Idiomatic object creation in ruby

Question

In ruby, I often find myself writing the following:

class Foo
  def initialize(bar, baz)
    @bar = bar
    @baz = baz
  end

  << more stuff >>
         


        

Answer 1

I asked a duplicate question, and suggested my own answer there, expecting for a better one, but a satisfactory one did not appear. I will post my own one.

Define a class method like the following along the spirit of attr_accessor, attr_reader, attr_writer methods.

class Class
    def attr_constructor *vars
        define_method("initialize") do |*vals|
            vars.zip(vals){|var, val| instance_variable_set("@#{var}", val)}
        end
    end
end

Then, you can use it like this:

class Foo
    attr_constructor :foo, :bar, :buz
end

p Foo.new('a', 'b', 'c')      # => #
p Foo.new('a', 'b', 'c', 'd') # => #
p Foo.new('a', 'b')           # => #