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»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. |
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| vcv | Was able to reproduce my issue in glot.io as soon as I separated my code out into separate files instead of one, which is how I have it locally. glot.io/snippets/eydmv3hf0r | 00:02 | |
| If i remove the custom trait on my method it works | |||
| AlexDaniel | is glot.io using rakudobrew? | 00:03 | |
| because they might want to… switch to the master branch | 00:04 | ||
| maybe they're not using blead, but 2017.10 is a bit suspicious | |||
| “FROM rakudo-star:latest” | 00:05 | ||
| vcv | I don't think it's the version. I think I can produce a smaller test case as well... | ||
| AlexDaniel | ah, it's star release also, ok then | 00:06 | |
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| jimav | Is there a ticket system for Rakudo bugs? The only thing I found was a mailing list [email@hidden.address] | 00:13 | |
| And, where would be a good place to ask questions about language design decisions (I know...) | 00:14 | ||
| Specifically, why P6 permits sigilless "variables" to be created with = as well as := (rather than := only) | |||
| AlexDaniel | jimav: github.com/rakudo/rakudo/issues/ and fail.rakudo.party/ | ||
| *language* design decisions should be discussed elsewhere, but this does not happen that often nowadays… | 00:15 | ||
| jimav | I assumed that was the case... | ||
| AlexDaniel | there's github.com/perl6/6.d-prep/ for v6.d release | 00:16 | |
| jimav | Thanks, that is helpful. | 00:17 | |
| vcv | I got a smaller test case reproducable on my local perl6 (Rakudo Star 2018.01) and glot.io: glot.io/snippets/eydnap6xrl | ||
| AlexDaniel | jimav: if I were you I'd probably submit a ticket with RFC label to the main rakudo tracker ( github.com/rakudo/rakudo/issues/ ) | ||
| vcv | If I combine the code into a single file the issue goes away | ||
| AlexDaniel | once someone can point out a better place it can be moved | ||
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| AlexDaniel | jimav: or, if you're feeling serious about it, 6.d-prep repo is indeed the right place (similarly to github.com/perl6/6.d-prep/issues/4 ) | 00:19 | |
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| Zoffix | jimav, well, (1) less typing; (2) don't have to remember which one works and which one would throw on you; (3) no questions about why it's `.=` and not `.:=` :) | 00:27 | |
| They're equivalent otherwise. | |||
| As for the "variables", they can variate: | 00:28 | ||
| m: my \foo = $ = "meows"; foo = 42; say foo | |||
| camelia | 42 | ||
| Zoffix | m: my \foo = $ = "meows"; foo = 42; foo = 100; say foo | ||
| camelia | 100 | ||
| Zoffix | m: my \foo = $ = "meows"; foo := 42; foo = 100; say foo | 00:29 | |
| camelia | 5===SORRY!5=== Error while compiling <tmp> Cannot use bind operator with this left-hand side at <tmp>:1 ------> 3my \foo = $ = "meows"; foo := 427⏏5; foo = 100; say foo |
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| Zoffix | bah :) | ||
| vcv | Opened my first bug for rakudo (github.com/rakudo/rakudo/issues/1536) woohoo | 00:30 | |
| Zoffix | Sweet :) | 00:31 | |
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| Zoffix | Related: RT#121991 | 00:32 | |
| Oops | |||
| synopsebot | RT#121991 [open]: rt.perl.org/Ticket/Display.html?id=121991 [@LARRY] Unless 'use soft' is in play, .wrap should die in Rakudo | ||
| Zoffix | Damn you copy-pasteable \n's! | ||
| Related: RT#121991 RT#129096 RT#128476 RT#127860 RT#125634 | 00:33 | ||
| synopsebot | RT#129096 [open]: rt.perl.org/Ticket/Display.html?id=129096 [BUG] sub wrapped with mod_trait:<is> when exported yield cryptic error message, works fine in same unit | ||
| RT#128476 [new]: rt.perl.org/Ticket/Display.html?id=128476 [SEGV] .wrap causes segfault when wrapping core sub and using that sub in a module that uses the module that wraps | |||
