Re: Checking for nil return

ed, Dec 30, 2020 at 10:02 PM yary wrote: > This commit shows where Nil expanded from being "Absence of a value" to, > alternatively, "a benign failure". Unfortunately I haven't found discussion > on "benign failure" – semantics, use case, prior art, example,

Re: Checking for nil return

pairing. > Now I need to think through why it (grumbled that it) is wrong. > (or not wrong: for performance reasons, it is good to support values > that can never be undefined) > > -- Ruud > > > On 2020-12-28 22:35, yary wrote: > > [...] > > Allowing Failure as a return alw

Re: Checking for nil return

about the reasoning behind it being defined as valid sub a( --> Int:D ) { return Nil } -y On Sun, Dec 20, 2020 at 7:18 PM Brad Gilbert wrote: > Nil is always a valid return value regardless of any check. > > This is because it is the base of all failures. > > On Sat, Dec 19,

Re: Checking for nil return

mpletely sure due to the nature of Nil being a defined type object. -y On Sun, Dec 20, 2020 at 2:35 PM Joseph Brenner wrote: > yary wrote: > > Is this a known issue, or my misunderstanding? > > > >> subset non-Nil where * !=== Nil; > > (non-Nil) > >> sub o

Checking for nil return

Is this a known issue, or my misunderstanding? > subset non-Nil where * !=== Nil; (non-Nil) > sub out-check($out) returns non-Nil { return $out } > out-check(44) 44 > out-check(Nil) Nil ^ Huh, I expected an exception on "out-check(Nil)" saying the return value failed the "returns" constraint.

Re: "temp" vs "my"

Thanks! Knew I'd seen the concept of OUTER but couldn't remember the keyword. -y On Wed, Oct 3, 2018 at 5:51 AM, Timo Paulssen wrote: > you can refer to the outer $v as OUTER::('$v'), that ought to help :) > On 03/10/2018 08:10, yary wrote: > > Reading and playing with https://do

"temp" vs "my"

Reading and playing with https://docs.perl6.org/routine/temp There's an example showing how temp is "dynamic" - that any jump outside a block restores the value. All well and good. Then I thought, what if I want a lexical temporary value- then use "my"- and this is all well and good: my $v =

Re: 3 kinds of yadda

Semantically !!! is "if control flow hits here, it's an error" ... is "The implementation is elsewhere, or this is not yet implemented" at least that's my impression -y On Mon, Sep 10, 2018 at 12:04 PM, Parrot Raiser <1parr...@gmail.com> wrote: > There are 3 kinds of yadda, yadda operator: >

Is negative lookbehind behaving here?

I want to match something anywhere but at the end of a string in one example, or anywhere but at the start of a string in another example. The "except at start" one has me stumped. Not sure if it's me or if I've tickled a bug. perl6 --version This is Rakudo Star version 2018.01 built on MoarVM

Re: (default) Real->Rat precision should match what compiler uses for literals

often deal with "flat" text files full of metrics, and remotely sourced json, and XML. The data types are sometimes unexpected. -y On Wed, Mar 7, 2018 at 5:16 PM, Solomon Foster <colo...@gmail.com> wrote: > On Sun, Mar 4, 2018 at 8:49 AM, yary <not@gmail.com> wrote:

Re: (default) Real->Rat precision should match what compiler uses for literals

The point of Rats is making Perl6 more correct and less surprising in common cases, such as $ perl6 > 1.1+2.2 3.3 > 1.1+2.2 == 3.3 True > 1.1+2.2 != 3.3 False vs any language using binary floating-point arithmetic DB<1> p 1.1+2.2 3.3 DB<2> p 1.1+2.2 == 3.3 DB<3> p 1.1+2.2 != 3.3 1 In

Re: (default) Real->Rat precision should match what compiler uses for literals

Still thinking this out. Does the default epsilon influence a Rat == Float comparison? If so, for that purpose, the most useful epsilon is one that maximizes its correctness.

