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🦋 Welcome to Raku! raku.org/ | evalbot usage: 'p6: say 3;' or /msg camelia p6: ... | irclog: colabti.org/irclogger/irclogger_log/raku Set by ChanServ on 14 October 2019. |
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| guifa | Tirifto: one other potential way to do what you want to do (maybe) is to use ‘trusts’, that will allow a particular class access to the innards of another one, but not others. | 00:55 | |
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| Xliff | m: my $*A = 1; { $*A = 2; { $*A = 4; say $*A }; say $*A }; say $*A; | 03:47 | |
| camelia | 4 4 4 |
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| Xliff | m: my $*A = 1; { my $*A = 2; { my $*A = 4; say $*A }; say $*A }; say $*A; | 03:48 | |
| camelia | 4 2 1 |
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| toddandmargo | Does anyone know if Raku's NativeCall runs "LocalFree( )" after it finishes with buffers? Or do I need to do it myself? docs.microsoft.com/en-us/windows/w...-localfree | 05:11 | |
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| toddandmargo | I am doing it anyway. It is not throwing an error.This may be a bug in NativeCall, resulting in a memory leak | 06:03 | |
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| xinming | m: my ($, @data) = <a b c d>; $.perl.say; @data.perl.say; | 06:47 | |
| camelia | 5===SORRY!5=== Error while compiling <tmp> Variable $.perl used where no 'self' is available at <tmp>:1 ------> 3my ($, @data) = <a b c d>; $.perl7⏏5.say; @data.perl.say; expecting any of: term |
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| xinming | In this case, How can we print the value of $ ? | ||
| I mean, how do we use the $ var, IIRC, It can be used in one-liners | 06:48 | ||
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| Xliff | m: my ($, @data) = <a b c d>; @data.perl.say; | 06:48 | |
| camelia | ["b", "c", "d"] | ||
| Xliff | xinming: In this situation the $ is a dummy variable. | ||
| In other words, you CAN'T print its value. It doesn't exist. | |||
| m: my ($, $, @data) = <a b c d>; @data.perl.say; | 06:49 | ||
| camelia | ["c", "d"] | ||
| xinming | Xliff: Ok, So, only anonymous use of $ can be used, right? | ||
| Xliff | Yes. | ||
| m: ++$.say | |||
| camelia | 5===SORRY!5=== Error while compiling <tmp> Variable $.say used where no 'self' is available at <tmp>:1 ------> 3++$.say7⏏5<EOL> expecting any of: prefix |
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| Xliff | m: $++.say | ||
| camelia | 0 | ||
| Xliff | m: $++.say; $++.say | 06:50 | |
| camelia | 0 0 |
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| Xliff | m: for ^3 { $++.say } | ||
| camelia | 0 1 2 |
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| Xliff | m: (++$).say; $++.say | 06:51 | |
| camelia | 1 0 |
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| xinming | my %data; %data{$header.split(',')} = $line.split(','); return %data; <--- How can we write this into a single hash? | ||
| It's actually trying to do some easy csv loading. | |||
| return %($header.split(',') xx $line.split(',') ) | 06:52 | ||
| Let me try again. | |||
| Xliff | xinming: Isn't that what you are doing? | 06:53 | |
| xinming | m: my @x = <a b c>; my @y = <x y z>; %( (@x Z @y).flat).perl.say; | ||
| camelia | {:a("x"), :b("y"), :c("z")} | ||
| xinming | m: my @x = <a b c>; my @y = <x y z>; %( (@x Z @y).flat).perl.say; | ||
| camelia | {:a("x"), :b("y"), :c("z")} | ||
| xinming | Xliff: This is what I try to do. :-) | ||
| I mean, merge that into a single statement | 06:54 | ||
| m: my @x = <a b c>; my @y = <x y>; %( (@x Z @y).flat).perl.say; | |||
| camelia | {:a("x"), :b("y")} | ||
| Xliff | xinming: my $contents = $file.IO; my %data; (%data{$contents.line[0].split(',')} = .split(',') for .lines.skip(1)).Hash | 06:55 | |
