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seja feliz com ruby

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lucas renan

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nu

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guru sorocaba

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sad panda

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yukihiro matsumoto

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perl, smalltalk, eiffel, ada, lisp

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ruby permite que você seja feliz

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uhull, valeu matz :)

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5.times { puts "We love Ruby" }

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puramente orientada a objetos

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1.class # => Fixnum

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1.class # => Fixnum "ruby".class # => String

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1.class # => Fixnum "ruby".class # => String 1.to_s.class # => String

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ruby permite que você escreva código elegante

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class Person end person = Person.new

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class Person attr_accessor :name end person = Person.new person.name = "lucas"

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class Person attr_accessor :name, :age end person = Person.new person.name = "lucas" person.age = 24 puts person.age # => 24

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class Person attr_accessor :name, :age def is_adult? @age > 18 end end person = Person.new person.name = "lucas" person.age = 24 puts person.is_adult? # => true

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active support

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require "active_support/all" 1.day.ago # => 2013-08-09 00:00:00 -0300

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require "active_support/all" 1.day.ago # => 2013-08-09 00:00:00 -0300 Date.today.beginning_of_month # => Thu, 01 Aug 2013

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require "active_support/all" 1.day.ago # => 2013-08-09 00:00:00 -0300 Date.today.beginning_of_month # => Thu, 01 Aug 2013 [1, 2, 3].sum # => 6

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metaprogramming

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klass = Class.new do end Person = klass Person.name # => Person

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klass = Class.new do end Person = klass Person.name # => Person person = Person.new

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klass = Class.new do ["say", "scream"].each do |method| define_method method do |message| "#{method}ing: #{message}" end end end Person = klass Person.name # => Person person = Person.new puts person.say "ruby" # => saying: ruby puts person.scream "ruby <3" # => screaming: ruby <3

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instalação

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até quando você vai ficar triste?

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obrigado :)