Re: (default) Real->Rat precision should match what compiler uses for literals

Or instead of 1/2**(32 or 64), re-asking these questions about epsilon: " Why so large? Why not zero? " What's justification for using 1/100,000 vs. something smaller vs. 0 "max possible precision?"

Re: (default) Real->Rat precision should match what compiler uses for literals

Zeroing in on one point: > > A solution might be to instead provide a pragmatic, rather than > mathematical > > parameter: > > > > :$numbits = 64 > > > > This would say to keep as much precision as possible while making the > result > > fit in 64 bits. For example 2.147483647e0.Rat would

Re: Naming debate- what's the location for it?

A bit of a digression around marketing/evangelizing > When I wanted to learn DataScience, courses using R and Python were > readily available. Even though I had been using Perl for 20 years, I did > not even know where to start in the Perl ecosystem! > I've wondered why PDL isn't more popular,

Re: Naming debate- what's the location for it?

On Thu, Feb 8, 2018 at 2:15 PM, Aaron Sherman wrote: > ... > IMHO, 6 has always been the personal name, but it could be changed to > something that's "sixish" without being an explicit number. Normally, I'd > recommend Latin, but Perl Sex is probably not where anyone wants to go...

Naming debate- what's the location for it?

I recall coming across a post saying the Perl6 name is up for discussion - searched & found this post now https://6lang.party/post/The-Hot-New-Language-Named-Rakudo describes it. Is there a forum where the name's being discussed that I can read? Woke up this morning with a name proposal that

Re: fixing infinities and ranges etc

I'm not sure I entirely understand the proposal- does it change Inf aka ∞ ? Otherwise I like it, and prefer the X::NegInf and X::PosInf,spellings as being easy-to-understand & a good Huffman-encoding. Before/AfterEverything are also easy to understand, and would be as natural to use for sorting

Re: can a method name contain a funny character?

Thanks for the in-depth analysis. My misunderstanding was about what an identifier considers a number; I have no well-thought-out ideas on the subject of what an identifier ought to be. Having the docs mention that "number" means only characters with a Unicode Property GeneralCategory of Nd might

Re: can a method name contain a funny character?

To be clear, I expect that "number" in "followed by zero or more word characters (alphabetic, underscore or number)" means "if Unicode thinks it's numeric, you can use it in an identifier after the first character." I don't expect that every numeric codepoint in Unicode must evaluate to number in

Re: can a method name contain a funny character?

On Tue, Apr 12, 2016 at 6:12 PM, Brandon Allbery wrote: > I was explaining why some "symbols" are acceptable to the parser. Which one > is more appropriate is not my call, I was thinking about what exactly are valid identifiers in Perl6/rakudo's implementation. The docs

Re: A practical benchmark shows speed challenges for Perl 6

On Wed, Mar 30, 2016 at 3:20 PM, Elizabeth Mattijsen wrote: > Thanks for your thoughts! > > I’ve implemented $*DEFAULT-READ-ELEMS in > https://github.com/rakudo/rakudo/commit/5bd1e . > > Of course, all of this is provisional, and open for debate and bikeshedding. Thanks! And

Re: A practical benchmark shows speed challenges for Perl 6

Cross-posting to the compiler group- On Wed, Mar 30, 2016 at 8:10 AM, Elizabeth Mattijsen wrote: > If you know the line endings of the file, using > IO::Handle.split($line-ending) (note the actual character, rather than a > regular expression) might help. That will read in

Blogging on Perl6 anonymous proto/multi

Back in June of last year some discussion about multi-subs got me thinking and posting about anonymous proto/multi routines here. It's been bubbling in the back of my mind since then, and as my Valentine to the language, I've posted my thoughts at http://blogs.perl.org/users/yary/2016/02/apropos

Re: It's time to use "use v6.c"

"panda --force install p6doc" fixed it for me!

