»ö« Welcome to Perl 6! | perl6.org/ | evalbot usage: 'p6: say 3;' or rakudo:, or /msg camelia p6: ... | irclog: irc.perl6.org or colabti.org/irclogger/irclogger_logs/perl6 | UTF-8 is our friend!
Set by moritz on 22 December 2015.
00:07 redhands left 00:23 aborazmeh joined, aborazmeh left, aborazmeh joined 00:29 wamba left 00:31 Cabanossi left 00:32 Cabanossi joined 00:35 Xliff left 00:41 kybr joined 00:53 eliasr left 01:00 Cabanossi left 01:01 BenGoldberg left 01:02 cdg joined, Cabanossi joined 01:03 darkmorph joined, cdg left 01:04 margeas left 01:29 Cabanossi left 01:32 Cabanossi joined 01:40 redhands joined 01:55 raschipi left 02:04 wander left 02:10 colomon left 02:12 poohman joined 02:13 wander joined 02:15 apallatto left 02:18 ch3ck3r joined 02:19 colomon joined 02:21 apallatto joined 02:22 napo1eon left 02:32 cdg joined, bitrauser_ joined 02:36 bitrauser left 02:37 cdg left 02:41 Herby_ joined
Herby_ o/ 02:42
02:46 ilbot3 left 02:49 cdg joined 02:55 ilbot3 joined, ChanServ sets mode: +v ilbot3, darkmorph left 03:00 piojo joined
Herby_ I'm trying a Python OO exercise, using Perl 6. I'm stuck. 03:03
gist.github.com/anonymous/2f2221c3...73dd552aaa 03:04
How do I create the "last_id" attribute in p6? For each note created, it should get the next id available
ugexe ++$ 03:09
Herby_ ?
ugexe or `state $last_id += 1`
Herby_ do I declare $last_id outside of the class too? 03:10
ugexe not with `state`
oh i see 03:11
m: class Foo { my $last_id = 0; method add { $last_id++ }; method last_id { $last_id } }; Foo.new.add; Foo.new.last_id 03:12
camelia ( no output )
ugexe m: class Foo { my $last_id = 0; method add { $last_id++ }; method last_id { $last_id } }; Foo.new.add; Foo.new.last_id.say
camelia 1
ugexe m: class Foo { my $last_id = 0; method new { $last_id++; self.bless() }; method last_id { $last_id } }; Foo.new; Foo.new.last_id.say 03:13
camelia 2
Herby_ awesome 03:14
thanks
03:15 cdg left
wander C<\n> matches a single, logical newline character. C<\n> is supposed to also 03:19
match a Windows CR LF codepoint pair; though it's unclear whether the magic
happens at the time that external data is read, or at regex match time.
unclear?
is it?
03:27 dominix joined
dominix hi guys 03:27
ugexe i dont think its unclear, i think its just not what you might expect coming from other languages
dominix do someone knows about the project V5 ? that is perl5 implemented in rakudo. Is it dead ? stalled ? of no interest ? 03:28
03:32 noganex joined 03:33 ryn1x left 03:35 noganex_ left
geekosaur wander, I think which happens is not part of the spec, but part of the implementation? 03:39
03:44 poohman left
wander agree, spec says "\n matches logical newline" 03:44
I think the implementation is, that it happens when external data is read 03:45
ugexe depends, what if you read it in binary and decode it using a decoder that does not do newline translation? 03:46
geekosaur yes, current rakudo-moar at least rewrites text mode newlines to a general newline grapheme
on read 03:47
03:53 Herby_ left 03:55 khw left, drissel left 04:04 wander left
piojo Zoffix: Thank you. moritz already corrected me once about the %hash<$val> incorrect syntax. I really need to break that habit! 04:17
04:24 evalable6 left, evalable6 joined, ChanServ sets mode: +v evalable6 04:42 mson left 04:45 Cabanossi left 04:46 Cabanossi joined 04:53 K_ joined
samcv is there a way for modules to know what version they are? 04:53
like some dynamic variable that stores the version number of that installed module? 04:54
K_ Whatsnext?
samcv ugexe, do you know?
K_ 32
?: 04:55
samcv K_, do you have a question?
K_ How do i win? And get to walk away without spreading this diseez? 04:56
ugexe samcv: github.com/rakudo/rakudo/pull/1132 needs this to do it in a reasonable way, after which point we can possibly add it to .^ver
04:56 aborazmeh left
samcv ugexe, can we add a --version option to zef now? i always want to know what version i'm running but there's no way 04:57
and i'm guessing a lot of people may expect that to work
ugexe no, that example is shown in the PR
samcv oh you mean it adds it as an option by itself 04:58
ok thanks for link to PR 04:59
ugexe it makes it possible for zef to do it
05:03 K_ left 05:16 cdg joined 05:20 cdg left 05:27 raiph left 05:29 Cabanossi left 05:31 Cabanossi joined
sacomo hi all 05:35
05:49 wamba joined 05:58 Cabanossi left 06:00 finanalyst joined, Cabanossi joined
finanalyst can anyone tell me whether the specification for the META.json file in S22 has been updated? 06:01
mostly I am interested in the depends: field
06:08 Mrofnet joined 06:10 Morfent joined 06:11 Merfont left 06:12 Mrofnet left 06:13 darutoko joined
sacomo finanalyst, now sure if the ver, author adverbs work in depends. I haven't seen any modules using them. 06:14
finanalyst sacomo: so far I have seen some ver/author in modules, eg. Bailador. However, I remove these adverbs. My question is about the structure of depends 06:16
According to S22, there are two / three structures: a) array of string, b) array of string | hash (which contains hints), c) hash of hash of array of string 06:17
Recently, App::Cpan6 started using the hash structure, which broke my analysis program. 06:18
Since I originally only took into account array of string, I now want to make more generic. Just checking to see if S22 has full spec 06:19
sacomo yeah, I have only seen the array of strings, App::Cpan6 is the first I have seen use that structure. I think now that the cpan6 effort is underway that will become more common. 06:23
06:23 sena_kun joined 06:29 skqvheallf joined, skqvheallf left 06:30 Cabanossi left 06:31 Cabanossi joined 06:34 dominix left 06:39 Piotr_ joined 06:41 mempko joined 06:49 parv joined 06:56 wander joined
wander m: uniname("一").parse-names() 07:02
camelia Unrecognized character name [<CJK Ideograph-4E00>]
in block <unit> at <tmp> line 1
wander m: say uniname("一")
camelia <CJK Ideograph-4E00>
wander why does `uniname("一").parse-names()` not work? 07:03
I have seen rakudo #1031 but still don't know how parse-names work. especially where the dict is 07:05
07:16 evalable6 left, evalable6 joined
Geth doc: b24a42baee | (Alex Chen)++ (committed using GitHub Web editor) | doc/Language/regexes.pod6
Update regexes.pod6
 07:17
synopsebot Link: doc.perl6.org/language/regexes
apallatto ~/2 07:22
07:23 abraxxa joined 07:24 domidumont joined 07:28 domidumont left 07:30 domidumont joined
Geth doc/master: 4 commits pushed by (Jeremy Studer)++, (Jarkko Haapalainen)++ 07:34
wander m: say 'abcdefg' ~~ /\w ** {-Inf}/; # OUTPUT: «｢｣␤»
camelia 5===SORRY!5=== Error while compiling <tmp>
Bogus statement
at <tmp>:2
------> 3<BOL>7⏏5»
expecting any of:
prefix
term
wander m: say 'abcdefg' ~~ /\w ** {-42}/; # OUTPUT: «｢｣␤» 07:36
camelia 5===SORRY!5=== Error while compiling <tmp>
Bogus statement
at <tmp>:2
------> 3<BOL>7⏏5»
expecting any of:
prefix
term
wander m: say 'abcdefg' ~~ /\w ** {-10..-42}/;
camelia ｢｣
wander m: say 'abcdefg' ~~ /\w ** {-10..-42}/; # OUTPUT: «｢｣␤»
camelia 5===SORRY!5=== Error while compiling <tmp>
Bogus statement
at <tmp>:2
------> 3<BOL>7⏏5»
expecting any of:
prefix
term
wander m: say 'abcdefg' ~~ /\w ** {-Inf}/;
camelia ｢｣
wander it complain "This type (Failure) does not support positional operations in block <unit> at <unknown file> line 1" on my REPL 07:37
This is Rakudo version 2017.07 built on MoarVM version 2017.07 implementing Perl 6.c.
