node js error class

This article will share with you the use of node. js is used to develop Weibo instances. After reading the nodejs Development guide, I found that many of the Code in the book is no longer available, because the express version has been upgraded, so today, I will try to develop Weibo instances and recommend them to you. I have been persistently engaged in front-end development before. In recent days, I start

Node. js module mechanism learning notes, node. js learning notes Javascript has never been used as a programming language since its birth. In the Web 1.0 era, this scripting language is mainly used for Form Verification and webpage special effects. It was not until the Web 2.0 era that front-end engineers used it to g

completed the setup, but you don't know if it can run correctly, let's write an example file to test it. Create example. js in the C: cygwin directory Input Var http = require ('http '); Http. createServer (function (request, response ){ Response. writeHead (200, {'content-type': 'text/html '}); Response. end ('Hello World'); }). Listen (8888 ); Console. log ('server running at http: // 127.0.0.1: 8888 /'); Save (Note: Save As UTF-8 format, otherwise

Get started with Node. js development-access the external world with http and access with node. js Node. jsHttp ModuleYou can not only build servers, but also access other servers as client class libraries. The key lies in two me

path. Node. js Website: http://nodejs.org/ Enter the tar xf node-v0.4.7.tar.gz in the Command window, node-v0.4.7.tar.gz for your own version. Enter the cd node-v0.4.7 in the Command window and press Enter. Enter./configure in the Command window and press Enter. Enter make

an error occurs. You can run the following code in Node PERL to test the effect. It simulates an event transmitter that can generate two types of events: The Code is as follows: Var em = new (require ('events'). EventEmitter )(); Em. emit ('event1 '); Em. emit ('error', new error ('My mistoke ')); You will see the f

working function, a completed function, and a struct that carries data transmitted across threads. The difficulty is to be familiar with v8 data structures and APIs.Test. js// test helloUV module'use strict';const m = require('helloUV')m.foo(1, 2, (a, b, c)=>{ console.log('finish job:' + a); console.log('main thread:' + b); console.log('work thread:' + c);});/*output:finish job:3main thread:139660941432640work thread:139660876334848*/Iv. Implement

);) IN THE 2_modules_diff_exports_load.js file, and return false, which is inconsistent with the previous result!PS: Do not use Counter. printNextCount (); to access it, you will only get an error promptAPI provides explanationsHttp://nodejs.org/api/modules.htmlNote that exports is a reference to module. exports making it suitable for augmentation only. If you are exporting a single item such as a constructor you will want to use module. exports direc

Agreement" to agree to the License Agreement and click Next. the following page is displayed: 　　 Step 4: Node. the default installation path of js is "C: \ Program Files \ nodejs \". You can modify it. Here I changed it to drive D and click Next. The installation mode and module selection page appears: 　　　 Step 5: Click Next by default. You are ready for installation: 　　 Step 6: Click Install to start inst

defined previously and is mapped to/routes/user. js. We will call the list function defined in this file. The user list is displayed here. Continue to add: The Code is as follows: Http. createServer (app). listen (app. get ('Port'), function (){Console. log ('express server listening on port' + app. get ('Port '));}); Finally, create an http server and start it. This is almost the case. (The above content is complete in the new template generated

defined previously and is mapped to/routes/user. js. we will call the list function defined in this file. The user list is displayed here. Continue to add: The code is as follows: Http. createServer (app). listen (app. get ('port'), function (){Console. log ('express server listening on port' + app. get ('port '));}); Finally, create an http server and start it. This is almost the case. (The above content is complete in the new template generated

This article mainly introduces the understanding and analysis of node. js event monitoring and triggering, and compares node. js and jQuery's practical skills on event monitoring in the form of examples, which helps to deepen the understanding of node.

has its weakness, mainly manifested in three aspects: failure to use multi-core CPU; error may cause the entire application to exit, and the robustness of the application is worthy of further study; A large amount of computing will occupy the CPU and thus cannot continue to call asynchronous I/O. To solve the above problem, Node adopts the same idea as HTML5 Web Workers and uses child_process to solve the

In node. js, q. js is used to implement api promise. node. jsq. js About what is promise and promise solution is what problem, please experience node callback asynchronous encoding method, along with the step http://wiki.commonjs.

module4, open Source component library quality is uneven, update fast, downward incompatible5, Debug inconvenient, error does not stack traceThird, suitable for node JS scene1. Restful APIThis is Nodejs ideal application scenario, can handle tens of thousands of connections, itself does not have too much logic, only need to request the API, organize the data to

can edit and compile it in vs2013.Of course, you can also directly use the node-gyp build command to compile.The test js program is as follows: The Code is as follows:Var hello = require ('./hello ');Console. log (hello. hello ());Some problems were encountered, as shown below:1. C: \ Users \ Administrator. node-gyp \ 0.10.33 directory does not have the default

interactively and view the running results.Compile a test programWe can also write a very simple terminal program to test whether the installation is successful and works properly. To do this, we will create a "test. js" file, which contains the following code: root@ubuntu-15:~# vim test.jsvar util = require("util");console.log("Hello! This is a Node Test Program");:wq! Now, in order to run the above pro