It's time to use "use v6.c"

this morning I installed the 2016.01 R*. Now I'm at the NYC perl6 study group, and a helpful neighbor asked me to start up p6doc. It gave me an error about EVAL being dangerous, and after opening a ticket & adding "use MONKEY-SEE-NO-EVAL" to my source, I got "Undeclared name:CompUnitRepo used

Re: It's time to use "use 6.c"

Thanks all... I expect hiccups... just venting to help (future coders and current self)... while we're on this topic a) lwp-download.pl doesn't have a "use 6". Since Windows ignores the shebang, it invokes perl5 which is registered to handle "pl" files, and gives a bunch of syntax errors. If it

Re: Rationale for $!

On Wed, Jan 27, 2016 at 11:00 AM, Felipe Gasper wrote: > Could it not be: > > try my $f = open(...) or die … > Don't need a "try" there to make it work. An exception object/failure is false, so "my $f = open(...) or die" will assign the exception to $f, which is false,

Re: Exploit the versioning (was Re: Backwards compatibility and release 1.0)

Short answer: everything must declare which semantics it expects- everything in Panda/CPAN at least. And we already knew it, just need to do it. Full post: This thread points to a bigger problem, which has a solution that is both cultural and technical. Perl5 has a colossal code corpus, humbling

Re: Backwards compatibility and release 1.0

On 10/13/2015 03:17 PM, Moritz Lenz wrote: >... We have 390+ modules, and hand-waving away all > trouble of maintaining them seems a bit lofty. > ... a large percentage of the module updates are done by group of > maybe five to a dozen volunteers. ... 5 people updating 70% of 390 > modules.

Re: [perl6/specs] 614b6f: doc with/without

with, without look awesome. -y On Sat, Aug 8, 2015 at 2:38 PM, GitHub nore...@github.com wrote: Branch: refs/heads/master Home: https://github.com/perl6/specs Commit: 614b6f36e1cae4c787e378bc6ab2afa1f86de1f0

What's the intent of anon proto/anon multi?

Rakudo (both star 201503 rakudo-moar 7b5256) complains about anon multi, saying Cannot use 'anon' with individual multi candidates. Please declare an anon-scoped proto instead in response to anon multi foo (Int $x) { $x + 1 }; Given that message, I created an anon proto foo and assigned it to a

Re: Types for Perl 6: request for comments

Now that I've read ahead to 3.4, the multi method solution shown can be a little simpler, just need to add multi to the original equal methods, see attached. -y On Tue, Jun 30, 2015 at 4:16 PM, yary not@gmail.com wrote: Section 3.2's example does not fail for the given reason This tries

Re: Types for Perl 6: request for comments

Section 3.2's example does not fail for the given reason This tries to access the c instance variable of the argument $b thus yielding a run-time error - instead Perl6 more correctly complains that it was expecting a ColPoint, but got a Point instead. Indeed one cannot generally replace a subtype

Re: Types for Perl 6: request for comments

The anon does something. For example this code prints bob my $routine = proto bar (|) { * }; multi bar (Int $x) { $x - 2 } multi bar (Str $y) { $y ~ 'b' } say $routine('bo'); but change the first line to my $routine = anon proto bar (|) { * }; and you get an error Cannot call 'bar'; none of

Re: Types for Perl 6: request for comments

I'm reading it a bit at a time on lunch break, thanks for sending it along, it's educational. My comments here are all about the example on the top of page 5, starting with the minutest. First a typo, it says subC where it should say sumC multi sub sumB is ambiguous, due to your use of ;; there.

Anonymous multi-subs

Now that I've thought about it for 90 seconds (not fully-formed idea), if one were to have an anonymous multi-sub, it ought to be constructed from a list of *signature*, *body *pairs. And/or, any non-finalized sub could have a method to add another *signature, body* to its dispatch list.