| no-n | m: {}.WHAT | ||
| camelia | ( no output ) | ||
| no-n | m: {}.WHAT.say | ||
| camelia | (Hash) | ||
| Geth | doc: cb80067556 | (JJ Merelo)++ | doc/Language/contexts.pod6 Specifies numeric conversion of whitespace #2632 |
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| doc: d75b8f7565 | (JJ Merelo)++ | doc/Type/Any.pod6 Specifies behavior of non-int batch size in rotor #2632 |
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| doc: 4b0d38d5ce | (JJ Merelo)++ | doc/Type/Any.pod6 Comments behavior on negative gaps #2632 |
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| Xliff | xinming: That's buggy actually. | ||
| no-n | m: {foo => 'bar'}.WHAT.say | ||
| camelia | (Hash) | ||
| no-n | m: {foo => 'bar'}.perl.say | ||
| camelia | {:foo("bar")} | ||
| Xliff | xinming: sub readCSV($file) { my $contents = $file.IO; my %data; %data{$contents.line[0].split(',')} = .split(',') for .lines.skip(1); %data; } | ||
| Aand... that's still buggy. | 06:57 | ||
| xinming | m: my @x = <a b c>; my @y = <x y z>; %( (@x Z @y).flat).perl.say; | ||
| camelia | {:a("x"), :b("y"), :c("z")} | ||
| xinming | m: my @x = <a b c>; my @y = <x y>; %( @x Z=> @y).perl.say; | ||
| camelia | {:a("x"), :b("y")} | ||
| xinming | How can we force @x to be enumated in Zip operator? | ||
| no-n | m: <a b c>.keys.say | 06:58 | |
| camelia | (0 1 2) | ||
| xinming | hm | 06:59 | |
| no-n | m: my @a = <a b c>; say zip @a.keys, @a | ||
| camelia | ((0 a) (1 b) (2 c)) | ||
| Xliff | xinming: sub readCSV($file) { my $contents = $file.IO; my @header = $contents.lines[0].split(','); (@header Z=> $contents.lines.skip(1).split('. | ||
| xinming | m: my @x = <a b c>; my @y = <x y>; %( @x.keys.map({ @x[$_] => @y[$_] }) ).perl.say; | ||
| camelia | {:a("x"), :b("y"), :c(Any)} | ||
| Xliff | xinming: sub readCSV($file) { my $contents = $file.IO; my @header = $contents.lines[0].split(','); (@header Z=> $contents.lines.skip(1).split(',') } | ||
| xinming | Is there a way to do this shorter? | ||
| no-n | xinming: like that? | 07:00 | |
| xinming | m: my @x = <a b c>; my @y = <x y>; %( @x.keys.map({ @x[$_] => @y[$_] }) ).perl.say; | ||
| camelia | {:a("x"), :b("y"), :c(Any)} | ||
| xinming | no-n: Yea, but the @x.keys.map ... thing is too long. | ||
| Is there a shorter way. :-) | |||
| no-n | zip @x.keys, @x | ||
| Xliff | xinming: sub readCSV($file) { my $contents = $file.IO; my @header = $contents.lines[0].split(','); @data.push: %( (@header Z=> .split(',').flat ) for $contents.lines} | 07:01 | |
| And you need the return value, so... | |||
| xinming | Xliff: Thanks for your example, Actually, I use gather/take to implement that. | ||
| Xliff | xinming: sub readCSV($file) { my $contents = $file.IO; my @header = $contents.lines[0].split(','); @data.push: %( (@header Z=> .split(',').flat ) for $contents.lines; @data} | ||
| xinming: TIMTWOTDI | |||
| xinming | I just return a single row. with my @x = gather { ... take %( @header Z=> @line) } | ||
| yea | |||
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| xinming | no-n: Could you give an exmaple for that? | 07:01 | |
| Xliff | xinming: goog luck! | 07:02 | |
| no-n | m: my @x = <a b c>; for @x.keys, @x -> ($k, $v) { .say "$k: $v" } # xinming | ||
| camelia | 5===SORRY!5=== Error while compiling <tmp> Two terms in a row at <tmp>:1 ------> 3b c>; for @x.keys, @x -> ($k, $v) { .say7⏏5 "$k: $v" } # xinming expecting any of: infix infix stopper statement end… |
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| xinming | no-n: No, Not this. | ||
| no-n | hm | ||
| xinming | m: my @x = <a b c>; my @y = <x y>; %( @x Z=> @y).perl.say; <--- This one shouldn't have for loop. | 07:03 | |
| camelia | 5===SORRY!5=== Error while compiling <tmp> Unable to parse expression in quote words; couldn't find final '>' (corresponding starter was at line 1) at <tmp>:1 ------> 3 <--- This one shouldn't have for loop.7⏏5<EOL> expecting an… |
