js二维数组排序的简单示例代码

时间:2020-05-13 人气:0

如下所示：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script type="text/javascript">
<!--

function getCard(m){
  var ret = [], rnd;
  for(var i = 0; i < m; i++){
   rnd = Math.floor(Math.random()*(i+0.9999));
   ret[i] = ret[rnd];
   ret[rnd] = i
  }
  return ret;
}

var data = [];
{
  for(var i = 0; i < 100; i ++){
   data.push(getCard(10));
  }
}
// 二维数据排序
function mySort(array, col, ord, b, e){
  if(array.length == 0) return;
  /https://img.qb5200.com/download-x/document.write("排序前"+array);
  var t = [], s, i, curCol = col[0];
  for(i = b; i < e; i ++){
   s = new String(array[i][curCol]);
   s._obj = array[i];
   t.push(s)
  }
  t.sort();
  if(ord[0] == "des"){
   t.reverse();
  }
  for(i = 0; i < e - b; i++){
   /https://img.qb5200.com/download-x/document.write("<br/>");
   /https://img.qb5200.com/download-x/document.write(array[i]);
   /https://img.qb5200.com/download-x/document.write("<br/>");
   /https://img.qb5200.com/download-x/document.write(t[i]._obj);
   /https://img.qb5200.com/download-x/document.write("<br/>");
   /https://img.qb5200.com/download-x/document.write(t[i]._obj == array[b+i]);
   array[b+i] = t[i]._obj;
  }
  /https://img.qb5200.com/download-x/document.write("排序后====================<br/>")
  //print(array);
  var begin, end;
  if(col.length > 1){
   col.shift();
   ord.shift();
   begin = b;
   for(i = b; i < e - b - 1; i++){
    if( array[i][curCol] != array[i+1][curCol] ){
     end = i+1;
     /https://img.qb5200.com/download-x/document.write("begin="+begin+"end="+end+"<br/>");
     mySort(array,col,ord,begin,end);
     begin = end;
    }
   }
   if(begin != e){
    mySort(array,col,ord,begin,e);
   }
  }

  /https://img.qb5200.com/download-x/document.write("<br/>");
  /https://img.qb5200.com/download-x/document.write("排序后"+array);
}
function print(data){
  for(var i = 0; i < data.length; i++){
   document.write(data[i]+"<br/>");
  }
}
document.write("排序前====================<br/>");
print(data);
var b = new Date().getTime();;
mySort(data, [0,1,2],['asc','des','asc'],0,data.length);
document.write("用时"+(new Date().getTime() - b));
document.write("排序后====================<br/>")
print(data);
//-->
</script>
</head>

加载全部内容