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Re: Working with files wish list
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From:
Timothy S. Nelson
Date:
December 16, 2008 01:59
Subject:
Re: Working with files wish list
Message ID:
alpine.LRH.1.10.0812162049520.12631@gwalcmai.nelson.org.au
On Tue, 16 Dec 2008, jason switzer wrote:
>> You can already easily mix it in using 'does':
>>
>> $fstab = open('/etc/fstab', :r);
>> $fstab does WhitespaceTrim;
>>
>> I don't think it's really necessary to include that into open(),
>> though it might be useful syntactic sugar.
>
> I haven't spent the time to understand mix-ins yet, but this does look like
> a feasible (clean) idea. However, how do you specify one/more filters? For
> example, say you want to :rw a file. How can you provide an input filter and
> an output filter (or multiples of either)? Can you layer filters if done
> with mix-ins? If so, how do you specify direction?
I've had somewhat related ideas in the past, but they always involved
feed operators somehow. I don't think I've got enough of a grip on things to
suggest specifics, but I thought I'd throw the idea into the mix.
Also, if the wishlist covers filesystems as well as files (ie.
opendir-type stuff), my wishlist involves having general tree-manipulation
stuff that works with filesystems just as well as with XML; we could use
XPath-like globs on filesystems, which would completely replace eg.
File::Find, among other things. So you could ask for
"/path/to/directory/child::*", which would get you the children, but not the
parent ".." or the self ".". I've actually started code in this direction
(ie. of a role, not the IO side of things), but stopped while waiting on the
further development of Rakudo (ie. operator overloading).
Anyway, just some thoughts thrown into the mix.
:)
---------------------------------------------------------------------
| Name: Tim Nelson | Because the Creator is, |
| E-mail: wayland@wayland.id.au | I am |
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