agile software development principles patterns and practices

object in an interface, can execute different objects method, equal to the director said a boot, the rest of the people can do their own thing.Here we assume that the object has an Execute method, if the object does not have a common method, it can also add one to the object, if the object is created by new way on the prototype chain, if not through new, directly add1 //The New Way2Menubar=NewMenubar ();3Menubar.prototype.execute=function(){4 This. Refresh (); The methods that really need

processing methods at the data access layer and completes such as transaction processing. The business logic proxy layer component generates the corresponding business proxy code based on the business layer components to complete the function of transferring requests from the system interface layer to the real business logic layer. UI development Interface Layer Development is a very important part i

Design principles (7 types): There are so many principles that guide us in the design and development of our programs because there is an unknown change in our program. In order to embrace this unknown change at the lowest cost, our predecessors summed up so many principles. ① Yagni PrinciplesYou aren ' t gonna need it

Recently, I've seen Infoq's article on the practice and application of lean kanban in software development, and agile software development draws on many of the ideas of TPs lean production, although the concept of kanban is not fully mentioned, but Kanban is necessary in the

consistent. Public classBubbleDemo2 { Public Static voidaction () {integer[] array=Newinteger[]{1,2,3,5,6,8,10,0,2,3 }; GenericsorthandleNewGenericsorthandle(); Bubblesorter Bubblesorter=NewBubblesorter (Intbublesorter); Bubblesorter.sort (array); for(inti=0;i) {tracelog.i (array[i].tostring ()); } }}Or that sentence, the use of design patterns, depending on the circumstances, if the requirements, the environment changes, there may

I have always been interested in some methods and principles of Agile Software Development and have many ideas. However, because I have little work to use and no one can communicate with each other, all those ideas only exist at the theoretical level, I hope to share these theoretical knowledge with you in your work or

the Custom Level, enable "initialize and execute scripts for ActiveX controls that are not marked as secure scripts. So far, activexform's IE security settings have been completed. If you need to add one point, the big brother and sister of the win7 operating system choose to run as administrator when starting IE. Webform application subordinates Agileeas. NET provides a webform running container for pure webform. developers can modifyCodeAnd style. The code structure is as follows:

the Addevent function is entered:1 varAddevent =function(Elem, type, handler) {2 if(window.addeventlistener) {3Addevent =function(Elem, type, handler) {//the difference between this and the previous scenario is that it rewrites itself.4Elem.addeventlistener (type, Handler,false );5 }6}Else if(window.attachevent) {7Addevent =function(Elem, type, handler) {8Elem.attachevent (' on ' +type, handler);9 }Ten } OneAddevent (Elem, type, handler);//This will only be performed the

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

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

); 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

Introduced: For Agile Software Development, it is important to keep track of the progress of the project at all times, as you can keep abreast of the health of the team and deal with unexpected situations in a timely manner to ensure that our projects are delivered on time after each iteration. Implementation mode: The best tool to see the project progress is

=function(){ This. Receiver.add ();};varDelsubmenucommand=function(receiver) { This. receiver=receiver;};D ElSubMenuCommand.prototype.execute=function{ This. Receiver.del ();}Finally, the command receiver is passed into the commands object, and the order object is bound to the buttonvar refreshmenubarcommand=New Refreshmenubarcommand (MenuBar); var addsubmenucommand=New Addsubmenucommand (submenu); var delsubmenucommand=New Delsubmenucommand (submenu); SetCommand (button1, Refreshmenu

; One } A - varcalculate =function(Func, salary) {//Higher order functions - returnfunc (salary); the }; - -Calculate (S, 20000);//Output: 80000 -Calculate (A, 10000);//Output: 30000Or use objects so that policies can relate to each other:1 varLv = {2"S":function(Salary) {3 returnSalary * 4;4 },5"A":function(Salary) {6 returnSalary * 3;7 },8"B":function(Salary) {9 returnSalary * 2;Ten } One }; A -

prototype programming paradigm If the object cannot respond to a request, it will delegate the request to its own prototype object.prototype , which is an empty object, every object we encounter in JavaScript is actually cloned from it. object.prototype is their prototype. Although we often use new to instantiate a function, in JavaScript, when you use the new operator to invoke a function, you actually clone the object.prototype object First, and then pe

the complexity of some calls, but they also enhance the flexibility of iterators, and we can manually control the process or order of iterations.4. The iterator pattern can not only iterate over algebraic groups, but also iterate over the objects of some class arrays.In JavaScript, the for-in statement can be used to iterate over the properties of an ordinary literal object.5. Reverse Iterator6. Abort iterator7. Application examples8. SummaryThe iterator pattern is a relatively simple pattern t

and polymorphism.The policy model provides perfect support for the open-closed principle, encapsulating the algorithms in separate startegy, making them easy to switch, easy to understand, and easy to extend.Algorithms in the policy model can also be reused elsewhere in the system, avoiding many repetitive copy-pasting efforts.Using composition and delegation in the policy model allows the context to have the ability to execute algorithms, which is a more portable alternative to inheritance.In

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,

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

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