1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <meta name="viewport" content="width=device-width"> 6 <title>归并排序法</title> 7 </head> 8 <body> 9 归并排序是一种分治算法，其思想是将原始数组分割成较小的数组，直到每个小数组只有一个位置，接着将小数组归并成较大数组，知道最后只有一个排序完毕的大数组。 10 </body> 11 </html>
1 var array=[32,12,45,2,57,1,35,7,9,23,32]; 2 3 function mergeRec(array){ 4 5 var length=array.length; 6 if(length==1) 7 return array; 8 var mid = Math.floor(length/2); 9 var left = array.slice(0,mid); 10 var right = array.slice(mid,length); 11 12 return mergeSort(mergeRec(left),mergeRec(right)); 13 } 14 15 function mergeSort(left,right){ 16 var result=[]; 17 do 18 { 19 if(left[0]>right[0]){ 20 result.push(right.shift()); 21 } 22 else{ 23 result.push(left.shift()); 24 } 25 } 26 while(left.length>0&& right.length>0); 27 28 return result.concat(left).concat(right); 29 30 } 31 32 var abcd = mergeRec(array); 33 console.log(abcd);
