»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.
Skarsnik m: my uint32 $u32; $u32 = -4; say $u32; 00:00
camelia rakudo-moar 6a8278: OUTPUT«4294967292␤»
Skarsnik m: my uint32 $u32 = 0; $u32 -= 5; say $u32;
camelia rakudo-moar 6a8278: OUTPUT«4294967291␤»
Skarsnik I think all intxx and uintxx are not equal on constraint 00:01
tbrowder p6: my uint64 $n = 232; say sprintf "%0x", $n
camelia rakudo-moar 6a8278: OUTPUT«e8␤»
Skarsnik m: my uint64 $u64 = 0; $u64 -= 5; say $u64;
camelia rakudo-moar 6a8278: OUTPUT«-5␤»
Skarsnik probably a bug
tbrowder say UINT_MAX
p6: say UINT_MAX 00:02
camelia rakudo-moar 6a8278: OUTPUT«5===SORRY!5=== Error while compiling <tmp>␤Undeclared name:␤ UINT_MAX used at line 1␤␤»
tbrowder p6: say UINT32_MAX 00:03
camelia rakudo-moar 6a8278: OUTPUT«5===SORRY!5=== Error while compiling <tmp>␤Undeclared name:␤ UINT32_MAX used at line 1␤␤»
tbrowder p6: my uint32 $n = 0xffffffffffffffff; say $n 00:05
camelia rakudo-moar 6a8278: OUTPUT«4294967295␤»
tbrowder p6: my $uint32-max= 0xffffffffffffffff; my $x = -4; my $xuint = $uint32-max + $x + 1; say sprintf "%x", $xuint 00:09
camelia rakudo-moar 6a8278: OUTPUT«fffffffffffffffc␤»
tbrowder okay, i think i may know how to do it 00:10
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timotimo oh hey Skarsnik 00:21
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skids m: my $f = Channel.new; start { react { whenever $f { .say; $f.close; } }; "done".say }; sleep 1; $f.send(42); sleep 1;' 03:34
camelia rakudo-moar 6a8278: OUTPUT«5===SORRY!5=== Error while compiling <tmp>␤Unable to parse expression in single quotes; couldn't find final "'" ␤at <tmp>:1␤------> 3".say }; sleep 1; $f.send(42); sleep 1;'7⏏5<EOL>␤ expecting any of:␤ single quotes␤ …»
skids m: my $f = Channel.new; start { react { whenever $f { .say; $f.close; } }; "done".say }; sleep 1; $f.send(42); sleep 1;
camelia rakudo-moar 6a8278: OUTPUT«42␤done␤»
skids m: my $f = Channel.new; my $g = Channel.new; start { react { whenever $f { .say; $g.close; }; whenever $g { .say } }; "done".say }; sleep 1; $f.send(42); $g.send(1); sleep 1;
camelia rakudo-moar 6a8278: OUTPUT«42␤1␤»
dj_goku anyone else noticing a lot of fuzzy testing lately? 03:46
I think I have seen 3-4 posts on reddit/hacker news about people fuzzing an app or language. 03:47
timotimo hack.p6c.org/~timo/ :P 03:48
dj_goku lol nice 03:51
timotimo: prior to the recent trend 03:52
timotimo oh, yes
that's true
dj_goku timotimo: is there a reason this isn't done periodically?
btw all I see is numbers not sure what it all means.
timotimo hehe 03:53
yeah, it doesn't mean terribly much
if i really "meant it", i'd write a custom harness that makes it unnecessary to launch a full moar process for each single test case
also, this fuzzing is only for loading (and other fuzzing runs for running) .moarvm files 03:54
with a start-up time of about 0.1 seconds, it's kind of hard to fuzz rakudo with strings for programs
though perhaps i'll give that a try some time :D
dj_goku :D 03:56
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timotimo here's something mildly interesting 04:04
bind_key is somewhat expensive during startup
(from MVMHash) 04:05
28 strings have more than 100 occurences during startup
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timotimo the "long tail" after that is 5389 different strings 04:06
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timotimo 1778 of those only occur once 04:06
now, it doesn't seem like we're storing the hash code in a string object after calculating it 04:07
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dj_goku all greek to me. :D 04:08
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timotimo oh, huh 04:10
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timotimo seems like perhaps we *are* using the cached hash code ... somehow 04:11
but we're not using the hash code for MVMHash ?!? 04:12
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timotimo callgrind seems to think we spend most of our time allocating bits of memory through malloc, then deserialization (first place being serialization_read_int, second place being serialization_read_ref), then validating static frames, then binding data to hash keys, then doing running in the interpreter itself, then allocating stuff in the old generation, then allocating stuff in the garbage collector "in 04:26
general", then more validation of bytecode, then more deserialization
but going by inclusive, the work_loop function (which is what does deserialization) really is a very expensive thing 04:27
even though validate_static_frame is one of the more expensive functions "self"-wise, it's very low in the ranking when it comes to inclusive timings 04:28
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MasterDuke timotimo: have you ever re-run your coverage report? 04:33
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timotimo not recently. i'm farther past bedtime than i've been in many, many weeks. remind me again after i've had some sleep? :) 04:40
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MasterDuke will do. and speaking of coverage and fuzzing and such, has anybody seen if coverity or pvs-studio will do a free analysis of MoarVM? they've done a bunch of other open-source stuff projects (e.g., WINE, Libre Office) 04:42
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timotimo MasterDuke: irclog search reveals that we've had a few changes in moar due to coverity scans already 06:01
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timotimo moritz: requesting support for "literal" matches; i can't search for "coverity" in #perl6 06:02
moritz: because it finds everything that has "cover" in it, apparently
MasterDuke: github.com/MoarVM/MoarVM/commit/688eecdd22 - example 06:03
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timotimo .tell [ptc] were you the one who got coverity for moarvm? 06:17
yoleaux timotimo: I'll pass your message to [ptc].
