vlan design example

The last time I wrote a system architecture based on MVC pattern and command mode, I also made a simple example. After writing what I want to write, I want to use a specific project to concatenate most of the design pattern ideas. What I want to say today is the single piece mode. First of all, a simple description of what is a single piece mode, also known as Singleton mode, to achieve a single instance

other non-primary key attributes depend on the primary key, then this property is indirectly dependent on the primary key, which is known as passing dependent on the primary property. Popular understanding: A table with up to 2 layers of the same type information eg: Dad table, not meet the third paradigm Father Son Daughter Little Bear of the daughter Daughter's SpongeBob SquarePants Change to dad informatio

Singleton design pattern: Resolves a class that only has one object in memory.(1) Want to ensure that the object is unique.A) to avoid excessive creation of such objects by other programs. Prevent other programs from setting up this type of object firstb) Also for other programs to have access to the class object, in this class, you can customize an object.c) To facilitate the access of other programs to custom objects, you can provide some external a

is relatively close, add a white border, strong foreground color in the background of the distinction, enhance the visual enhancement effect. Conclusion: Background color and the brightness of the foreground color is close, the color gives the person the visual appearance to be more stuffy, adds the small white division to make the color guide primary and secondary block surface more trenchant, the page is sprightly many. This kind of color combination is used for feminine the

Article Description: website Interaction Design Example: the correct guidance to win the loyalty of users. Web site, with a strong contrast to the main color or texture of a very strong button to attract users to operate, thereby facilitating the transaction, or browsing relevant important information. Correct guidance, in line with the principle of human-machine engineering, optimize the user

Single case mode The following is an example of using a single example pattern in Java public class businessbll{ private static BUSINESSBLL BUSSINESSBLL = null; private context; Public Businessbll { This.context = context; } public static BUSINESSBLL GETBUSINESSBLL { if (BUSINESSBLL = = null) { BUSINESSBLL = new BUSINESSBLL (cont

When writing a program, we often run into scenarios where we plug a bunch of algorithms into the same piece of code and then use IF-ELSE or switch-case conditional statements to determine which algorithm to use. These algorithms may be a bunch of similar class functions or methods to solve related problems. For example, a routine that validates the input data itself can be any data type (such as NSString, cgfloat, etc.), and each data type requires a

two variables, String A; String b; The JVM may load a or B first. In the same vein, instance = new Singleton (), the instance may be set to non-empty before calling the Singleton constructor. This is a lot of people will have doubts, said has not yet instantiated a singleton object, then instance how to become non-empty it? What is the value of it now? To understand this problem, you need to understand instance = new Singleton (); How is this sentence executed, the following with a pseudo-code

This article mainly introduces the example explanation of the factory pattern in JavaScript design pattern, the friend who need can refer to the following JavaScript Factory Way original nbsp; because the properties of an object can be dynamically defined after the object is created, this code, similar to the following, is written in JavaScript when it was first introduced: var ocar = new Object; Ocar.col

Appearance mode (façade mode) is a relatively simple and ubiquitous pattern. The appearance mode provides a high-level interface that makes it easier to invoke the client or subsystem. With a simple code that says: Copy Code code as follows: var getName = function () { Return "Svenzeng" } var getsex = function () { Return ' Mans ' } If you need to call the GetName and Getsex functions separately. That can be invoked with a higher-level interface GetUserInfo.

" static Let shared = Swiftsingleton () } var single1 = swiftsingleton.shared var single2 = swiftsingleton.shared Single2.name = "2" println ("------->\ (single1.name)") println ("------->\ (single2.name)") Copy CodeThe printing results are as follows: ------->1 ------->2 Program ended with exit code:0 Copy CodeAs can be seen from the above, through the implementation of the struct, we can not guarantee that there is only

){ Try{methods[i] (); }Catch(e) {Continue;//back to where the loop started. } This. Createxhrobject=methods[i] ();//It is important to ensure that the full-loop array is not used for every request returnMethods[i] (); } //If all is wrong then error Throw NewError ("Error"); } };The third step, the use of inspection(1) Instantiating an object var myhandler=New simplehandl

QQ Show process is a key process of QQ Show Mall, accounting for the most direct part of the income. Its optimization is an important reference for the follow-up mall process optimization. OK, now use TA to do an example, share the process optimization, interactive design analysis process. First of all, a general understanding of the process before the optimization. The first step: to trigger the user gift

system and user Analysis system, this set of things recorded a large number of user behavior, and in preference to recommend a lot of practice and improvement, can be said that the technology has been quite mature. This creates a very good condition for the watercress radio to provide highly targeted online listening. Moreover, the most important thing is that, compared to Last.fm and other similar products, watercress Radio has a greater space for expansion. Watercress is an infinite expansio

Article Introduction: CSS Web Design example: Travel Network tab to switch the first page. Last month's project ... There are many ways to switch tabs, and here's a piece of code that I personally like to use:For web standardization, this structure is very clear, when the picture does not show the same can know the text content, but also conducive to SEO. The background picture is divided into t