From: "David A. Black" <dblack@...>
Date: 2005-10-04T00:38:53+09:00
Subject: Re: How does this work? def[](own_arg_1, own_arg_2)

Hi --

On Tue, 4 Oct 2005, Krekna Mektek wrote:

> Hi,
>
> While reading some code, which tells that one can define a new
> indexing operator, some of my neurons triggered a question. When
> evaluating this code:
>
> class Song
>  def[](from_time, to_time)
>    result = Song.new(self.title + " [extract]",
>                 self.artist
>                 to_time - from_time)
>    result.set_start_time(from_time)
>    result
>  end
> end
>
> song[0,15].play
>
> I was thinking: when one usually defines a method, the arguments are
> placed after the method name, which is '[]' here, or so I thought.
> That would be song[](0,15).play

Actually the full method-call version would be:

   song.[](0,15).play  # note the first dot

> How come it works 'just' by putting the argument between the brackets?

Because Matz is nice and gave us some nice syntactic sugar :-)


David

-- 
David A. Black
dblack@wobblini.net