node js debug mode

/fingerprint + pgltzybzcm9 "http://www.2cto.com/uploadfile/Collfiles/20140509/2014050909132231.jpg" alt = "\"> After the installation is successful, follow these steps. Then we can use the express command to create the item directory. If express is not an internal command error, check whether express is in the C: \ Users \ Administrator \ AppData \ Roaming \ npm directory. cmd file, such as: if not, npm install express-generator-g will have express. cmd file; Switch to the

Concept Node. js is a platform built on Chrome javascript runtime. It is easy to build fast, scalable network applications. Node. js uses the event-driven, non-blocking I/O mode, which enables it to be lighter, efficient, and perfect for data-intensive real-time applications

node. JS is a platform built on the chrome JavaScript runtime to easily build fast, easy-to-scale Web applications · node. js with event-driven, non-blocking I/O models become lightweight and efficient, ideal for data-intensive real-time applications running on distributed devices[2]

2.1 Installing ExpressIf a package is a dependency of a project, then we need to install the package in local mode in the project directory, and if you want to invoke the command in this package from the command line, you need to install it in global mode. Express provides a tool for quickly building projects on the command line, so we use global installation:$ NPM Install-g Express　　2.2 Establishment of th

: The code is as follows: Var buffer1 = new Buffer (8 );Buffer1.write ('Nice to meet U', 'utf8 ');Var buffer2 = new Buffer (8 );Buffer1.copy (buffer2 );Console. log (buffer2.toString (); // nice to meet u Stream module In UNIX operating systems, stream is a standard concept. There are three major streams: 1. standard input2. standard output3. standard error Readable stream If the buffer zone is the method by which Node.

provides built-in Web servers. PHP also has similar artifacts, that is, Swoole extension. With Swoole extension, you can develop a high-performance, secure, and stable server program. It is no inferior to Node. js and is more powerful than Node. js in some aspects. Swoole is written in C and runs in PHP extension

Label:node. js efficiently manipulating MongoDBMongoose Library in short, a convenient package for manipulating MongoDB databases in the node environment, an object model tool similar to Orm,mongoose converts data from a database into JavaScript objects for you to use in your app. Of course, you have to install the Environment node.

loaded from the buffer. If the buffer has not been loaded, then the loading mode of the native module is called to load and execute.Load from FileWhen the file module does not exist in the cache, and is not a native module, node. js parses the parameters passed in by the Require method and loads the actual file from the file system, and the wrapper and compilati

Record several node. js errors and Solutions Several node. js errors and solutions are as follows: Node. js Error: EBADF, write I recently wrote a small project for my work. I thought I could have had a good tea, but I was surpris

business logic cannot be distributed across multiple processes and the transaction length is much larger than multithreaded mode.The necessity of asynchronous IOThe total time spent on these two tasks by a program that synchronizes is M + N. However, if you are using an asynchronous program, the time overhead will be reduced to Max (M, n) in situations where two I/O can be parallel (such as network I/O and file I/O). And when parallel tasks are more, M + N + ... With Max (M, N, ...) The best of

global modenpm install -g (3) Global directory in Mac//安装包所在目录/usr/local/lib/node_modules///运行命令的软链接所在目录/usr/local/bin(4) View the installation package path//查看当前包的安装路径npm root//查看全局的包的安装路径npm root -g(5) Setting the Global mode installation directory//设置后，以全局模式将会安装在此目录中，不过需要手动加入PATH，切记npm config set prefix (6) View default mode//默认返回：false$ npm get global$ npm config get global(7) Set to the default in glo

callback function. The callback function is the first of the actual arguments is err, and the rest of the arguments are the other returned content. If no error occurs, The value of err will be null or undefined. If an error occurs,err is usually an instance of the Error object. Synchronization mode:Fs.readfilesync (Filename,[encoding]).Fs.openFs.open (Path,flags, [mode], [Callback (Err, FD)])Path, flag is the way to confirm the opening of the file (

, data) {if (err) {Console.log (Err.stack);Return}Console.log (Data.tostring ());});Console.log ("program execution Complete");The above program Fs.readfile () is an asynchronous function used to read the file. If an error occurs during the reading of the file, the error Err object will output an error message.If no error occurs, ReadFile skips the output of the Err object, and the contents of the file are output through the callback function.Execute the above code and execute the result as foll

-Type‘:‘text/plain‘}); res.end("Hello World\n");}).listen(8124,"127.0.0.1");console.log("Server running at http://127.0.0.1:8124/");Then press ESC , exit edit mode, enter :w save, and then enter :q exitThen enter the following command at the terminal:trigkit4:~ trigkit4$ node indexYou can see the terminal output:Server running at http://127.0.0.1:8124/Then open the browser, enter the address to see the outp