| RT#127860 [open]: rt.perl.org/Ticket/Display.html?id=127860 [BUG][PRECOMP] Wrapped method fails when precompiled | |||
| RT#125634 [open]: rt.perl.org/Ticket/Display.html?id=125634 [BUG] Using a compiled (mbc) wrapping trait: Cannot invoke this object (REPR: Null, cs = 0) | |||
| vcv | ahh, 129096 looks like the same bug for sure | 00:35 | |
| and yep, adding no precompilation; to the top of the file with my custom trait "fixes" it. That's a good enough workaround for now, thanks Zoffix++ | 00:37 | ||
| Zoffix | vcv: your ticket is still good to have, as GitHub is a better Issue tracker. | ||
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| vcv | Are there other ways to annotate a sub/method beside for #| ? I'm using the custom trait but the trait doesn't actually *do* anything in my way, plus checking that the method has the specific trait seems difficult | 00:42 | |
| in my case* | |||
| sharksoft | Is there a more efficient way to compute this? I'm calculating the entropy of N probability distributions across C classes stored in an (N, C) array and returning a (N, ) array: (@probs[].map: *.map: { $_ * $_.log }).map: { -1 * $_.sum } | 00:43 | |
| Zoffix | this reminds me | 00:44 | |
| huggable: log | |||
| huggable | Zoffix, Comes out 2.41x faster than core .log10 and can handle Ints larger than 1.8e308: gist.github.com/zoffixznet/2539e8b...43e173fe8f | ||
| Zoffix | Ah, it was .log10; nevermind | ||
| sharksoft | maybe on a related note, anybody know about PDL coming to Perl 6? | 00:45 | |
| Zoffix | sharksoft: nothing particularly jumps out to me in that code | ||
| (in a sense that there'd be some much faster way to do a thing) | |||
| sharksoft | well thanks, I appreciate it. can I write that any more cleanly or is that about as concise as that gets? | 00:46 | |
| Zoffix | You can omit the `[]` and the `$_` on the method calls | 00:47 | |
| m: .sum.say with ^10 | |||
| camelia | 45 | ||
| sharksoft | ah, right | ||
| thanks! | |||
| Zoffix | And I guess `.map: { -1 * $_.sum }` can be written as just `.map: -*.sum` | 00:48 | |
| (in the latter, the `*` is the Whatever and makes a WhateverCode closure | |||
| ) | |||
| sharksoft | do you have a link handy for explaning when the Whatever works and when you need $_? | 00:49 | |
| Zoffix | sharksoft: there's docs: docs.perl6.org/type/WhateverCode and also there's this blog post (I've not read it; dunno how good it is): perl6advent.wordpress.com/2017/12/11/ | 00:50 | |
| sharksoft | thanks! | ||
| Zoffix | sharksoft: $_ can be omited on method calls... I think that's the only place where it can be omitted. The Whatever star makes a closure pretty much everywhere, as long as it's not used as a thing on its own (basically say(*) is a call of &say with just Whatever instance, whereas say(*.so) makes a WhateverCode closure) | 00:51 | |
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| sharksoft | that's helpful | 00:53 | |
| i just need to put my functional hat back on | |||
| Zoffix | vcv: dunno. In core, there's a trait that mixes in a role that adds a method and then the thing that checks the annotation just checks if routine .can that method | ||
| m: multi trait_mod:<is> (Routine:D \r, :$meow!) { r.^mixin: role Meower { method meow {} } }; sub foo is meow {}; sub bar {}; say .can("meow") ?? "Tis a meow sub" !! "some other sub" for &foo, &bar | 00:54 | ||
| camelia | Tis a meow sub some other sub |
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| Zoffix | vcv: something like that | ||
| m: multi trait_mod:<is> (Routine:D \r, :$meow!) { r.^mixin: role Meower { } }; sub foo is meow {}; sub bar {}; say $_ ~~ Meower ?? "Tis a meow sub" !! "some other sub" for &foo, &bar | 00:55 | ||
| camelia | Tis a meow sub some other sub |
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| Zoffix | I guess that works too | ||
| (just mixin a role and typecheck on whether the sub is of that type) | |||
