From: Robert Klemme <shortcutter@...>
Date: 2007-07-10T18:42:36+09:00
Subject: Re: Repacking an array of arrays

2007/7/10, SonOfLilit <sonoflilit@gmail.com>:
> a = [[1, 4, 7, 10, 13], [2, 5, 8, 11, 14], [3, 6, 9, 12, 15]]
>
> a0 = a.shift
>
> p a0.zip(*a)

This outputs

[[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12], [13, 14, 15]]

Which is not what the OP wanted according to his first posting (see
quote below). Still it's a nice approach!

> to grok this, ri Array#zip
>
> On 7/10/07, Kaps Lok <jocubeit@gmail.com> wrote:
> > Is there an elegant (maybe a one-liner) for repacking:
> >
> > [[1, 4, 7, 10, 13], [2, 5, 8, 11, 14], [3, 6, 9, 12, 15]]
> >
> > to?
> >
> > [[1, 4, 7], [10, 13, 2], [5, 8, 11], [14, 3, 6], [9, 12, 15]]
> >
> > So rather than having 3 arrays each with 5 elements, I get five arrays
> > of 3 elements each...
> >
> > the only way I can see to do this is by looping the array, and creating
> > new arrays.
> >
> > Any help would be much appreciated.

Kind regards

robert