microservice patterns and best practices

=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

2005-1-30 [. Net Development]Enterprise Library (PAG Documentation)#The patterns Practices Enterprise Library is a library of application blocks designed to assist developers with common enterprise development challenges. application blocks are a type of guidance, provided as source code that can be used 'as is, 'Extended, or modified by developers to use on enterprise development projects. enterprise Li

Analysis of Android source code design patterns and practices (16)Chapter 2 visitor Mode Visitor mode is a behavior mode. It is the most complex of the 23 design modes. Although the frequency of use is not high, it does not mean that it can be ignored, it brings unexpected flexibility. Visitor mode, as the name implies, with this mode, you can add additional "visitors" without modifying the existing progr

This article mainly introduces PHP objects, patterns and practices of advanced features, combined with examples of PHP object-oriented programming in the static properties and methods, abstract classes, interfaces, interceptors, cloning objects and other concepts and simple implementation methods, the need for friends can refer to the next Specific as follows: Advanced Features Including: 1. Static Methods

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,

the Observer class, the only way to implement the Observer Interface update void Update (Observable o, Object Arg) The parameter, object arg, corresponds to an argument passed by Notifyobservers (object Arg), and when the Notifyobservers () is executed, ARG is null. A simple example is given below: PackageDesignpattern_observer;Importjava.util.Observable; Public classMybuttonobserableextendsObservable {PrivateString Clickmode; PublicString Getclickmode () {returnClic

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