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timotimo MasterDuke: scan.coverity.com/projects/paultcochrane-moarvm 06:20
last analyzed was sep 02 2015, but i guess you can just hit the "add me to project" button if you want to put a new scan up, MasterDuke? 06:21
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ufobat what does the * in '... method new($x){ self.bless(*, :$x)} ...' mean? 06:52
timotimo it means your code is out of date and needs you to remove the "*, " from it :)
ufobat and what did it mean? :) 06:53
benjikins How do I check if a string contains any element in an array
in the shortest possible way
timotimo it meant nothing
ufobat yay :D
timotimo benjikins: you can try $mystring.contains(any(@foobar))
benjikins I didn't realize I could use any that way
thank you
timotimo m: my @pieces = <hello world how are you>; say "oh well this is weird".contains(any(@pieces))
camelia rakudo-moar 6a8278: OUTPUT«any(False, False, False, False, False)␤»
timotimo m: my @pieces = <hello world how are you>; say so "oh well this is weird".contains(any(@pieces))
camelia rakudo-moar 6a8278: OUTPUT«False␤»
timotimo m: my @pieces = <hello world how are you>; say so "oh well this is world".contains(any(@pieces)) 06:54
camelia rakudo-moar 6a8278: OUTPUT«True␤»
timotimo m: my @pieces = <hello world how are you>; say "oh well this is world".contains(any(@pieces))
camelia rakudo-moar 6a8278: OUTPUT«any(False, True, False, False, False)␤»
timotimo junctions are cool that way.
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smls m: say "aaa {("bbb" for ^3)} ccc" 07:26
yoleaux 26 Aug 2016 21:58Z <tbrowder> smls: thanks! the "+$0" did the trick
camelia rakudo-moar 6a8278: OUTPUT«aaa bbb bbb bbb ccc␤»
smls m: say "aaa {"bbb" for ^3} ccc"
camelia rakudo-moar 6a8278: OUTPUT«Use of Nil in string context in block <unit> at <tmp> line 1␤aaa ccc␤»
smls ^^ Why does the for loop not return a value without parens there?
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smls m: say "aaa {"bbb" if 1} ccc" 07:27
camelia rakudo-moar 6a8278: OUTPUT«aaa bbb ccc␤»
smls ^^ works for `if` but not `for`
TimToady loops at statementlist level are autosunk because people don't expect them to suddenly be lazy 07:30
yoleaux 25 Aug 2016 11:10Z <ab6tract> TimToady: do you by any chance have the notes for your ballistic programming talk(s) online?
smls TimToady: Ah, so {} in strings is statement-list context like a sub 07:31
TimToady m: say "aaa {do "bbb" for ^3} ccc"
camelia rakudo-moar 6a8278: OUTPUT«aaa bbb bbb bbb ccc␤»
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TimToady do also works 07:32
smls oh, didn't know one could `do` a statement modifier
TimToady it's just a block, so there's a sequence of statements expected
do is a statement prefix
and modifier is part of a statement
it actually parses do ("bbb" for ^3) 07:33
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smls TimToady: In the case of {} in strings, it wouldn't make the loop lazy though 07:46
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smls as it is immediately stringified 07:47
and I don't thing there's a use-case where you'd *want* to interpolate Nil into a string, as it just throws a warning 07:48
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moritz \o 08:09
timotimo o/ moritz
i highlighted you instead of .tell; is that okay?
moritz timotimo: it's OK; an issue on github.com/moritz/ilbot/issues would have been even better :-) 08:11
timotimo ah, i didn't realize the ilbot repo would also be the right spot for the html pages
smls Does anyone know a "try Perl 6 online" thing that runs Perl 6.c?
ideone.com runs ancient parrot-based rakudo 08:12
timotimo did you see the pull request MasterDuke made to your ilbot repo?
moritz timotimo: the problem is that the search index I use goes through a stemmer, so a substring search on unstemmed words isn't easily possible
smls dev.perltuts.com/try runs 2015.11
timotimo there's the thing that perl6.party uses, but i forgot its name
moritz timotimo: I'd have to maintain a second search index
timotimo: yes, github.com/moritz/ilbot/issues/47 has the discussion 08:13
timotimo i didn't see it 08:14
MasterDuke: seems like a simple fix ought to be possible to make that pull request mergable
smls: glot.io/ - that one supports perl6 and has a new-ish version available 08:15
smls thanks
timotimo a 2016.04 moar rakudo
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Woodi open source vs lawyers approach in Linux from yesterday: lists.linuxfoundation.org/pipermai...03580.html 08:42
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Woodi looks open source is a not bit like traditional academia :) 08:43
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Woodi btw. SSE4.2 have "Four string/text processing instructions providin 08:49
...g a rich set of primitives"
...for eg. XML parsing in few CPU instructions ? :) 08:50
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timotimo MasterDuke: the coverity scans are only up to date because i just submitted a new scan :) 11:13
MasterDuke oh, ha 11:14
nice it was that easy 11:15
timotimo well, yeah. just had to ping [ptc] so he could add me to the project 11:17
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MasterDuke also, moritz++ cherry-picked the second commit in my ilbot PR. i'm still trying to find a better modification to the regex than my first commit that doesn't blow it up to an absurd size 11:18
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timotimo [ptc]: did you realize that "ptc" could also be short for "pretty cool"? 11:21
[ptc] timotimo: hehe :-) 11:22
yoleaux 06:17Z <timotimo> [ptc]: were you the one who got coverity for moarvm?
