bound object

here summarize JS in a key--this.  the This of a function in JS does not point to the function itself or to a scope, but to the object. In a nutshell, which object calls the function, the this in the function points to the object. But there are more

Default bindings// global objects for default bindings function foo () { Console.log (this. A)}var a=2; foo (); // 2 // function foo () { ' use strict ' ; Console.log ( this .a)} var a=2;foo (); // typeerror:this is undefined //

First, the basicDefinition: A description of the database, table, and column-related information.When to use: use when you want to get information about a database.One "database meta-data-through DatabaseMetaDataDatabaseMetaData Dbmd =

】OneListenerListenerJava EE includes 13-door specifications in the course of the main learning servlet technology and JSP technologywhere The servlet specification consists of three technical points: Servlet Listener Filter1. What is a listener?A

What is this?This is bound at run time, not at the time of writing, and its context depends on the various conditions when the function is called. The binding of this and the position of the function declaration have no relation, only depends on how

Defined The Const keyword is scoped to the type of the variable. The value of a const-modified variable cannot be changed (it can no longer be assigned after initialization), for example:const int NUM1 = 1;NUM1 = 1; Errorconst indicates that

Typically, the data in the form can be extracted from the parameter list of the controller function by spring MVC's @requestparam annotations, but once the form data is too large, the parameter list becomes very long, The best solution is to

Flexibility to consider more aspects of the provision of a number of important configuration convenient in all types of environment to use, welcome to use children's shoes, the source is fully open. The development of this plug-in is due to the

Commonly used C # data-bound controls are: Repeater, DataList, GridView, DetailsView, and so on, here I take Repeater to simply explain the problem. The uses this property to specify the data source that is used to populate the Repeater control.

Target Use Emberjs to make a simple TODO application, to achieve an effect: by entering text in a text box, creating an agent item, the agent can select priority, and the completed items can be deleted. Ready to To complete this application, you

have been suffering from the lack of good nationality control can be used, so the time to write a nationality control, now share to everyone. Main function and interface introduction The nationality control mainly supports the Chinese and English

This is an important keyword in object-oriented languages, and understanding and mastering the use of this keyword is critical to the robustness and elegance of our code. And JavaScript this is different from Java, C # and other pure object-oriented

First, the reasons for writing Plug-ins Why want to write this plugin, think about it, boil down to a word: "lazy." Do not want to clearly two similar functions to write code, this should be tea to see the beauty of leisure time sloshing in this can

The overall understanding of Jndi: Jndi (Java naming and directory Interface) it provides a set of interfaces that use naming and directory services. It allows users to use naming and directory services. Just like JDBC. Jndi includes both the

1. What is closureClosure personal understanding is an anonymous function that provides local variables within an external access function 2. Why do you use closures?The closure definition has explained that we want to access local variables

1. How to obtain RequestDispatcherRequestDispatcher objects can be obtained from the request or web context, although two methods are slightly different. A request can take a relative path(that is, not starting with "/") as a parameter, and the Web

Naming and Directory OperationsOriginal address: https://docs.oracle.com/javase/tutorial/jndi/TOC.htmlYou can use Jndi for naming operations, including read and update operation namespaces. The following actions are described in this article: Find

Event delegation, also called an event delegate. is a common technique for binding events commonly used in JavaScript. As the name implies, "event Agent" is to delegate the original need to bind the event to the parent element, so that the parent

The above blog we have introduced the basic const, for this blog, first, what is a reference: A reference is a different name for the object, and a reference type refers to another type. How to define: To define a reference type by writing the

/upload/20080604194652471.swf Constructors Public Function Dot (x_:number = 0,y_:number = 0,_islisten:boolean = False) The first two parameters represent the initial position of the dot, and the third parameter indicates whether it is a powerful