Re: Nice-to-have class methods

[Tom Browder]

On Wed, Jan 27, 2016 at 7:09 AM, Elizabeth Mattijsen  wrote:
>> On 27 Jan 2016, at 14:00, Tom Browder  wrote:
>>
>> Given so many handy methods for built-in classes, it would be nice to have a 
>> couple of more for some, for instance:
>>
>> IO:Path.stemname
>>   Like basename except any suffix is removed
>
> Seems like a nice idea.

I've found the pertinent bits and added necessary code (no docs or
tests yet) in the Rakudo source, and I've filed a feature request via
e-mail to .  I've also made a pull request.

But how does such a feature request really work when the Perl 6 spec,
as I understand it, is frozen for now.  Isn't a new method a spec
change?

Best regards,

-Tom

RE: Nice-to-have class methods

[Paul Marquess]

From: Tom Browder [mailto:tom.brow...@gmail.com] 

> 

> Given so many handy methods for built-in classes, it would be nice to have a 
> couple of more for some, for instance:

> 

> IO:Path.stemname

>   Like basename except any suffix is removed

> 

> IO::Handle.say (or println)

>   Like print except with an added newline.

 

A way to tell if an IO-type handle (so socket, filehandle, pipe etc) is 
seekable.

 

[Apologies in advance if it already exists & I’ve missed it]

 

Paul

Re: Nice-to-have class methods

[Tom Browder]

On Wed, Jan 27, 2016 at 7:09 AM, Elizabeth Mattijsen  wrote:
>> On 27 Jan 2016, at 14:00, Tom Browder  wrote:
>>
>> Given so many handy methods for built-in classes, it would be nice to have a 
>> couple of more for some, for instance:
...
>> IO::Handle.say (or println)
>>   Like print except with an added newline.
>
> IO::Handle already has a .say ?

Oops, the docs confused me.  say is only mentioned as a role sub while
print is mentioned as both method and role sub for IO::Handle.  It
works fine, though.

Thanks, Liz.

Cheers!

-Tom

P.S.  Do you or any other Perl 6 developers plan to attend the
recently-announced YAPC::NA in Orlando, Florida, in June?  I hope so
because I plan to attend only if there are significant Perl 6 events.

Re: Nice-to-have class methods

[Peter Pentchev]

On Wed, Jan 27, 2016 at 02:14:17PM +, Philip Hazelden wrote:
> On Wed, Jan 27, 2016 at 1:43 PM Peter Pentchev  wrote:
> 
> > On Wed, Jan 27, 2016 at 07:00:11AM -0600, Tom Browder wrote:
> > > Given so many handy methods for built-in classes, it would be nice to
> > have
> > > a couple of more for some, for instance:
> > >
> > > IO:Path.stemname
> > >   Like basename except any suffix is removed
> >
> > Hmm, this sounds like a nice idea on a first glance, but then again,
> > can you tell me exactly what situations would that be useful for?
> > Is it for compressed files (e.g. .zip vs .tar.gz) or MS-DOS/Windows
> > executables (.com, .exe, .bat), or something else?
> > When I strip filename extensions, I usually know exactly what extensions
> > I want to strip - e.g. ".conf" or ".pl" or something like that.  There
> > are very, very rare cases when any extension should be stripped - and
> > there's also a problem with that.
[snip my explanation of a problem with removing everything after the first dot]
> 
> For a "convert files to $format" thing, you'd want to replace the
> extension. You don't need to specify the previous extension(s) if it's a
> quick-and-dirty thing where you know everything passed to it will be
> acceptable; and you don't want to, if you're passing out to some other
> service which can handle various input formats. (e.g. a wrapper around
> ffmpeg or ImageMagick or something - they can handle a lot of filetypes
> with a lot of likely extensions.)

Right, so that would probably mean that you need a function that removes
the *last* extension; that might indeed make sense, although it's
trivial to implement as a regular expression substitution (but also beware
the case of a filename with no dots at all).

G'luck,
Peter

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Re: Nice-to-have class methods

[Elizabeth Mattijsen]

> On 27 Jan 2016, at 14:00, Tom Browder  wrote:
> 
> Given so many handy methods for built-in classes, it would be nice to have a 
> couple of more for some, for instance:
> 
> IO:Path.stemname
>   Like basename except any suffix is removed

Seems like a nice idea.


> IO::Handle.say (or println)
>   Like print except with an added newline.

IO::Handle already has a .say ?

$ 6 '$*OUT.say("hello world")'
hello world


Liz

Re: Nice-to-have class methods

[Peter Pentchev]

On Wed, Jan 27, 2016 at 07:00:11AM -0600, Tom Browder wrote:
> Given so many handy methods for built-in classes, it would be nice to have
> a couple of more for some, for instance:
> 
> IO:Path.stemname
>   Like basename except any suffix is removed

Hmm, this sounds like a nice idea on a first glance, but then again,
can you tell me exactly what situations would that be useful for?
Is it for compressed files (e.g. .zip vs .tar.gz) or MS-DOS/Windows
executables (.com, .exe, .bat), or something else?
When I strip filename extensions, I usually know exactly what extensions
I want to strip - e.g. ".conf" or ".pl" or something like that.  There
are very, very rare cases when any extension should be stripped - and
there's also a problem with that.

You see, I was kind of surprised many years ago when I first met
somebody who routinely used a dot as a word separator in filenames -
a file that I would've called "yearly-report.txt" or "YearlyReport.txt",
he would call "yearly.report.txt".  Over the years after that, I
stumbled into many other people who do that - not a majority, certainly,
but, well, many people indeed.

So a function that would remove *any* filename extensions, that is,
anything after and including the first dot, would produce really weird
results if applied to filenames created by such people.

G'luck,
Peter

-- 
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Re: Nice-to-have class methods

[Brandon Allbery]

On Wed, Jan 27, 2016 at 9:50 AM, Peter Pentchev  wrote:

> Right, so that would probably mean that you need a function that removes
> the *last* extension; that might indeed make sense, although it's
> trivial to implement as a regular expression substitution (but also beware
> the case of a filename with no dots at all).
>

Or starting with a dot (Unix), or even all-dots (someone called it on . or
.. for some reason).

-- 
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allber...@gmail.com  ballb...@sinenomine.net
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