mpls design best practices

iterator: Sets the callback function to the callback to return false when it jumps out of the loopExamples of applications for iterators: When file uploads are available in many ways, avoid using conditional selection statements to choose how to uploadThe solution might be: Each upload method is written as a function, the function returns the Upload object, and returns False if it is an incompatible upload method. Iterate through all the functions of the upload method as an array,

varProxysynchronousfile = (function(){7 //array of Cache IDs8 varCache = [];9 //A variable that marks whether the inertia time endsTen varTimeisnotup =NULL; One A return function(ID) { - Cache.push (ID); - if(timeisnotup) { the return; -}Else{ -Timeisnotup = SetTimeout (function(){ -Synchronousfile (Cache.join (', ') ) ); + cleartimeout (timeisnotup); -Timeisnotup =NULL; +Cache.length = 0; A}, 2000 ); at }; - } - })(); - - //Customer Act

Web-side when a large number of DOM data insertion, if a one-time insertion of thousands of data, the browser will be unable to appear in the case of the death of Kaka, the code is as follows:vararr = []; for(vari = 0; i ) {Arr.push (i);}varLoadData =function(data) { for(vari = 0, L = data.length; I ){ varElem = document.createelement (' div '); Div.innerhtml=i; Document.body.appendChild (DIV); }};loaddata (arr);//Create a Timechunk () function to insert the DOM in batchesvarTimechunk

interface object, everyone is this interface object, but a layer of layers, constantly called.The execution process is actually a depth-first search .some notable places to watchThe combined pattern is not a parent-child relationship, but rather a delegate relationship.Scenario: The combination mode is only appropriate when dealing with each leaf object in the list in a consistent manner.SummaryCombining patterns allows us to create the structure of objects in a tree-like way, and we can apply

addevent wraps the correct logical function, the code is as followsBut there is still one drawback to this function, assuming that we have not used the Addevent function from beginning to end.The third option is to use the lazy loading scheme, the first time you enter the conditional branch, the function will be overridden inside the function, the rewritten function is what we expect the Addevent function, the next time we enter the Addevent function, Addevent does not exist those branch judgme

); for(vari=0,file,files= this. files;file=files[i++]; ) {file.scan (); } }; Folder.prototype.remove=function(){ if(! this. parent) {//the root node or the free node outside the tree return; } for(varFiles = this. parent.files,l = files.length;l>=0; l--){ varFile =files[l]; if(file = = this) {files.splice (l,1); } } }; varFile =function(name) { this. Name =name; this. Parent =NULL; }; File.prototype.add=function(){ Throw

JavaScript design patterns and development practices-JavaScript Polymorphism "Polymorphism" is derived from polymorphism in the Greek text. The split is poly (plural) + morph (morphology) + ism, which can be literally understood as the plural form. The actual meaning of polymorphism is: the same operation acts on different objects and can produce different interpretations and different execution results. In

3.5 has been integrated with entityframework. Users who use. Net 4.0 do not need to download or install additional plug-ins. Compared with LINQ to SQL, entityframework transfers the focus of system design from database-driven to model/domain-driven. Domain-driven design (DDD) Domain-driven design is neither a technology nor a methodology. It is a way of thin

developers, never care about these behaviors. The code is as follows:JavaScript var address = (function// address module function(obj) { Address.refresh (obj); }); return { function(avatar) { console.log (' Refresh receipt address List ');} } ;}) ();Advantages and Disadvantages Supports simple broadcast communication and automatically notifies all subscribed objects; After page loading publishers can easily have a dynamic association wi

Unit testing best Practices for domain-driven design (ii)All along, I tried to find an effective unit test pattern, so that "unit testing" really can be popular in the team, so that unit testing is no longer a formality, but to make unit testing a way to improve the quality of the code.This article describes a scenario for implementing unit tests for domain-driven projects implemented in EF Code first mode.

Atitit. log system principles and design and best practices. 1. log system is an indispensable unit test, tracking debugging tool 1 2. The log system framework should generally include the following basic features 1 1. The output log has its own category. 2 2. logs are divided into different levels according to certain standards. 2 3. multithreading is supported. 2 4. Stability. 2 3. An Ideal log Mode 2 4.

class.PackagingThe purpose of encapsulation is to hide information, encapsulation should be considered "any form of encapsulation", that is, encapsulation is not only hidden data, but also the hidden implementation details, design details and types of hidden objects.Prototype modeIn JavaScript, each object is cloned from the Object.prototype object, so that we can only get a single inheritance relationship, that is, each object inherits from the Obje

data columns cannot be defined in frequently queried tables, which is based on performance considerations. Separate the data into separate tables. Then use the reference to point to the data, which is the associated query. 19, must use the database design third normal form normalization request, optimizes the performance. Not using a paradigm will result in too much duplication of data in too many tables, overuse of the paradigm will cause too many t

Web APIs have become more and more popular in recent years, and the simplicity of API design has become particularly important in multi-backend system interaction applications. In general, RESTful APIs are used as our Web API. This article describes some of the best practices for designing simple RESTful APIs.A noun used instead of a verbUsing nouns to define interfaces, verbs should not be used: /

Database design is one of the key points of the entire program. In order to support the relevant program running, the best database design is often not achieved overnight. It is a complicated process that can only be repeatedly explored and gradually refined, it is also a process of planning data objects in a structured database and the relationship between these data objects. The following provides 20 best

Introduction: Database design is one of the key points of the entire program. In order to support the relevant program running, the best database design is often not achieved overnight and can only be repeatedly explored and gradually improved. This is a complicated process, it is also a process of planning data objects in a structured database and the relationship between these data objects. The following

Database design is one of the key points of the whole program, in order to support the relevant program operation, the best database design is often impossible, can only repeatedly explore and gradually refinement, this is a complex process, but also the planning and structured database data objects and the relationship between these data objects process. Here are 20 database

Today we will mainly talk about the DB2 Performance Tuning design and configuration of your database. There are many database design and configuration options that can affect the query performance. For more suggestions on Database Design, see the "Planning your Physical Database Design" Best

system extensibility through package Changes. In the traditional object-oriented language, a program that uses a template method pattern, the class of the subclass and the order of execution are constant, so we abstract this part of the logic into the parent class template Method. The method of how the subclass is implemented is mutable, so we encapsulate the logic of this part of the change into Subclasses. By adding new subclasses, We can add new functionality to the system, without altering

is not perfect Design up from the mobile side @media All and (min-width:320px) {}@media All and (min-width:768px){} To get Better browser support, And can reduce the complexity of CSS files 5. Create a core experience6. Determine the breakpointTraditional approach: use some fixed standard widths: 320px (iphone and some other devices), 768px (ipad) and 1024pxThe problem is that devices that are between these