lukin-io

module MyModule
  def self.included(base)
    puts base
    base.instance_variable_set :@my_instance_variable, {}
    base.extend ClassMethods
  end

  module ClassMethods
    def my_instance_variable
      # self is ClassA here, so we need to call superclass

lukin-io

recursive_array = lambda do |array, result|
	array.each do |item|
  	result << item[:name] if item[:name]
  	recursive_array.call(item[:children], result) if item[:children]
  end
  result
end

a = [
  {name: "Folder 1",

lukin-io

class Gladiator
  attr_accessor :name, :rank, :height, :weight

  def initialize
    yield(self)
  end
end

spartak = Gladiator.new do |his|
  his.name = "spartak"