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| no-n | m: my @x = <a b c>; for (zip @x.keys, @x) -> ($k, $v) { say "$k => $v" } #ooops | 07:05 | |
| camelia | 0 => a 1 => b 2 => c |
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| xinming | Stil have for. | 07:06 | |
| If I wish to use for, I wouldn't ask this question, It's all for shorter and shorter statement | 07:07 | ||
| cpan-raku | New module released to CPAN! OLE::Storage_Lite (0.0.1) by 03JGOFF | 07:08 | |
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| Xliff | m: my @x = <a b c>; my @y = <x y>; %( @x Z=> @y).perl.say; | 07:28 | |
| camelia | {:a("x"), :b("y")} | ||
| Xliff | m: my @x = <a b c>; my @y = <x y>; my $h = %( @x Z=> @y).perl.say; $h.^name.say | 07:29 | |
| camelia | {:a("x"), :b("y")} Bool |
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| Xliff | m: my @x = <a b c>; my @y = <x y>; my $h = %( @x Z=> @y); $h.perl.say; $h.^name.say | ||
| camelia | ${:a("x"), :b("y")} Hash |
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| SmokeMachine | m: say <a b c>.kv | 07:31 | |
| camelia | (0 a 1 b 2 c) | ||
| SmokeMachine | Xliff: I’ve answered your comment... | 07:34 | |
| xinming | m: my @x = <a b c>; my @y = <x y>; %( @x Z=> @y).perl.say; | 07:39 | |
| camelia | {:a("x"), :b("y")} | ||
| xinming | SmokeMachine: In this example, How can we also force the length of @x for the resulting hash? | ||
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| SmokeMachine | m: my @x = <a b c>; my @y = <x y>; %( @x Z=> @y.pairs).perl.say # xinming something like this? | 07:46 | |
| camelia | {:a(0 => "x"), :b(1 => "y")} | ||
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| xinming | SmokeMachine: Nope | 07:55 | |
| m: my @x = <a b c>; my @y = <x y>; %( @x.keys.map({ @x[$_] => @y[$_] }) ).perl.say; | |||
| camelia | {:a("x"), :b("y"), :c(Any)} | ||
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| daxim | p6: class Foobar {}; my $A = [Foobar.new, Foobar.new]; my $L = (Foobar.new, Foobar.new); multi sub someop(Iterable[Foobar] $f) {}; someop($A); someop($L); | 08:24 | |
| camelia | Cannot resolve caller someop(Array:D); none of these signatures match: (Iterable[Foobar] $f) in block <unit> at <tmp> line 1 |
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| daxim | how do you write a type constraint where all elems of an iterable are instances of the same class? | ||
| moritz | daxim: you don't, because iterables aren't usually fully reified at the time of type checks, so you cannot check all the elements at type check time | 08:35 | |
| lizmat | weekly: github.com/drforr/raku-OLE-Storage_Lite | 08:36 | |
| notable6 | lizmat, Noted! (weekly) | ||
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| Geth | ecosystem: ec65603d34 | 0racle++ (committed using GitHub Web editor) | META.list Remove File::Stat and Point. They're on CPAN. |
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| cpan-raku | New module released to CPAN! Desktop::Notify (1.0.0) by 03FRITH | 10:29 | |
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| xinming | m: my @h; my @n; @n.push: @h; @h = <a b c>; @n.push: @(@h); @n.perl.say; | 11:35 | |
| camelia | [["a", "b", "c"], ["a", "b", "c"]] | ||
| xinming | m: my @h; my @n; @n.push: @h; @h = <a b c>; @n.push: [@h]; @n.perl.say; | ||
| camelia | [["a", "b", "c"], ["a", "b", "c"]] | ||
| xinming | m: my @h; my @n; @n.push: @h; @h = <a b c>; @n.push: @h,; @n.perl.say; | ||
| camelia | [["a", "b", "c"], ["a", "b", "c"]] | ||
| xinming | m: my @h = <a b c>; my @n; @n.push: @(@h); @h = <x y z>; @n.push: @(@h); @n.perl.say | 11:36 | |
| camelia | [["x", "y", "z"], ["x", "y", "z"]] | ||
| xinming | my @h = <a b c>; my @n; @n.push: [@h]; @h = <x y z>; @n.push: @(@h); @n.perl.say; | ||