| vcv | Ahh good trick. thanks :) | 00:56 | |
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| Geth | doc: 0d3973ee64 | (JJ Merelo)++ | doc/Language/containers.pod6 Eliminates "also" Closes #1784 |
06:18 | |
| synopsebot | Link: doc.perl6.org/language/containers | ||
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| Geth | doc: 7ec4382595 | (JJ Merelo)++ | doc/Language/containers.pod6 Fixes example It does compile now. Closes #1785. |
06:33 | |
| synopsebot | Link: doc.perl6.org/language/containers | ||
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| Xliff | \o | 12:04 | |
| Is there a way to define a rule {} within anothe rule{} ? | 12:05 | ||
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| moritz | well, you can have a code block, and inside my rule foo { ... } | 12:19 | |
| but, what's the use case? | |||
| Xliff | Succinctness. | ||
| Readability. | |||
| moritz | I doubt you'll gain that | 12:20 | |
| Xliff | rule _used_only_in_rule_a { ... }; rule a { ...Lotsa complex stuff using _used_only_in_rule_a ... } | 12:21 | |
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| Xliff | Rather than have that rule messing around, I'd like to put it all in rule a {}, so its easier to find. | 12:21 | |
| If you really need a use-case, I will write a gist. | 12:24 | ||
| Mixing grammars with code looks like really powerful tool. I've been looking here for ideas: | 12:25 | ||
| github.com/perl6/std/blob/master/STD.pm6 | |||
| But I don't know how relevant that is. | |||
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| cygx | m: my rule foo { :my rule bar { 42 }; <bar> }; say 42 ~~ /<foo>/ | 12:48 | |
| yoleaux | 28 Jan 2018 09:09Z <nine> cygx: github.com/rakudo/rakudo/commit/b6a7d7f64d should take care of it | ||
| camelia | ｢42｣ foo => ｢42｣ bar => ｢42｣ |
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| cygx | Xliff: ^^ | ||
| Xliff | cygx++ | 12:49 | |
| But if the rule is multilined, will the prefix-by-colon still work? | 12:50 | ||
| Let me gist | |||
| Or better yet, paste. | |||
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| Xliff | gist.github.com/Xliff/4bfbfb6b348b...2896c15416 | 12:55 | |
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| Xliff | Hmm... "perl6 -c" doesn't seem to think so... at least with a space in front of "my" | 12:56 | |
| Maybe code block in that case. | 12:57 | ||
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| cygx | Xliff: I left a comment on that gist | 13:22 | |
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| Xliff | Thanks, cygx++ | 15:46 | |
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| Geth | doc: 07ebe8ad3f | (JJ Merelo)++ | doc/Language/quoting.pod6 Fixes results of examples Closes #1786 |
17:37 | |
| synopsebot | Link: doc.perl6.org/language/quoting | ||
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| Geth | doc: fcd9e8e213 | (Zoffix Znet)++ | 2 files Clarify IO::[Cat]Handle.eof on zero-size files Impl: github.com/MoarVM/MoarVM/commit/8d94732aad github.com/perl6/nqp/commit/43d4336974 github.com/rakudo/rakudo/commit/af4dfe827c Spec: github.com/perl6/roast/commit/3ac8e0b8ae github.com/perl6/roast/commit/ed59a994cc Issues: github.com/rakudo/rakudo/issues/1533 R#1533 github.com/rakudo/rakudo/issues/1541 R#1541 |
18:29 | |
| synopsebot | R#1533 [closed]: github.com/rakudo/rakudo/issues/1533 [RFC][regression][⚠ blocker ⚠] /proc/…/status can no longer be read line by line | ||
| synopsebot | R#1541 [open]: github.com/rakudo/rakudo/issues/1541 [IO][JVM] [JVM] IO::Handle.eof always reports true for zero-size and /proc files | ||
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| Geth | doc: 43cab13cf0 | (JJ Merelo)++ | doc/Language/faq.pod6 Changes link to GitHub closes #1789 |
18:50 | |
| synopsebot | Link: doc.perl6.org/language/faq | ||
