最近开始学习数据结构。

一点一点整理，希望能坚持下来。

因为方向是前端，所以用JavaScript实现。

//sort排序var testArr1=[3, 44, 38, 5, 47, 15, 36, 26, 27, 2, 46, 4, 19, 50, 48];var testArr2=[3, 44, 38, 5, 47, 15, 36, 26, 27, 2, 46, 4, 19, 50, 48];var testArr3=[3, 44, 38, 5, 47, 15, 36, 26, 27, 2, 46, 4, 19, 50, 48];testArr1.sort();//排序结果：[15, 19, 2, 26, 27, 3, 36, 38, 4, 44, 46, 47, 48, 5, 50]testArr2.sort(function(a,b){return a>b});//排序结果：[2, 3, 4, 5, 15, 19, 26, 27, 36, 38, 44, 46, 47, 48, 50]testArr3.sort(function(a,b){return a-b});//排序结果：[2, 3, 4, 5, 15, 19, 26, 27, 36, 38, 44, 46, 47, 48, 50]

//Bubble排序

var testArr1=[3, 44, 38, 5, 47, 15, 36, 26, 27, 2, 46, 4, 19, 50, 48];var testArr2=[3, 44, 38, 5, 47, 15, 36, 26, 27, 2, 46, 4, 19, 50, 48];function bubbleSort1(array){ for(i=array.length-1;i>0;i--){ for(j=0;j<i;j++){ if(array[j+1]<array[j]){ var temp=array[j+1]; array[j+1]=array[j]; array[j]=temp; } } }}function bubbleSort2(array){ for(i=array.length-1;i>0;i--){ for(j=0;j<i;j++){ if((array[j+1]-array[j])<0){ var temp=array[j+1]; array[j+1]=array[j]; array[j]=temp; } } }}bubbleSort1(testArr1);//排序结果：[2,3,4,5,15,19,26,27,36,38,44,46,47,48,50]bubbleSort2(testArr2);//排序结果：[2,3,4,5,15,19,26,27,36,38,44,46,47,48,50]

//Select排序

var testArr=[3, 44, 38, 5, 47, 15, 36, 26, 27, 2, 46, 4, 19, 50, 48];function selectSort(array){ for(i=0;i<array.length;i++){ var slc=array[i];//初始时设未排序的第一个值为选中值 var slcIdx;//记录一次循环后作为选中值的index for(j=i;j<array.length;j++){ if(array[j]<slc){ slc=array[j]; slcIdx=j; } } if(slc!=test[i]){//如果最后作为选中值的值和初始slc值不相等 var temp=array[i]; array[i]=array[slcIdx]; array[slcIdx]=temp; } }}selectSort(testArr);//排序结果是：[2,3,4,5,15,19,26,27,36,38,44,46,47,48,50]

//Insert排序

var testArr=[3, 44, 38, 5, 47, 15, 36, 26, 27, 2, 46, 4, 19, 50, 48];function insertSort(array){ for (var i = 0 ; i < array.length-1; i++) {//注意i小于数组的长度-1，否则会造成数组越界，形成死循环 var curElement=array[i+1]; for (var j = i; j >= 0; j--) { if(curElement<array[j]){ array[j+1]=array[j]; if(j==0){//当j==0时，说明已经排到了数组的最开头 array[0]=curElement; } }else{ array[j+1]=curElement; break; } }; };} insertSort(testArr);//排序结果是:[2,3,4,5,15,19,26,27,36,38,44,46,47,48,50]