JavaScript splice() 方法
阿新 • • 發佈:2018-10-23
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