timotimo %) 11:23
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MasterDuke timotimo: since evidence suggests you're awake now, this is me reminding you to re-run your coverage report 11:25
timotimo oh
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domm what would I use to get something like Term::ReadKey ReadMode 2 in Perl 6 (i.e. a prompt without echo, eg for passwords)? 11:45
oh, and greetings from the train from Budapest to Vienna
mst domm: this is probably not the right answer, but due to ReadKeybeing XS, when writing fatpackable code I just do system('stty -echo'); ... system('stty echo'); 11:47
so you can always stick that in with a '# blame mst' and replace it with the right answer when somebody provides it
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gfldex domm: see gist.github.com/gfldex/7d716436aa8...abd7106c3d 11:48
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gfldex mst: right answer ^^^ :) 11:48
mst \o/ 11:49
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gfldex domm: please note that '/dev/tty' may prove difficult on windows 11:49
timotimo gfldex: if you had a supply block there, you could have a phaser for when the supply gets closed, so that the "max" logic could wander into the whenever! :) 11:50
but the ENTER and LEAVE is nice, too
domm thx
mst wow but Term::termios has a bizarre calling convention
domm it's a private tool I use, so /dev/tty is no problem
gfldex mst: it surely does 11:51
it's a fairly thin layer on the c-stuff that shows its age
mst the C calling convention for getattr() and setattr() is not bizarre, just old-school C 11:52
I'm perfectly familiar with this
timotimo time to build Term::termios:api<2> :)
mst it's the way it's been translated that's making my eyes cross ;)
gfldex CLI::Promt::Password may actually what most ppl look for 11:53
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domm I can try to implement CLI::Prompt::Password, but probably only next week (at Alpine Perl, with the help of Liz and nine) 11:55
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mst I'm guessing by the way gfldex said that that there is one somewhere? 11:57
gfldex there is github.com/titsuki/p6-Terminal-Readsecret what comes with a dep. to readsecret. No idea if that is portable. 11:59
mst ah, ok 12:01
domm good enough for me for now
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domm another question: how can I convert a Buf (as returned by Digest::MD5.md5_buf) into an Int? 12:05
mst can you not .Hex.Int it or something? 12:07
domm reason: I calc a md5-sum (actually I'd prefer SHA1, but could not find it), convert the first few bytes to int, and seed the random number generator with that
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domm mst: I tried, but was offline and did not get any results 12:07
But not sure if i tried .Hex.Int
mst I may bbe imagining it 12:08
domm Method 'Hex' not found for invocant of class 'Buf'
mst but it seems like you're trying to go buf -> hex -> int
MasterDuke the docs suggest 'use experimental :pack;' and then the unpack method 12:09
domm .Int returns the number of bytes in the buffer
MasterDuke: ok, thanks, I'll try that
(as I said I was offline and could only grep the source/docs for stuff, and google > grep)
nice, this works 12:12
and it seems that my offline docs are rather old..
MasterDuke the docs have seen a lot of action the last couple months: github.com/perl6/doc/graphs/commit-activity 12:19
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domm use experimental :pack; use Digest::MD5; my $d = Digest::MD5.new; $d.md5_buf(<"The","European","Perl","Conference">).unpack("CCCCCC").reduce: * ~ * 12:33
not exactly what I'm doing, but it works - thanks! 12:34
ah, and one last questions: how can do the folling Perl 5 code in 6 12:35
sub foo { say "foo" }; my $name = 'foo'; $foo->(); &$foo;
ah, soory 12:36
sub foo { say "foo" }; my $name = 'foo'; $name->(); &$name;
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domm perl -E 'sub foo { say shift }; my $name = "foo"; $name->("A"); &$name("B")' 12:37
dalek href="https://modules.perl6.org:">modules.perl6.org: 1d2db63 | (Tom Browder)++ | templates/root/index.html.ep:
correct grammar
12:40
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dalek rl6-most-wanted: 8501b88 | (Tom Browder)++ | most-wanted/modules.md:
add new module WIP
12:48
rl6-most-wanted: 559712a | (Tom Browder)++ | most-wanted/modules.md:
fix typo
12:50
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MasterDuke m: class A { method foo { say "foo" } }; my $name = "foo"; A."$name"() 12:57
camelia rakudo-moar 6a8278: OUTPUT«foo␤»
MasterDuke domm: ^^^ for methods at least
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tbrowder ref modules: I've been trying to use Digest::xxHash, which uses naticecast, and see that somehow p6 translates uint64 into a bigint. how can we preserve the unsignedness in p6? 13:02
gfldex m: sub foo(){ 'oi!' }; my $foo = '&foo'; say ::($foo).(); 13:04
camelia rakudo-moar 6a8278: OUTPUT«oi!␤»
gfldex domm: ^^^
m: sub foo(){ 'oi!' }; my $foo = '&foo'; say ::($foo)();
camelia rakudo-moar 6a8278: OUTPUT«oi!␤»
MasterDuke m: sub foo(){ 'oi!' }; my $foo = 'foo'; say ::("&$foo")(); 13:06
camelia rakudo-moar 6a8278: OUTPUT«oi!␤»
MasterDuke tbrowder: there are a couple tickets (e.g., RT #124294, RT #127210, RT #127144) about uint types, it looks like they aren't quite working as people expect 13:12
synopsebot6 Link: rt.perl.org/rt3//Public/Bug/Displa...?id=124294
Link: rt.perl.org/rt3//Public/Bug/Displa...?id=127210
Link: rt.perl.org/rt3//Public/Bug/Displa...?id=127144
masak hi, #perl6 13:13
domm gfldex: thanks, again 13:22
pierre_ m: say "Bonjour!" 13:30
camelia rakudo-moar 6a8278: OUTPUT«Bonjour!␤»
pierre_ i have a small misunderstanding with defined 13:31
and Nil, or any
m: say Nil.defined
camelia rakudo-moar 6a8278: OUTPUT«False␤»
pierre_ Nil is not defined, which is expected
however, if i use Nil as a key in a hash, and then
let me show
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pierre_ m: my %h = Nil => 'should not be defined'; for %h.kv -> $k, $v { say $k;say $k.defined; } 13:32
camelia rakudo-moar 6a8278: OUTPUT«Nil␤True␤»
pierre_ is that normal ?