| evalable6 | [["a", "b", "c"], ["x", "y", "z"]] | ||
| xinming | Anyone here can explain the semantic about this for me please? the diff between @(@h) and [@h] | 11:37 | |
| before, I thought that @(@h) is the same as [@h]; But it's definitely wrong in this case. | |||
| As I thought that @() is an array constructor which is like %() does | |||
| jnthn | @(@h) means @h.list, but it already is listy, so it's just the identity function | ||
| xinming | Ok, Thanks, I thought that @() is the same as %() :-) | 11:38 | |
| jnthn | [@h] iterates @h (per single argument rule) and creates an new array with the values produced by the iteration | ||
| It is | |||
| %(%h) is also the identity function | |||
| It's just that you probably usually pass something that is not hashish. | 11:39 | ||
| xinming | So, If we want to copy the content, and push it, We should call something like @a[] ? | ||
| jnthn | You should probably just call append :) | ||
| xinming | Ok, :-) | ||
| jnthn | But yes, you can do the zen slice too. | ||
| But append will be more efficient | |||
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| Tirifto | Thanks for the tip, guifa! I'll see if I could make that work for me… | 13:35 | |
| p6: class A {has Str $.msg is rw;} class B {has A $!a; method speak () {$!a.msg.say}} my $a = A.new(msg => “Boo!”); my $b = B.new(a => $a); $b.speak(); | 13:43 | ||
| camelia | 5===SORRY!5=== Error while compiling <tmp> Strange text after block (missing semicolon or comma?) at <tmp>:1 ------> 3class A {has Str $.msg is rw;}7⏏5 class B {has A $!a; method speak () { expecting any of: infix … |
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| Tirifto | p6: class A {has Str $.msg is rw;}; class B {has A $!a; method speak () {$!a.msg.say}}; my $a = A.new(msg => “Boo!”); my $b = B.new(a => $a); $b.speak(); | 13:46 | |
| camelia | Cannot look up attributes in a A type object in method msg at <tmp> line 1 in method speak at <tmp> line 1 in block <unit> at <tmp> line 1 |
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| sena_kun | Tirifto, your attribute must be public for automagically generated constructor to initialize that | 13:48 | |
| m: class A {has Str $.msg is rw;}; class B {has A $.a; method speak () {$!a.msg.say}}; my $a = A.new(msg => “Boo!”); my $b = B.new(a => $a); $b.speak(); | |||
| camelia | Boo! | ||
| sena_kun | otherwise you need to provide implementation of `BUILD` submethod... | 13:49 | |
| m: class A {has Str $.msg is rw;}; class B {has A $!a; submethod BUILD(:$a) { $!a = $a }; method speak () {$!a.msg.say}}; my $a = A.new(msg => “Boo!”); my $b = B.new(a => $a); $b.speak(); | |||
| camelia | Boo! | ||
| sena_kun | Tirifto, ^ | ||
| Tirifto | sena_kun: I have experimented with the twigil, but I don't understand why it matters. I thought an attribute would always be accessible from within its object, and that the only thing the ‘.’ twigil would do is generate an accessor method, which should have no effect on referencing the attribute directly via ‘$!’. Apparently I'm missing something here? :/ | 13:52 | |
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| jnthn | Tirifto: The . doesn't just generate an accessor, it also means that attribute can be initialized using the default object construction mechanism. | 13:59 | |
| (It also controls whether it's included in the .raku dump output, and also the default destructuring) | 14:00 | ||
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| Tirifto | jnthn: Since I'm giving B.new an object which has already been constructed ($a) in the example above, what exactly does the class need to construct when assigning $a to $b’s $!a? | 14:03 | |
| jnthn | m: class C { has $.a }; say C.new(a => 42).a | 14:05 | |
| camelia | 42 | ||
| jnthn | m: class C { has $!a }; say C.new(a => 42).a | ||