Rationalizing numeric types

Thinking over my programming career, there were a few occasions I had to spend time working around floating point errors, and it was a nuisance. There were even fewer times when I worked with transcendental numbers- programs dealing with geometry or tones or logarithmic scales- and those times,

Re: Language design

I like the explanation of how Rats solve a class of rounding errors, 0.3 - (0.2 + 0.1) equals exactly 0 for example. On the other hand, it's still a compromise that's shifting closer to correctness, fixing a bunch of potential bugs, but not all in that class: Rakudo: say 2 - (sqrt 2) ** 2

Re: The invocation operators .* and .+

On Wed, Jun 17, 2015 at 1:29 PM, Aristotle Pagaltzis pagalt...@gmx.de wrote: * yary not@gmail.com [2015-06-17 17:10]: Perl6's TEARDOWN Sorry for the confusion. It’s not in Perl 6. I invented .teardown for this example because I didn’t want to call it .destroy – that’s all. That's good

Re: The invocation operators .* and .+

A couple years ago I wrote a little Perl6 in response to a challenge, and it took me a while to figure out BUILD, BUILDALL, and new(). Learning the object model meant reading what was available on the web plus some time on the #perl6 IRC channel. I managed to get it all working properly for my

Re: [perl6/specs] 126dd3: Mark .exists and .delete as deprecated, use :...

I suspect there are copy-paste errors on the delete sections of the new text: ... the +normal way to test for existence is to apply the C:delete adverb to a +subscripting operation. The :delete adverb tests for existence? -y On Mon, Sep 30, 2013 at 6:09 AM, GitHub nore...@github.com wrote:

Re: Commensurability as Key

I'll bite... this concept of commensurablity is not one I grasp from your email. functions are (sugarably) degenerate (many to 1) relations and procedures are (sugarably) degenerate (state-transition) functions. Perl many other languages don't have a strong distinction between functions

Re: Are set operations needed?

And regardless of homotopy type theory being able to supplant set theory, with the spirit of there's more than one way to do it, set ops are still a welcome tool. Also in that spirit, would you like to write up a summary of HoTT alternatives to common set ops, or post a link to a HoTT summarzing

Re: [perl6/specs] 90fffb: short forms : @.[], %.{} and .()

Typo: theses operator - these operators -y On Mon, May 6, 2013 at 10:23 AM, GitHub nore...@github.com wrote: Branch: refs/heads/master Home: https://github.com/perl6/specs Commit: 90fffbad2868a1c3b3151c79a805f9834a4902e2

Re: The .trans method and Least Surprise

Speaking as a non-p6-coder proposal sounds good to me though the spec raises some other questions. The tr/// quote-like operator now also has a method form called trans(). Its argument is a list of pairs. You can use anything that produces a pair list: $str.trans( %mapping.pairs ); Does

Re: Not-so-smart matching (was Re: How to make a new operator.)

I also like agreement, conformance... In a situation like this, I reach for a thesaurus- very useful when looking for just the right name for a variable/method name/way to describe a concept. Here's a grab bag to start with: accord, agree, conformance, conformation, conformity, congruence,

Re: Setting private attributes during object build

on that point. ~/rakudo $ perl6 class A{has $.b; has $!c; submethod BUILD(:$b,:$c,:$x){say b=$b c=$c x=$x}} A.new(b=4,c=5,x=6) b=4 c=5 x=6 If the complaint is that yary wanted to pass positional args to a constructor, then I have no problem with having to write one's own non-standard new() method

Re: Setting private attributes during object build

I think I get this better now. Currently: Default new passes its capture (named args) to bless. Bless passes capture (all args) to the default BUILDALLBUILD. Default BUILD initializes only public attributes. My thought: Default new passes only named args matching public attributes to bless.

