js對數組中的數字從小到大排序

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>
輸出：

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>
輸出：

10,5,40,25,1000,1
1,10,1000,25,40,5
請注意，上面的代碼沒有按照數值的大小對數字進行排序，要實現這一點，就必須使用一個排序函數：

<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>
輸出：

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