and 07:38
m: say 'abcdefg' ~~ /\w ** {-10..-42}/;
camelia ｢｣
wander output ｢abcdefg｣
m: say 'abcdefg' ~~ /\w ** 1..*/;
camelia ｢abcdefg｣
geekosaur yes, that was a change within the past few months 07:39
(bug fix) 07:40
wander ok, i'm going to get a recent release 07:41
07:41 redhands left 07:49 sena_kun left 07:57 rindolf joined 07:58 Cabanossi left 08:01 Cabanossi joined
wander m: (try say 'abcdefg' ~~ /\w ** {42..10}/ ) orelse say ($!.^name, $!.empty-range); 08:06
camelia (X::Syntax::Regex::QuantifierValue True)
08:07 TEttinger left
wander m: (try say 'abcdefg' ~~ /\w ** {42..10}/ ); say ($!.^name, $!.empty-range); 08:07
camelia (X::Syntax::Regex::QuantifierValue True)
wander m: (try say 'abcdefg' ~~ /\w ** {42..10}/ ) // ($!.^name, $!.empty-range);
camelia ( no output )
wander m: (try say 'abcdefg' ~~ /\w ** {42..10}/ ) // say ($!.^name, $!.empty-range);
camelia (X::Syntax::Regex::QuantifierValue True)
08:08 jonas1 joined
wander m: (try say 'abcdefg' ~~ /\w ** {NaN..42}/ ) // say $!; 08:08
camelia Cannot use Range with non-Numeric or NaN end points as quantifier
in block <unit> at <tmp> line 1
wander m: (try say 'abcdefg' ~~ /\w ** {NaN..42}/ ) // say $!.resume; 08:11
camelia This exception is not resumable
in block <unit> at <tmp> line 1
wander m: (try say 'abcdefg' ~~ /\w ** {NaN..42}/ ) // say $!.Str 08:12
camelia Cannot use Range with non-Numeric or NaN end points as quantifier
08:16 cdg joined 08:17 rindolf left 08:19 zakharyas joined 08:20 cdg left 08:21 salva joined 08:26 rindolf joined 08:30 Cabanossi left 08:31 Cabanossi joined 08:36 Ven joined 08:37 Ven is now known as Guest36397 08:39 robertle left
wander Note that you cannot easily obtain the same behavior(regex conjunction) with a look-ahead, because a look-ahead doesn't stop looking when the quoted string stops matching. 08:43
^^ what is a look-ahead? 08:44
moritz it's a regex doens't consume characters 08:45
for example / \w+ <?before '='> / matches a word only if it is followed by a '='
but the regex matches only the word, not the '=' 08:46
explained in more detail in www.amazon.com/Parsing-Perl-Regexe...1484232275 </ad type="blatant">
08:49 Mrofnet joined, rindolf left
wander m: say "42=" ~~/ \w+ [<?before '='> && <.ws>]/ 08:50
camelia ｢42｣
wander emmmm...what is the note means? && works well on look-ahead it seems 08:51
btw, indeed looking forward to your new book 08:52
08:52 Morfent left 08:59 araujo left, rindolf joined 09:02 dj_goku_ joined 09:04 scovit joined 09:05 dj_goku left
moritz yes, but only because <.ws> is also a zero-width match 09:05
09:07 mempko left 09:09 eliasr joined
moritz m: say so 'abc' ~~ / <?before a> && . / 09:09
camelia False
moritz m: say so 'abc' ~~ / <?before a> . /
camelia True
moritz m: say 'abc' ~~ / <?before a> .. /
camelia ｢ab｣
09:11 wander left 09:12 Guest36397 left 09:23 lizmat left, lizmat joined 09:43 evalable6 left 09:44 evalable6 joined, Cabanossi left 09:46 Cabanossi joined 10:01 robertle joined 10:12 rurban joined 10:14 Cabanossi left, wamba left 10:16 Cabanossi joined 10:22 wander joined, parv left
wander .tell moritz thanks for your patient explanation, and sorry for I'm leaving for a while 10:23
yoleaux wander: I'll pass your message to moritz.
moritz you're welcome, and no problem 10:25
yoleaux 10:23Z <wander> moritz: thanks for your patient explanation, and sorry for I'm leaving for a while
El_Che morning 10:26
10:27 knight__ left
AlexDaniel squashable6: next 10:33
squashable6 AlexDaniel, ⚠🍕 Next SQUASHathon in 3 days and ≈23 hours (2017-11-04 UTC-12⌁UTC+14). See github.com/rakudo/rakudo/wiki/Mont...Squash-Day
jnthn m: use nqp; say nqp::eqaddr(Int.new(5), Int.new(5)) # :) 10:37
camelia 0
jnthn oops 10:38
geekosaur reallyUnsafePtrEq# :p
10:47 evalable6 left, evalable6 joined, ChanServ sets mode: +v evalable6 10:55 nadim_ joined
Geth doc: dbff958f5d | (Alex Chen)++ (committed using GitHub Web editor) | doc/Language/regexes.pod6
Add and modify examples

on zero or one quantifiers `?` and conjunction `&&` And rewrite example on greedy versus frugal quantifiers		 10:58
synopsebot Link: doc.perl6.org/language/regexes
10:59 wamba joined 11:00 Cabanossi left 11:01 Cabanossi joined 11:02 cdg joined 11:03 sena_kun joined
Geth mu: 912a0d9d5b | (Tom Browder)++ (committed using GitHub Web editor) | misc/perl6advent-2017/schedule
take a shot
 11:13
11:17 nadim_ left 11:20 margeas joined, cdg left 11:21 domidumont left 11:33 zakharyas left, knight__ joined
knight__ Hello, I am creating a module, but what is the real purpose of 'use lib 'lib''? Load all modules symbols from path lib ? 11:34
timotimo not all, but it'll put the lib folder first in the list of locations to look in 11:36
11:40 zakharyas joined, domidumont joined 11:47 cgfbee joined
knight__ timotimo: Is there any option like python globals()/locals() it returns symbols which have been defined in scope? 11:50
timotimo m: say ::.keys
camelia ($=pod $_ $/ !UNIT_MARKER $=finish EXPORT $! ::?PACKAGE GLOBALish $¢ $?PACKAGE)
timotimo that's how you get at the lexical scope's contents
m: say OUR::.keys
camelia ()
timotimo those are the package-scoped variables, i.e. everything declared "our" instead of "my" 11:51
lizmat m: my $foo; dd ::.keys<$foo>
camelia Failure.new(exception => X::AdHoc.new(payload => "Type Seq does not support associative indexing."), backtrace => Backtrace.new)
lizmat hmmm
m: my $foo; dd ::<$foo>
camelia Any $foo = Any
lizmat m: my $foo = 42; dd ::<$foo>
camelia Int $foo = 42
timotimo imma be AFK for a bit 11:52
11:53 finanalyst left
knight__ timotimo: Also, is there any doc about environment bindings? I mean how interpreter makes some "execution" plan? 11:53
timotimo i don't know what that means?
knight__ I will show, wait 11:54
timotimo someone else will surely be able to answer while i'm gone
seeya
knight__ ok
:-)
bye, thank you
12:04 nadim_ joined 12:10 rurban left 12:14 Cabanossi left 12:16 Cabanossi joined, araraloren joined 12:19 zakharyas left
araraloren Is there any convenient way update value of Hash, just like `%h<x> = %h<x> // 'foo';` 12:21
lizmat %h<x> = "foo" ? 12:22
araraloren: not sure what you mean
araraloren sorry
If there key exists, I want update it 12:23
this
oh I'm a foolish.. :P 12:24
moritz %h<x> = 'foo' if %h<x>:exists; 12:28
lizmat araraloren: if they are always defined values in there, you can use 'with' 12:29
m: my %h = a => 42; $_ = 666 with %h<a>; dd %h
camelia Hash %h = {:a(666)}
araraloren oh, nice 12:30
12:30 domidumont left
araraloren thanks 12:30
My friend not describe the question correctly. sorry
[Coke] .
