Ruby

charla de ruby para continuum tour

Transcript

1. CODE IS POETRY Ruby & Friends Monday, September 2, 13
2. MIGUEL MICHELSON https://github.com/michelson/ https://twitter.com/michelson/ RUBY DEVELOPER @ CONTINUUM Monday, September 2, 13
3. 7 AÑOS PROGRAMANDO EN RUBY/RAILS Monday, September 2, 13
4. @MICHELSON Monday, September 2, 13
5. Monday, September 2, 13
6. RUBY Lenguaje OOP Permite metaprogramar sintaxis muy expresiva facil de usar y extender Monday, September 2, 13
7. Yukihiro "Matz" Matsumoto Ruby es creado por Yukihiro "Matz" Matsumoto, quien comenzó a trabajar en Ruby en 1993, y lo presentó públicamente en 1995. Monday, September 2, 13
8. PRINCIPIOS Monday, September 2, 13
9. Monday, September 2, 13
10. Lenguage enfocado en los humanos , no las máquinas Monday, September 2, 13
11. Lenguage enfocado en los humanos , no las máquinas Diseñado para la productividad y la diversión del desarrollador Monday, September 2, 13
12. “Nosotros somos los jefes. No las computadoras.” Monday, September 2, 13
13. Optimized for Happiness Monday, September 2, 13
14. 7.times do puts "don’t repeat yourself" end Monday, September 2, 13
15. Monday, September 2, 13
16. IMPLEMENTACIONES Monday, September 2, 13
17. INTERPRETES MRI - 1.8.7, 1.9.3, 2.0 JRuby Rubinius MacRuby IronRuby mRuby Monday, September 2, 13
18. DIFERENTES USOS Web Apps Desktop Apps Command Line Mobile Apps Embebed system Monday, September 2, 13
19. RUBY ON RAILS Monday, September 2, 13
20. WEB APPS Monday, September 2, 13
21. Sinatra Padrino Camping Ramaze Grape Cuba Monday, September 2, 13
22. Rack provides a minimal interface between webservers supporting Ruby and Ruby frameworks. Monday, September 2, 13
23. DESKTOP/MOBILE APPS Java Swing QT RubyMotion Ruboto Monday, September 2, 13
24. COMMAND LINE APPS Capistrano RAKE THOR Chef Bundler Monday, September 2, 13
25. RUBY Reflexivo y OO Monday, September 2, 13
26. REFLEXIVO Permite examinar su estado y estructura o.class? o.superclass o.instance_of? o.is_a? o o.kind_of? o.respond_to? Name Monday, September 2, 13
27. OOP Define tipos de datos Crea operaciones sobre esos tipos Instancia tipos de datos Monday, September 2, 13
28. METAPROGRAMACION La metaprogramación consiste en escribir programas que escriben o manipulan otros programas (o a sí mismos) Ahorran la escritura de código Monday, September 2, 13
29. Monday, September 2, 13
30. METAPROGRAMACION User.find_by_id_or_last_name Monday, September 2, 13
31. ORIENTADO A OBJETOS Monday, September 2, 13
32. TODO ES UN OBJETO Monday, September 2, 13
33. PROBEMOS RUBY Monday, September 2, 13
34. Monday, September 2, 13
35. Paquetes - Gems • RubyGems • 60M+ gems cut since July 2009. • rails, sinatra, rvm , nokogiri, etc.. etc.. Monday, September 2, 13
36. Instalando una gema Monday, September 2, 13
37. Variables human = "you" Monday, September 2, 13
38. Tipos de variables local = ... @instancia = .... @@clase = .... $global = ... CONSTANTE = ... Monday, September 2, 13
39. Arreglos [] [1, “dos”, nil] [[“a”, 1], [“a”]] Monday, September 2, 13
40. Diccionarios {} { ‘a’=> 1, ‘b’=> 2} Hash.new Monday, September 2, 13
41. Sintaxis opcional Monday, September 2, 13
42. Interpolación de string Monday, September 2, 13
43. Interpolación de string Monday, September 2, 13
44. Interpolación de string Monday, September 2, 13
45. Interpolación de string Monday, September 2, 13
46. Metodos def my_method #code here .... end Monday, September 2, 13
47. Metodos Monday, September 2, 13
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54. Monday, September 2, 13
55. RUBY Monday, September 2, 13
56. Encadenar metodos Monday, September 2, 13
57. Encadenar metodos Monday, September 2, 13
58. Encadenar metodos Monday, September 2, 13
59. Encadenar metodos Monday, September 2, 13
60. Condicionales Es como en todos los lenguajes, if, else, case Pero ... Monday, September 2, 13
61. Condicionales Uso de unless OneLiner derecha a izq Ejemplo.. Monday, September 2, 13
62. Condicionales Monday, September 2, 13
63. RUBY Monday, September 2, 13
64. Iteradores ary = [1,2,3,4,5] ary.each do | num | puts num end result: 1 2 3 4 5 Monday, September 2, 13
65. Iteradores ary = [1,2,3,4,5] ary.each do | num | puts num end result: 1 2 3 4 5 Monday, September 2, 13
66. Iteradores ary = [1,2,3,4,5] ary.each{ | num | puts num } result: 1 2 3 4 5 Monday, September 2, 13
