From: Robert Klemme <shortcutter@...>
Date: 2013-02-19T19:03:01+09:00
Subject: Re: Select "columns" from multidimensional array?

On Tue, Feb 19, 2013 at 10:51 AM, Joel Pearson <lists@ruby-forum.com> wrote:
> Using the filter method on my previous attempt would return a copy of
> the object containing only the required data. I was hoping for something
> similar with this so I can split into multiple sections using filter
> logic but still keep the original if required, but I'm not sure how to
> do this. This is the kind of thing I'd probably want to use:
>
> m = #Main matrix
> n = m.filter args #Creates Subset without altering "m"
> m.filter! other_args #Alters its own data

That's another reasonable way to do it.  Similar to how String#gsub
and String#gsub! go about this.  It entirely depends on your use case.
 If you would want to modify the original data through a view then of
course you need a similar approach as with Row and Column.

> A class method sounds like a good idea. I'll have to play with that and
> see what I can come up with...

Cheers

robert


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