12:32 mson joined 12:33 rurban joined, aborazmeh joined, aborazmeh left, aborazmeh joined 12:34 rurban left
knight__ apropo my previous questions about execution plan. I am interested in some execution plan how interpreter interpretes data. For example when I have multiple inheritance, I would like to know how interpreter works, which method it will choose, which table of symbols will use. etc :-) I do not know how to say it english. 12:36
Some rules, how it works. 12:37
moritz knight__: classes have "Method Resolution Order", short MRO
knight__: it tells which order the classes are searched for when looking for methods
m: say Int.^mro 12:38
camelia ((Int) (Cool) (Any) (Mu))
moritz m: say IntStr.^mro
camelia ((IntStr) (Int) (Str) (Cool) (Any) (Mu))
moritz Perl 6 uses C3: en.wikipedia.org/wiki/C3_linearization
knight__ Thank you! 12:39
12:40 khw joined 12:44 Cabanossi left 12:45 bdmatatu joined 12:46 Cabanossi joined, COMBORICO joined, domidumont joined 12:52 perlpilot joined, domidumont left 12:54 darkmorph joined, domidumont joined 12:55 MasterDuke joined 12:58 COMBORICO left 12:59 cdg joined 13:00 cgfbee left 13:03 cdg left 13:12 mcmillhj joined, cdg joined 13:13 Cabanossi left 13:16 lowin left, Cabanossi joined 13:20 aborazmeh left, darkmorph left 13:21 aborazmeh joined, aborazmeh left, aborazmeh joined 13:26 ch3ck3r left 13:32 COMBORICO joined 13:43 napo1eon joined
wander m: say "11" ~~ /(\d) {} :my $c = $0; ($c)/; 13:46
camelia ｢11｣
0 => ｢1｣
1 => ｢1｣
COMBORICO Question: What does the perl method do: "say '2'.perl;". I know it returns "2", but I don't understand what is going on.
wander where can I see how code like `{} :my $c = $0;` works? 13:47
13:47 ChoHag left
wander COMBORICO, docs.perl6.org/routine/perl 13:48
COMBORICO Ty
geekosaur COMBORICO, it produces the perl source code needed to reproduce the expression. for a number or a string, it's just the number
or string
wander briefly, returns a Perlish representation of the object
COMBORICO Ty
13:49 domidumont left, zakharyas joined 13:50 domidumont joined 13:51 Guest38 joined, Guest38 left
geekosaur mhhh. think embedded code is only documented in the speculations :/ 13:51
the real docs are steering people to action objects 13:52
COMBORICO geekosaur, i read the link, but your explanation is clearer. Thank you.
13:52 cognominal joined
cognominal Mon histoire d´A avec les Rita Mitsouko finit mal. RIP Fred. www.youtube.com/watch?v=tPSyz7xweVc 13:54
oops
wrong channel
lizmat ah, l'erreur :-) 13:55
geekosaur wander, so closures in regexes are apparently only documented at design.perl6.org/S05.html#Bracket_r...nalization 13:58
and ':my' is documented in the middle of design.perl6.org/S05.html#Variable_...erpolation 14:00
I am wondering if those are going to be deprecated, since the docs point you to action objects instead 14:01
moritz no 14:03
14:09 Guest49 joined
wander geekosaur, thank you 14:09
14:10 Guest49 left, abraxxa left
wander so, for `"11" ~~ /(\d) {} :my $c = $0; ($c)/`, first I match "1", then run a block, which updates $/ 14:11
following `:my $c = 0;` which is how we declare inside a regex/token/rule
14:12 bwisti joined, aborazmeh left
wander interesting, for we never(?) declare a variable in this form anywhere else 14:13
14:14 Cabanossi left
geekosaur er? it's a normal declaration preceded by a colon 14:14
14:14 lowin joined
wander aha :P 14:15
m: :my $x = 42;
camelia 5===SORRY!5=== Error while compiling <tmp>
Two terms in a row
at <tmp>:1
------> 3:my7⏏5 $x = 42;
expecting any of:
infix
infix stopper
statement end
statement modifier
statement …
14:16 Cabanossi joined
geekosaur it may help to note that, in a regex, : normally stops backtracking (and both closures and :my also have that effect) 14:17
(closures, because it's kinda hard to run arbitrary code "in reverse" if you backtrack through it) 14:18
wander so such form is only used inside regex, is it? 14:19
geekosaur yes 14:20
rgeex is a separate language from perl 6 proper, although it allows limited embedding of perl 6 via closures
likewise strings are a separate language
perl 6 cleverly uses its own grammar facilities to allow switching languages on the fly 14:21
14:21 ChoHag joined
perlpilot
.oO( "my god, it's full of languages" )
 14:21
geekosaur hypothetically, someone could implement python as a perl 6 grammar and you could then put a block of python code in the middle of your program
(I think there was actually an effort to run perl 5 that way, but it stalled out back when rakudo was still using parrot?)
14:22 lowin left 14:23 troys joined, lowin joined
wander moritz, do we have other method to do the same thing like `/(\d) {} :my $c = $0; ($c)/`? ( We should have :-) ) 14:24
14:25 ChoHag left 14:26 nadim joined 14:27 nadim_ left
moritz wander: you mean /\d $0 / ? 14:29
m: say '1223' ~~ /(\d) $0 / 14:30
camelia ｢22｣
0 => ｢2｣
moritz m: say '1223' ~~ /$<alias>=(\d) ($<alias>) /
camelia Nil
moritz :(
wander yes 14:31
14:32 darkmorph joined
wander m: say '1223' ~~ /$<alias>=(\d) $<alias> /; say $0; 14:32
camelia ｢22｣
alias => ｢2｣
Nil
14:32 esh_ joined 14:33 bartolin joined, esh left
moritz how often do you actually need to capture the second bit, when you already know that it matches the same text as the first? 14:33
wander you're right. what i care about is the match, not the capture XD 14:35
14:35 ChoHag joined
jdv79 can a Pair's value be Nil? 14:35
moritz m: say (a => Nil).perl 14:36
camelia :a(Nil)
moritz jdv79: ^^ that was easy to answer :-)
jdv79 i asked the wrong question. why can't a hash's value be Nil? 14:37
Geth marketing: 305da3af38 | (Zoffix Znet)++ | 47 files
Add some decent open fonts to repo

To save time setting up when designing on new boxes...
