发布于 2017-04-23 08:05:11 | 101 次阅读 | 评论: 0 | 来源: 网友投递
jQuery javascript框架
jQuery是一个兼容多浏览器的javascript框架,核心理念是write less,do more(写得更少,做得更多)。jQuery在2006年1月由美国人John Resig在纽约的barcamp发布,吸引了来自世界各地的众多JavaScript高手加入,由Dave Methvin率领团队进行开发。
$.map(arr,fn);
对数组中的每个元素调用fn函数逐个进行处理,fn函数将处理返回最后得到的一个新的数组
var arr = [9, 8, 7, 6, 5, 4, 3, 2, 1];
var newarr = $.map(arr, function(item) {return item*2 });
alert(newarr);
$.each(array,fn)对数组array每个元素调用fn函数进行处理,没有返回值
var arr = [9, 8, 7, 6, 5, 4, 3, 2, 1];
$.each(arr, function(key, value) { alert("key:" + key + "value:" + value); });
还可以省略function的参数,这个时候this可以得到遍历的当前元素的值
var arr = [9, 8, 7, 6, 5, 4, 3, 2, 1];
$.each(arr, function() { alert(this); });
<%@ WebHandler Language="C#" Class="Handler" %>
using System;
using System.Web;
using System.Web.Script.Serialization;
using System.Collections.Generic;
public class Handler : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
Person p1 = new Person { Age = "22", Name = "tom" };
Person p2 = new Person { Age = "23", Name = "jim" };
Person p3 = new Person { Age = "24", Name = "lilei" };
IList<Person> persons = new List<Person> {p1,p2,p3};
JavaScriptSerializer js = new JavaScriptSerializer();
string s= js.Serialize(persons);
context.Response.Write(s);
}
public class Person
{
public string Name { get; set; }
public string Age { get; set; }
}
public bool IsReusable {
get {
return false;
}
}
}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="../myjs/jquery-1.4.2.js" type="text/javascript"></script>
<script type ="text/javascript" >
$(function() {
$("p").text("这是p标签");
});
</script>
</head>
<body>
<p></p>
<p></p> <p></p> <p></p> <p></p>
<p></p>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="../myjs/jquery-1.4.2.js" type="text/javascript"></script>
<script type ="text/javascript" >
$(function() {
$("p").each(function() {
$(this).text("这是p标签");
});
});
</script>
</head>
<body>
<p></p>
<p></p> <p></p> <p></p> <p></p>
<p></p>
</body>
</html>