push方法在数组尾部添加数据,unshift方法在数组头部添加数据。
join使用方法为 a.join("任意字符");
a.reverse();
代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>数组方法之增加和删除</title>
<style type="text/css">
*{margin:0}
#show{
width:200px;
height:200px;
margin:0 auto;
color:white;
background:#2c2c2c;
text-align:center
}
</style>
<script type="text/javascript">
var a = [22,4,111,33];
/*a.push("<span style='color:red'>a</span>");
a.pop();
a.unshift("<span style='color:yellow'>b</span>");*/
//a.reverse();
document.write("<div id='show'>");
document.write(a.concat("www")+"<br/>");
//document.write(a.join("*")+"<br/>");
document.write(a);
document.write("</div>");
</script>
</head>
<body>
</body>
</html>
代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>数组方法</title>
<style type="text/css">
*{margin:0}
#show{
width:200px;
height:200px;
margin:0 auto;
color:white;
background:#2c2c2c;
text-align:center
}
</style>
<script type="text/javascript">
//var a = [33,4,111,22];
//a.slice(2);
var a = [1,2,3,4,5,6,7,8,9];
document.write("<div id='show'>");
//document.write("结果为:"+a.slice(1,3)+"<br/>");
document.write("结果为:"+a.splice(4,2,"a")+"<br/>");
document.write(a.toString());
document.write("</div>");
</script>
</head>
<body>
</body>
</html>