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This article mainly introduces Custom Event instances in node. js. A simple example. For more information, see the EventEmitter that inherits events, then you can register the event through the on; emit triggers the event and removeListener removes the event. A simple example is as follows: Var util = require ('util'); var Et = require ('events '). eventEmitter; function Ticker () {var self = this; setInterval (function () {self. emit ("tick")

Javascript is a computer programming language. It is also known as a dynamic language and a parsing programming language. Need to know more 1. the right and right in JS Javascript is a computer programming language. It is also known as a dynamic language and a parsing programming language. Why is it a script? Because he cannot execute itself, that is, there is no main function or main program entry, and he must be parsed and executed by his host envi

This article is mainly to JS get the current address JS get the current URL of the sample code is introduced, need friends can come to the reference, I hope to help you. nbsp; Code as follows: ; nbsp;

Build a simple Chat program using node. JS and Socket.ioCreate a folder under the node. JS root Chat, add two files inside: App.js and index.htmlApp.jsvarFS = require ('FS'), HTTP= Require ('http'), Socketio= Require ('Socket.io'); varServer =Http.createserver (function (req, res) {Res.writehead ( $, {'Content-type':'text/html'}); Res.end (Fs.readfilesync (__dirname+'/index.html'));}). Listen (8080, functio

Server.js/*The following code will be explained in detail below.*/varExpress = require (' Express ');//used to introduce express modulesvarApp = Express ();//Express Instance ObjectApp.set (' Port ', Process.env.PORT | | 3000);varFavicon = require (' Serve-favicon '));//Server.jsvarTOUSD = require ('./routes/tousd.js '));//App.use (TOUSD.AAA);//Console.log (TOUSD.AAA ())//Console.log (TOUSD.BBB ())App.use (TOUSD.BBB);//set Port toApp.get ('/',function(req, res) {//set the route of the home page

DemandThe list is sorted by an ID first, followed by an attribute with the same ID. Final Display effect:Implementation codevar Data.Items =[{' brand_id ':1,' farm_id ':2}, {' brand_id ':1,' farm_id ':3}, {' brand_id ':2,' farm_id ':4}]function Multisort(Array,...compairers){ return Array.Sort((A,b= { for(ConstC of Compairers){ ConstR= C(A,b; if(r!== 0){ returnR; } } });}Multisort(Data.Items,(A,b= a.brand_id - b.b

1. JS data types are divided into: numeric, Boolean, stringWith typeof you can see what the specific data type is.Example:2.js composite data type: divided into arrays, objects3. Special data type: null, var a=null;Undefine4.parseInt (); cast into integers;5. A+=90 =>a=a+90;B+=a =>b=b+a;B%a modulo, that is to take the remainder

I was in the debugging code, with the execution of JS code, generally by using alert in the code block to view the implementation of the JS code, today is also to see friends using the Console.log function to print output functions, variables, objects, The following is used to record the use of Console.log, the specific syntax is: Console.log ("value is:", FN); Console.log () Can output variabl

parameters: If (engine implements invocable) ((invocable) engine). Invokefunction ("Afunction", param1, param2); If the scripting language is Object oriented, you call can a as this: Code View: ((invocable) engine). InvokeMethod (Implicitparam, "Amethod", explicitParam1, EXPLICITPARAM2); 6) Compiling a Script Reader reader = new FileReader ("Myscript.js"); Compiledscript script = null; If (engine implements compilable) Compiledscript script = ((compilable) engine). compile (reader); if

The page uses DateTimePicker to get the data type "12:12:12" if the input "11:11:11" to automatically calculate the time difference code as follows: var a= "12:49:00", b= "14:49:00"; S=a.split (":"); E=b.split (":"); var Daya = new Date (); var Dayb = new Date (); Daya.sethours (S[0]); Dayb.sethours (E[0]); Daya.setminutes (S[1]); Dayb.setminutes (e[1]); Alert ("B more than A:" + (Dayb-daya)/1000/60+ "minutes") The above JS time comparison

Hover mouse over the picture: Onmouseover= "MouseOver ()" onmouseout= "Mouseout ()" > JS Display weather forecast: www.cxybl.com "Http://m.weather.com.cn/m/pn11/weather.htm" width= " JS use focus to achieve the choice of Web site: www.cxybl.com var i = 1; var Focusid; function Defau () { document.getElementById ("1"). focus (); focusid=1; } function showtable () { var id = i + 1; docume

JSON (JavaScript Object notation) is a lightweight data interchange format that takes a completely language-independent text format, and JSON is a JavaScript native data format. Here are two ways of adding JSON data to JS arrays. The first way Personinfo : [], for (var i = 0; i The second way var passengerinfo = {}; Passengerinfo.psgtypedesc = Psgtypedesc; Passengerinfo.flightprice = Flightprice; _stage.passengerinfoarray.push

The code is very simple, the main idea is to parse the URL parameters to JS object, and then do add, delete, change, check the operation is very convenient ~, take notes here. Copy Code code as follows: var lg= (function (LG) { var objurl=function (URL) { this.ourl=url| | Window.location.href; This.href= ""; the front part This.params={};//url Parameter Object This.jing= "";//#及后面部分 This.init (); } Parse the URL, get the front dep

JS can add delete picture upload box JS codeThis section of the program can detect the user upload picture type, size, before uploading, but also can increase the number of file upload, is the number of indeterminate files, imitation 51 space that file on the code

The looks like this: More than this JS focus diagram, JS multiple pages to put multiple focus on the example is a small series to share all the content, hope to give you a reference, but also hope that we support the cloud habitat community.

This article brings you to the content is about JS in the definition of closure is what? JS closure of the application scenario, there is a certain reference value, there is a need for friends to refer to, I hope you have some help. What is a closure package Closures are functions that have access to variables in another function scope. function Createfunc () { var name = "Wheeler"; return function (

Http://bbs.blueidea.com/thread-2430778-1-1.html) I sorted out several common webpage advertisement codes. Demo address:Http://www.makewing.com/lanren/js/01/index.htmHttp://www.makewing.com/lanren/js/02/index.htmHttp://www.makewing.com/lanren/js/03/index.htmHttp://www.makewing.com/lanren/js/04/index.htmHttp://www.makewi

Require. js: a deep understanding of require. js features Now, Require. js is my favorite Javascript programming method. It can reduce code to zero and facilitate management. The Require. js Optimizer can help us to scatter a large application into multiple small applications, connect them through dependencies, and fin

Three. javaScript is a great open-source WebGL library. WebGL allows JavaScript to operate on the GPU and implement 3D with the true meaning on the browser side. This article introduces THREE. the JS basic browser supports setting the scenario to build the object attributes of the mesh surface material, such as the general object attributes of the Light rendering loop. If you are interested, you can learn Three. javaScript is a great open-source WebGL

Node. js implements the JS file merging tool and node. jsjs file Merging As the Spring Festival approaches, the project is over and there is nothing to do, so I want to learn node. js, I wrote a small plug-in that uses c # To Compress and merge js Code to meet the needs of lab projects. Later I thought I could use node