> If you get a crash using it, I suspect you made another mistake somewhere.
Possibly a compiler version difference? A perl6 -v output might be
worth including.
Do you have the printer set up in CUPS? (Common Unix Printing System.)
See "man cups".
Applications shouldn't normally be writing to explicit device IDs.
On 3/10/19, ToddAndMargo via perl6-users wrote:
> Hi All,
>
> How do I output data to a printer on /dev/lp0 (LPT1)?
>
> Many thanks,
> -T
>
ication's.
On 3/10/19, ToddAndMargo via perl6-users wrote:
> >> Hi All,
> >>
> >> How do I output data to a printer on /dev/lp0 (LPT1)?
> >>
> >> Many thanks,
> >> -T
> >>
>
> On 3/10/19 11:28 AM, Par
I tried to report a failure to rakudobug, which generated the
following report from the mailer:
-
---
Date: Fri, 10 May 2019 15:59:32 -0700 (PDT)
** Message not delivered **
Your message couldn't be delivered to rakudo...@per
Is there a convenient way to download the Perl 6 specification as one
file, rather than having to download each topic separately?
On 6/21/19, Brad Gilbert wrote:
> The specification is the test suite.
That is true, but as a guide to learning the language, it has its limitations.
> I believe you are asking for downloading the documentation as one file.
> On docs.perl6.org there is a link for viewing the entire thing as a
>
Hmm, downloaded to pdf, but at 1730 pages, maybe I'd better rethink
the printing. :-)*
I've been fiddling with multi-line comments and the bounding
characters. Naturally-paired characters e.g. #`(...) #`[...] #`{...}
all work well, but with other boundary characters like #`@@ or
#`!! produce odd, displaced, diagnostic messages. Reproducing them
is so easy, I'll leave it as
"https://rakudo.org/files/rakudo"; still appears to be broken; it
generates a 500 page.
Attempting to go there from the "compiler-only" button on the download
page does the same thing. I've tried to track down the problem and the
source code for the Web page, but got rather lost (I don't actually
The current version of Rakudo* is 2019.03, which makes it 5 months old.
Is there likely to be an update soon? (The underlying compiler seems
to have had a few fixes.)
(No pressure, I just want to stay as up-to-date as possible.)
"5" is a version number of Perl. To run it, $/usr/bin/perl "6" is part
of the name of Perl6.
To run it, $/usr/bin/perl6.
With the production version of Perl incremented by 2 every year, it's
still about 35 years before the version gets to an inconvenient 3
digits. (Will there really be enough wort
Some books:
"Think Perl 6"http://shop.oreilly.com/product/0636920065883.do
"Learning Perl 6"http://shop.oreilly.com/product/0636920062776.do
"Perl 6 At a Glance" https://perl6.online/perl6-at-a-glance/ (which
Andrew did mention)
On 8/24/19, William Michels via perl6-users w
https://github.com/perl6/doc/issues/2387
Coke closed the issue , but for me, "p6doc build" is still broken. It
looks as though whatever was "fixed in HEAD" hasn't made it into
Rakudo*. Could we have details (or at least an issue number) to help
implement the fix, please?
CatHandle? Is that an alias for "tail"? :-)*
On 10/22/19, Marcel Timmerman wrote:
> On 10/22/19 1:05 PM, Marcel Timmerman wrote:
>> On 10/20/19 11:38 PM, Joseph Brenner wrote:
>>> I was just thinking about the case of processing a large file in
>>> chunks of an arbitrary size (where "lines" or "
After a few difficulties caused by subtly different paths and version
identification (like -n vs .n for sub-version ids) the download and
installation appears to have worked, but trying the REPL produced the
following error message:
"I ran into a problem while trying to set up Linenoise: Failed to
generated by zef. The warning
> already tells you which module the filename pertains to (Linenoise),
> so I guess I'm not understanding the problem. You can locate the your
> Linenoise module using the command below, and work from there.
>
>> mbook:~ homedir$ zef locate Linen
When I report a problem, I try to supply as complete a picture as
possible, without imposing my filter on the data. So many times I've
had a vital clue omitted by someone who "didn't think that X was
important".
