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, which is obviously far from the real sleep.
What if we implement a real sleep?
Environment preparation
Development Environment
Some of my blogs have said that node. js + npm, python 2.7, visual studio/x-code.
Compilation tool
The compilation tool must use node-gyp. Later versions of nodejs come with this library. If node
It is easy to manually run the Node project on a computer, nodexx. javascript is done. If you want to run the Node project in the background, you cannot directly use the node command. However, it is easy to install the forever package. However, if a
1.1.61023
When we think we have captured the lagging behavior, we can run the following code to stop the analyzer:
slc ctl cpu-stop 1.1.61023
Run the following code to write a file to the hard disk:
CPU profile written to `node.1.1.61023.cpuprofile`, load into Chrome Dev Tools
Okay, that's it. You can load the file into Chrome for further analysis as in the V8 a
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
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 following output:
The Code is as follows:
Var em = new (require ('events'). EventEmitter
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. eve
[Simple introduction to node. js] excerpt 2: simple introduction to node. jsChapter 2 module Mechanism
1. The purpose of the CommonJs specification is to allow JavaScript to run anywhere.
2. For a long time, JavaScript has the following defects:
(1) No Module System
(2) fewer standard databases
(3) No standard interfac
, which is obviously far from the real sleep.
What if we implement a real sleep?
Environment preparation
Development Environment
Some of my blogs have said that node. js + npm, python 2.7, visual studio/x-code.
Compilation tool
The compilation tool must use node-gyp. later versions of nodejs come with this library. if node
First glance at node. js and node. js
Node. js is a platform based on Chrome JavaScript runtime. It is used to conveniently build fast and scalable network applications.
Node.
simple, using NPM-g express-generatorThis is the program to install Express (not the project, only add this program to create an express project)Then you can create a new project (project)-ecd blog npm installLike this, a blog project is set up, and then just run.You can run NPM start directly at the root of the project or into the bin directory directly node www is all right, probably look at the directo
Node. js event-driven, node. js event
Node. js event-driven implementation Overview
Although the ECMAScript standard does not (and is not necessary) specify "Events", in the browser, Events Act as an extremely important mechanism,
environment. After installation, make sure to run the program in harmony mode by using $ node app. js -- harmony or (-- harmony-generators.I personally think it is more reliable to use Express in a formal product.Rest development-Restify
Restify is a node. js-based REST app
Node. js supports multi-user web Terminal Implementation and security solutions, and node. js supports multiple users
As a common feature of local IDE, terminal (command line) supports git operations and file operations of projects. For WebIDE, without a web pseudo-terminal, only the encapsulated command line interface
Promise.all([randomDelay(), randomDelay()]); console.log('pass'); await randomDelay();}main();
n use 7.6.0 async.js
You will see the output result similar to the following, indicating that we do not need babel. We can directly use Node 7.6.0 to support async/await.
delay 252 msdelay 964 mspassdelay 536 ms
Finally, we can create a quick command:
echo alias node7="\"n use 7.6.0 --harmony-async-await\"" >> ~/.bashrcsource ~/.bashrc
In this way, we can h
Node. js is a Javascript runtime environment ). This article introduces you to the Getting Started tutorial on Node. js + Express configuration. It is recommended that you learn about Node. js as a Javascript runtime environment )
Getting started with Node. js + Express configuration, and getting started with node. js
Node. js is a Javascript runtime environment ). In fact, it encapsulates the Google V8 engine. V8 cited worker to execute Javascript very qui
) { // ... do something with results ... });
}The key point is that the use of node. js asynchronous APIs does not depend on multi-process applications.
Solution 3: Use the thread library for asynchronous processing.
As long as the implementation is proper and the library implemented using local code can break through the restrictions during NodeJS calls to implement multi-threaded functions.
There are man
Node. js network communication module implementation analysis, node. js Network Communication
Preface
Presumably, we should use Node. js most to create http services. Therefore, for every Web Development Engineer,
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