举例讲解JavaScript中将数组元素转换为字符串的方法
程序员文章站
2023-11-25 11:13:16
首先来看一下从一个数组中选择元素的方法slice()：
源代码:
首先来看一下从一个数组中选择元素的方法slice()：
源代码:
<!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>
测试结果:
orange,lemon
我们可以用数组的元素组成字符串，相关的join()方法使用例子：
源代码:
<!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>
测试结果：
banana,orange,apple,mango
直接转换数组到字符串则可以用tostring()方法：
源代码:
<!doctype html>
<html>
<body>
<p id="demo">点击按钮将数组转为字符串并返回。</p>
<button onclick="myfunction()">点我</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>
测试结果:
banana,orange,apple,mango