With so many parties involved, it's not surprising that errors reveal
issues entirely
Raku is the product of collaboration by many people. Some of these are
well known, but there are many parts of the ecosystem whose mavens are
anonymous or obscure. When a problem arises, it would be nice to be
able to direct them to someone knowledgeable, rather than essentially
yelling them in pub
What do the official tests for this show?
On 11/16/19, Joseph Brenner wrote:
> William Michelswrote:
>
>> I went over this with Joe as well, and I was
>> equally confused.
>
> Part of our trouble was we were playing around with the
> routine form of comb (rather than the Str method), whic
It has been said that any sound the human voice can utter is rude in
some language.
It is also rather obvious that people who acquire second and
subsequent languages informally tend to learn a very high proportion
of "taboo" expressions. (Possibly because in many cases their
principal source is mi
Should users of Raku be termed "Rakuuns"? :-)*
Who initiated the project, and why?
What deficiencies in existing languages are they trying to address?
The belief that Yet Another Programming Language is the answer to the
world's problems is a persistent, but (IMNSHO) a naive one.
On 12/8/19, Andrew Shitov wrote:
> Let’s not hide the fact tha
I agree with you. Improving an existing one is different, even if
fixing the original does give turn out to produce what is effectively
a new one.
Addressing a completely new class of problem would also be different,
but that would be moving up the stack.
That looks like a great recommendation.
On 12/9/19, Mike Stok wrote:
>
>> On Dec 9, 2019, at 10:24 AM, Curt Tilmes wrote:
>>
>> On Mon, Dec 9, 2019 at 10:07 AM ToddAndMargo via perl6-users
>> mailto:perl6-us...@perl.org>> wrote:
>> On 2019-12-09 02:00, JJ Merelo wrote:
>> > Other than that, it's
With the name change to Raku, has anyone considered a naming suffix
policy for modules? I don't have a problem with .pm6, and I don't
want to cause an outbreak of bikeshedding, but some might consider it
inconsistent.
As an aside, I deplore the practice of identifying the language of a
directly e
Since Ruby was designed to fix what Matz considered mis-features of
Perl 5, and the motivation for Rakudo was much the same, it's hardly
surprising they're similar.
One feature of any Open Source product to consider when investing any
effort in it is the supporting community. Though Ruby was consi
> we use ruby for Biological data analysis. I wish perl6 should have got that
> capability.
Would you like to give us a sample problem,, to see if someone can
show a potential solution?
I've managed to download 2020.01, and run it with an explicit path,
but the directory structure that my script used to follow, is broken
in some way. (I'll investigate further, to see if I can spot the
change, but a required directory tree might help me find it, if you
could provide one.)
A fair
it's going to take careful untangling, locating every
reference to files before renaming them.
On 3/3/20, Patrick Spek wrote:
> On Tue, 3 Mar 2020 16:41:47 -0500
> Parrot Raiser <1parr...@gmail.com> wrote:
>
>> I've managed to download 2020.01, and run it with an exp
Working with p.spek p.s...@tyil.nl on a revised Rakudo Star we
encountered a problem with the Configure step; it might be worthwhile
contacting him to coordinate any changes.
On 5/14/20, Will Coleda wrote:
> I think it's out of date, yes.
>
> Need a "make install" to install the binaries (by defa
I suspect that "methods" were originally distinguished from
"subroutines" because it made the rain-dance about the new cure for
all civilisation's ills and the heartbreak of psoriasis,
Object-Oriented Programming, look more impressive. After one has seen
a few programming religions launched, the s
Create an updated version, perhaps with an "rk" prefix, (preserving
any text alignment, since "p6" and "rk" are the same length), then
change the "pk" version simply to invoke the "rk"?
Existing code should continue to work, albeit nanoseconds slower,
while new code can be culturally consistent.
There is potentially a place for Raku in education, as a language that
can evolve from simple expressions in the REPL to one-liners, basic
scripts and through to complete CS courses with the various
programming paradigms (procedural, O-O, functional) and into language
design with grammars.
The cha
It seems to me that arbitrarily changing the precedence of a function
would produce a horrible maintenance nightmare.