Setting private attributes during object build

I wrote my first perl6 over the weekend, needing some help on #perl6. And now after finishing some lunchtime thoughts I wanted to post here on my main sticking point. If one wants to set a private attribute, one must define a submethod BUILD. If one wants to use any argument in the constructor

Re: Setting private attributes during object build

On Wed, Feb 1, 2012 at 3:24 PM, Jonathan Lang datawea...@gmail.com wrote: Why must we use 'submethod BUILD' instead of 'method BUILD'? Is it some sort of chicken-and-egg dilemma? from S12: Submethods are for declaring infrastructural methods that shouldn't be inherited by subclasses, such as

Re: Setting private attributes during object build

On Wed, Feb 1, 2012 at 5:41 PM, Carl Mäsak cma...@gmail.com wrote: ... Getting back to the topic of the original post: I think blessall is a bad name for what's proposed, and I don't see a fantastically large need for that functionality. What's wrong with just defining a BUILD submethod in the

Re: Setting private attributes during object build

Looking back at my paltry code, what I ended up doing was having a BUILD submethod that just listed all my attributes, private and public, and an empty block, essentially turning bless into blessall. Which makes submethod BUILD looks like boilerplate, a magic invocation, repeated in my classes.

Re: Implementations until Perl 6.0.0 released?

Roughly speaking, will TIMTOWTDI apply to the language itself indefinitely? = yes. Perl 5 is a language defined by an implementation, Perl 6 is a language defined by a syntax and documentation. While there's no predicting what will happen, as of now it looks like there will be a few

multi vars

From S12- which I'm just reading due to a blog post from jwrthngtn, I haven't thought this through- --- You can have multiple multi variables of the same name in the same scope, and they all share the same storage location and type. These are declared by one proto declaration at the top, in which

Lists vs sets

+1 on this On Mon, Oct 25, 2010 at 4:56 PM, Jon Lang datawea...@gmail.com wrote: As for the bit about sets vs. lists: personally, I'd prefer that there not be quite as much difference between them as there currently is. That is, I'd rather sets be usable wherever lists are called for, with the

Re: Tweaking junctions

In general I like where this is going but need a little hand holding here- I'm not an expert on junctions or anything perl6- So I'm going to go on to propose that we create a fifth class of Junction: the transjunction, with corresponding keyword Cevery. It seems that by these definitions every

Re: 8ecf53: [Containers] split pick into pick and roll

The last added paragraph says (emphasis mine): +The default metaphor for _picking_ is that you're pulling colored +marbles out a bag and then putting them back. (For picking without replacement see Cpick instead.) +Rolling requires no temporary state. This is confusing to me. It is

Re: Natural Language and Perl 6

This is getting more and more off topic, but if you want some lojban pasers, start at http://www.lojban.org/tiki/tiki-index.php?page=Dictionaries,+Glossers+and+parsers -y On Mon, Aug 2, 2010 at 3:58 PM, Carl Mäsak cma...@gmail.com wrote: Jason (): No specific tool is best suited for natural

Re: Array membership test?

On Fri, Jul 30, 2010 at 2:22 PM, Aaron Sherman a...@ajs.com wrote: If you really want odd, try:  say [1,2,3].first: * === True; Result: 1 and  say [5,2,3].first: * === True; Result: Rakudo exits silently with no newline Looks like a side effect of True being implemented as an enum with

Re: Suggested magic for a .. b

On Thu, Jul 29, 2010 at 5:15 AM, Leon Timmermans faw...@gmail.com wrote: On Thu, Jul 29, 2010 at 3:24 AM, Darren Duncan dar...@darrenduncan.net wrote: Some possible examples of customization: $foo ~~ $a..$b :QuuxNationality # just affects this one test I like that $bar = 'hello'

Re: Array membership test?

On Thu, Jul 29, 2010 at 4:46 PM, Mark J. Reed markjr...@gmail.com wrote: $x ~~ any(@array) I think this came up recently, and that's the way! -y

Re: Suggested magic for a .. b

On Wed, Jul 28, 2010 at 8:34 AM, Dave Whipp d...@dave.whipp.name wrote: To squint at this slightly, in the context that we already have 0...1e10 as a sequence generator, perhaps the semantics of iterating a range should be unordered -- that is, for 0..10 - $x { ... } is treated as for

Re: Suggested magic for a .. b

Swapping the endpoints could mean swapping inside test to outside test. The only thing that is needed is to swap from to ||: $a .. $b # means $a = $_ $_ = $b if $a $b $b .. $a # means $b = $_ || $_ = $a if $a $b I think that's what not, ! are for!

