视图（View）：用户界面。
控制器（Controller）：业务逻辑
模型（Model）：数据保存

View 传送指令到 Controller
Controller 完成业务逻辑后，要求 Model 改变状态
Model 将新的数据发送到 View，用户得到反馈

1. 用户可以向 View 发送指令（DOM 事件），再由 View 直接要求 Model 改变状态。

2. 用户也可以直接向 Controller 发送指令（改变 URL 触发 hashChange 事件），再由 Controller 发送给 View。

3. Controller 非常薄，只起到路由的作用，而 View 非常厚，业务逻辑都部署在 View。所以，Backbone 索性取消了 Controller，只保留一个 Router（路由器） 。

1. 各部分之间的通信，都是双向的。

2. View 与 Model 不发生联系，都通过 Presenter 传递。

3. View 非常薄，不部署任何业务逻辑，称为"被动视图"（Passive View），即没有任何主动性，而 Presenter非常厚，所有逻辑都部署在那里。

Today on Twitter I saw a tweet related to the ability to remember the Redis port number. There is a trick, the Redis port number, 6379, is MERZ at the phone keyboard. 

Is it a coincidence that it sounds not random enough? Actually not ;) I selected 6379 because of MERZ, and not the other way around. 

Everything started with Alessia Merz, an Italian Showgirl (make sure to check some (not safe for work) photo as well). 

I and my friends are used to create our own slang, that is evolving since... 20 or 25 years. Well one adjective that we use consistently since 10 years is "merz", but the meaning of the word changed so much in the course of the time. 

Initially it started because we were really delighted by the stupidity of the sentences that the showgirl was able to state in the italian TV. So we started using "MERZ" when something was... stupid. "Hey, that's merz!". And so forth. But then with some time the meaning shifted in something stupid as pointless, but with very technical value, or with an impressive amount of skills and patience and work involved, but still... stupid. 

For instance creating a 3D map of your hometown by sampling the points with a GPS and a broken car going around for the whole night, or analyzing tons of lottery data searching for biases, perfectly knowing that we'll never spend a single penny in a lottery ticket anyway, and so forth. "Merz" basically means... hack value, but is also referred to people not just things, people that act in a funny way just for hack value, or to be fun, and so forth. 

So when I had to pick a port number for Redis I had no troubles, whatever number MERZ was at the phone, it was the Redis port number.

//购物车控制显示

$("#head_car").hover(function(){

    $(this).css("background", "#FBFEE9");

    $(".head_car_text").css("color", "#ff6700");

    $("#car_content").css({"width":"300px"}).animate({

        height:"100px"

    },400).finish();

},function(){

    $(this).css("background", "#424242");

    $(".head_car_text").css("color", "#b0b0b0");

    $("#car_content").css({"width":"300px"}).animate({

        height:"0px"

    },400);

})

//导航栏控制显示

$(".menu_li").hover(function(){

    $("#menu_content_bg").css("border","1px solid #D0D0D0");

    $(this).css("color","#ff6700");

    $("#"+$(this).attr("control")).show();

    $("#menu_content_bg").height(230);

},function(){

    $("#"+$(this).attr("control")).hide();

   $(this).css("color"," #424242");

    $("#menu_content_bg").height(0);

    $("#menu_content_bg").css("border","0px solid #D0D0D0");

})

//搜索框失去和获取焦点border颜色改变

$("#find_input").focus(function(){

    $("#find_wrap").css("border","1px solid #ff6700");

    $("#find_but").css("border-left","1px solid #ff6700");

})

$("#find_input").blur(function(){

    $("#find_wrap").css("border","1px solid #F0F0F0");

    $("#find_but").css("border-left","1px solid #F0F0F0");

})

//搜索按钮的背景颜色改变

$("#find_but").hover(function(){

    $(this).css({"background":"#ff6700",color:"#fff"});

},function(){

    $(this).css({"background":"#fff",color:"#424242"});

})

//菜单栏的显示

$("#banner_menu_wrap").children().hover(function(){

    $(this).css("background","#ff6700");

    $(this).children(".banner_menu_content").css("border","1px solid #F0F0F0").show();

},function(){

    $(this).css("background","none");

    $(this).children(".banner_menu_content").css("border","0px solid #F0F0F0").hide();

})

$.ajax({

        url: '/Home/AjaxGetData',            

        success: function (data) {

            alert(data);

        },

        error: function (jqXHR, textStatus, errorThrown) {

            /*错误信息处理*/

        }

    });

• readyState :当前状态,0-未初始化，1-正在载入，2-已经载入，3-数据进行交互，4-完成。
• status  ：返回的HTTP状态码，比如常见的404,500等错误代码。
• statusText ：对应状态码的错误信息，比如404错误信息是not found,500是Internal Server Error。
• responseText ：服务器响应返回的文本信息

$.ajax({

        url: '/AJAX请求的URL',            

        success: function (data) {

            alert(data);

        },

        error: function (jqXHR, textStatus, errorThrown) {

            /*弹出jqXHR对象的信息*/

            alert(jqXHR.responseText);

            alert(jqXHR.status);

            alert(jqXHR.readyState);

            alert(jqXHR.statusText);

            /*弹出其他两个参数的信息*/

            alert(textStatus);

            alert(errorThrown);

        }

    });

> select date, description from table_name order by month(date),dayofmonth(date);

> select ip from table_name order by inet_aton(ip);

> select name from table_name order by if(name='lulu',0,1),name ;

> select name from table_name order by field(name,'lulu','xixi','baba','mama');

> select name from table_name order by cast(name as char);

alter table table_name modify name enum('lulu','xixi','mama','baba');

> select m_str from table_name

order by substring_index(substring_index(m_str,'-',2),'-',-1);