lizmat m: my %h is default(Nil) = a => Nil; dd %h 14:38
camelia Hash %h = {:a(Nil)}
lizmat jdv79: ^^^
jdv79 oh, that makes sense
thanks
14:40 knight__ left
geekosaur the core issue is that, in an assignment, Nil usually means use the default value for the type. so you need the default to also be Nil 14:40
14:44 abraxxa joined 14:45 Cabanossi left
jdv79 i thought of that just before lizmat showed it 14:45
14:45 kyan joined
Geth doc: a30596e843 | (Alex Chen)++ (committed using GitHub Web editor) | doc/Language/regexes.pod6
Add example on Capture markers
 14:46
synopsebot Link: doc.perl6.org/language/regexes
jdv79 for an args hash being slipped into a constructor a default of Nil is useful
14:46 Cabanossi joined
wander maybe test defined? 14:48
m: say defined Nil; say defined Any;
camelia False
False
14:49 cdg left 14:50 Piotr_ left
jdv79 i'm talking about - "{..., k => $v ?? $v...whatever !! Nil,... } 14:51
15:00 mempko joined 15:04 Guest78 joined 15:06 callyalater joined 15:12 Guest78 left 15:13 Cabanossi left 15:16 Cabanossi joined
ugexe m: sub foo(*%_) { %_ }; my %hash = %( :a([1,2,3]), :b(1) ); say foo(%hash).perl # wonder if this error message can be improved 15:16
camelia Too many positionals passed; expected 0 arguments but got 1
in sub foo at <tmp> line 1
in block <unit> at <tmp> line 1
ugexe ah n/m, too early 15:17
15:18 araraloren left 15:19 Ven joined, AlexDaniel left, Ven is now known as Guest42207
callyalater m: say ""; sub postfix:<!>(Int $n) { [*] 2..$n }; say "{6!}"; 15:23
yoleaux 28 Oct 2017 04:35Z <Zoffix> callyalater: the quote braid bug is now fixed: c: HEAD $ = ""; sub postfix:<!> { [*] ^$^f+1}; say "{ 5! }"; Sorry it took longer to fix than original promised :)
camelia
720
callyalater Zoffix: Thank you! 15:24
15:32 kyan left 15:52 evalable6 left, evalable6 joined 15:58 Cabanossi left 15:59 mcmillhj left 16:01 Cabanossi joined 16:05 zakharyas left 16:06 mcmillhj joined 16:11 mcmillhj left 16:21 mcmillhj joined 16:23 cdg joined 16:28 mempko left 16:34 araujo joined, araujo left, araujo joined
AlexDaniel` squashable6: next 16:35
squashable6 AlexDaniel`, ⚠🍕 Next SQUASHathon in 3 days and ≈17 hours (2017-11-04 UTC-12⌁UTC+14). See github.com/rakudo/rakudo/wiki/Mont...Squash-Day
16:37 cognominal left, cognominal joined 16:39 cdg_ joined 16:42 cdg left 16:44 Cabanossi left 16:45 MasterDuke left 16:46 Piotr_ joined, Cabanossi joined 16:48 Guest42207 left 16:52 Coleoid joined 16:53 abraxxa left 16:54 Ven joined, Ven is now known as Guest45092 16:56 Guest45092 is now known as Ven``
lizmat nice objective for this Saturday's Squashathon: stackoverflow.com/questions/470171...umentation 16:58
timotimo hm, do we have a Pod::To::Markdown? :) 17:00
17:02 cdg_ left 17:03 zakharyas joined
Coleoid Hi, #perl6! I'm wrestling with NativeCalling a funky library. 17:03
The NativeCall docs specify that lib functions which return structs, must return them by reference, and I'm faced with a lib which does not. Do I have options beyond "rewrite those functions"?
17:04 cdg joined
timotimo if i remember correctly, returning structs is not properly standardised between ABIs or compilers or something? 17:04
hm, though of course we should support anything libffi and dyncall can. let's see if they support that 17:05
geekosaur Coleoid, or write a wrapper function 17:07
Coleoid That may be. The C folks on StackOverflow seem to believe it's defined, safe, and proper to return structs by value, and then they start listing caveats...
geekosaur passing structs and returning structs both have weirdness; C knows how to do it, but making an FFI do it is hard enough that many don't bother
timotimo looks like dyncall doesn't support it
hm, does libffi support it? 17:09
1.03 Oct-10-96
Passing struct args, and returning struct values works for
all architectures/calling conventions.
now how do we handle this ... a run time exception when trying to use a function with struct return type if moarvm is compiled with dyncall? 17:10
(that would probably also immediately trigger when precompiling a module with that in it 17:11
Coleoid geekosaur, I was thinking wrapper functions, too, if I can't avoid writing C with this project. 17:12
timotimo, I run up to the native call, and exit immediately without any message thereafter. So it gave me much better visibility than a precompile exception. 17:14
17:15 Cabanossi left
timotimo well, a precompile exception would not half-run the program if it's doomed 17:15
17:16 Cabanossi joined
Coleoid ...or, now I think you meant NativeCall doing its first-time precompile, and it's given helpful messages when I haven't built the signature. 17:16
timotimo m: use NativeCall; class Foo is repr<CStruct> { has int32 $.foo }; sub foo() returns Foo is native(Str) {*} 17:17
camelia ( no output )
timotimo m: use NativeCall; class Foo is repr<CStruct> { has int32 $.foo }; sub foo() returns Foo is native(Str) {*}; foo()
camelia Cannot locate symbol 'foo' in native library ''
in method setup at /home/camelia/rakudo-m-inst-1/share/perl6/sources/24DD121B5B4774C04A7084827BFAD92199756E03 (NativeCall) line 289
in method CALL-ME at /home/camelia/rakudo-m-inst-1/share/perl6/…
17:17 pmurias joined
timotimo huh, it allows a CStruct for "returns"? 17:17
m: use NativeCall; class Foo is repr<CStruct> { has int32 $.foo }; sub foo(--> Foo) is native(Str) {*}; foo()
camelia Cannot locate symbol 'foo' in native library ''
in method setup at /home/camelia/rakudo-m-inst-1/share/perl6/sources/24DD121B5B4774C04A7084827BFAD92199756E03 (NativeCall) line 289
in method CALL-ME at /home/camelia/rakudo-m-inst-1/share/perl6/…
Coleoid Yes, they just must be returned by reference. 17:18
timotimo ah crap, of course 17:19
Coleoid Another sad thing is this struct is three uint8s, so it would even fit into an int32 return value. Redefining the nativecall binding to do that didn't fool the runtime, though. :D
timotimo in that case i also don't know how to signal that ... "is structure-return" or similar
yeah, depending on your architecture returning an integer or a struct with a sufficiently small size can still be vastly different 17:20
17:22 setty1 joined
geekosaur has vs. HAS? 17:23
timotimo you can't put has or HAS in a sub signature
Coleoid Sounds right. Well, foo. Looks like wrapper functions, then.
geekosaur I meant in the CStruct
timotimo it'd also be possible to signal it like returns FlatStruct[Foo] (name up for debate)
that won't help 17:24
17:24 COMBORICO left, domidumont left 17:26 COMBORICO joined
COMBORICO Question: sub plus_three 17:28
El_Che the travis schrodinger build: it only builds when you're not looking
COMBORICO Nevermind. 17:30
Coleoid Hm, this library has Python and Lua bindings, so we know return-structs-by-value is solvable. I can just write my wrappers for now, though. Thanks, timotimo++ and geekasaur++. 17:31
geekosaur python makes you write C code to bind native libs anyway 17:32
(as does perl 5)
and for that matter lua
Geth doc: acea6c5f1b | (Alex Chen)++ (committed using GitHub Web editor) | doc/Language/regexes.pod6
Put section "Look-around assertions" to proper pos

Seems its author directly appends this doc with it.		 17:33
synopsebot Link: doc.perl6.org/language/regexes
17:33 robertle left 17:40 eugene_barsky joined
eugene_barsky hi 17:41
17:42 eugene_barsky left 17:44 Cabanossi left 17:46 Cabanossi joined
[Coke] tries to decipher that commit message. 17:51
17:52 troys is now known as troys_
[Coke] is very excited to see a skip test -> preamble change, though. :) 17:52
oh, I get it. moved the doc (but also did a lot of other stuff)
pmurias blogs.perl.org/users/pawel_murias/2...ittle.html # rakudo.js update 17:53
geekosaur yes, and accuses the doc's author of adding all new content near the end before the 'postamble' sections
ilmari or, allowing for imperfect grammar, just this section 17:55
appends -> appended 17:56
wander how do I report a bug on RT?