Re: Suggested magic for a .. b

On Wed, Jul 28, 2010 at 2:29 PM, Aaron Sherman a...@ajs.com wrote: The more I look at this, the more I think .. and ... are reversed. .. has a very specific and narrow usage (comparing ranges) and ... is probably going to be the most broadly used operator in the language outside of quotes,

Re: multi-character ranges

On Wed, Jul 21, 2010 at 3:47 PM, Jon Lang datawea...@gmail.com wrote: ... When comparing two strings, establishing an order between them is generally straightforward as long as both are composed of letters from the same alphabet and with the same case; but once you start mixing cases,

Re: Suggested magic for a .. b

On Fri, Jul 16, 2010 at 9:40 AM, Aaron Sherman a...@ajs.com wrote: For example: Ab .. Be defines the ranges: A B and b c d e This results in a counting sequence (with the most significant character on the left) as follows: Ab Ac Ad Ae Bb Bc Bd Be Currently, Rakudo produces this:

Re: r31696 -[S32/Temporal] Permit day-of-month on Dates.

On Thu, Jul 15, 2010 at 9:21 AM, Mark J. Reed markjr...@gmail.com wrote: By analogy, I'd say week-of-year should work as well. Oof, is there a generally accepted for numbering weeks within a year? A month's boundaries' always coincides with a day's boundary, but a year only occasionally

Re: r31696 -[S32/Temporal] Permit day-of-month on Dates.

On Thu, Jul 15, 2010 at 2:13 PM, Brandon S Allbery KF8NH allb...@ece.cmu.edu wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 7/15/10 12:21 , Mark J. Reed wrote: By analogy, I'd say week-of-year should work as well. Wasn't the week stuff punted to a non-core module because there are

Re: r31630 -S02 : add initial formats for Blob (or Buf) literals

On Sun, Jul 11, 2010 at 6:11 PM, Darren Duncan dar...@darrenduncan.net wrote: ... There is also still the need to cover something that looks like a list of integers, for the general case of a Blob/Buf literal, and yet it should have an appearance more like that of a scalar/number/string/etc

Re: Filesystems and files [Was: Re: The obligation of free stuff: Google Storage]

Sounds like a sound generalization to make. bikeshedding On Wed, Jun 30, 2010 at 1:29 AM, Richard Hainsworth rich...@rusrating.ru wrote: This then means that there is an implicit $*FS.connect(); that makes the local system available to the program. mount is the jargon to make a filesystem

Re: Perl 6 in non-English languages

Reminds me of an article of yore from The Perl Journal Localizing Your Perl Programs http://interglacial.com/tpj/13/ which discusses the reasoning behind Locale::Maketext the point of which is that the values you're looking up should be able to be functions, to handle some edge cases where

Re: Perl 6 in non-English languages

If Perl 5 can support Lingua::Romana::Perligatahttp://www.csse.monash.edu.au/%7Edamian/papers/HTML/Perligata.htmland let you type benedictum factori sic mori cis classum. instead of bless sub{die}, $class; then Perl 6 should be able to do it even better. I think it would be implemented

Re: r31054 -[S03] suggestions from dataweaver++

And while we're at it with expanding examples, can we use string concatenation instead of addition? It makes following what's happening easier. eg, +1 on that prior post. -y

Re: Temporal.pod truncate

=== indeed truncating to any day of the week can be implemented by user trivially by adding/subtracting a constant number of days from the Monday returned. No, it's not a constant. $sun = DateTime.new('2010-04-11').trunc( :tosunday ) # 2010-04-11 $mon =

