es3 application

It's similar to the following:Code: Reference code: VaR o = {test: function () {alert ('origin') }}; O. test (O. test = function () {alert ('changed ');}); In this Code, we intuitively think that printing the origin is reasonable. At least I personally think so. But. chrome17-and IE8-both print changed. While firefox0.8 +, safai3 +, opera9.2 +, and ie9 + both print origin. The root cause of this problem can be found by looking at ES3 a

The demo is in the hand. You have to try it out. First, change the default service to webserver and add the database configuration. Create a database. GitHub contains related content.Create Table 'user _ List' ('userid' int (11) not null auto_increment, 'account' varchar (45) not null, 'Password' varchar (45) not null, 'session 'varchar (45) default null, 'addtime' int (11) not null, primary key ('userid '), unique key 'userid _ unique '('userid'), unique key 'account _ unique' ('account')

Center: instanceof "I answered wrong"function return Newinstanceof F;constructor function f () {Return f;//Returns a value of F, the scope chain looks up, can find f=>function f () {return F;} because F is not a base type, it returns F.}So the result of the new F () call is the F function itself. So now the question becomes whether F instanceof F is true or false.function A () {} is an instance of a function, and the A.prototype property is not found on the prototype chain of a, so instanceof

Recently in the Nginx module configuration, and then exposed to some type definition types For example: image/jpegimage/pngtext/plaintext/javascripttext/css;application/xmlapplication/x-javascript It is not clear why different files need different types of distinction, and then go to Baidu to find the following general information: Content-type: Defines how the user's browser or related device Displays the data that will be loaded, or how to hand

Oracle442 application scenarios ---------- basic application scenarios and application scenarios /// // Basic knowledge ////////////////// Application Scenario 178: the simplest select statement SELECT * FROM Employees; Use Case 179: Specify the column to be queried COL EMP_NAME FORMAT A20Col sex format A10Col title

Security needs to be thoroughly understood and mastered, both in development and during interviews or technical discussions. GoalThe goal of this tutorial is to give you an idea of how you should protect your own built WEB applications. Explains how to defend against the most common security threats: SQL injection, manipulating GET and POST variables, buffer overflow attacks, cross-site scripting attacks, data manipulation within the browser, and remote form submission.Quick Introduction to Sec

Application and Research of AOP technology -- simple application of AOP and Application of aop technology -- aop In order to better understand AOP practices and reflect the advantages of AOP, we will always compare OOP with AOP in the following sections. In the end, we will summarize the advantages of AOP compared with OOP, the disadvantages of AOP, and the gener

VC "because the application configuration is incorrect, the application cannot be started, and re-installing the application may correct this problem" SOLUTION One of the reasons for this problem: the Windows Installer service on your computer is not enabled.The solution is to open the control panel → manage → service, enable the Windows Installer service, set i

　 　 　 　 　 　 Web application architecture 　 　 　 　 WebSphere Application Server application practices 　 　 　 　 　 　 　 WebSphere Application Server (WAS) is the flagship product of the IBM WebSphere product series. It is applicable to large ent

Recently, a friend asked me how to add a domain name email address, so I sorted it out and posted it. It is very specific. You can compare it directly. What is a domain name mailbox? Suppose you have your own domain name. By setting the domain name DNS, you can create a mailbox with your own domain name as the mailbox suffix. Google, QQ, and Netease now provide similar applications. Google's domain name mailbox is part of Google's enterprise application