gfldex pierre_: Nil is not _the_ undefined value. Using Nil by hand will almost always result in bugs.
see: docs.perl6.org/type/Nil and docs.perl6.org/language/typesystem...efinedness 13:33
pierre_ yes,, i do not plan to use Nil
it's for a test case
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jnthn I think the confusion here though is that some-identifier => blah will auto-quote the left hand side as a string 13:33
m: say (Nil => 'what').perl
camelia rakudo-moar 6a8278: OUTPUT«:Nil("what")␤»
pierre_ i have a function, that i want to test against several values
gfldex my %h = Nil => 'should not be defined'; dd %h; 13:34
jnthn m: say (Nil => 'what').key.WHAT
camelia rakudo-moar 6a8278: OUTPUT«(Str)␤»
gfldex m: my %h = Nil => 'should not be defined'; dd %h;
camelia rakudo-moar 6a8278: OUTPUT«Hash %h = {:Nil("should not be defined")}␤»
pierre_ oh, :)
make sense
gfldex m: my %h{Any} = Nil => 'should not be defined'; dd %h;
camelia rakudo-moar 6a8278: OUTPUT«Hash[Any,Any] %h = (my Any %{Any} = :Nil("should not be defined"))␤»
pierre_ so if i want to store
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gfldex m: my %h{Any}; %h{Nil}= 'should not be defined'; dd %h; 13:35
camelia rakudo-moar 6a8278: OUTPUT«Hash[Any,Any] %h = (my Any %{Any} = (Nil) => "should not be defined")␤»
gfldex m: my %h{Any}; %h{Nil}= 'should not be defined'; %h.keys.say
camelia rakudo-moar 6a8278: OUTPUT«(Nil)␤»
gfldex m: my %h{Any}; %h{Nil}= 'should not be defined'; %h.keys.put
camelia rakudo-moar 6a8278: OUTPUT«Use of Nil in string context in block <unit> at <tmp> line 1␤␤»
pierre_ right
pair is auto quoting
just for the context, here is what i wanted to do 13:36
m: sub f( Any $obj) { return 'undef' unless $obj.defined; return 'true' if $obj == True; return 'false';} ; my %h = True => 'true', False => 'false', Nil => 'undef'; 13:38
camelia ( no output )
pierre_ and use %h to run my tests, by adding entries there 13:39
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TheGrimFandango hi 13:41
pierre_ i will then use an array and take element 2 by 2
m: my @a = Nil, 'should be undef'; for @a -> $k, $v { say $k.defined } 13:42
camelia rakudo-moar 6a8278: OUTPUT«False␤»
pierre_ Hi
gfldex if you want to hand Nil around like that you will have to use binding
pierre_ really, it's just in one test case 13:43
ok, i think the correct solution
i'll wirte a separate test for Nil :)
gfldex m: my Int $i is default(1); say $i; $i = Nil; say $i.defined;
camelia rakudo-moar 6a8278: OUTPUT«1␤True␤»
pierre_ and not use a hash
actually, in my test, i'm using Any, not Nil 13:44
but should be the same, no?
gfldex not at all
pierre_ just to check defineness
not to use it
gfldex you can use Mu if you need to differentiate between Any and "some undefined value" 13:45
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pierre_ m: my $undef; my %h = $undef => 'not defined'; for %h.kv -> $k, $v { say $k.defined } 13:45
camelia rakudo-moar 6a8278: OUTPUT«Use of uninitialized value of type Any in string context.␤Methods .^name, .perl, .gist, or .say can be used to stringify it to something meaningful. in block <unit> at <tmp> line 1␤True␤»
MasterDuke timotimo: btw, wasn't there some functionality missing in parse_coverage_report.p6 that i said i'd add? 13:46
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tbrowder .tell MasterDuke thanks! 13:55
yoleaux tbrowder: I'll pass your message to MasterDuke.
