generate initializers that just set instance variables without wasting lines

initializer_macro.rb

#!/usr/bin/env ruby1.9 -ryaml
# encoding: UTF-8

class Class
  def initialize_with_attributes(*attrs)
    attr_reader *attrs
    define_method(:initialize) do |*args|
      attrs.zip(args).each { |attr, v| instance_variable_set("@#{attr}", v) }
    end
  end
end

class Foobar
  initialize_with_attributes :foo, :bar
end

fb = Foobar.new('afoo', 'abar')

y [fb.foo, fb.bar]

### Output:
# ---
# - afoo
# - abar


# class Foobar without initialize_with_attributes:

class Foobar
  attr_reader :foo, :bar

  def initialize(foo = nil, bar = nil)
    @foo, @bar = foo, bar
  end
end