I've reached rt.perl.org, but got lost 17:57
[Coke] email [email@hidden.address] 17:58
github.com/rakudo/rakudo/wiki/rt-introduction
github.com/rakudo/rakudo/issues is also open (recently) 17:59
17:59 ChoHag left
wander got it 17:59
18:14 Coleoid left, cdg left 18:16 cdg joined, cdg left, cdg joined 18:17 lowin left 18:18 troys_ is now known as troys, TEttinger joined 18:26 mempko joined 18:29 Cabanossi left 18:31 Cabanossi joined 18:43 lowin joined, darutoko left
lizmat pmurias++ 18:48
18:50 ChoHag joined 18:51 COMBORICO left
ugexe m: Grammar.new 18:57
camelia P6opaque: no such attribute '@!list' in type Capture when trying to bind a value
in block <unit> at <tmp> line 1
18:58 Cabanossi left 19:01 Cabanossi joined 19:03 mcmillhj left 19:05 mcmillhj joined 19:06 Ven`` left 19:07 zakharyas left 19:08 bdmatatu left 19:10 cpage_ left, mcmillhj left, Thrush joined 19:12 Thrush left 19:13 mcmillhj joined 19:14 Thrush joined
Thrush I'm a little confused about the difference(s) between the '..' and '...' operators. 19:14
m: 'a87' ... 'b09' 19:15
camelia Potential difficulties:
Useless use of ... in sink context
at <tmp>:1
------> 3'a87' ...7⏏5 'b09'
Thrush m: ('a87' ... 'b09').say
camelia (a87 a88 a89 a77 a78 a79 a67 a68 a69 a57 a58 a59 a47 a48 a49 a37 a38 a39 a27 a28 a29 a17 a18 a19 a07 a08 a09 b87 b88 b89 b77 b78 b79 b67 b68 b69 b57 b58 b59 b47 b48 b49 b37 b38 b39 b27 b28 b29 b17 b18 b19 b07 b08 b09)
Thrush In the command "('a87' ... 'b09').say", why is "a77" and "a78" included? 19:16
19:17 MasterDuke joined
geekosaur it counts forward from a to b and backward from 8 to 0 and forward from 7 to 9 19:18
19:18 troys is now known as troys_ 19:19 espadrine joined
Thrush geekosaur, this is different than the behavior I'd expect, coming from a Perl5 background. Is there any way to emulate Perl5's behavior? 19:26
[Coke] Inline::Perl5 19:27
Not built in, as far as I know, no 19:28
geekosaur I thought there was amodule
the problem with the perl 5 one is it doesn;t generalize
it's a bundle of special cases for specific patterns and failure for anything that doesn;t fit those patterns 19:29
19:38 ChoHag left 19:40 cdg left 19:41 cdg joined 19:45 jonas1 left 19:46 cdg left 19:47 knight__ joined 19:48 wamba left, wamba joined 19:49 troys_ is now known as troys 19:50 ChoHag joined 19:51 Morfent joined
Thrush m: my @a = ['a98'] ; @a.push( @a[*-1].succ ) until @a[*-1] eq 'b09' 19:52
camelia ( no output )
Thrush m: my @a = ['a98'] ; @a.push( @a[*-1].succ ) until @a[*-1] eq 'b09'; @a.say
camelia [a98 a99 b00 b01 b02 b03 b04 b05 b06 b07 b08 b09]
Thrush It looks like " @a.push( @a[*-1].succ ) until @a[*-1] eq 'b09' " is one way to do it. 19:53
19:54 Mrofnet left 19:57 mr-foobar left 20:01 mr-foobar joined 20:03 Thrush left
timotimo that'd be much easier written as: 20:03
m: say "a98", *.succ ... "b09"
camelia (a98 a99 b00 b01 b02 b03 b04 b05 b06 b07 b08 b09)
timotimo dang, they had already left 20:06
El_Che timotimo: it looks like travis is hammered with evening 20:07
timotimo ?
El_Che build take a lot of time to start 20:08
and in my project it runs 1 subbuild at the time instead of the 4 or 5 it normally dies
timotimo i'm confused, why are you writing me this?
El_Che I am confused as well 20:09
wasn't meant to be specificaaly to you
to much tab magic, I guess
sorry
timotimo OK 20:10
geekosaur travis free tier is limited cpu time
El_Che indeed 20:14
20:15 Rawriful joined
El_Che it seem they only cap when busy. Like said, normally I get several subbuilds running at the same time 20:15
20:15 mingdao joined
geekosaur yep. all the paid folks having a productive monday :p (and the european ones probably pushing to it at the end of the work day, or maybe delaying it thinking they can avoid the rush --- but all delaying by about the same amount. I learned better than that a couple decades ago :) 20:16
El_Che hehe, true
20:22 mingdao left, Ven joined 20:23 Ven is now known as Guest9063
cxreg maybe interesting: evolvingavm.com/ 20:25
20:29 mingdao joined 20:33 COMBORICO joined
COMBORICO Question about immutable parameters. 20:35
sub plus-three( Int $number ) { $number += 3 }
my $value = 5;
say plus-three $value; #error: cannot assign to an immutable value
How is "say" modifying $value? 20:36
[Coke] get rid of the say; it's the call to the function that's modifying $number.
timotimo it's not
gfldex m: sub plus-three( Int $number ) { $number += 3 }; my $value = 5; plus-three $value;
camelia Cannot assign to an immutable value
in sub plus-three at <tmp> line 1
in block <unit> at <tmp> line 1
gfldex m: sub plus-three( Int $number is copy ) { $number += 3 }; my $value = 5; plus-three $value;
[Coke] you want $number is rw or $number is copy
camelia ( no output )
timotimo plus-three is assigning to $number, which is by default read-only becaues it's a parameter
callyalater m: sub plus-three( Int $number ) { $number += 3 }; my $value = 5; say plus-three $value;
camelia Cannot assign to an immutable value
in sub plus-three at <tmp> line 1
in block <unit> at <tmp> line 1
gfldex m: sub plus-three( Int $number is rw ) { $number += 3 }; my $value = 5; plus-three $value;
camelia ( no output )
callyalater m: sub plus-three( Int $number is rw ) { $number += 3 }; my $value = 5; say plus-three $value; 20:37
camelia 8
callyalater By default, I believe all parameters are read only unless specified otherwise with `is rw`.
m: sub plus-three( Int $number ) { $number += 3; return $number; }; my $value = 5; say plus-three $value; 20:38
camelia Cannot assign to an immutable value
in sub plus-three at <tmp> line 1
in block <unit> at <tmp> line 1
gfldex COMBORICO: see docs.perl6.org/type/Signature#Para..._Modifiers
callyalater m: sub plus-three( Int $number ) { $number += 3 }; my $value = 5; my $v = plus-three $value; say $v;
camelia Cannot assign to an immutable value
in sub plus-three at <tmp> line 1
in block <unit> at <tmp> line 1
callyalater m: sub plus-three( Int $number is rw) { $number += 3; return $number; }; my $value = 5; my $v = plus-three $value; say $v; 20:39
camelia 8
COMBORICO Okay. Thank you all for your help.
20:40 ChoHag left 20:47 AlexDaniel joined 20:52 cdg joined 20:53 cdg left 20:54 cdg joined 21:07 MasterDuke left 21:10 cdg_ joined 21:13 cdg left, mcmillhj left 21:17 ChoHag joined 21:19 raiph joined 21:23 wamba left 21:25 cono joined
cono m: class A::B { method hm { my class C {}; C.^name.say }; }; A::B.new.hm 21:25
camelia A::B::C
cono how to define C, outside of A::B namespace? 21:26
COMBORICO Does "is rw" stand for re-writable?
Juerd COMBORICO: read-write
COMBORICO: ro stands for read-only.
COMBORICO Thanks!
Juerd cono: Why are you putting it there if you don't want it there? 21:27
lizmat Juerd: I assume scoping 21:28
Juerd COMBORICO: Please note that in many cases, changing the caller's values is considered very bad style. It should, in general, only be used as a performance optimization when you really need it (for example, to prevent copying a huge string in memory). In most situations, returning the new value and having the caller do the assignment is easier to read and maintain. 21:29
COMBORICO: So usually you'd do sub plus-three(Int $number) { return $number + 3 }; my $value = 5; $value = plus-three $value; # Or of course, my $value = plus-three 5; 21:30
COMBORICO Roger that. I just NEED to know what things stand-for.
Juerd COMBORICO: Now that you mention it, that should probably be explained at docs.perl6.org/type/Signature#inde..._Modifiers 21:31
COMBORICO: Would you mind opening a github issue for that?
COMBORICO I'm still meditating on thing i wrote earlier. Yup, I've been meditating on this page. 21:32
lizmat so what do you need to go to see the actual code on code-golf.io/ ?
cono Juerd: I'm using GraphQL module, which accepts class with name: Query, but I want to pass in this class Config class and other stuff which I need. That's why I thought that I create wrapper class which clousring Config inside of Query class
it doesn't work with A::B::Query
it neeeds to be Query without namespaces
Juerd cono: That typically means it's assuming you'll subclass Query, or if Query is a role, implement a class that "does Query;" 21:33
cono if I subclass from Query, the ^name will change
which again breaks internal GraphQL logic
Juerd If GraphQL uses .^name for a type check, that may be a design flaw in the module :( 21:34
21:34 epony left
cono I understand but this is what I have :) 21:34
github.com/CurtTilmes/Perl6-GraphQ...QL.pm#L273
COMBORICO Juerd, hahaha i don't even know what a github issue is.
