node js console debug

How to Use stream in node. js: node. jsstream I ran to learn OC in these days, but I haven't learned it yet. There is still a long time to leave the job. By the way, let's review the knowledge of node. There are a lot of people coming and going in every language, but I can't do without

terminal, first in the terminal you want to see the log input:$ ttyYou can get the terminal number, for example:/dev/ttys003Then another terminal uses:$ geth console 2>> /dev/ttys003Start Geth, which is the log output to another terminal.If you do not want to see the log, you can redirect to an empty terminal:$ geth console 2>> /dev/nullLog level ControlYou can use --verbosity to control the log level, and

Turn from:Nine console commands to make JS debugging easierI. Commands to display information 123456789101112131415 "Content-Type" content="text/html; charset=utf-8"/> The most common is the console.log.Two: PlaceholderConsole The above concentration supports printf placeholder format, supported placeholders are: characters (%s), integers (%d or%i), floating-point numbers (%f), and

Recently written program node. data storage is required for js programs. there are many databases that js can use, such as mongodb and MySQL. However, I still think these databases are too large to be useful, making them more troublesome. So I found node-tiny, a non-relational database, a bit similar to mongodb.Tiny's

Just read about the JS Blog when found that this method is very fun, I have a cool.1 When loaded, the console displays the following:　　　Can see, different nature of the information in front of the different icons, and each message has a hyperlink behind, click to jump to the corresponding line of the source page.Second, placeholder　　You can use the printf-style placeholder for the top 5 methods of t

Introduction to the Node. js lightweight Web framework Express4.x User Guide, node. jsexpress4.x Express is a lightweight Web framework that is simple and flexible It is also the most popular Nodejs-based Web framework. With this feature, we can quickly build a complete website (express) Express is now in version 4.x, which is updated quickly and is not compatibl

(function (request, response) { response.writehead (200,{ ") Content-type ":" Text/plain " }); Response.Write (DoSomething ()); Response.End ();}). Listen (console.log); (' Server running at http://127.0.0.1:3000 '); function dosomething () { Then execute the Supervisor Hello_world.js. As shown, the console tells me that he is already monitoring my project.Then I changed the welcome speech.function dosomethi

Before writing a Node application, you must first learn the Node modules and packages. Modules and packages are the basic units of applications. A Node. js file is a module, which may be Javascript code, JSON, or compiled C/C ++ extensions. var count=0;exports.next=function(){return count++;} Instance: var n

This article mainly introduces the node module mechanism and detailed information about asynchronous processing. For more information, see 1. Module Mechanism The purpose of the commonJS module mechanism is to build an ecosystem of js in terms of web servers, desktop programs, and browsers. Node js is an implementati

to the location where the code is called. Console.assert (expression[, Object, ...]) Tests whether an expression expression is true. If not true, a message is written at the console and an exception is thrown Console.dir (object) Outputting all the properties of an object in a list is a bit like the way you look at the Dom window. Console.dirxml (node) Output an XML source code for an HTML or XML ele

shown in the following code snippet. $ npm lshello-world@0.0.1 /private/tmp└─┬ express@3.0.0beta7 ├── commander@0.6.1 ├─┬ connect@2.3.9 │ ├── bytes@0.1.0 │ ├── cookie@0.0.4 │ ├── crc@0.2.0 │ ├── formidable@1.0.11 │ └── qs@0.4.2 ├── cookie@0.0.3 ├── debug@0.7.0 ├── fresh@0.1.0 ├── methods@0.0.1 ├── mkdirp@0.3.3 ├── range-parser@0.0.4 ├─┬ response-send@0.0.1 │ └── crc@0.2.0 └─┬ send@0.0.3 └── mime@1.2.6 Now create the application itself! Create a fi

Three implementation methods for synchronous operations in node. js, node. js3 As we all know, Asynchronization is a unique feature and advantage, but it is also common to require synchronization in the Program (for example, the execution sequence of the control program is func1-> func2-> func3. This article records some of your thoughts on this issue. Functions

node's handy tip--Compression codeDownload ImageCompress CodeI believe many front-end students will be on the line before the compression JS code, now Gulp Webpack Grunt ... can be easily achieved. But the problem comes, these will not, it is necessary to face dozens of JS files back and forth "copy-compress-Create-paste", this is too impersonal.It can be easily implemented with

Use pure Node. JS to pop up the Windows system message box instance (MessageBox), node. jsmessagebox Node. JS is a console program. If you want to pop up a Windows Prompt box from Node.

Node. js mysql package instructions, node. jsmysql Author: zhanhailiang Date: 2014.11.16 This article explains how to rely on the mysql package on the node. js platform to access mysql. 1. installation: [root@~/wade/nodejs/nodebeginner/mysql_test]# npm install mysql 2. mysql

Example of Node. js readline Reading and Writing File Content line by line, node. jsreadline This article describes the two implementation methods of reading data row by row using readline. The details are as follows: What is Readline? Readline is an encapsulated module for implementing standard input and output in Node