From: Robert Klemme <shortcutter@...>
Date: 2013-02-19T18:35:40+09:00
Subject: Re: Select "columns" from multidimensional array?

On Tue, Feb 19, 2013 at 12:47 AM, Joel Pearson <lists@ruby-forum.com> wrote:

> After more face-to-keyboard action, I came up with a working filter
> system. it modifies self at the moment rather than returning a copy,
> which is something I'll have to look intosince I'm not sure I want that
> to be the default behaviour.

You cannot change self.  Or do you mean you change matrix contents?
IMHO that's a bad idea since you basically only want a filtered /view/
on the data.

> I've added a index option for row and column, and also added row and
> column methods to String. Since those methods didn't exist before, and
> you gave me the idea of modifying an existing class (Regexp), I thought
> this would be quite a useful way to get the index values straight from
> the hash keys.

IMHO that is not a good idea.  The method I suggested for Regex is of
general use because matching is what Regex instances are for.  But the
extraction of a row or column identifier is closely bound to your
class's logic.  So if at all I'd put it as a class method in class
RubyExcel.

> ...
> I'm too tired for rational thought now so I'd better call it a day
> before I find myself thinking that adding ASCII art comments in the
> shape of ponies and rainbows would improve the code...

:-)

Frankly, I don't have the time right now to take a closer look.  I
hope I can followup at a later point in time.

Kind regards

robert


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