| camelia | No such method 'a' for invocant of type 'C' in block <unit> at <tmp> line 1 |
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| jnthn | hah, of course :) | ||
| m: class C { has $.a; method m() { say $!a } }; say C.new(a => 42).m | |||
| camelia | 42 True |
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| jnthn | m: class C { has $!a; method m() { say $!a } }; say C.new(a => 42).m | ||
| camelia | (Any) True |
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| jnthn | That's what I wanted to show. | ||
| It won't initialize $!a from a named constructor argument `a` in the second case | 14:06 | ||
| So the point is that when it's declared with `$!a` is *isn't* assigning $a to $b's $!a | 14:07 | ||
| Tirifto | Huh! I see. | 14:08 | |
| jnthn | This means that whenever you have a `has $!foo` in a class, then you know you can refactor it by only considering the code in the class body. | 14:10 | |
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| Geth | please-turn-off-the-autowatch-feature: ac33fbf818 | (Aleks-Daniel Jakimenko-Aleksejev)++ | README.md Add some text, should be good enough |
14:18 | |
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| Tirifto | Thank you, jnthn; I’ve come to some level of understanding now. :-) | 14:42 | |
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| uzl[m] | m: say "Hello", "world", "!"; | 15:10 | |
| camelia | Helloworld! | ||
| uzl[m] | m: say log 32, 2; | ||
| camelia | 5 | ||
| uzl[m] | m: log 32, 2; | 15:11 | |
| camelia | WARNINGS for <tmp>: Useless use of "log 32, 2" in expression "log 32, 2" in sink context (line 1) |
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| uzl[m] | Kind of weird. I was getting "Two terms in a row\n------> log⏏ 32, 2" for the same expression in the REPL. Probably I was inserting some non-visible character?! | 15:14 | |
| MasterDuke | the repl has a bunch of known problems, maybe you just found a new one? | 15:16 | |
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| uzl[m] | Yeah, that's probable. | 15:42 | |
| [Coke] | works fine here. is it reproducible on a fresh run of the REPL for you? If so, what version of perl6 are you using? | ||
| Geth | rakudo.org: 26dd1dac1b | (Daniel Mita)++ (committed using GitHub Web editor) | templates/people.html.ep Replace broken hugtastic link |
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| Tirifto | (Works fine here, too, for what it’s worth.) | 15:52 | |
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| [Coke] | ugh, -7ºC here today | 16:10 | |
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| Tirifto | [Coke]: Have you got a sweater? | 16:26 | |
| lizmat | +13ºC here | 16:29 | |
| which is a local record | |||
| too bad it was really rainy and overcast as well | |||
| Tirifto | Min or max record? :o | 16:30 | |
| [Coke] | Tirifto: I was out in shorts earlier today, guess I shouldn't complain. | 16:31 | |
| Wearing a coat in my house atm, though. | |||
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| lizmat | Tirifto: max | 16:33 | |
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| cpan-raku | New module released to CPAN! Gnome::GObject (0.15.8) by 03MARTIMM | 16:35 | |
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| Tirifto | Well, on the bright side, you get the opportunity to use a coat and an umbrella respectively, both of which are pretty cool articles! | 16:47 | |
| cpan-raku | New module released to CPAN! Gnome::Gtk3 (0.21.1.2) by 03MARTIMM | 16:48 | |
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| Tirifto | And it looks like I can make a wrapper object to selectively block write access to a certain object’s attributes by adding that object as an attribute which handles whatever, and then overriding its read accessors with my custom ones, whereafter the default write accessors no longer appear to work on it. | 16:51 | |
