在数组的开头添加新元素 - unshift()
源代码:
<!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>
测试结果:
Lemon,Pineapple,Banana,Orange,Apple,Mango
在数组的第2位置添加一个元素 - splice()
源代码:
<!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>
测试结果:
Banana,Orange,Lemon,Kiwi,Apple,Mango
数组的末尾添加新的元素 - push()
源代码:
<!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>
测试结果:
Banana,Orange,Apple,Mango,Kiwi
详解JavaScript编程中的数组结构
数组对象的作用是：使用单独的变量名来存储一系列的值。创建数组,为其赋值：实例varmycars=newArray();mycars[0]="Saab";mycars[1]="Volvo";mycars[2]="BMW";什么是数组
javascript学习笔记整理（概述、变量、数据类型简介）
A.概述1.输出工具：document.write()---可以是htmlalert()---字符串prompt(text,defaultText)text---可选。要在对话框中显示的纯文本（而不是HTML格式的文本）。defaultText
举例讲解JavaScript中将数组元素转换为字符串的方法
首先来看一下从一个数组中选择元素的方法slice()：源代码:!DOCTYPEhtmlhtmlbodypid="demo"Clickthebuttontoextractthesecondandthethirdelementsfromthearray./pbuttononclick="myFunction()