Created
October 25, 2009 15:01
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Observer em Ruby
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module Subject | |
def initialize | |
@observers=[] | |
end | |
def add_observer(&observer) | |
@observers << observer | |
end | |
def delete_observer(observer) | |
@observers.delete(observer) | |
end | |
def notify_observers | |
@observers.each do |observer| | |
observer.call(self) | |
end | |
end | |
end | |
class Funcionario | |
include Subject | |
attr_accessor :nome, :titulo, :salario | |
def initialize( nome, titulo, salario ) | |
super() | |
@nome = nome | |
@titulo = titulo | |
@salario = salario | |
end | |
def salario=(novo_salario) | |
@salario = novo_salario | |
notify_observers | |
end | |
end | |
jose = Funcionario.new('jose', 'Crane Operator', 30000) | |
jose.add_observer do |funcionario| | |
puts ("Aumentando salário do #{funcionario.nome}!") | |
puts("Seu novo salário é #{funcionario.salario}!") | |
end |
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