JavaScript for the REST of Us (pt_BR)

Palestra ministrada para a equipe da Informant e ContaAzul em maio de 2012.

Transcript

1. JavaScript ... for the rest of us!
2. Why the hype about JavaScript? • Web Application Distributed Processing • Face the Server Side Development Approach • Improve Web User Experience • Browsers War's Protagonist
3. ... but at early stages was JavaScript a document.getElementById based language?
4. JavaScript Designed to be a procedural programming language!
5. Procedural Programming... simply contain a series of computational steps to be carried out.
6. JavaScript ... but it also have structs like C programming language!
7. OKAY I'M IMPRESSED.
8. BUT WAIT! JavaScript can also provide a powerful a OOP programming environment!
9. NOW I'M CONFUSED! ¬¬
10. The world needs heroes to bring JavaScript to "braços da galera"
11. Today Heroes • jQuery ( 2006 ) • MooTools ( 2006 ) • YUI ( 2006 ) • Dojo Toolkit ( 2004 ) • ExtJS ( 2007 ) • ActiveWidgets ( 2004/5 ) • Prototype • Scriptaculous • ... other thousands implementations.
12. JavaScript Structures... ...are also known as JavaScript Objects, writen in JavaScript Object Notations (JSON).
13. JavaScript Classes... ...are any callable functions.
14. Its variables... ... are always a reference to a memory instantiated object.
15. When everything is reference... ... data integrity inside application can be a little odd.
16. As Procedural Programming... ...JavaScript functions have no maintainer class, no parent class... nothing but a code stack!
17. Buzzword CLOSURE
18. Closure NOT JUST A TECHNIQUE, BUT A GOOD PRACTICE
19. Default API • Window public functions • Array, String, Boolean, RegExp, Function, Date, Object... • Some Browsers specific classes • DOM Layer 1 • DOM Layer 2
20. By default we got no • Scope namespaces / packages • No simple class implementations • No threads • No event driven architecture • ... just a low level API to handle browsers' things.
21. Frameworks? WHEN YOU NEED TO WORK WITH ONE OF THAT FEATURES, YOU BETTER FIND A FRAMEWORK.
22. THE END JAVASCRIPT BECOME MORE SIMPLER WHEN YOU KNOW HOW IT WAS DESIGNED. Autor: Miere Teixeira E-mail: miere.teixeira@gmail.com / miere@contaazul.com Twitter: @miere