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| expectocode | hello! I'm trying to get into perl6 after spending a lot of time with python3, and i'm having trouble finding the equivalent to python's `enumerate`. Any tips? | 19:02 | |
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| expectocode | found it! what i was looking for was .kv | 19:07 | |
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| comborico1611 | expectocode: Sorry I missed ya. I'm a super newb myself. But in case you aren't familier, the best place to search for Perl6 operators and such is doc.perl6.org | 19:14 | |
| yoleaux | 10 Feb 2018 12:34Z <DrForr> comborico1611: I have a copy, but it's in storage, I believe. | ||
| comborico1611 | Sorry again, that's docs.perl6.org | 19:15 | |
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| moritz | doc is a redirect to docs, so no harm done :-) | 19:17 | |
| comborico1611 | Clever girl! (Jurassic Park reference) | 19:18 | |
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| Xliff | Jurassic Park reference? Where? | 19:47 | |
| Xliff disbelieves. | |||
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| census | does anybody happen to be very good with gmail here? | 19:48 | |
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| kurahaupo | census: that's an odd question, but shoot | 19:52 | |
| census | kurahaupo i can private message you so as to not clog the channel if you prefer | 19:53 | |
| kurahaupo | Ok | ||
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| expectocode | found it! what i was looking for was .kv | 19:54 | |
| kurahaupo | Xliff: "clever girl" was admiring the intelligence of the Velociraptor, while being hunted by her | ||
| gfldex | m: my @a = <apple banana grapes pear>; say $++, ': ',.Str for @a; | 19:56 | |
| camelia | 0: apple 1: banana 2: grapes 3: pear |
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| gfldex | expectocode: ^^^ we don't need enumerate, we got magic :-> | 19:57 | |
| expectocode | gfldex, ?? | ||
| gfldex | expectocode: also, .kv may produce surprising results if the Array got holes | 19:58 | |
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| gfldex | expectocode: if you need a one-shot counter us an anonymous state variable | 19:59 | |
| expectocode: see docs.perl6.org/language/variables#...$_Variable | 20:00 | ||
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| Xliff | kurahaupo: Yes. I got that. But does that mean you are calling moritz++ a Velociraptor?/ | 20:04 | |
| timotimo | expectocode: there's a document in the "language" section of docs.perl6.org that eases going from python to perl6 | ||
| Xliff | If so, that would explain a lot. :D | 20:05 | |
| That's assuming that for this conversation $Velociraptor ~~ WhateverCode (where ~~ === consumes) | 20:06 | ||
| timotimo | docs.perl6.org/language/py-nutshell | ||
| sadly, enumerate isn't listed | |||
| Xliff | census: If you still haven't gotten an answer, feel free to ping me. | 20:07 | |
| El_Che | what's enumeration? iterators? | ||
| expectocode | El_Che, it's when you loop through something and get a (index, value) pair instead of just value | ||
| gfldex, the thing i wanted to loop through was a string.comb but i appreciate the note | |||
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| gfldex | Str.comb should not produce holes :) | 20:08 | |
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| El_Che | yes, .kv is the perl 6 equivalent of each, range, |k,v| and friends :) | 20:08 | |
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| buggable | New CPAN upload: PDF-Class-0.0.8.tar.gz by WARRINGD cpan.metacpan.org/authors/id/W/WA/...0.8.tar.gz | 22:11 | |
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| kurahaupo | Xliff: sorry was afk on phone to a bereaved friend | 22:58 | |
| Xliff: I can't claim credit for calling moritz a velociraptor, but if you want to, go right ahead. 😁 | 22:59 | ||
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