js splice()方法

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splice() 方法向/從數組中添加/刪除項目，然後返回被刪除的項目。注釋：該方法會改變原始數組。

 

執行個體

例子 1在本例中，我們將建立一個新數組，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,MartinGeorge,John,William,Thomas,James,Adrew,Martin例子 2在本例中我們將刪除位元於 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,MartinGeorge,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,MartinGeorge,John,William,Martin

 

js splice()方法