67. Iteradores ary = [1,2,3,4,5] ary.each{ | num | puts num } result: 1 2 3 4 5 Monday, September 2, 13
68. Iteradores ary = [1,2,3,4,5] ary.each{ | num | puts num } result: 1 2 3 4 5 Monday, September 2, 13
69. Iteradores ary = [1,2,3,4,5] ary.each{ | num | puts num } result: 1 2 3 4 5 Monday, September 2, 13
70. Iteradores Enumerator Monday, September 2, 13
71. Iteradores Monday, September 2, 13
72. Iteradores • each , inject , collect , select , map ... Monday, September 2, 13
73. Iteradores • each , inject , collect , select , map ... • {}.each.class #=> Enumerator Monday, September 2, 13
74. Iteradores • each , inject , collect , select , map ... • {}.each.class #=> Enumerator • [].each.class #=> Enumerator Monday, September 2, 13
75. Select Monday, September 2, 13
76. Select Monday, September 2, 13
77. Inject Monday, September 2, 13
78. Inject Monday, September 2, 13
79. Collect Monday, September 2, 13
80. Collect Monday, September 2, 13
81. Collect Monday, September 2, 13
82. Collect Monday, September 2, 13
83. Classes class Persona attr_accessor :nombre, :apellido end Monday, September 2, 13
84. Classes class Persona attr_accessor :nombre, :apellido end a = Persona.new a.nombre = “migue” #=>#<Persona:0x00718 @nombre="migue"> Monday, September 2, 13
85. Getters / Setters • attr_accessor # getter y setter • attr_reader # getter • attr_writter # setter Monday, September 2, 13
86. attr_writer :age = Monday, September 2, 13
87. attr_writer If you write: attr_writer :edad That gets translated into: def age=(value) @age = value end def age @age end Monday, September 2, 13
88. attr_reader :age = Monday, September 2, 13
89. attr_reader If you write: attr_reader :age That gets translated into: def age @age end Monday, September 2, 13
90. attr_accessor :age = Monday, September 2, 13
91. attr_accessor If you write: attr_writer :edad That gets translated into: def age=(value) @age = value end def age @age end Monday, September 2, 13
92. Constructores class Person attr_accessor :fname, :lname def initialize(fname, lname) @fname = fname @lname = lname end end Monday, September 2, 13
93. Constructores matz = Person.new("Yukihiro", "Matsumoto") Monday, September 2, 13
94. Herencia class Animal def barf puts “barf barf!” end end class Human < Animal end Monday, September 2, 13
95. Herencia class Animal def barf puts “barf barf!” end end class Human < Animal end Monday, September 2, 13
96. Modulos / Mixins Monday, September 2, 13
97. Modulos / Mixins • Ruby no soporta herencia multiple Monday, September 2, 13
98. Modulos / Mixins • Ruby no soporta herencia multiple • Pero soporta mixins Monday, September 2, 13
99. Modulos module Validator def validate! puts "no actor" if @actor.nil? end end Monday, September 2, 13
100. Mixin class Person attr_accessor :actor include Validator end incluye metodos de instancia Monday, September 2, 13
101. class Person attr_accessor :actor include Validator end p = Person.new p.validate! #=> “no actor” Monday, September 2, 13
102. Metaprogramacion • Permite la generación de metodos en tiempo de ejecución. • Sirve para escribir código que escribe codigo que escribe código. Monday, September 2, 13
103. Sin metaprogramación Monday, September 2, 13
104. Metaprogramación • Con meta programación %w(user email food).each do |meth| define_method(meth){ @data[meth.to_sym] } end Monday, September 2, 13
105. Metaprogramación • Con meta programación %w(user email food).each do |meth| define_method(meth){ @data[meth.to_sym] } end Monday, September 2, 13
106. Method missing Post.find_by_title("Awesomeness!") User.find_by_email("bob@gogl.com") User.find_by_email_and_login("bob@gogl.com", "bob") Monday, September 2, 13
107. Monday, September 2, 13
108. Method missing class ActiveRecord::Base def method_missing(meth, *args, &block) if meth.to_s =~ /^find_by_(.+)$/ run_find_by_method($1, *args, &block) else super end end Monday, September 2, 13
109. Method missing class ActiveRecord::Base def method_missing(meth, *args, &block) if meth.to_s =~ /^find_by_(.+)$/ run_find_by_method($1, *args, &block) else super end end Monday, September 2, 13
110. Comunidades • Ror-es google group • Irc ruby #freenode • http://www.ruby-forum.com/ • http://tryruby.org • railscasts.com • rubyweekly.com • rubyflow.com Monday, September 2, 13
111. Monday, September 2, 13
112. •Gracias! Monday, September 2, 13
113. ¿Listo para probar Ruby? http://tryruby.org Monday, September 2, 13