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tbrowder jnthn: any plans to work on uint64 issues in near future? 14:12
m: my $undef; say $undef.defined 14:24
camelia rakudo-moar 6a8278: OUTPUT«False␤»
tbrowder m: my $u = 1; say $u; $ 14:25
camelia rakudo-moar 6a8278: OUTPUT«WARNINGS for <tmp>:␤Useless use of unnamed $ variable in sink context (line 1)␤1␤»
tbrowder m: my $u = 1; say $u; $u = Nil; say $u 14:26
camelia rakudo-moar 6a8278: OUTPUT«1␤(Any)␤»
tbrowder m: my $u = 1; $u = Mu; say $u 14:28
camelia rakudo-moar 6a8278: OUTPUT«(Mu)␤»
tbrowder m: my $u = Mu; say $u.defined 14:29
camelia rakudo-moar 6a8278: OUTPUT«False␤»
tbrowder m: my $u = Any; say $u.defined 14:30
camelia rakudo-moar 6a8278: OUTPUT«False␤»
mr-fooba_ is there any guide to get started with perl6 on js ?
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tbrowder m: my $u = Nil; say $u.defined 14:33
camelia rakudo-moar 6a8278: OUTPUT«False␤»
tbrowder so it looks to me that one can set a previously defined var to Mu, Any, or Nil to undefine it, no? 14:34
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moritz not really 14:35
m: my Int $x = 42; $x = Any
camelia rakudo-moar 6a8278: OUTPUT«Type check failed in assignment to $x; expected Int but got Any (Any)␤ in block <unit> at <tmp> line 1␤␤»
moritz m: my Int $x = 42; $x = Nil; say $x.perl
camelia rakudo-moar 6a8278: OUTPUT«Int␤»
tbrowder m: my $u = 1; $u = Nil 14:37
camelia ( no output )
ugexe ...
m: say Nil ~~ Any 14:38
camelia rakudo-moar 6a8278: OUTPUT«True␤»
tbrowder m: my $u = 6; say $u.defined; $u = Nil; say $u.defined
camelia rakudo-moar 6a8278: OUTPUT«True␤False␤»
tbrowder it looks like, if one doesn't explicitly type a defined var, then assigning Nil to it undefines it 14:39
ugexe or stores the value which may or may not be undefined 14:40
tbrowder ?? 14:41
geekosaur I think they dropped a word. Nil stores the default value
m: my Int $v is default(6); $v = 10; say $v; $v = Nil; $v.say 14:42
camelia rakudo-moar 6a8278: OUTPUT«10␤6␤»
tbrowder i'm just interested in ensuring a previously defined var can be forced to become undefined
is there a best-practice way to do that? 14:43
geekosaur m: my Int $v is default(6); $v = 10; say $v; $v = Int; say $v.defined 14:44
camelia rakudo-moar 6a8278: OUTPUT«10␤False␤»
tbrowder m: my $u = 4; if $u say 'def'; $u = Nil; if !$u say 'undef or false' 14:46
camelia rakudo-moar 6a8278: OUTPUT«5===SORRY!5=== Error while compiling <tmp>␤Missing block␤at <tmp>:1␤------> 3my $u = 4; if $u7⏏5 say 'def'; $u = Nil; if !$u say 'undef ␤ expecting any of:␤ block or pointy block␤ infix␤ infix stopper␤»
ugexe my $x is default(1); say $x; $x = Nil:U; say $x.defined; say $x.WHAT
m: my $x is default(1); say $x; $x = Nil:U; say $x.defined; say $x.WHAT
camelia rakudo-moar 6a8278: OUTPUT«1␤False␤Nil␤»
ugexe gets around Nil setting default value of 1 which would be defined 14:47
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tbrowder i don't see a practical difference for my typical use case 14:49
let me try the last case again co
ugexe if you want to ignore `is default` and any 3rd party who may set that trait, then no there is no difference 14:51
tbrowder m: my $x = 't'; say $x; say 'true' if defined $x
camelia rakudo-moar 6a8278: OUTPUT«t␤true␤»
tbrowder okay, thanks, i guess i just don't understand meta programming!! 14:52
geekosaur um
are you confusing/conflating defined with existence?
(because I see no metaprogramming here) 14:53
tbrowder too deep for my simple needs
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pierre_ m: Blob.new( 65535.base(16).comb(2).map( {:16($_)} ) ).say 15:10
camelia rakudo-moar 6a8278: OUTPUT«Blob:0x<ff ff>␤»
pierre_ any shortcut to go from 65535 to Blob 0x<ff ff>
my solution looks a bit too much :) 15:11
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pierre_ Blob.new( 65535 ) 15:25
m: Blob.new( 65535 )
camelia ( no output )
pierre_ m: Blob.new( 65535 ).say
camelia rakudo-moar 6a8278: OUTPUT«Blob:0x<ff>␤»
ugexe m: say Blob.new(65535 xx 2) 15:30
camelia rakudo-moar 6a8278: OUTPUT«Blob:0x<ff ff>␤»
pierre_ and my solution is broken on top of that
m: 65539.base(16).comb(2)
camelia ( no output )
pierre_ m: 65539.base(16).comb(2).say
camelia rakudo-moar 6a8278: OUTPUT«(10 00 3)␤»
pierre_ hum, interesting, with xx
geekosaur that doesn't actually work 15:31
it's truncating the top byte of 65535 to get 255 and putting that in the Buf
pierre_ oh right :)
it's doing Blob.new( 65535, 65535) 15:32
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pierre_ m: pack 'n', 65535 15:41
camelia rakudo-moar 6a8278: OUTPUT«Use of the 'pack' function is experimental; please 'use experimental :pack'␤ in block <unit> at <tmp> line 1␤␤»
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pierre_ m: 'use experimental :pack; pack('n', 65535).say 15:42
camelia rakudo-moar 6a8278: OUTPUT«5===SORRY!5=== Error while compiling <tmp>␤Two terms in a row␤at <tmp>:1␤------> 3'use experimental :pack; pack('7⏏5n', 65535).say␤ expecting any of:␤ infix␤ infix stopper␤ statement end␤ statement m…»
pierre_ m: use experimental :pack; pack( 'n', 65535 ).say 15:44
camelia rakudo-moar 6a8278: OUTPUT«Buf:0x<ff ff>␤»
pierre_ experimental, but that would work
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zacts hi perl6 nerds 15:54
grondilu pack is one of the first function I've delved deeply into while learning perl. I'm surprised it's experimental in Perl 6.
