Groovy Talk 2013 - javaMexico.org

Transcript

1. Groovy Language
2. Javier Ramírez javaMexico.org Founder COO and Co-Founder @ SintelTI @_benek on Twitter Who am I?
3. ¿Groovy?
4. ¿Groovy?
5. ¿Groovy?
8. programming language for the JVM
9. Java Lang Bytecode
10. Java Lang Bytecode Jython JRuby Scala Clojure Groovy +250...
11. ... +250
12. = ¿?
13. = Java
14. = Super Java
15. = Java + Esteroids
16. Object Oriented Dynamic Compact Inspired by Ruby, Python, Perl, Smalltalk, Java Features
17. “Hello World”
18. “Hello Cruel World”
19. Java
20. Groovy
21. Groovy takes care of your Java knowledge But you can write with “the groovy way”
22. Groovy
23. Groovy
24. Groovy
25. Groovy
26. Groovy optional semicolon
27. Avoid concatenation “Hello “ + name;
28. Avoid concatenation “Hello “ + name;
29. Avoid concatenation “Hello “ + name; “Hello $name”
30. you don’t need to “return” The last value or expresion will be returned by Groovy
31. avoid parentheses in many methods println “Hello $name”
32. “def” keyword avoids declaring type, type will be inferred dynamic typing
33. The Groovy way...
34. Groovy can run code like in a script scripting
35. Groovy can run code like in a script scripting
36. Native support for collections List, Maps, Arrays
37. Native support for collections List, Maps, Arrays
38. Groovy Ranges
39. Groovy Ranges
40. Groovy Ranges
41. Maps
42. Maps
43. spread-dot operator invoke a method which iterates through all items of a collection
44. spread-dot operator invoke a method which iterates through all items of a collection
45. Advanced Features Closures Metaprogramming AST transformations
46. A closure... anonymous code block that can be assigned to a variable
47. A closure...
48. A closure...
49. A closure...
50. A closure...
51. Metaprogramming Ability to add methods and properties at runtime
52. Metaprogramming times() method in Integer? this behaviour is added by Groovy at runtime
53. Metaprogramming
54. más info... groovy.codehaus.org javamexico.org
55. ¡Gracias!
56. Javier Ramírez Jr www.javamexico.org www.sintelti.com.mx twitter: @_beneK