From: "David A. Black" <dblack@...>
Date: 2010-05-17T19:20:31+09:00
Subject: Re: Real life use of each_cons? (... follow up)

Hi --

On Mon, 17 May 2010, Jakub wrote:

> Hi there!
>
> (following up the discussion from last year)
>
> This method actually made my life a lot easier when fitting some data
> to a table. I had tens of pictures and wanted to show them in rows -
> three columns each.
>
> data.each_cons(3) do |column|
>  column.each do |picture|
>    show picture
>  end
> end
>
> I was playing with indices, modulos and stuff. After refactoring with
> each_cons, the code looked much cleaner.

Are you sure you don't want each_slice rather than each_cons? With
each_cons you'll get repetition:

   array = [1,2,3,4,5,6,7,8,9]
   array.each_cons(3) {|c| p c }

     [1, 2, 3]
     [2, 3, 4]
     [3, 4, 5]
     etc.


David

-- 
David A. Black, Senior Developer, Cyrus Innovation Inc.

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