zacts: hi
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AlexDaniel grondilu: perhaps you can help? :) 15:57
trying to find previous discussions on this topic. Here is the pull request that made it experimental: github.com/rakudo/rakudo/pull/649 15:58
grondilu well, as written: "There is currently no language specification for pack and unpack." 16:00
I vaguely recall discussing it long time ago with maybe jnthn or moritz. Seemed that they were not very happy with just copying how Perl 5 does it. Maybe they wanted a slang for the packing specification language or something. 16:01
AlexDaniel github.com/lizmat/PackUnpack 16:02
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moritz grondilu: the real problem is that with Perl 6, you typically want to deal not just with primitives, but with ojbects 16:26
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moritz grondilu: so a pack or unpack that doesn't work with user-defined classes is very short-sighed 16:26
also, Perl 6 distiniguishes between Str and Buf, which makes some things more complicated 16:27
grondilu well to pack a string you'd have to encode it first, no?
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grondilu (though encoding and packing are arguably the same thing, IDK) 16:43
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dalek c: fdb41ec | titsuki++ | doc/Type/Pair.pod6:
Fix Pair examples
16:55
c: 4357ca3 | titsuki++ | doc/Type/Pair.pod6:
Merge pull request #865 from titsuki/fix-pair

Fix Pair examples
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tbrowder is there any difference between a hash and a map? 18:00
the reason i ask is that the docs on hash are a bit confusing for noobs, and there is no topic on hashes in Language that i see (kind of a part of Sets, Bags, etc.) 18:02
geekosaur the types document notes that Map is immutable
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tbrowder also, the bits on hash don't consistently use the % sigil which is very confusing the way it's written 18:03
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gfldex tbrowder: the sigils table in /language/variables should link to Hash (and the other types) but table rendering isn't there yet 18:07
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eythian is there an equivalent of Proc::Daemon for p6, or a nice way to have a program daemonise itself? 18:26
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El_Che_ run it with & and use one of the concurrency constructs? 18:45
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timotimo El_Che: running with & is very much not daemonizing 18:48
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eythian yeah, the thing I'm writing I'd like to be a real daemon. 18:51
timotimo use systemd :) 18:53
or any of those tools that do that stuff for you, really
mst eythian: Daemon::Control
eythian: is a perl5 module that will happily daemonize a perl6 program 18:54
or you could use runit or s6 or similar
eythian thanks
mst what are you trying to daemonize *for* is the question
eythian (I'm porting an old perl5 script to p6 as a learning exercise.) 18:55
mst timotimo: ok, but for those of us running actual unix ... :)
Proc::Daemon is shit and broken anyway
so you don't want to port that part
timotimo there's at least a hundred tools that will daemonize your stuff, just like systemd would
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mst systemd doesn't actually daemonize things at all 18:55
timotimo well, systemd will control & own your tty instead of throwing it out
mst it runs services without daemonization
timotimo but at that point ... what's the difference?
eythian well, it's a process that runs and every minute checks for an update to some data, and if that's changed, does some stuff in response.
mst eythian: ok, so I would just run that under runit or s6 18:56
(which are newer daemontoolsish things)
whereas systemd is that, plus a broken dependency resolution system, plus a broken logging system, plus hentacles :D
timotimo when you get your stdout and stderr directly pushed into the journal, that's a nice feature that you can use. with a daemon, you don't really get stdout or stderr at all
mst timotimo: if you believe that, you don't know how to write a unix service.
timotimo broken dependency resolution system? were you thinking of upstart maybe? 18:57
eythian yeah, so I'm going to be running this on a debian platform and not willing to replace the init system :)
mst timotimo: no. systemd allows loops and picks a dependency at random to ignore, thereby resulting in systems that boot or don't boot at random
timotimo mst: well, you can surely output to stdout and stderr, but it just goes nowhere, because you specifically made sure to make them not connected to anything ... which is half of the point of daemonizing, isn't it?
wow, that seems clever
though perhaps with a loop you're really declaring you want systemd to do that thing for you? 18:58
El_Che timotimo: well, just use an initd script or systemd? I don't think that logic should be in the script itself
timotimo: it's just infrastructure
mst timotimo: no, daemonizing is about getting your own process group and detaching from the terminal - commonly you'd re-open STDOUT/STDERR as a pipe to syslog or whatever
if you want stdout/stderr
timotimo to me, that's far enough from "regular stdout/stderr" to not count :)
mst timotimo: er. but systemd does exactly the same thing. 18:59
it's just it re-opens them for you
timotimo that's like saying "bash allows you to pipe the output of any program to any target. you just have to compile the path you want the data to go into into your program every time before you run it"
mst ...
