Node.js
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Node.js is a server-side JavaScript platform built on Chrome's V8 JavaScript engine. It uses non-blocking I/O and an event loop to handle many connections concurrently without blocking. Node.js is useful for building scalable network applications like JSON APIs and real-time applications. While JavaScript may seem an unusual choice, it has become a standard web programming language.
Node.js
- 1. Node.js HP.com Brown Bag Session 15 Feb 2012 Alif
- 2. What?! Server-side javascript Built on top of Chrome V8 – insanely fast, and getting better every day http://code.google.com/p/v8/ C: node server.js
- 3. Some facts.. Not a web framework.. Non blocking I/O – event loop Not written in javascript itself. It’s in C. Javascript is only, Function Object Number String Array Wasn’t designed for TCP / network stuff by nature
- 4. Why Node's goal is to provide an easy way to build scalable network programs.
- 5. How Keep slow operations from blocking other operations.
- 6. Traditional I/O var data = file.read('file.txt'); doSomethingWith(data); Something is not right here
- 7. FAIL ! var data = file.read('file.txt'); // zzzZZzzz … …. … . . . doSomethingWith(data); Don’t waste those cycles!
- 8. Async I/O file.read('file.txt', function(data) { doSomethingWith(data); }); doSomethingElse(); WIN ! No need to wait for the disk, do something else meanwhile!
- 9. Seriously, why javascript though :/ De facto standard language for web programming do not underestimate javascript, https://github.com/languages
- 10. Nodejs is… - Immature - Not yet proven at large scale code size Interesting reading: http://teddziuba.com/2011/10/node-js-is-cancer.html it's opaque and weird to most but completely usable for a small group
- 11. Best use for.. JSON APIs – heavy ajax call consumption Streaming data – parsing file uploads in real time Soft Realtime Applications – chat/IM, twitter, realtime scoreboards
- 12. Who use it Real world app, https://github.com/joyent/node/wiki/Projects,- Applications,-and-Companies-Using-Node .. growing rapidly each days
- 13. The beauty of Node is that you can write entirely simple and mundane JavaScript to get these results.
- 14. Node Modules NPM – Node package manager http://search.npmjs.org/ C: npm install express jade stylus Or, define it in package.json format, Then just hit npm install
- 15. { live demo session } Stalk here for more gossips: http://nodejs.org http://howtonode.org