node js foreach loop

Note: Original address http://blog.csdn.net/oscar999/article/details/8671546I am here to imitate the study!1, the array of JS loop traversalThe traversal of the ① array is the first thought of the for () Loop statementvar arr = [' Summer ', ' I ', ' love ', ' You '];for (Var i=0, length=arr.length; i② Second, a simpler approach to

This article mainly introduces node. for details about js Implementation of BigPipe, BigPipe is a technology developed by Facebook to optimize webpage loading speed. The core concept of BigPipe is to use only one HTTP request, but the page elements are not sent in order, for more information, see BigPipe, a technology developed by Facebook to optimize webpage loading speed. Almost no articles are implemente

Node. js has quickly benefited from its event-driven and asynchronous features. This article will introduce 10 articles. It has been tested that it can greatly improve the skills of Node applications. Let's take a look at NodeJS one by one as a server-side JavaScript interpreter, which will change the concept of how the server works. It aims to help programmers b

Analyzes the callback and code design modes in Node. js asynchronous programming, and node. js design modes The biggest selling point of NodeJS is the event mechanism and asynchronous IO, which is not transparent to developers. Developers need to write code in asynchronous mode to use this selling point, which has also

configure, just run node-gyp build directly.Nodejs usageCreate an index. js and see how to use this module: The Code is as follows:Var sleep = require ('./build/Release/hello. node'). sleep;Console. log (new Date );Sleep (1000 );Console. log (new Date );// Result// Wed Mar 04 2015 14:55:18 GMT + 0800 (Chinese Standard Time)// Wed Mar 04 2015 14:55:19 GMT + 0800

Js forEach, jsforeachZookeeper The forEach () function traverses the array from start to end. There are three parameters: array element, element index, and array (if a parameter is an array element, it is the value of the array. Var data = [1, 2, 3, 4, 5, 6];Var sum = 0;Data. forEach (function (v) {// where v is th

configure, just run node-gyp build directly.Nodejs usageCreate an index. js and see how to use this module: The code is as follows:Var sleep = require ('./build/Release/hello. node'). sleep;Console. log (new Date );Sleep (1000 );Console. log (new Date );// Result// Wed Mar 04 2015 14:55:18 GMT + 0800 (Chinese Standard Time)// Wed Mar 04 2015 14:55:19 GMT + 0800

event queue, and the callback function of the processing result will be left. The event loop thread (which is similar to RunLoop in ios) processes tasks in the event queue, until the callback function no longer exists. 2. Without blocking, a function with callback is put into the event queue, and the event loop thread is extracted and executed. 3. when I/O blocking (Reading files, querying databases, reque

Node. js has to say 12 points. node. js has to say 1. node. js: javascript on the server side. It allows javascript code to be run on the backend (out of the browser environment. 2. event-driven, asynchronous I/O programming mode

This article mainly introduces node. in js, You Can format numbers to add thousands of characters. This article provides three implementation methods and provides the instance Code respectively. For more information, see the processing method separated by commas (,). Regular Expression mode: The Code is as follows: "15000000 ". split (""). reverse (). join (""). replace (/(\ d {3})/g, "$1 ,"). split ("").

Advanced browsers (including IE9 and above) support the map and foreach methods to loop through the array, with the same usage, but there are some differences that must be known in order to correctly select in the project Principle: Advanced browsers support the Foreach methodSyntax: both foreach and map s

This article mainly introduces Node. callback and code design patterns in js asynchronous programming. Although long string parentheses during callback writing are not very nice in most cases, Node's asynchronous performance is indeed good, for more information, see the event mechanism and asynchronous IO, the biggest selling point of NodeJS, which is not transparent to developers. Developers need to write

This article mainly introduces Node. the event-driven programming in js is explained in detail. This article mainly describes theoretical knowledge, such as what is event-driven programming, What Is closures, and how closures help asynchronous programming, if you need it, you can refer to the traditional programming model. I/O operations are like a common local function call: The program is blocked before t

This article mainly introduces how to use Meteor with Node. js Code example of real-time chat application, Node. as an asynchronous framework, js is used to compile real-time applications. For more information, see Derby. the framework for js comparison is Meteor.

foreach is the most basic of the new array method in ECMA5, that is, traversal, loop. For example, the following example:[1, 2, 3, 4].foreach (alert);is equivalent to the following for loop1 var array = [1, 2, 3, 4]; 2 for (var k = 0, length = array.length; k ) {3 alert (array[k]); 4 }Array in ES5 new method, the parameters are function type, the default is the

Node. js blog instance (7) Paging function, node. js Paging Original tutorial. Adds the paging function to the homepage and user pages of a blog. Set: up to 10 articles can be displayed on each page of the home page and user page.Here the skip and limit operations of mongodb are used.Open post.

Loop When only timer callback functions exist in the event queue, if you do not want to execute them, you can use setInterval and setTimeout to return the unref () Functions of the object to notify the event loop not to continue. When unref () and setTimeout are used in combination, an independent timer is used to wake up the event loop. A large amount of use wi

JS traverses child node search elements and js node search Elements Function nextChildNode (node, clazz, tagName) {var count = node. childElementCount; for (var I = 0; I JS search fo

Use node. js to create the website front-end and node. js front-end What can node. js do? I still don't know where he is widely used, and I have no chance to access such a project. Just because I like it, I made a website and back

This article mainly introduces. js Implementation of file replication methods and instances, using the FS module, friends can refer to the next Node. js does not provide APIs for directly copying files. If you want to use Node. js to copy files or directories, you need to us