It would mean recognising what had been done, interpreting the first
example found in a different way than any other code, then tracking
down any other place the trick had been used
I just happened to look at the raku.org and raskudo.org download
pages, and noticed that both quote 2020.01 as the most recent
versions.
Patrick Spek's dist.tyil.nl/raku/rakudo-star/ has both 2020.03 and
2020.05 for download following that.
Should the sites be synchronised, preferably with a mech
Wouldn't the responsibility be on the web pages to keep up-to-date?
That would be more a matter of agreement on the place to watch?
Perhaps with a grammar?
On 7/16/20, Tom Browder wrote:
> An opportunity for Raku golfers to show off Raku on the Debian users list.
>
> Best regards,
>
> -Tom
>
> -- Forwarded message -
> From: Albretch Mueller
> Date: Tue, Jul 14, 2020 at 07:52
> Subject: delimiters with more th
Can anyone point me at examples of pod6 in use? I'm trying to relate
the syntax shown in https://docs.raku.org/language/pod to actual
results. Concise would be nice, tutorial even better.
com/Raku/doc/tree/master/doc directory.
>
> Richard
>
> On 21/07/2020 15:40, Parrot Raiser wrote:
>> Can anyone point me at examples of pod6 in use? I'm trying to relate
>> the syntax shown in https://docs.raku.org/language/pod to actual
>> results. Concise would be nice, tutorial even better.
>
That will golf a little (and improve it) to:
$ raku -e '.say for lines()[3,2,5]' lines.txt
but you have to remember that it's zero-based. I used the first sample
file and got
Line 4
Line 3
Line 6
"The three great problems of computer science: compiler complexity and
'off-by-one' errors".
On 8/
Possibly OT, the "-er/-ee" boundary has become corrupted in recent usage.
I suppose "standees" in a bus might be tolerated, depending on your
view of transit riders as active or passive, but when a jail-break
occurs, the former prisoners should become "escapers", not "escapees".
The prison author
As I was about to post my other question, it occurred to me that
perhaps we should have a raku-users list, (and corresponding ones for
the other, formerly perl6-flavoured lists?
And now for the actual question. I'm experimenting with installing
Raku on an ARM machine, (specifically a PineBook Pro)
Can you provide some samples of what you are trying to match and
exclude? There might be alternative solutions.
Integer multiplication's obviously baked into the hardware, but might
this algorithm:
https://getpocket.com/explore/item/mathematicians-discover-the-perfect-way-to-multiply?utm_source=pocket-newtab
improve performance on BigInts, &c, or are we already using it? (If
performance is a problem.)
Acco
Having a consistent ("regular", in the linguistic sense), structure
for something like the op= form is obviously very desirable. It's so
much easier to teach and learn a rule like "op= has the same effect,
whatever "op" is; it takes the variable on the LHS, applies the
operator to its contents and
P.S. My apologies for top-posting in the quoted text, and my apologies
to William for the duplication.
On 11/29/20, Parrot Raiser <1parr...@gmail.com> wrote:
> Having a consistent ("regular", in the linguistic sense), structure
> for something like the op= form is obviousl
Raku allows for several different programming paradigms; procedural,
functional, (as in languages like LISP), and object-oriented. It is
possible to write purely procedural Raku, while ignoring O-O features
completely, though it does take some dodging.
Object-oriented.programming first surfaced in
Although it's a standard term, "class" has a misleading connotation of "set".
Using the "fruit" example, the class Fruit should indicate a set of
relevant properties for a fruit, such as name, colour, taste, size,
possibly cost/kilo. Individual variables can be defined as Fruit-type
objects. Then $
While playing around with the bounding characters for the #` form, I
encountered an unexpected feature, which may or may not be a bug. If
the left bounding character (e.g. the { in #`{ occurs unbalanced in
the commented text, the compiler apparently treats it as code,
searches for the right bounder
> On 12/22/20, Vadim Belman wrote:
>>
>> You interpret it incorrectly. The problem is in your '#`{' comment
On 12/23/20, Parrot Raiser <1parr...@gmail.com> wrote:
> Removing the space between the #` and { changes the error message to:
>
> ===SORRY!