Juerd COMBORICO: Do you know what github is though? :) 21:35
COMBORICO Yes.
gfldex COMBORICO: it's a convenient way to complain :->
Juerd COMBORICO: "Issues" is the built-in issue tracker, or bug tracker if you will, that authors can get with any Git repository hosted on Github. 21:36
COMBORICO Juerd, were you speaking of complaining about rw?
Juerd COMBORICO: Yes
At the bottom of docs.perl6.org/type/Signature there is a link "Please report any issues"
COMBORICO I see. I will do it. Now to remember my password . . . 21:37
Juerd COMBORICO: Great, thank you!
cono: I don't recognise in that line why the class would have to be named Query though 21:38
cono because after that we are adding this here: github.com/CurtTilmes/Perl6-GraphQ...QL.pm#L184 21:39
Juerd cono: I think the best work-around is to simply declare a global class instead of the lexical (my) one.
cono and when graphql request coming, it matches Query to the ^name 21:40
Juerd: and how to pass my config into this global class?
Juerd cono: Maybe a class attribute? That's a fancy name for a global variable that lives in the class, but because it has a fancy name and lives in the namespace it's not nearly as gross as a regular global variable :D 21:41
21:41 troys is now known as troys_
Juerd cono: class Query { our $.config; ... }; Query.config = ...; 21:42
cono attributes of the Query class will be expoed to the API :(
Juerd Then the gross solution... our $config; class Query { ... }; $config = ...; 21:43
It really sounds like GraphQL should use .^name only as a fallback if no name is provided in another way.
cono I'm thinking about defining my custom class, and inherit top Query from my custom one..
ugexe m: class Foo { submethod TWEAK(|) { self.HOW does role :: { method name(|) { q|Query| } }; } }; say Foo.new.^name # hehe 21:44
camelia Query
cono Juerd: totally agree with you
Juerd ugexe: Nice hack.
ugexe: I wonder how much other stuff would break :)
21:45 Cabanossi left
ugexe if its matching on $t.^name already, I imagine it should just work since it saves the $t alongside the $t.^name 21:46
21:46 Cabanossi joined, grumble left
lizmat and another Perl 6 Weekly hits the Net: p6weekly.wordpress.com/2017/10/30/...-mastered/ 21:47
ugexe if its doing something like $t.^name.new(...) then it'd break down
21:47 grumble joined
cono nope. no object creation at all: github.com/CurtTilmes/Perl6-GraphQ...on.pm#L468 21:48
knight__ hmm
interesting
cono just taking package on method and invoking it
21:51 aindilis left 21:56 epony joined
raiph .tell eugene_barsky er, hi. (better late than never...) :) In answer to your SO, aiui, almost anything that makes #perl6 a great place to experience P6 is on topic. 21:57
yoleaux 25 Oct 2017 06:25Z <moritz> raiph: thanks, answered
raiph: I'll pass your message to eugene_barsky.
raiph m: say 'hi eugene' # write m: plus perl 6 code to run it via a bot that uses a rakudo compiler on a MoarVM backend 22:04
camelia hi eugene
22:05 Guest9063 left 22:14 setty1 left 22:18 aindilis joined, pmurias left 22:21 ggoebel left 22:23 Aaronepower left
COMBORICO As a new programmer in general but coming from C++, so far the steepest learning-curve has been Perl 6's default immutable parameter (compared to C++ default is mutable). 22:24
22:24 Ven joined, Piotr_ left 22:25 Ven is now known as Guest73995
COMBORICO It took me an hour or more to understand what was going on! 22:25
lizmat perhaps we need a "coming from C++ traps" doc 22:26
I mean, we have for Haskell: docs.perl6.org/language/haskell-to-p6 22:27
Python: docs.perl6.org/language/py-nutshell 22:28
Ruby: docs.perl6.org/language/rb-nutshell
and several aspects when coming from Perl 5
22:29 Cabanossi left 22:31 Cabanossi joined
COMBORICO I have no programming experience so I'm not a good judge if yea or nay for that. 22:31
I just could not understand (still don't) why a person would want to have the parameter to be defaulted to const. 22:32
So that kept me thinking that i was understanding what i was reading incorrectly. 22:33
Juerd COMBORICO: Because it's considered bad style to mutate the arguments. It's possible because sometimes it's needed or the easy way out, but generally it's a bad idea.
lizmat COMBORICO: perhaps what you're looking for is "is copy" ? 22:34
COMBORICO But isn't C++ default to mutate parameters?
lizmat or do you really want your changes to be visible in the caller as well ?
22:34 ggoebel joined
COMBORICO I understood what was going on from this link: 22:35
www.reddit.com/r/ProgrammingLangua...ers_being/
perlawhirl I have a question about Range.sum() it does a 'self.int-bounds || nextsame;'... the nextsame jumps to Any.sum()... which iterates the invocant and sums each iteration 22:36
which means trying to sum an infinite range doesn't terminate... i'm trying to think...
22:36 Thrush joined
perlawhirl besides infinte ranges, what other ranges will fail int-bounds... and is there any reason why Range.sum() shouldn't just check for is-lazy() and fail if True? 22:36
Juerd COMBORICO: It looks like C++ defaults to "is copy": juerd.nl/i/e252132fe377471bb3400aa9ff64a423.png 22:37
Thrush How do I concatenate two arrays in Perl 6? I'm looking for something like: my @c = @a + @b;
lizmat perlawhirl: it probably should, please provide an example and make a Github Issue :-)
Juerd Thrush: Arrays are not concatenated, but to add the elements from one array to the other, use append (or push with list flattening) 22:38
perlawhirl cool lizmat... while i've got your attention, and on the subject of int-bounds... re: RT131846
synopsebot RT#131846 [open]: rt.perl.org/Ticket/Display.html?id=131846 [BUG] [REGRESSION] not accepting Inf/Whatever as upper bound
perlawhirl an obvious fix would be to change '$ofrange.int-bounds(my int $i, my int $to)' to '(my (int $i, int $to) = $ofrange.int-bounds || ($ofrange.head, $elems))' 22:39
performance hit seems minimal... does it look ok to you on the face of it?
Thrush m: my @a = 1..3; my @b = <a b c>; (my @c = @a).append(@b); @c.perl.say
Juerd Thrush: To create a new list containing the array elements of an array, use "flat" or "|", e.g. "my @c = flat @foo, @bar;" or "my @c = |@foo, |@bar;"
camelia [1, 2, 3, "a", "b", "c"]
COMBORICO Juerd, thanks! I need to meditate on these terms. My head is starting to spin. Ha.
Thrush m: my @a = 1..3; my @b = <a b c>; my @c = flat @foo, @bar; 22:40
lizmat perlawhirl: looking
camelia 5===SORRY!5=== Error while compiling <tmp>
Variable '@foo' is not declared
at <tmp>:1
------> 3a = 1..3; my @b = <a b c>; my @c = flat 7⏏5@foo, @bar;
Thrush m: my @a = 1..3; my @b = <a b c>; my @c = flat @a, @b;
camelia ( no output )
Juerd COMBORICO: Basically, in C++ it will mutate a private copy of the argument that was passed, so the result is not visible in the outer scope.
