From: lasitha <lasitha.ranatunga@...>
Date: 2009-03-08T23:59:07+09:00
Subject: Re: how to un-ragged a 2D array?

On Sun, Mar 8, 2009 at 3:43 AM, Phlip <phlip2005@gmail.com> wrote:
> Ktx! Now, on to Round Two!
>
> What if the array were even _more_ ragged??
>
>   [   1     ,
>     [ 2, 3 ],
>       4     ,
>     [ 5, 6 ],
>       7     ,
>       8      ]
>
> <snip>
>
> In my case, the user-programmer can leave the second 1, 4, 7, & 8 out, as a
> convenience, but the algorithm wants this...
>
>   [ [ 1, 1 ],
>     [ 2, 3 ],
>     [ 4, 4 ],
>     [ 5, 6 ],
>     [ 7, 7 ],
>     [ 8, 8 ] ]
>

needs.map {|x, y| [x, y ||= x] }

Solidarity,
lasitha.