rosylilly

class Object
  def method_missing( _method, *arg)
    _method = _method.to_sym
    if (_method.to_s[_method.to_s.size - 1] == ?=) && ( arg[0].class == Proc)
      target = (self.class == Class ? self : self.class)
      target.class_eval do
        define_method( _method.to_s[0, _method.to_s.size - 1].to_sym, arg[0].binding)
      end
    else
      raise NoMethodError, "undefined method `#{_method}' for #{self.inspect}:#{self.class}", caller(1)

rosylilly

class CS5
  Pseudo_Classes = [
  /root/,
  /nth\-child\((\d+n\+\d+|\d+|odd|even)\)/,
  /nth\-last\-child\((\d+n\+\d+|\d+|odd|even)\)/,
  /nth\-of\-type\((\d+n\+\d+|\d+|odd|even)\)/,
  /nth\-last\-of\-type\((\d+n\+\d+|\d+|odd|even)\)/,
  /first\-child/,
  /last\-child/,
  /first\-of\-type/,