Hungarian Webkonf: Why Node.js?

My talk for the Hungarian webkonf, targeting newcomers to get a feeling of node.js and inspire them to learn it.

http://risingstack.com

Transcript

1. Why Node.js?
   #webkonf
   Gergely Nemeth
   @nthgergo
   

   View Slide

2. WHOAMI
   nodebp.com
   oneshot.risingstack.com
   risingstack.com
   

   View Slide

3. JAVASCRIPT
   - created in 1995
   - runs in every major browser
   - prototype-based, dynamic typing, first-
   class functions
   

   View Slide

4. JAVASCRIPT
   

   View Slide

5. JAVASCRIPT
   not just the language of the browser any more
   

   View Slide

6. FIRST-CLASS CITIZEN IN OSX
   

   View Slide

7. INTERNET OF THINGS
   

   View Slide

8. IN THE CLOUD
   

   View Slide

9. NODE.JS
   “for easily building fast, scalable network
   applications”
   

   View Slide

10. NODE.JS
    - V8
    

    View Slide

11. NODE.JS
    - V8
    - nonblocking I/O
    

    View Slide

12. NODE.JS
    Blocking I/O
    the traditional way
    Nonblocking I/O
    the Node.js way
    

    View Slide

13. NODE.JS
    - V8
    - nonblocking I/O
    - event driven
    

    View Slide

14. NODE.JS
    - V8
    - nonblocking I/O
    - event driven
    - single threaded
    

    View Slide

15. CALLBACKS
    fs.readFile('/file', function(err, data) {
    if (err) throw err;
    console.log(data);
    });
    

    View Slide

16. SOME OF THE ADOPTERS…
    

    View Slide

17. THE PAYPAL CASE-STUDY
    existing Java stack
    

    View Slide

18. THE PAYPAL CASE-STUDY
    Java and Node in parallel
    

    View Slide

19. THE PAYPAL CASE-STUDY
    One Language to Rule them all
    

    View Slide

20. THE PAYPAL CASE-STUDY
    Now all new apps at PayPal are written in
    Node.
    

    View Slide

21. THE PAYPAL CASE-STUDY
    - Headcount: from ⅓ to 1/10
    - Performance: 10x throughput in scale
    - Lines of code: code size shrink by factor of
    3-5
    

    View Slide

22. HOW?
    

    View Slide

23. View Slide

24. NPM
    - open repository for Node modules
    - proper SemVer
    - more than 100.000 modules
    - open source all the things!
    

    View Slide

25. NPM
    Would be nice to use all this in the browser as
    well?
    

    View Slide

26. View Slide

27. BROWSERIFY
    - require('modules') in the browser
    - bundling up all of your dependencies from
    the node_modules dir
    - does not pollute the global scope
    http://blog.risingstack.com/publishing-your-first-browserify-node-module/
    

    View Slide

28. BROWSERIFY
    // main.js
    var $ = require('jquery');
    $('body').append('Hello Browserify!');
    npm install jquery --save
    browserify main.js -o bundle.js
    

    View Slide

29. Which brings us to...
    

    View Slide

30. ISOMORPHIC JAVASCRIPT
    http://blog.risingstack.com/from-angularjs-to-react-the-isomorphic-way/
    

    View Slide

31. Thanks!
    Gergely Nemeth
    @nthgergo
    

    View Slide