新技術(shù)一直在不斷變化，掌握一些基礎(chǔ)是未來學(xué)習(xí)不斷更新的技術(shù)的堅(jiān)實(shí)基礎(chǔ)。近來閑來無事,為了溫習(xí)一下從前學(xué)的數(shù)據(jù)結(jié)構(gòu)，將數(shù)據(jù)結(jié)構(gòu)中的排序算法用JS實(shí)現(xiàn)了一遍，

最近開始學(xué)習(xí)數(shù)據(jù)結(jié)構(gòu)。

一點(diǎn)一點(diǎn)整理，希望能堅(jiān)持下來。

因?yàn)榉较蚴乔岸?，所以用JavaScript實(shí)現(xiàn)。

//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();//排序結(jié)果：[15, 19, 2, 26, 27, 3, 36, 38, 4, 44, 46, 47, 48, 5, 50]
testArr2.sort(function(a,b){return a>b});//排序結(jié)果：[2, 3, 4, 5, 15, 19, 26, 27, 36, 38, 44, 46, 47, 48, 50]
testArr3.sort(function(a,b){return a-b});//排序結(jié)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);//排序結(jié)果：[2,3,4,5,15,19,26,27,36,38,44,46,47,48,50]
bubbleSort2(testArr2);//排序結(jié)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];//初始時(shí)設(shè)未排序的第一個(gè)值為選中值
     var slcIdx;//記錄一次循環(huán)后作為選中值的index
     for(j=i;j<array.length;j++){  
      if(array[j]<slc){
       slc=array[j];
       slcIdx=j; 
      }
     }
   if(slc!=test[i]){//如果最后作為選中值的值和初始slc值不相等
    var temp=array[i];
    array[i]=array[slcIdx];
    array[slcIdx]=temp;
   }
  }
}
selectSort(testArr);//排序結(jié)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小于數(shù)組的長度-1，否則會(huì)造成數(shù)組越界，形成死循環(huán)
    var curElement=array[i+1];
    for (var j = i; j >= 0; j--) {
      if(curElement<array[j]){
        array[j+1]=array[j];
        if(j==0){//當(dāng)j==0時(shí)，說明已經(jīng)排到了數(shù)組的最開頭
          array[0]=curElement;
        }
      }else{
        array[j+1]=curElement;
         break;
      }
    };
  };
}
 insertSort(testArr);//排序結(jié)果是:[2,3,4,5,15,19,26,27,36,38,44,46,47,48,50]

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