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Re: Net::DNS::Nameserver

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On 2019-04-26 21:25, Cindy Sue Causey wrote:
> On 4/26/19, tomas@tuxteam.de <tomas@tuxteam.de> wrote:
>> On Fri, Apr 26, 2019 at 12:19:09PM +0100, mick crane wrote:
>> 
>>> can somebody explain generally what this scheme of things with the
>>> dots has to do with ?
>>> seen this in perl as the kind of hierarchy of modules but how is
>>> this to do with the OS ?
>>> 
>>> ~$ apropos nameserver
>>> Net::DNS::Nameserver (3pm) - DNS server class
>> 
>> You mean those double colons ('::')?
>> 
>> If yes: those are just separators for the Perl module namespace, which
>> conceptually is a hierarchy. At the (right) end you can put some 
>> object
>> (function, variable) living in that module's [1] namespace.
>> 
>> Those are just a device to subdivide the namespace and to organize
>> file system "places" [1] -- they have no intrinsic "meaning" to perl
>> (i.e. the language itself has no notion of "Net" or "Net::DNS" -- just
>> of "Net::DNS::Nameserver").
>> 
>> Cf "perldoc -f require" for the full thing :-)
>> 
>> [1] In Perl parlance, it is a "package".
>> [2] Typically you'll find the package code in Net/DNS/Nameserver.pm
>>    under a suitable "module root", e.g. /usr/share/perl5. The whole
>>    list of roots is in the special array variable @INC.
> 
> 
> I just happened to start noticing the same format being used within
> "apt-cache show" query feedback, too. Took a second to find a good
> example. This is for "openshot" (video editor):
> 
> Tag: implemented-in::python, interface::graphical, interface::x11,
>  role::program, scope::application, use::editing, works-with::audio,
>  works-with::video, x11::application
> 
> I THOUGHT I had searched "apt-cache" using those tags when I first
> noticed them. It's not working that way now. It must have been that
> the description's author had used the same categories as keywords in
> their product description.
> 
> Am "feeling like" I've seen something where we could search by tags.
> Sounds like a handy place for something like that to work.
> 
> Those tags would save at least a little bit on the false hits if you
> were able to search for any packages with a developer expressed "use"
> of "editing". Then you narrow that search to more specific usage needs
> by seeking anything that "works with (consumes) audio (files)" which
> is, in fact, something that has been a question on this list at some
> point. Seems like that "interface" applied to that remembered thread
> because the User was wanting something... command line. :D
> 
> That X11 tag, my memory's saying it feels like there was a question
> where a User was seeking something that needed to specifically be
> X11-friendly, too..
> 
> There's something to be said for the wide-open wing-it method, though.
> Pick any keyword, and see what new find bubbles to the top. I searched
> on "dragonfly" the other day while waiting for them to show back up
> and start chasing water sprays out in the yard this Spring. :)
> 
> Cindy :)

I did wonder if was some scheme I was unaware of.
I noticed a couple of weeks ago somebody used these "::" between words 
to identify something.
Like in apt you have
/var/lib/apt/lists/security.debian.org_debian-security_dists_buster_updates_main_source_Sources
made me think that these dots was some way of identifying a thing so 
that everything is the same over the whole wide world .
Or something like that.

mick

-- 
Key ID    4BFEBB31

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Net::DNS::Nameserver mick crane <mick.crane@gmail.com> - 2019-04-26 13:20 +0200
  Re: Net::DNS::Nameserver Alberto Luaces <aluaces@udc.es> - 2019-04-26 13:40 +0200
    Re: Net::DNS::Nameserver mick crane <mick.crane@gmail.com> - 2019-04-26 13:50 +0200
  Re: Net::DNS::Nameserver <tomas@tuxteam.de> - 2019-04-26 13:50 +0200
    Re: Net::DNS::Nameserver mick crane <mick.crane@gmail.com> - 2019-04-26 14:20 +0200
      Re: Net::DNS::Nameserver Joe <joe@jretrading.com> - 2019-04-26 14:50 +0200
    Re: Net::DNS::Nameserver Cindy Sue Causey <butterflybytes@gmail.com> - 2019-04-26 22:30 +0200
      Re: Net::DNS::Nameserver mick crane <mick.crane@gmail.com> - 2019-04-27 00:20 +0200
        Re: Net::DNS::Nameserver Erik Christiansen <dvalin@internode.on.net> - 2019-04-27 04:10 +0200
          Re: Net::DNS::Nameserver <tomas@tuxteam.de> - 2019-04-27 09:00 +0200

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