DIV CSS 佈局教程網

 DIV+CSS佈局教程網 >> 網頁腳本 >> JavaScript入門知識 >> 關於JavaScript >> 向JavaScript的數組中添加元素的方法小結
向JavaScript的數組中添加元素的方法小結
編輯:關於JavaScript     

在數組的開頭添加新元素 - unshift()
源代碼:

<!DOCTYPE html>
<html>
<body>

<p id="demo">Click the button to add elements to the array.</p>

<button onclick="myFunction()">Try it</button>

<script>
function myFunction()
{
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.unshift("Lemon","Pineapple");
var x=document.getElementById("demo");
x.innerHTML=fruits;
}
</script>

<p><b>Note:</b> The unshift() method does not work properly in Internet Explorer 8 and earlier, the values will be inserted, but the return value will be <em>undefined</em>.</p>

</body>
</html>  

測試結果:

Lemon,Pineapple,Banana,Orange,Apple,Mango


在數組的第2位置添加一個元素 - splice()
源代碼:

<!DOCTYPE html>
<html>
<body>
​
<p id="demo">Click the button to add elements to the array.</p>
​
<button onclick="myFunction()">Try it</button>
​
<script>
function myFunction()
{
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2,0,"Lemon","Kiwi");
var x=document.getElementById("demo");
x.innerHTML=fruits;
}
</script>
​
</body>
</html>     

測試結果:

Banana,Orange,Lemon,Kiwi,Apple,Mango


數組的末尾添加新的元素 - push()
源代碼:

<!DOCTYPE html>
<html>
<body>
​
<p id="demo">Click the button to add a new element to the array.</p>
​
<button onclick="myFunction()">Try it</button>
​
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
​
function myFunction()
{
fruits.push("Kiwi")
var x=document.getElementById("demo");
x.innerHTML=fruits;
}
</script>
​
</body>
</html>   

測試結果:

Banana,Orange,Apple,Mango,Kiwi

XML學習教程| jQuery入門知識| AJAX入門| Dreamweaver教程| Fireworks入門知識| SEO技巧| SEO優化集錦|
Copyright © DIV+CSS佈局教程網 All Rights Reserved