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JavaScript splice() 方法

art document geo 刪除 iam scrip var 一個 arr

參考:http://www.w3school.com.cn/jsref/jsref_splice.asp

例子 1

在本例中,我們將創建一個新數組,並向其添加一個元素:

<script type="text/javascript">

var arr = new Array(6)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
arr[3] = "James"
arr[4] = "Adrew"
arr[5] = "Martin"

document.write(arr + "<br />")
arr.splice(2,0,"William")
document.write(arr + "<br />") </script>

輸出:

George,John,Thomas,James,Adrew,Martin
George,John,William,Thomas,James,Adrew,Martin

例子 2

在本例中我們將刪除位於 index 2 的元素,並添加一個新元素來替代被刪除的元素:

<script type="text/javascript">

var arr = new Array(6)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
arr[3] = "James"
arr[4] = "Adrew"
arr[5] = "Martin"

document.write(arr + "<br />")
arr.splice(2,1,"William")
document.write(arr) </script>

輸出:

George,John,Thomas,James,Adrew,Martin
George,John,William,James,Adrew,Martin

例子 3

在本例中我們將刪除從 index 2 ("Thomas") 開始的三個元素,並添加一個新元素 ("William") 來替代被刪除的元素:

<script type="text/javascript">

var arr = new Array(6)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
arr[3] = "James"
arr[4] = "Adrew"
arr[5] = "Martin"

document.write(arr + "<br />")
arr.splice(2,3,"William")
document.write(arr) </script>

輸出:

George,John,Thomas,James,Adrew,Martin
George,John,William,Martin

JavaScript splice() 方法