timotimo "yeah, you get stdout and stderr. you just have to manually open them to some specific path or pipe!"
mst yeah, and systemd opens them to some specific binary thing 19:00
that has a habit of losing messages during early boot
good luck if you have a kernel problem
I can make systemd do what I need it to
timotimo i thought journald was made specifically so you get all the early boot messages, too? instead of losing them?
mst no. journald specifically loses them.
timotimo haha, that's not good :)
mst because it doesn't always manage to come up in time, so then it has a fixed size buffer 19:01
and if you exceed that, sucks to be you
timotimo i never knew of those flaws
mst it's amateur hour all the way down
they also added a default setting where if you ssh into your postgres user, on logout it kills the database
because it does a bunch of brute force cleanup of running IPC stuff ... because gnome doesn't clean up reliably 19:02
masak moritz: is github.com/moritz/json under any kind of license?
timotimo yeah, i'm not a fan of that default. luckily distros will gladly kill that default with fire
masak moritz: (I just assumed that it had a permissive LICENSE file, but now that I look at the repo, I see that it in fact has none)
timotimo i haven't heard about that brute force cleanup stuff, though
mst the brute force cleanup *is* what kills postgres 19:03
also, there are shipped versions of ubuntu that don't override it 19:04
and of course ssh is the standard way to ship WAL files for master/slave
so you try and replicate your database for reliability and it kills your database
because of a bug in gnome
*slowclap*
timotimo i have to get going :(
this discussion is pretty enlightening, though
mst from my POV, systemd is an excellent desktop init system 19:05
since it optimises for speed of boot over reliability
which is totally correct for that
but really hateful when you have a real server that takes a couple minutes to memcheck etc. before booting 19:06
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tbrowder gfldex: thanks 19:06
mst eythian: btw, I prefer running perl5 stuff under s6 and etc. too
eythian: I only use Daemon::COntrol when I need an /etc/init.d script 19:07
eythian OK. I'll take that under advisement :) 19:08
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mst Proc::Daemon has the POSIX::Close bug that's common in daemonizers 19:09
where it force closes fds at the C level 19:10
this can seriously confuse perl
(like, "your app ends up logging into its pid file" confuse)
timotimo pff, just write your daemon as "crash-only software"
perl gets confused? crash the process and have it re-started!
eythian is it the case that you can 'use Foo::Bar' with most perl5 modules and they just work?
timotimo no, you have to write :from<Perl5> in order for that to work 19:11
mst err, I suggested Daemon::Control because it can invoke *processes*
so you'd tell it to run 'myperl6script'
timotimo BBL
but yeah, perl5 modules usually Just Work in perl6 when using :from<Perl5>
eythian cool, ta 19:12
mst eythian: generally I'm using perl6 for clever things 19:13
and then when I run into a "perl6 has had lots of CS people and no sysadmins" type problem, I wrap some perl5 around the perl6 code, shrug, and go back to writing perl6 19:14
dalek rl6-most-wanted: 149a0f2 | (Tom Browder)++ | most-wanted/modules.md:
change module name for clarity of purpose
eythian in this case, it's a relatively simple program, but a good excuse to learn P6 anyway. So far, the differences from p5 are breaking my head :)
mst and in this case, Proc::Daemon is a bug in the perl5 script, so there's no reason to port the bug anyway 19:16
dalek rl6-most-wanted: ebdddb7 | (Tom Browder)++ | most-wanted/modules.md:
get the spelling correct!
masak moritz: I think since you don't have a LICENSE file in that repo, and since I copy-pasted code from it into my project, technically I'm infringing on your copyright 19:17
eythian mst: sure, it's a chance to modernise the program a bit too
mst masak: it's derived from the rakudo code isn't it? so surely it can be presumed to be under the rakudo license
masak mst: no, I think the flow was the other way around
mst I mean, there should still be a LICENSE file or whatever
ah
but, submitting it to rakudo required saying "at least this version is under the rakufdo license" 19:18
masak troo
mst so you're possibly technically infringing on his copyright for the commits that haven't been pushed to rakudo yet
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El_Che mst: mylinux dystopia within 5 years: Linux is just systemd + powershell :) 19:49
mst El_Che: that or poettering invents a cshell variant
El_Che well, at least we'll got rid of d'icaza additions (cough*registry*cough). Combat evil by greater evil! 19:50
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mst hm? 20:02
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El_Che mst: I meant gconf, but it was probably not d'icaza but Havoc Pennington 20:11
"if you want to change an interesting setting, you need to edit a registry key" sigh 20:12
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mst I don't run gnome 20:12
timotimo El_Che: better than implementing "watch this config file for changes and re-parse" from scratch for every single application :) 20:13
El_Che timotimo: you just described my life's philosophy :)
smls m: say 6.0221415⏨23; # What's this, Perl 6 doesn't support the Unicode decimal expoinent symbol? :P 20:15
camelia rakudo-moar 6a8278: OUTPUT«5===SORRY!5=== Error while compiling <tmp>␤Bogus postfix␤at <tmp>:1␤------> 3say 6.02214157⏏5⏨23; # What's this, Perl 6 doesn't supp␤ expecting any of:␤ infix␤ infix stopper␤ postfix␤ statement en…»
arnsholt timotimo: Or "mountains and mountains of envvars, which may or may not be set (to the right thing!) when you need them to"
mst timotimo: how do you get auto-watching for gconf in a gnome app then? 20:16
mst would suspect that it's a libsomething 20:17
in which case surely you could have a libsomething that provides the watching+parsing
timotimo arnsholt: you definitely can't change an env var while a program is running :D 20:19
mst: i thought that's just built into the thing?
