magicp4.rb

module Magic 
  def self.respond_to?(method_sym, include_private = false)
    if method_sym.to_s =~ /^contains_(.*)/ 
      true
    else
      super
    end
  end
 
  def self.method_missing(m, *args, &block)  
    split_call = m.to_s.split('_')
    if split_call[0] == "contains"
      type_find(split_call[1].gsub("?", ''),args[0])
    end    
  end 
   
 
  def self.type_find(klass, array)
    array.any?{|item| item.class == to_class(klass.capitalize)  } 
  end
 
  def self.to_class(str)
    Object.const_get(str)
  end  
end 
 
#-----tests----
 
p Magic.contains_string?([1,2,7,'hello',95,3])
p Magic.contains_fixnum?(['a',4,'c','z'])
p Magic.contains_symbol(['hello', 4, Array.new, :cat])