Half implementation of OpenStruct

openstruct.rb

class OpenStruct < BasicObject
  def initialize(hash)
    @struct = ::Struct.new(*hash.keys.map { |k| k.to_sym })
    @struct = @struct.new(*hash.values)
  end

  def ==(other)
    to_h == other.to_h
  end

  def method_missing(method_name, *args, &block)
    if method_name.to_s.index('=') && [email protected]_to?(method_name)
      vals = @struct.to_h.values
      getter_name = method_name.to_s.gsub('=', '')
      getters = ((@struct.to_h.keys.map { |k| k.to_sym }) + [getter_name.to_sym])
      @struct = ::Struct.new(*getters)
      @struct = @struct.new(*vals)
    end
    @struct.send(method_name, *args, &block)
  end

  def respond_to_missing?(method_name, include_private = false)
    return true if @struct.respond_to?(method_name)
    return true if super
  end
end

v = OpenStruct.new(:one => 'two')
p = OpenStruct.new(:one => 'two')
puts v
puts v == p

Published as the gem motion-ostruct. Repo: https://github.com/hboon/motion-ostruct

Thanks!