举例讲解JavaScript中将数组元素转换为字符串的方法
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2023-01-01 20:15:15
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
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