js对数组中的数字从小到大排序实现代码_javascript技巧

例子 1
In this example we will create an array and sort it alphabetically:

<script type="text/javascript"> var arr = new Array(6) arr[0] = "Jani" arr[1] = "Hege" arr[2] = "Stale" arr[3] = "Kai Jim" arr[4] = "Borge" arr[5] = "Tove" document.write(arr + "<br>") document.write(arr.sort()) </script>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]

输出：

Jani,Hege,Stale,Kai Jim,Borge,Tove
Borge,Hege,Jani,Kai Jim,Stale,Tove例子 2
In this example we will create an array and sort it alphabetically:

<script type="text/javascript"> var arr = new Array(6) arr[0] = "10" arr[1] = "5" arr[2] = "40" arr[3] = "25" arr[4] = "1000" arr[5] = "1" document.write(arr + "<br>") document.write(arr.sort()) </script>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]

输出：

10,5,40,25,1000,1
1,10,1000,25,40,5请注意，上面的代码没有按照数值的大小对数字进行排序，要实现这一点，就必须使用一个排序函数：

<script type="text/javascript"> function sortNumber(a,b) { return a - b } var arr = new Array(6) arr[0] = "10" arr[1] = "5" arr[2] = "40" arr[3] = "25" arr[4] = "1000" arr[5] = "1" document.write(arr + "<br>") document.write(arr.sort(sortNumber)) </script>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]

输出：

10,5,40,25,1000,1
1,5,10,25,40,1000