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mst timotimo: what 'the thing' are you referring to? 20:20
timotimo i might be imagining things again
the gconf thing
mst harghj
let me rephrase 20:21
what 'the gconf thing'
gfldex m: sub infix:<⏨>($n,$e){10 ** $e * $n}; say 6.0221415⏨23;
camelia rakudo-moar 6a8278: OUTPUT«602214150000000000000000␤»
gfldex smls: there ^^^ you go
mst how does gconf avoid reimplementing things on a per-application basis?
geekosaur it's wired into gtk and gnome, for most programmers you just set a gconf settings domain (~ "application name") and it handles the updates behind the scenes 20:22
that said, being able to get notified that the specific value changed and then retrieve just that value, rather than parse a file and figure out which thing(s) changed, is also worth something
timotimo i'll be pretty much computer-less for the rest of the night 20:24
see ya!
eythian how do I tell if something is a Bool or a Str? 20:26
oh, using ~~ 20:27
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geekosaur as for usage, if you do want to use it yourself, you are basically telling gconf "watch this setting or settings hierarchy, call this callback with the new value(s) if one of them changes" 20:28
oh, also this is backed not (only) by files but by IPC. dbus may not be the best implementation of the idea, but the idea itself is good. (much the same applies to systemd, for that matter.) 20:33
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geekosaur (of course both of those are just reinventing different aspects of a microkernel architecture, and arguably the reason they get away with it is hardware's fast enough now) 20:34
mst geekosaur: that all seems reasonable, except for the part where it isn't backed by sensible config files in ~/.application that I can edit with vi 20:35
geekosaur I don't know what gconf/dconf uses these days. gconf1 and iirc at least early 2 were backed by text files you could edit as long as gconfd wasn't running at the time (since it can update them on you) 20:36
that said, I've gradually fallen out of love with text files. yes, they're simple. simple like something that works in simple situations and doesn't scale
I want *recovery options*. I do not necessarily want or need text files über alles; that's just one option and not necessarily the right one for all situations 20:37
mst see, I'd like to be able to edit them, *and* have it write them
harmil Finally adding Math::Sequences to ecosystem. Still very few of the core OEIS sequences defined, but all stubbed and tests in place.
geekosaur so you're teaching your editor file locking?
mst and for configuration text files should be *an* option
... no I'm not 20:38
I might lose an update occasionally
that happens if I update something another way while I've got a file open
I already had that problem
geekosaur I *really* dislike data loss situations
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geekosaur frankly, if it's importaant enough that you want recovery options, it's important enough you don't want overwrites to lose data 20:39
mst ...
you're arguing against something I never said
geekosaur or, you want gtext files because text files
mst I don't know where this even came from
also
if I have stuff in git
geekosaur in which case I'm not arguing, Im just leaving you to yourself
mst I don't generally lose data
I am saying "having a text file format, where I can edit it, and the program can also write to it, can be useful" 20:40
there are combinations of ways for that to play out that lose an update
but trying to avoid all possible lost update situations doesn't scale
so shrug
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dalek osystem: 6b3a84a | (Aaron Sherman)++ | META.list:
Add Math::Sequences to ecosystem

See github.com/ajs/perl6-Math-Sequences
20:41
osystem: 9dcd3e3 | Altai-man++ | META.list:
Merge pull request #244 from ajs/master

Add Math::Sequences to ecosystem
harmil woo!
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harmil Math::Sequences::Integer is FULL of stub sequences from the OEIS. Any lurkers looking for an easy task: feel free to unstub some of those, run the tests for it in t/OEIS.t and submit a pull request! 20:43
Even if I get to it before you, I'm always on the lookout for better implementations than my own. Many of mine are very naive and slow. 20:45
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tbrowder ref sprintf doc: please review PR "github.com/perl6/doc/pull/866" 20:59
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tbrowder going once... 21:37
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masak hurrying up a channel for feedback is seldom all that effective 22:00
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ugexe harmil: why do you have a depends on CompUnit::Util when you don't use it? 22:04
harmil ugexe: ah, that's a vestige. I'll get rid of it. I used to have a top-level module that re-exported my sub-modules
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harmil ugexe: done. thanks 22:06
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ugexe all these regular dependencies on Test::META for what is an author test is starting to get out of hand re: cargo culting 22:11
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ugexe its like making everyone who installs your module test it against perl critic and test::pod or whatever from perl 22:13
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masak 'night, #perl6 22:14
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harmil ugexe: it does seem dubious... 22:17
I'm off, all. Have a great night 22:18
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dalek c: e7c91f5 | (Tom Browder)++ | doc/Type/Str.pod6:
add note about current state of the implementation
22:47
c: 5e16303 | Altai-man++ | doc/Type/Str.pod6:
Merge pull request #866 from tbrowder/sprintf-note

add note about current state of the implementation
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dalek c: 2fcd105 | Altai-man++ | doc/Type/Str.pod6:
Fix typo
22:49
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ugexe we need an author-depends type field 23:01
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