Re: r30369 - docs/Perl6/Spec/S32-setting-library

Tangentially, I'm a little surprised there isn't a random stream factory in the core. They're useful for reproducible testing. With a global random number generator, even if you seed it, another module can call rand and alter the sequence you get from your rand calls. I think something like srand

Re: underscores vs hyphens (was Re: A new era for Temporal)

On Sat, Apr 10, 2010 at 4:53 PM, John Siracusa sirac...@gmail.com wrote: I'm not sure if the intersection of people who speak English and people who program is better or worse than average when it comes to grammar, but I do know (from editing my share of writing) that the average is very bad

Re: Temporal.pod truncate

On Thu, Apr 8, 2010 at 7:26 PM, Mark J. Reed markjr...@gmail.com wrote: I think that :toweek should stay as-is; it truncates to whatever the .week method returns, and that's Monday-based. It would be too inconsistent for it to do anything else.   Asking for the latest prior Sunday or any other

Re: r30346 - docs/Perl6/Spec/S32-setting-library

On Thu, Apr 8, 2010 at 2:31 PM, pugs-comm...@feather.perl6.nl wrote: +month (for example April 31st) or in that non-leap year (for example February +29th 1996). 1996 *was* a leap year! Use 2006 (or 2010, or... etc) if you want a Feb with 28 days.

Re: A common and useful thing that doesn't appear to be easy in Perl 6

2010/4/6 Larry Wall la...@wall.org:    Set(Read | Write)   # bogus, R|W is really 3 sets, R, W, and RW!    Set(Read Write)   # okay, can only represent RW Set(A | B) doesn't seem so bogus to me, if what you want is the power set- not the original posters intent, but reasonable in other

Re: One-pass parsing and forward type references

A slight digression on a point of fact- On Mon, Feb 1, 2010 at 9:32 AM, Larry Wall la...@wall.org wrote: ... You are correct that the one-pass parsing is non-negotiable; this is how humans think, even when dealing with unknown names. It's common for people to read a passage twice when

Re: Custom errors on subsets?

On Mon, Jan 4, 2010 at 5:15 AM, Ovid publiustemp-perl6langua...@yahoo.com wrote: Given this code: subset Filename of Str where { $_ ~~ :f }; sub foo (Filename $name) { say Houston, we have a filename: $name; } ... Obviously the error message can use some work, but how would

Re: Comments on S32/Numeric#Complex

At 00:15 +0100 12/17/09, Moritz Lenz wrote: Not quite, .abs returns one of the polar coordinates (the magnitude), so only a method is missing that returns the angle. Any ideas for a good name? Would a method called phi with a unicode synonym φ be too obtuse? -y

Re: r29326 - docs/Perl6/Spec/S32-setting-library

On Fri, Dec 11, 2009 at 12:31 PM, pugs-comm...@feather.perl6.nl wrote: ... -It is a compiler error to use a bare Cprint without arguments. +The compiler will warn you if use a bare Cprint without arguments.  (However, it's fine if you have an explicit argument list that evaluates to  the

Re: Language status

I'm looking forward to Perl 6, and I'm looking into the spec right now, since that to me is the important bit of a language (I know, I'm bizarre). Not at all bizarre, P6 language spec development is the most important bit going on in the language right now. Well, that plus all the interesting

Re: r28597 - docs/Perl6/Spec/S32-setting-library

... Also, the domain should define how to compare objects and could provide details about whether the set is finite, countable or uncountable. ... Sounds like a role Domain that provides methods (off the top of my head)- ordering - returns Nil if the domain is unordered, or a method

Re: generality of Range

I'm confused between using ranges to generate a lazy list and using them as criteria to match against. These exclude continuous (non-countable) types- ... 2. There must be a successor function, so that given an object from the given domain, say a, successor(a) returns one and only one