"Definition of invoke
transitive verb
1a : to petition for help or support
b : to appeal to or cite as authority
2 : to call forth by incantation : conjure
3 : to make an earnest request for : solicit
4 : to put into effect or operation : implement
I just went to the page at docs.raku.org on multi-line comments, to
suggest a couple of clarifying edits. The pencil icon invoked a 404
from GitHub.
When one goes to make a fix, and the fixer is broken, it's a bit
recursive. Can anyone cure problem #1, so I can get to step #2? :-)*
On 12/28/20, E
ed fix the problem.
>
> Richard
>
> On 28/12/2020 15:35, Elizabeth Mattijsen wrote:
>> https://github.com/Raku/doc/issues/3753
>>
>>> On 28 Dec 2020, at 16:23, Parrot Raiser <1parr...@gmail.com> wrote:
>>>
>>> I just went to the page at docs.r
I'm setting up a new machine, and I don't want to install something
I'm going to have to update in a week.
The fundamental problem here seems to be the imprint of Perl's
behaviour on the mental model. Assigning arrays flattens them into a
list of their contents, which then gets used as input to the
assignment. That means that more complicated structures, such as
arrays of arrays need some faking.
Raku
There's a post online comparing Python's performance of matrix
arithmetic to C, indicating that Python's performance was 100x (yes, 2
orders of magnitude) slower than C's.
If I understand it correctly, matrix modules in Raku call GNU code
written in C to perform the actual work.
Does that make Ra
> Doing so would, of course, be a very bad idea. But still, you _could_.
Something of an understatement, I think. :-)*
Seriously, this made me wonder if inscrutable error messages might be
clarifed by a (reverse) trace of the last few steps in parsing. That
would show you what the compiler thoug
I'n not familiar with list managers today, but in old Unix systems it
used to be possible to put a ".forward" file in one's home directory
that would automatically forward mail to another address.
Conceptually, an alias or symbolic link, so that more than one address
ultimately pointed to one acco
What do these enormous numbers represent?
On 4/13/21, sisyphus wrote:
> Hi,
>
> C:\>raku -e "say 1.8446744073709552e+19 == 18446744073709551615"
> True
>
> I think I understand why raku deems this to be true.
> The LHS is 0x1p+64, which is identical to the double that the RHS rounds
> to.
> (AFAI
https://doordash.engineering/2021/05/04/migrating-from-python-to-kotlin-for-our-backend-services/
Obviously, it's too late to persuade them to consider Raku, but it's
an interesting thought experiment to add that to the comparisons.
I posted this to the Perl 6 group on LinkedIn, in the absence of
A great analysis of, and answer to, the question. Worthy of being
enshrined in a blog posting.
Just to reinforce Geoff's message, remember Tony Hoare's "Premature
optimisation is the root of all evil"
https://effectiviology.com/premature-optimization/ as quoted by Rob
Pike https://users.ece.utexas.edu/~adnan/pike.html
https://rakudo.org/star shows the latest Rakudo* bundle for Linux as
2021.04 - is that really the latest?
In this article, "Every Simple Language Will Eventually End Up Turing Complete"
https://solutionspace.blog/2021/12/04/every-simple-language-will-eventually-end-up-turing-complete
the author points out an unfortunate tendency for "simple" languages
to accrete features and morph into misshapen monste
Surely Jonathan Worthington (or one of the other people who've worked
on the compiler) would be in a better position to answer this sort of
question.
Assuming that you write in a normal "interpreted-language" style,
(i.e. gradually adding features, testing, and moving on to the next
one, do you no
>
> That said, right now gmail is claiming whipupitude is misspelled...
>
An alternative is "whipitupitude" (the difference being the first "it".
Given the examples I've seen over the years, there's a need for an
opposite to "idiomatic", for programming that arrives at a solution by
a Rube Goldber
The cause of the problem may well need to be fixed for other reasons,
but re-purposing an almost universal operator like "!" ("not") sounds
like a thoroughly bad idea, the route to non-standard code.
If you must have a factorial operator, what's wrong with defining "Fact"?
On 10/14/22, Elizabeth
This https://raku.land/zef:lizmat/path-utils might be what you're
seeking. (So new the electrons have barely settled into their new
orbits.)
