Symbol#to_proc

Symbol#to_proc.rb

#ProcBlok変換復習
3.times{p 'hoge'}

proc = Proc.new{ p 'hoge'}

3.times{proc.call}

3.times(&proc)

def my_method(&hoge)
  hoge.call('hoge','hoge')
end

my_method{ |a, b| p [a, b] }

#Symbol#to_proc呼び出し
class Myclass

  attr_accessor :id

  def initialize
    @id = Time.now.to_i
  end
end

data1 = Myclass.new
data2 = Myclass.new
data3 = Myclass.new

@data = [data1, data2, data3]

p @data.map{|data| p data.id }
p @data.map(&:id)