Re: S26 - The Next Generation

On Thu, Sep 17, 2009 at 1:05 AM, Damian Conway dam...@conway.org wrote: Aaron Sherman asked: ... I'd very much like to establish that at default optimization levels for execution, this information is not guaranteed to be maintained past the creation of the AST. Unfortunately, it is. Perl 6

Re: Cobra Ioke Programming Languages

Matthew Walton wrote Yes, Perl 6 does - it is not backwards compatible with Perl 5. That so? I thought Perl6 was supposed to recognize and execute perl5 code. That statement itself implies that perl6 and perl5 are different languages, and I'm not too interested in arguing over semantics. I am

Re: Cobra Ioke Programming Languages

Perl is being actively developed for the Parrot VM. LLVM is another interesting option and if someone or some group would like to take it on, it would be a welcome alternate implementation. What parts in particular of Cobra and ioke look useful to you? Looking at Cobra's intro slide- * Cobra is

Re: Cobra Ioke Programming Languages

This is an interesting subpage under Cobra- http://cobra-language.com/docs/quality/ it actually bears a little on recent discussions about self-documenting code. I'm a Perl6 beginner so I'm making comments with expectation that others will correct where I'm wrong * Doc Strings Perl6's vision of

Re: r28196 - docs/Perl6/Spec

This spec subtly alters the meaning of Whereas yada used to mean this is not yet implemented, complain if executed it now adds but don't complain if it is a class fully implemented elsewhere. Allowing two implementations of a class iff one of them has a yada opens up maintenance issues.

Re: r28196 - docs/Perl6/Spec

I just saw the intent for this in the split up compilation of the setting thread- that it is useful to: Enable a class stub syntax that allows us to declare a given symbol as being a valid class without having to declare the body of the class at that time. For example: class Rat { ... };

Re: Parameter binding

On Sat, Jul 25, 2009 at 2:04 PM, Patrick R. Michaudpmich...@pobox.com wrote: On Thu, Jul 23, 2009 at 05:56:31PM +0200, TSa wrote: Hmm, it seems to be the case that the binding is defined to be a readonly binding to the variable. I consider this a bad thing. We should have my $x = 1;

Re: Is there a way to bulky feed?

I understand now. Given a large list, you'd like to assign chunks of the list to an array, easily, while looping. In other words, you're looking for a way to abbreviate this: my $chunk_size=10_000; my @big=''..'mnop'; for ^...@big :by $chunk_size { my

Re: Huffman's Log: svndate r27485

+1 on using ln() instead of log() Also, systems I know of that implement both log() and ln() default ln() with base e, as perl6 does, log() uses base 10.

Re: Is there a way to bulky feed?

On Wed, Jul 8, 2009 at 8:45 PM, Xiao Yafeng xyf.x...@gmail.com wrote: Any thoughts? First let's fix the whitespace in your post so it's easier to read- My question is: could I write below code in perl6: # 2 loops like for @a - $b[0],$b[1] {;} my @a = 1 2 3 4; my @b[2]; for @a -@b {;} my @a

Re: XOR does not work that way.

On Thu, Jul 2, 2009 at 8:58 AM, TSathomas.sandl...@vts-systems.de wrote: ... unless list associative operators somehow flatten the parens away and therefore see a single list of three values instead of two consecutive lists of two items. that's exactly what list associative does, it feeds an

Re: XOR does not work that way.

On Thu, Jul 2, 2009 at 9:01 AM, yarynot@gmail.com wrote: On Thu, Jul 2, 2009 at 8:58 AM, TSathomas.sandl...@vts-systems.de wrote: ... unless list associative operators somehow flatten the parens away and therefore see a single list of three values instead of two consecutive lists of two

Re: Signature for the series operator

S02 says- Anywhere you can use a single type you can use a set of types, for convenience specifiable as if it were an or junction: my Int|Str $error = $val; # can assign if $val~~Int or $val~~Str so would sub infix:...(Array|Scalar $values, Code $generator) be kosher? I'm with

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