I think I had problems finding the audio options on Jitsi, and wasted
a couple of meetings doing so. I'd suggest a "test" setup meeting,
where the whole agenda is ensuring that everyone has all the settings
right. Maybe set up a static video shot with background music to give
feedback?
On 2/2/23,
If you read this StackOverflow article:
https://stackoverflow.blog/2023/03/29/from-web2-to-web3-how-developers-can-upskill-and-
build-with-blockchain/
and look at the languages mentioned with APIs, you may notice some
missing. That could render them irrelevant to the future.
What can we do about
See https://youtu.be/QEnuzwCWpgQ
This is not meant to be an example of schadenfreude. Rust is an
interesting language, whose ecological niche has little in common with
Perl's or Raku's. Its principal rival is Go, which is definitely more
corporate. Alphabet already controls far too much. (Yes,
In https://youtu.be/L2jnRk2GYwg?si=ffds1MWsyZaB09HR Cassie talks about
creating a language for prompting AI bots. Isn't creating specialised DSs a
Raku strong point?
What's the reason behind the request?
On Sun, Jan 7, 2024 at 7:24 AM Elizabeth Mattijsen wrote:
> $ raku --help
>
> ...
> --optimize=level use the given level of optimization (0..3)
> ...
>
> > On 7 Jan 2024, at 07:09, ToddAndMargo via perl6-users <
> perl6-us...@perl.org> wrote:
> >
> > Hi
Part of the tension here may be coming from the attempt to debate too
many levels of structure at once.
One of the common factors that has contributed to the longevity of
Unix (in the generic sense), and the Internet, is their layered
architectures. The kernel does its thing, the shell sits on top
On Wed, Jun 3, 2009 at 6:12 PM, Chris Mair wrote:
> Now, my problem is that perl6 code runs very slooow :(
>
> I understand this is all an early phase of development,
> but this is like 2 or 3 orders of magnitude slower than perl5 :(
>
> So, my question: is there something fundamentally
> fla
If Sun's propaganda about Dtrace :
http://www.sun.com/bigadmin/content/dtrace/ is anywhere near true, it
sounds as though it's a wheel we won't have to invent for
Parrot/Rakudo. It is apparently also available for Mac OS (Leopard)
http://tinyurl.com/2xas7q
On Sat, Mar 21, 2009 at 1:43 PM, Bora wrote:
>
> 3 . Go to the Program Files/git/bin folder and use the command " git clone
> git://github.com/rakudo/rakudo.git " for downloading rakudo ,
When I try this, I consistently get the messages:
Initialized empty Git repository in {directory}/rakudo.g
Following the instructions on the Rakudo how-to-get-rakudo page, I ran
./perl hello & hello.pl
As I had not yet written hello, perl6 objected as follows:
$ ./perl6 hello
Unable to open filehandle from path 'hello'
current instr.: 'perl6;PCT;HLLCompiler;evalfiles' pc 1099756 ((unknown file):-1)
cal
On 2/12/17, Brandon Allbery wrote:
>
> Translators are infamous for producing gobbledygook no self-respecting
> programmer would
> write
>
But unfortunately, far too many programmers do. :-)*
I agree with Brandon on this one.
RHS retaining its original value, even when being updated on the LHS
is a fundamental behaviour in Perl. Changing that, especially in
obscure special circumstances would be bad.
On 2/27/17, Brandon Allbery wrote:
> And yes, I know that it *is* retaining its valu
"There's at least one program out there where someone apparently used
od on the output of a telnet session, saw an ancient hack for ancient
teletypes involving a NUL, and thought that was the "right" way to do
it"
Another technological Cheshire Cat bite. :-)*
On 3/6/17, Brandon Allbery wrote
"Premature optimisation is the root of many evils", or words to that
effect. (I forget who said it, but I think it was someone credible.)
Write your code as clearly and simply as you can, then see if it
performs adequately under load. If it does, you're finished.
If it doesn't, instrument and tes
Polish spam! (Or should that be kilebasa?)
When did the lads from Lagos learn Polish? (It's clearly a 419.)
On 3/23/17, Marina Robert wrote:
> # New Ticket Created by Marina Robert
> # Please include the string: [perl #131047]
> # in the subject line of all future correspondence about this iss
If Zoffix gets this confused, maybe the explanation needs some work
for mere mortals?
