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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