Ruby: set attr_accessor from params hash

class Foo
  attr_accessor :test
  def self.new_with_params(params={})
    f = Foo.new
    params.each do |param|
      # if method exists send value
      f.send(param[0].to_s + "=",param[1]) if f.respond_to?(param[0].to_s) 
  
    end
    f
  end
end

# Usage

bar = Foo.new_with_params(:test => 1)
bar.test # puts 1