how to delegate in workday

JS Event Delegate

. getElementById ("UL");varOLi = Oul.getelementsbytagname ("Li")varOBTN =Document. getElementById ("Input");varInow =4;Oul.onmouseover= function (EV) {varEV = EV | | window.event; Event source, regardless of the event, as long as the element you are manipulating is the source of the eventvar Target= Ev.targe | | Ev.srcelement;if (EV.Target. nodename.tolocalelowercase () = ="Li"){Ev.Target.style.background="Red"}}Oul.onmouseout= function (EV) {varEV = EV | | window.event;var Target= Ev.targe | |

Copy Code code as follows: /** * Delegate Mode sample * * @create_date: 2010-01-04 */ Class PlayList { var $_songs = array (); var $_object = null; function PlayList ($type) { $object = $type. " Playlistdelegation "; $this->_object = new $object (); } function Addsong ($location, $title) { $this->_songs[] = Array ("Location" => $location, "title" => $title); } function Getplaylist () { return $this->_object->getplaylist ($thi

Copy CodeThe code is as follows: /** * Delegate Mode sample * * @create_date: 2010-01-04 */ Class PlayList { var $_songs = array (); var $_object = null; function PlayList ($type) { $object = $type. " Playlistdelegation "; $this->_object = new $object (); } function Addsong ($location, $title) { $this->_songs[] = Array ("Location" => $location, "title" => $title); } function Getplaylist () { return $this->_object->getplaylist ($this->_songs); } } Clas

Event Delegate Closed Package When to apply closures var li = 5; function my () { var t = N; Console.log (LI); 5 } my (); Console.log (t); The defined function can directly visit global variables, but it is impossible to access local variables outside of the function. The closure comes to the definition: A closure is a function that is called outside the scope of the function declaration at Thef () The scope of the function dec

(obtain market information, produce what product), only need to tell the secretary to send me a market report or we do not produce an atom bomb to turn to produce a hydrogen bomb. Then the secretary according to the command of the leadership of the choice to find which employee, and then the information returned to the leadership of the staff. The three employees are transparent to the leader, and the leader does not know who is executing the order. 4. How to define and use And then the examp

Recommendation 36: Use a delegate declaration in the FCLThere are 3 types of delegate declarations in the FCL, namely: Action, Func, predicate. Especially after their generic versions come out, they have been able to meet most of the requirements of our actual coding process. Action means accepting 0 or more input parameters, executing a piece of code without any return value; Func means to acc

A delegate is a classOne method can be used as a parameter of another method.Declaration delegate: Delegate string delegate name (parameter list);A function that uses a delegate returns a value and the argument list is the same as the delegateUse

Problem description C #2.0 has an anonymous method, which saves us some maintenanceCodeYou do not need to think about the proper name for a method. in some FCL methods, a delegate parameter is required, such as control. invoke or control. begininvoke method: Public object invoke (delegate method); Public iasyncresult begininvoke (delegate method ); In this c

treated in different ways for different foods.When the food is = water, it is Swallowed directly without chewingWhen food = meat steamed stuffed bun, of course, to chew and then swallowWhen food is equal to chewing gum, chew onlyWhen the food is = fish, you need to spit out the fishbone carefully ......Obviously, you cannot predict all the situations in your class. In this case, you can define "mouth start to act" as a delegate, so that the specific

In the process of using C #, it is inevitable that multiple threads will be used. After using multiple threads, how threads interact with the interface is a headache. In fact, it is not just the interface. In general, we often need to obtain some thread information to determine the thread status. The better way is to use the delegate implementation. Let's look at the example:Note: In this example, the number of threads executed is displayed in real ti

Delegate: Delegate is a table? The method is passed as a parameter to other methods. A delegate is similar to a function pointer, but unlike a function pointer, a delegate is a. To an object, type-safe and insured. A delegate can lead to a static or an instance of a law.The

Before you study c#3.0, you should review the delegates and events first, as this will help you to understand some of the new features in c#3.0, such as Lambada expressions. Background In C, we can use function pointers to create callback functions, but there are some security problems with the callback function in C. Because it is recorded only in the memory address, there is no such other security information as the parameter type of the method, the number of parameters, the return value, an

C # proxy is actually similar to the function pointer in C ++. This article describes how to implement a C # proxy in three steps. The C # proxy is actually similar to the function pointer in C ++. Because C # does not have a pointer, you can use the proxy to complete some operations that were originally completed using the function pointer in C ++, for example, to pass the M method of Class A to the object of Class B, so that the object of Class B can call this m method. But compare

Android source code-embedded clock (3) Proxy/Delegate Application framework Application, android‑clockI. overview when a project requires shell, plug-in, or Hotfix, you can use the Proxy/Delegate Application framework. In normal mode, a program generally has only one Application entry, in the Proxy/Delegate mode, two applications are required. The Application of

Describes how to use the jquery event delegate (), jquerydelegate Let's take a look at how the delegate () method officially works. The delegate () method adds one or more event handlers to the specified element (a child element of the selected element, it also specifies the function that runs when these events occur. The event handler using the

[Guide]The differences between BIND (), live (), and delegate () methods are not very obvious. Figuring out these differences is very helpful for writing the summary code and preventing the emergence of bugs in our applications. The jquery team released a new method calledThe differences between the BIND (),. Live (), and. Delegate () methods are not very obvious. Figuring out these differences is very help

. NET programming is one of the most frequently used elements. In either ASP. NET or Winfrom development, form load (load), Draw (paint), Initialize (init), etc."protected void Page_Load (object sender, EventArgs e)" This code believes that no one is unfamiliar with it. Be careful, you will find that very many of the event methods are with the "object sender, EventArgs e" two parameters. Is this very similar to the Commission?One, the Commission (some books are also referred to as delegation)Wha

The ininvoke and BeginInvoke traps are used to delegate asynchronous calls. This trap comes from a requirement that the data needs to be processed asynchronously in the background. After processing, the event that is triggered to be processed is probably written as follows: EmployeeCollection data = new EmployeeCollection();data.Loaded += data_Loaded;Action The code is quite simple, and the traps are also in it. Suppose DalHelper. fill (data) throws a

Tight coupling Once upon a time, in a strange land in the south, Peter was a worker, who was very diligent and he was always obedient to his boss. However, his boss is a mean person. He never trusts others and insists that he know his work progress at any time to prevent him from being lazy. But Peter didn't want his boss to stay in his office and stare at him, so he made a promise to the boss: anytime, as long as I make some progress in my work, I will let you know in time. Peter periodically u