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Difference between blocks, procs and lambdas. | |
Blocks are not objects and can't be manipulates as objects. With procs and lambdas is possible to | |
create objects that represents a block. | |
Procs and lambdas have the 'call' method, that executes the block code associated in their creation. | |
A proc behaves like a block, different of lambdas that behaves like a method. For that reason, | |
lambdas need to receive the exact number of parameters defined in your declaration. |
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ramo_de_atividade_1 | |
id: 1 | |
nome: Alimentos e Bebidas | |
ramo_de_atividade_2 | |
id: 2 | |
nome: Arte e Antiguidades | |
ramo_de_atividade_3 | |
id: 3 |
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# encoding: utf-8 | |
# ramos_de_atividade.rb | |
nomes = File.readlines("ramos_de_atividade.txt") | |
File.open("ramos_de_atividade.yaml", "w") do |f| | |
nomes.each_with_index do |nome, i| | |
f.puts "ramo_de_atividade_#{i+1}" | |
f.puts " id: #{i+1}" | |
f.puts " nome: #{nome}\n" |
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#!/usr/bin/env ruby | |
# encoding: utf-8 | |
# listar_contatos.rb | |
raise ArgumentError, "=> Quantidade de argumentos incorreta. Exemplo de uso: ruby listar_contatos.rb root minhasenha" if ARGV.size != 2 | |
mysql_user, mysql_pass = ARGV | |
def criar_array(resultado) | |
resultado.split("\n").drop(1) | |
end |
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class Saudacao | |
def initialize(name) | |
@name = name | |
end | |
def saudar | |
"Bem vindo, #{@name}!" | |
end | |
end |
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greet { puts "Hello" } |
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class Dog | |
def initialize(name, breed) | |
@name, @breed = name, breed | |
end | |
def bark | |
puts "#{@name}: Au, au, au!" | |
end | |
def sleep |
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class Dog | |
end |
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class Dog | |
attr_accessor :name, :breed | |
def initialize(name, breed) | |
@name, @breed = name, breed | |
end | |
# Os demais métodos foram omitidos | |
end |
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class Dog | |
def initialize(name, breed) | |
@name, @breed = name, breed | |
end | |
def bark | |
puts "#{@name}: Au, au, au!" | |
end | |
def sleep |
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