Closure memeonization in ruby, It's magical

SomeRubyCode.rb

# Closure memeonization in ruby
# It's magical

Role::TYPES.each do |key, name|
  puts "before nil assignment #{ivar.object_id}" rescue "------"
  ivar = nil
  puts ivar.object_id, ivar

  define_method(:"#{key}_role") do
    puts "Inside Role: #{ivar.object_id}"
    ivar ||= Role.find_or_create_by(name: name, is_active: true)
    puts "Inside Role (after): #{ivar.object_id}"
  end

  puts "================================"
end