函数quickSort(ary,isDesc){varlen=ary.length;如果(len<3){返回ary;}varbaseIndex=Math.floor(len/2),base=ary[baseIndex];varsmallAry=[],largeAry=[];对于(vari=len-1,cur;i>-1;i--){cur=ary[i];如果（我==baseIndex）{继续;}if(isDesc){cur=base?(largeAry[largeAry.length]=cur):(smallAry[smallAry.length]=cur);}}smallAry[smallAry.length]=base;返回quickSort(smallAry,isDesc).concat(quickSort(largeAry,isDesc));}functionhalfSearch(ary,num){varlen=ary.length,middle=Math.floor(len/2),midNum=ary[middle];如果（len==0）{返回空值；}elseif(num===midNum){returnmidNum;}elseif(midNum>num){返回halfSearch(ary.slice(0,middle),num);}else{returnhalfSearch(ary.slice(middle+1),num);}}vartestAry=[9,2,3,4,1,0,8,4,2];varsortedAry=quickSort(testAry);console.log(sortedAry,"快速排序");console.log(testAry,"原始数组");console.log(halfSearch(sortedAry,3),"二分查找");冒泡排序varcommon=require('./common');functionbubbleSort(ary){console.time('冒泡排序需要时间');varlen=ary.length;for(vari=0;iary[j+1]){vartmp=阿里[j];元[j]=元[j+1];阿里[j+1]=tmp;}}}console.timeEnd('冒泡排序需要时间');returnary;}functionbubbleSort2(ary){console.time('改进冒泡排序需要时间');vari=ary.length-1;while(i>0){变量pos;for(varj=0;jary[j+1]){pos=j;vartmp=ary[j];元[j]=元[j+1];阿里[j+1]=tmp;我=位置；}}console.timeEnd('改进冒泡排序需要时间');returnary;}varary=common.createAry(200);console.log("排序前",ary.toString());varresult=bubbleSort(ary);console.log(result.toString(),"排序后冒泡排序");console.log(tmp.toString());result=bubbleSort2(tmp);console.log(result.toString(),"改进冒泡排序后");选择排序varcommon=require('./common');functionchooseSort(ary){console.time("选择排序耗时");varlen=ary.length,tmp,minIndex;for(vari=0;i=0&&key