Thrush m: my @a = 1..3; my @b = <a b c>; my @c = flat @a, @b; @c.perl.say
camelia [1, 2, 3, "a", "b", "c"]
perlawhirl lizmat: sorry, should have linked specific line: github.com/rakudo/rakudo/blob/b07e...t.pm#L1123 22:41
Juerd COMBORICO: So basically, "Int $foo is ro" translates to "const int foo", "Int $foo is rw" translates to "int &foo", "Int $foo is copy" translates to "int foo" 22:42
Thrush Here's a question: I have an array @a (set to, say [1,2,3]) and I want to get the product of itself with itself. I can do: my @b = @a X @a; But then let's say I want to get a product of @b with @a, like this: my @c = @b X @a;
m: my @a = [1,2,3]; my @b = @a X @a; my @c = @b X @a; @c.perl.say 22:43
camelia [($(1, 1), 1), ($(1, 1), 2), ($(1, 1), 3), ($(1, 2), 1), ($(1, 2), 2), ($(1, 2), 3), ($(1, 3), 1), ($(1, 3), 2), ($(1, 3), 3), ($(2, 1), 1), ($(2, 1), 2), ($(2, 1), 3), ($(2, 2), 1), ($(2, 2), 2), ($(2, 2), 3), ($(2, 3), 1), ($(2, 3), 2), ($(2, 3), 3)…
Juerd Thrush: An easier way to print variables for debugging is "dd". It also gives more detail.
Thrush m: my @a = [1,2,3]; my @b = @a X @a; my @c = @b X @a; dd @c; dd @a X @a X @a
camelia Array @c = [($(1, 1), 1), ($(1, 1), 2), ($(1, 1), 3), ($(1, 2), 1), ($(1, 2), 2), ($(1, 2), 3), ($(1, 3), 1), ($(1, 3), 2), ($(1, 3), 3), ($(2, 1), 1), ($(2, 1), 2), ($(2, 1), 3), ($(2, 2), 1), ($(2, 2), 2), ($(2, 2), 3), ($(2, 3), 1), ($(2, 3), 2), (…
Juerd Things with long output are probably better tested locally :D 22:44
Thrush I notice that the elements of @c are in the nested form of [[a,b], c] instead of [a,b,c] (like I would get with @a X @a X @a). How can I get the [a,b,c] form? 22:45
m: my @a = [1,2,3]; my @b = @a X @a; my @c = @b X @a; dd @a X @a X @a
camelia ((1, 1, 1), (1, 1, 2), (1, 1, 3), (1, 2, 1), (1, 2, 2), (1, 2, 3), (1, 3, 1), (1, 3, 2), (1, 3, 3), (2, 1, 1), (2, 1, 2), (2, 1, 3), (2, 2, 1), (2, 2, 2), (2, 2, 3), (2, 3, 1), (2, 3, 2), (2, 3, 3), (3, 1, 1), (3, 1, 2), (3, 1, 3), (3, 2, 1), (3, 2, 2…
timotimo m: my @a = <a b c>; my @b = <x y z>; my @result = flat @a, @b; say @result.perl 22:47
camelia ["a", "b", "c", "x", "y", "z"]
COMBORICO Jeurd, i will write that in my textbook. I'm still not getting it 100%, but I'm close. Thanks for the help.
Juerd COMBORICO: You're welcome 22:48
22:52 sena_kun left
COMBORICO Juerd, You're sure read-write means constant, right? 22:52
Juerd COMBORICO: No, constant == read-only aka immutable
COMBORICO I thought read-write would mean able to write. And const means not able to write. 22:53
So why does rw == const? 22:54
Juerd COMBORICO: That is not the case.
COMBORICO: Where does it say that rw is const?
COMBORICO Ahh! I miswrote it!
Juerd rw is more like passing a value by reference, like "void mutate(int &ref) { ... }" in C++
22:55 mcmillhj joined
COMBORICO Right, okay. Too much reading today, i guess. 22:55
"is copy" is call-by-value, right? 22:57
22:58 Cabanossi left
Juerd Yes. It creates a local copy of the value that can be mutated, but the changes won't be made to the value in the caller's scope. 22:58
lizmat "is copy" is call-by-value *but* also creates a local container so you can change it locally
Juerd++ # faster :-) 22:59
22:59 darkmorph left
Juerd lizmat: Lots and lost of typing-speed-test.aoeu.eu/ :) 22:59
s/lost/lots/ # still not enough apparently.
lizmat feels lots every now and then as well :-)
COMBORICO Lizmat, I'll add that to my notes. 23:00
23:00 aindilis left 23:01 Cabanossi joined
COMBORICO So Perl 6's default for parameters again is . . . ro (const), right? 23:04
Juerd Yes
COMBORICO Whew! Time to take a break! Haha. Thanks for the help, you two! My textbook credits you both! 23:05
23:05 Guest73995 left
timotimo oh be aware that the copy "is copy" makes is extremely shallow :) 23:06
lizmat perlawhirl: testing a fix for RT #131846 now 23:07
synopsebot RT#131846 [open]: rt.perl.org/Ticket/Display.html?id=131846 [BUG] [REGRESSION] not accepting Inf/Whatever as upper bound
[Coke] Should protoregex be one word or two? 23:08
lizmat m: proto regex foo { } 23:09
camelia 5===SORRY!5===
Null regex not allowed
at <tmp>:1
------> 3proto regex foo { 7⏏5}
Proto regex body must be {*} (or <*> or <...>, which are deprecated)
at <tmp>:1
------> 3proto regex 7⏏5foo { }
lizmat m: protoregex foo { }
camelia 5===SORRY!5=== Error while compiling <tmp>
Undeclared routines:
foo used at line 1
protoregex used at line 1
lizmat two I guess ?
[Coke] in prose, I mean. so 'protoregex' isn't code, so I'm guessing it should be 2 words in prose.
23:09 Herby_ joined
Herby_ \o 23:09
Just read the weekly 23:10
everyone++ for the 2017.10 release
23:12 troys_ is now known as troys 23:14 nadim left
knight__ hmm, What shall I read to know what is the meaning of word like graphemes...? 23:14
lizmat en.wikipedia.org/wiki/Grapheme
knight__ ok, some linguistic books:-) 23:15
23:15 darkmorph joined
lizmat tl;dr: what a human thinks a character is 23:15
perlawhirl: github.com/rakudo/rakudo/commit/bdc73563f4 23:16
23:16 mcmillhj left
perlawhirl lizmat++ thanks so much! 23:17
[Coke] f
lizmat sorry for it falling through the cracks
[Coke] whoops 23:18
23:18 mcmillhj joined
perlawhirl lizmat: no probs 23:20
Thrush If I have @a = [1,2,3]; and @b = @a X @a; how can I combine @b and @a to make a @c that is the same as @a X @a X @a ? I would think @c = @b X @a; but that gives a different answer. 23:22
m: my @a = [1,2,3]; my @product = @a X @a X @a; dd @product
camelia Array @product = [(1, 1, 1), (1, 1, 2), (1, 1, 3), (1, 2, 1), (1, 2, 2), (1, 2, 3), (1, 3, 1), (1, 3, 2), (1, 3, 3), (2, 1, 1), (2, 1, 2), (2, 1, 3), (2, 2, 1), (2, 2, 2), (2, 2, 3), (2, 3, 1), (2, 3, 2), (2, 3, 3), (3, 1, 1), (3, 1, 2), (3, 1, 3), (3…
Thrush m: my @a = [1,2,3]; my @b = @a X @a; my @c = @b X @a; dd @c 23:23
camelia Array @c = [($(1, 1), 1), ($(1, 1), 2), ($(1, 1), 3), ($(1, 2), 1), ($(1, 2), 2), ($(1, 2), 3), ($(1, 3), 1), ($(1, 3), 2), ($(1, 3), 3), ($(2, 1), 1), ($(2, 1), 2), ($(2, 1), 3), ($(2, 2), 1), ($(2, 2), 2), ($(2, 2), 3), ($(2, 3), 1), ($(2, 3), 2), (…
Thrush See? Not the same.
