首先來看一下從一個數組中選擇元素的方法slice()：
源代碼:
<!DOCTYPE html>
<html>
<body>
<p id="demo">Click the button to extract the second and the third elements from the array.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction()
{
var fruits = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
var citrus = fruits.slice(1,3);
var x=document.getElementById("demo");
x.innerHTML=citrus;
}
</script>
</body>
</html>
測試結果:
Orange,Lemon
我們可以用數組的元素組成字符串，相關的join()方法使用例子：
源代碼:
<!DOCTYPE html>
<html>
<body>
<p id="demo">Click the button to join the array elements into a string.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction()
{
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var x=document.getElementById("demo");
x.innerHTML=fruits.join();
}
</script>
</body>
</html>
測試結果：
Banana,Orange,Apple,Mango
直接轉換數組到字符串則可以用toString()方法：
源代碼:
<!DOCTYPE html>
<html>
<body>
<p id="demo">點擊按鈕將數組轉為字符串並返回。</p>
<button onclick="myFunction()">點我</button>
<script>
function myFunction()
{
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var str = fruits.toString();
var x=document.getElementById("demo");
x.innerHTML= str;
}
</script>
</body>
</html>
測試結果:
Banana,Orange,Apple,Mango