如何在JavaScript中基于对象值对数组进行排序？

Question

我有一个对象结果集。它有以下记录

var resultset = [{0: "A", 1: "25.14", 2: "0,0,0,0,30.79,0,7.68,0,0,6.13,0,0"}, 
{0: "B", 1: "3.26", 2: "0,0,0,31,0,0,0,0,0,0,0,0"}, 
{0: "C", 1: "37.01", 2: "0,0,0,0,0,0,0,0,0,0,0,0"},  
{0: "D", 1: "1.18", 2: "0,0,0,9.63,0,0,0,0,0,0,0,0"},  
{0: "E", 1: "0.28", 2: "0,0,0,13.22,0,0,0,0,0,0,0,0"}]

我曾经根据值对这个对象进行排序，即使用下面的代码

对索引1进行排序

resultset.sort(compareSecondColumn);

function compareSecondColumn(a, b) {
    //alert("A Value -->"+a[1]);
    //alert("B Value -->"+b[1]);
    if (a[1] == b[1]) {

        return 0;
    }
    else {
        //alert(b[1]);
        return (a[1] > b[1]) ? -1 : 1;
        }
   }

但我无法根据索引1进行排序。

我的预期输出如下所示，根据索引1（37.01）进行排序

{0: "C", 1: "37.01", 2: "0,0,0,0,0,0,0,0,0,0,0,0"}  
{0: "A", 1: "25.14", 2: "0,0,0,0,30.79,0,7.68,0,0,6.13,0,0"} 
{0: "B", 1: "3.26", 2: "0,0,0,31,0,0,0,0,0,0,0,0"} 
{0: "D", 1: "1.18", 2: "0,0,0,9.63,0,0,0,0,0,0,0,0"}  
{0: "E", 1: "0.28", 2: "0,0,0,13.22,0,0,0,0,0,0,0,0"}

我尝试从下面的URL做一些对象排序机制。但是不会为我工作。

http://www.javascriptkit.com/javatutors/arraysort2.shtml

Sorting JavaScript Object by property value

Answer 1

你不能对字符串进行排序，只需解析为float然后比较

function compareSecondColumn(a, b) {
    var valueA = parseFloat(a[1]);
    var valueB = parseFloat(b[1]);
    if (valueA == valueB) {
        return 0;
    } else {
        return (valueA  > valueB) ? -1 : 1;
    }
}

Answer 2

您正试图在那里对字符串进行排序。

您应该解析该值，并按照

进行操作

resultset.sort(function(a, b){
  return parseFloat(b[1]) - parseFloat(a[1]);
});