timotimo yup
m: my @a = [1,2,3]; my @b = @a X @a; my @c = @b X @a; @c = @c.map({ flat $_[0].List, $_[1] }); dd @c 23:24
camelia Array @c = [(1, 1, 1).Seq, (1, 1, 2).Seq, (1, 1, 3).Seq, (1, 2, 1).Seq, (1, 2, 2).Seq, (1, 2, 3).Seq, (1, 3, 1).Seq, (1, 3, 2).Seq, (1, 3, 3).Seq, (2, 1, 1).Seq, (2, 1, 2).Seq, (2, 1, 3).Seq, (2, 2, 1).Seq, (2, 2, 2).Seq, (2, 2, 3).Seq, (2, 3, 1).Seq,…
timotimo m: my @a = [1,2,3]; my @b = @a X @a; my @c = @b X @a; @c = @c.map({ (flat $_[0].List, $_[1]).List }); dd @c
camelia Array @c = [(1, 1, 1), (1, 1, 2), (1, 1, 3), (1, 2, 1), (1, 2, 2), (1, 2, 3), (1, 3, 1), (1, 3, 2), (1, 3, 3), (2, 1, 1), (2, 1, 2), (2, 1, 3), (2, 2, 1), (2, 2, 2), (2, 2, 3), (2, 3, 1), (2, 3, 2), (2, 3, 3), (3, 1, 1), (3, 1, 2), (3, 1, 3), (3, 2, 1…
Thrush I can do this: my @a = [1,2,3]; my @b = @a X @a; my @c = (@b X @a).map({|$_[0], $_[1]}); dd @c 23:25
m: my @a = [1,2,3]; my @b = @a X @a; my @c = (@b X @a).map({|$_[0], $_[1]}); dd @c
camelia Array @c = [(1, 1, 1), (1, 1, 2), (1, 1, 3), (1, 2, 1), (1, 2, 2), (1, 2, 3), (1, 3, 1), (1, 3, 2), (1, 3, 3), (2, 1, 1), (2, 1, 2), (2, 1, 3), (2, 2, 1), (2, 2, 2), (2, 2, 3), (2, 3, 1), (2, 3, 2), (2, 3, 3), (3, 1, 1), (3, 1, 2), (3, 1, 3), (3, 2, 1…
Thrush But is there a simpler way?
Is there any way to convert the 'X' infix operator to a regular method? 23:27
I tried [email@hidden.address] but that doesn't work.
timotimo m: say &METAOP_CROSS 23:28
camelia sub METAOP_CROSS (\op, &reduce) { #`(Sub|34398544) ... }
Thrush For that matter, is there any way to convert any infix operator (like, say, '+') to a method? For example, I want to call "4+5" as "4.+(5)". Can that be done? 23:29
timotimo you can by using its full name
m: say 1.&infix:<+>(2);
camelia 3
lizmat m: say 1.&[+](3) # shorter
camelia 4
timotimo m: say &[X] 23:30
camelia sub infix:<X> (| is raw) { #`(Sub+{is-pure}+{Precedence}|31444240) ... }
timotimo neat.
Juerd I don't think that'll make it easier, though.
timotimo heads out
m: say &[X](<a b c>, <2 3>, <☺ ☹>); 23:31
camelia ((a 2 ☺) (a 2 ☹) (a 3 ☺) (a 3 ☹) (b 2 ☺) (b 2 ☹) (b 3 ☺) (b 3 ☹) (c 2 ☺) (c 2 ☹) (c 3 ☺) (c 3 ☹))
Juerd I would have expected something simple like [X] |@b, @a to work but I really don't understand what that does, apparently
timotimo that'll put the contents of @b into the same argument list that @a is put into 23:32
Juerd Is there any syntax to get the [0]s of a list, then the [1]s, then the [2]s, etc?
timotimo depending on what's inside @b at that point, it's probably wrong :)
m: my @lists = <a b c>, <d e f>, <g h i>; say [Z] |@lists; 23:33
camelia ((a d g) (b e h) (c f i))
timotimo only works properly if @lists has at least two elements i believe
Juerd @c = [X] @b»[0], @b»[1], @a works but hard coding indices feels wrong :) 23:34
m: my @a = [1,2,3]; my @b = @a X @a; my @c = [X] |([Z] |@b), @a; dd @c; 23:35
camelia Array @c = [(1, 1, 1), (1, 1, 2), (1, 1, 3), (1, 2, 1), (1, 2, 2), (1, 2, 3), (1, 3, 1), (1, 3, 2), (1, 3, 3), (1, 1, 1), (1, 1, 2), (1, 1, 3), (1, 2, 1), (1, 2, 2), (1, 2, 3), (1, 3, 1), (1, 3, 2), (1, 3, 3), (1, 1, 1), (1, 1, 2), (1, 1, 3), (1, 2, 1…
Juerd Oh my.
23:35 espadrine left
Juerd That's ugly :) 23:35
23:36 espadrine joined
Juerd Would be slightly prettier if you could write something like @b.zip instead of [Z] |@b 23:37
23:37 mcmillhj left
Thrush The reason I want @a X @a to be done, THEN Xed with @a again is because in my code I'm doing an array product, then filtering (with grep) then doing a product again. 23:37
I want to get something like @a X @a X @a, but instead I'm getting something like [@a X @a] X @a. 23:38
Juerd Thrush: Is the [X] |([Z] |@b), @a what you wanted?
Thrush So how do I undo the "[]" part of [@a X @a] x @a ?
Juerd: Let me check real quick... 23:39
Juerd: I notice that that returns lots of elements. I only want 3*3*3 elements (27), which is the number that @a X @a X @a returns. 23:40
m: (@a X @a X @a).elems.say; ([X] |([Z] |@b), @a).elems.say 23:41
camelia 5===SORRY!5=== Error while compiling <tmp>
Variable '@a' is not declared
at <tmp>:1
------> 3(7⏏5@a X @a X @a).elems.say; ([X] |([Z] |@b)
Thrush m: my @a = [1,2,3]; (@a X @a X @a).elems.say; ([X] |([Z] |@b), @a).elems.say
camelia 5===SORRY!5=== Error while compiling <tmp>
Variable '@b' is not declared
at <tmp>:1
------> 3; (@a X @a X @a).elems.say; ([X] |([Z] |7⏏5@b), @a).elems.say
Thrush m: my @a = [1,2,3]; (@a X @a X @a).elems.say; my @b = @a X @a; ([X] |([Z] |@b), @a).elems.say 23:42
camelia 27
243
Thrush That's 27 elements vs. 243 elements.
Juerd: That's 27 elements vs. 243 elements. So, not quite what I was looking for.
Juerd 3³ vs 3⁵
Thrush Juerd: Yes. Not sure why, though. 23:43
Juerd Neither am I
23:43 Cabanossi left, mcmillhj joined 23:45 piojo1 joined
Thrush Juerd: I've come up with this: (@b X @a).map( {|$_[0], $_[1]} ); but it seems a bit too wordy. 23:45
Juerd Because @a X @a is not 3 elements, it's 9.
23:45 piojo left
Thrush m: my @a = [1,2,3]; my @b = @a X @a; my @c = (@b X @a).map( {|$_[0], $_[1]} ); dd @c 23:45
camelia Array @c = [(1, 1, 1), (1, 1, 2), (1, 1, 3), (1, 2, 1), (1, 2, 2), (1, 2, 3), (1, 3, 1), (1, 3, 2), (1, 3, 3), (2, 1, 1), (2, 1, 2), (2, 1, 3), (2, 2, 1), (2, 2, 2), (2, 2, 3), (2, 3, 1), (2, 3, 2), (2, 3, 3), (3, 1, 1), (3, 1, 2), (3, 1, 3), (3, 2, 1…
Thrush m: my @a = [1,2,3]; my @b = @a X @a; my @c = (@b X @a).map( {|$_[0], $_[1]} ); @c.elems.say
camelia 27
23:46 Cabanossi joined, cdg joined
Geth doc/master: 12 commits pushed by (Will "Coke" Coleda)++
review: github.com/perl6/doc/compare/acea6...a10c20d447		 23:47
23:48 rindolf left, cdg_ left 23:50 cdg left 23:52 callyalater left 23:53 knight__ left, schelcj joined
Juerd Thrush: I give up 23:55
lizmat perhaps a GH Issue is in order ?
Thrush Thanks for trying, Juerd. I appreciate it. 23:57
I gotta go. But thanks for all your help.
23:57 Thrush left, mcmillhj left
Juerd lizmat: Maybe more a stackoverflow or perlmonks thing 23:58
lizmat maybe

Powered by Cro and the Raku® Programming Language.

Please report any issues / comments / feature requests as an issue on App::Raku::Log.

Thank you!