agile software development principles patterns and practices

executed, which can also be done with a history list stack. Logging command logs and then repeating them is a good way to reverse an irreversible command.Command queueMacro command:A macro command is a collection of commands that can execute a batch of commands at a time by executing a macro command. varClosedoorcommand ={execute:function() {Console.log (Closed); } }; varOpenpccommand ={execute:function() {Console.log (' Turn on the computer '); } }; varOpenqqcommand ={execute:fu

, which is a bit around, for the following notationConsole.log (object.prototype= = =object.__proto__.__proto__ ); // true to see that the prototype object of object is the prototype of its prototypeWe have said that the prototype means cloning inheritance, that is, object around a circle to inherit its own prototype object, the prototype chain should be a chain, __proto__ connected to inherit the object, prototype to others, and object here a knot, this particularity shows its special statu

of the designs closed to changes in the pay system strategy. In this process, it is seldom considered whether an analysis, design, or implementation is in progress. Instead, focus on clear and closed questions, wherever possible, trying to identify potential abstractions.Here's what I got from Part four, "Packaged pay system":The "Design Principles for Packages" chapter describes how a dependency management metric can measure a design versus what I t

In web development, because differences between browsers are implemented differently, some sniffing work is unavoidable, such as the fact that we need to be able to use the universal event binding function in each browser addevent//General Wording//Cons: Every time he is called, it executes the IF condition,varAddevent =function(Elem, type, handler) {if(window.addeventlister) {returnElem.addeventlistener (type, Handler,false); } if(window.attacheve

[teamcolor]| | [];//all members of the team for(vari=teamplayers.length-1;i>=0;i--){ if(teamplayers[i]===player{Teamplayers.splice (i,1); } } }; //Players Change Teamoperations.changeteam=function(Player,newteamcolor) {operations.removeplayer (player); Player.teamcolor=Newteamcolor; Operations.addplayer (player); } //player DeathOperations.playerdead=function(player) {varTeamcolor=Player.teamcolor, Teamplayers=Players[teamcolor]; varAll_dead=true; f

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

the work of creating nodes in batches, such as creating 1000 nodes in 1 seconds, instead of creating 8 nodes every 200 milliseconds. varTimechunk =function(ary,fn,count) {varobj, t; varLen =ary.length; varStart =function(){ for(varI=0;i){ varobj =Ary.shift (); FN (obj); } }; return function() {t= SetInterval (function(){ if(ary.length ===0) {//If all the nodes have been Created. returnclearinterval (t);

half disagree. Software is what is used for users. If users are satisfied, is a good software, not good software if you are not satisfied. For the user, what he needs to pay is the software fee. Another part of the documents in the software

(); PrivateTurnstilecontroller Controller; PrivateIturnstitlestate State =Lockedstatus; PublicTurnsstatus (Turnstilecontroller Controller) { This. Controller =Controller; } Public voidcoin () {State.coin ( This); } Public voidPass () {State.pass ( This); } Public voidSetlock () { state=Lockedstatus; } Public voidSetunlock () { state=Unlockedstatus; } voidthankyou () {controller.thankyou (); } voidAlarm () {controller.alarm (); } voidLock () {controller.lock (); } vo

These three companion articles are written by Brian Swan. They are very good at agile development. ArticleI believe you will have some knowledge about agile development. 1. Agile Software