On 4/30/17, Zoffix Znet via RT wrote:
> On Sun, 30 Apr 2017 18:47:16 -0700, c...@zoffix.com wrote:
>
>> The correct way to write that would be to use `&`.
>
> And .so on .name
>
"I think a good error message would be “Cannot modify an immutable Int
(42)”, or whatever else which includes the value itself."
Agree. Wherever possible, error messages should show exactly what upset them.
The authors of the message generator know what they're complaining
about, but that doesn't
"Warning; old COBOL programmer has escaped" :-)*
On 5/25/17, Aleks-Daniel Jakimenko-Aleksejev
wrote:
> # New Ticket Created by Aleks-Daniel Jakimenko-Aleksejev
> # Please include the string: [perl #131363]
> # in the subject line of all future correspondence about this issue.
> # https://rt.per
My apologies for accidental top-posting; I forgot to uncheck the
"include quoted" box.
Isn't it stretching the definition of "variable" to use it for what
are really user-named constants?
On 5/26/17, Gabor Szabo wrote:
> thanks!
>
>
> Gabor "impatient" Szabo
>
> On Fri, May 26, 2017 at 9:27 AM, Brent Laabs wrote:
>> You didn't keep reading far enough.
>>
>>> For information on var
That sounds like a rather complicated way to render a program even
more confusing.
On 5/26/17, Timo Paulssen wrote:
> You can bind an explicitly created scalar into a sigil-less variable and
> it'll be variable rather than constant
>
If they are really identical, might it be an idea to use symbolic
links for 2 of them?
That would reduce the code to be stored, maintained, and transmitted,
and make it blatantly obvious if different versions are required.
On 5/28/17, Nelo Onyiah wrote:
> I presume that's j for JVM and m for Moar
That is so easy for a programmer to implement; I have an "nyi"
subroutine/function in the my skeleton scripts for both Perl 5 and
Bash. Is it worth cluttering the language?
The REPL's almost an independent project.
Can it be made modular, to reduce the coupling between it and the language?
e/she controls, what is stopping them?
>
> However, I would argue it is best, at present and in order to facilitate
> adoption of perl6, that we keep to the current naming scheme and make it
> easy for newcomers to perl6.
>
> Finanalyst
>
>
> On Wednesday, May 31, 2017 12:34 AM, Parrot Raiser wrote:
>> The REPL's almost an independent project.
>>
>> Can it be made modular, to reduce the coupling between it and the
>> language?
>
> Do you have something specific in mind?
I don't know enough about the internals to have any particular suggestions.
Keeping functions properly local is just one of those "motherhood and
apple pie" principles that is much easier to follow if it is done
consistently from the start.
As a kibitzer, I tried that with "This is Rakudo version 2017.04.3
built on MoarVM version 2017.04-53-g66c6dda
implementing Perl 6.c".
and got:
perl6 –e "my \foo = Callable but role:: { };"
Could not open –e. Failed to stat file: no such file or directory
while:
perl6 -e "say 'boo'"
boo
worked
I just noticed the - was a different length, so I changed it, et voila:
perl6 -e "my \foo = Callable but role:: { };"
===SORRY!=== Error while compiling -e
Undeclared routine:
role used at line 1. Did you mean 'roll'?
On 6/5/17, Parrot Raiser <1parr...@gmail.com>
> Something bit you; note that you are not using "-e" but "–e" (U+2013 EN DASH).
>
Right, the consequence of cutting & pasting. It's interesting that the
error message on the corrected version is unlike either of the
original examples.
When I first started programming, any program that took physical input
(which had usually been keyed very accurately by reliable young
women) had to pass a test.
It was fed its own machine code, backwards. It was expected to reach a
normal EOJ, (albeit with a significant output of error messages)
When I first started programming, any program that took physical input
(which had usually been keyed very accurately by reliable young
women) had to pass a test.
It was fed its own machine code, backwards. It was expected to reach a
normal EOJ, (albeit with a significant output of error messages)
On 6/7/17, Joachim Durchholz wrote:
> There's also the issue that undefined behaviour tends to become
> exploitable as part of a security hole.
>
Or, even worse, depended on for some perverse result.
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