From: "Iñaki Baz Castillo" <ibc@...>
Date: 2008-05-08T22:31:30+09:00
Subject: Re: Why can't I redefine "<<" method to allow two parameters?

2008/5/8, Jens Wille <jens.wille@uni-koeln.de>:
> Jason Roelofs [2008-05-08 14:50]:
>
> > On Thu, May 8, 2008 at 8:42 AM, Iñaki Baz Castillo <ibc@aliax.net> wrote:
> the point is that you can't call an operator with multiple
>  arguments. maybe something like this will suit you (note that you
>  don't need to alias if you inherit from Array):
>
>   class MyArray < Array
>     def <<(*a)
>       a = [*(a=*a)]  # a.to_a.flatten_once ;-)
>       raise ArgumentError, "wrong number of arguments (#{a.size} for
>  2)" if a.size != 2
>
>       super a.join(': ')
>
>     end
>   end
>
>   my_array = MyArray.new
>
>   my_array << ['Header1', 'Value1']  # => ["Header1: Value1"]
>   my_array.<<('Header2', 'Value2')   # => ["Header1: Value1",
>  "Header2: Value2"]


Thanks to all. Finally I'll just create a "add" method that will call
internally to << method using appropiate syntax:
  self.<< (k, v)


Thanks.


-- 
Iñaki Baz Castillo
<ibc@aliax.net>