| (Although I don't know how the default write accessor is implemented, given that just setting a custom read accessor can invalidate it; might be missing something still.) | 16:55 | ||
| lizmat | Tirifto: you only need to make sure the return value of the original accessor is decontainerized | ||
| Geth | ¦ problem-solving: AlexDaniel assigned to JJ Issue SEO for the keyword "rakulang" seems poor github.com/Raku/problem-solving/issues/147 | 16:57 | |
| lizmat | m: class A { has $.a is rw = 42 }; role B { method a() { callsame<> } }; my $a := A.new; my $b := $a but B; dd $b.a = 666 # Tirifto | 17:00 | |
| camelia | Cannot modify an immutable Int (42) in block <unit> at <tmp> line 1 |
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| Tirifto | lizmat: Thanks for the example; I'll need to sit on that for a while. xP | 17:04 | |
| lizmat | the <> is the decontainerization | ||
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| kktt007 | ddd | 17:12 | |
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| jnthn | lizmat: Not sure you need to decont since method a is not marked `is rw` nor `is raw`, so it will strip the container anyway :) | 17:13 | |
| lizmat | m: class A { has $.a is rw = 42 }; role B { method a() { callsame } }; my $a := A.new; my $b := $a but B; dd $b.a = 666 # Tirifto | 17:14 | |
| camelia | Cannot modify an immutable Int (42) in block <unit> at <tmp> line 1 |
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| lizmat | he | ||
| TIL | |||
| or rather, TIR (Today I Realized :-) | 17:18 | ||
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| jmerelo | Hi | 17:37 | |
| Is there any way to map a number to an unicode character? That number is computed or in a variable | |||
| I'm trying this, but it does not work, probably for a good reason | 17:38 | ||
| m: say "\c[{ 0x25A1 + 2 } ]" | |||
| camelia | 5===SORRY!5=== Error while compiling <tmp> Unrecognized \c character at <tmp>:1 ------> 3say "\c[7⏏5{ 0x25A1 + 2 } ]" expecting any of: argument list double quotes term |
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| Grinnz | chr()? | 17:39 | |
| jmerelo | Grinnz: oh yes | ||
| Sorry | |||
| m: say char( 0x25A1 + 2 ) | |||
| camelia | 5===SORRY!5=== Error while compiling <tmp> Undeclared routine: char used at line 1. Did you mean 'chars', 'chr'? |
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| jmerelo | m: say chr( 0x25A1 + 2 ) | ||
| camelia | ▣ | ||
| jmerelo | I mean, really | ||
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| jmerelo smacks head and goes back to work | 17:40 | ||
| thanks Grinnz! | |||
| uzl[m] | Coke: It's working fine here too. I guess I somehow inserted a nonvisible character 😅�😅�. I'm using Rakudo 2019.11. | 17:45 | |
| tbrowder | hi, #raku people | 17:49 | |
| tellable6 | 2020-01-03T08:14:17Z #raku <jmerelo> tbrowder raku-advent.blog is cool. | ||
| jmerelo | Hi, tbrowder ! | 17:50 | |
| tbrowder | we now have doman raku-advent.blog for our own | ||
| jmerelo: hi | |||
| jmerelo | tbrowder: great! | 17:51 | |
| tbrowder | i'm on holland-america's ms zuiderdam tied up at costa maya with internet access till this afternoon | 17:52 | |
| jmerelo | Have a great trip | ||
| For the time it's not working, but I guess DNS will catch up in a while. | |||
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| tbrowder | you can take the new domain and get it all set up? | 17:52 | |
| jj, i just claimed it so it may be a while | 17:53 | ||
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| tbrowder | anyone interested in number bases check out my module Number::More | 17:56 | |
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| tbrowder | i'm reworking it into a new, improved module Number::Rebase with up to base 91. one advantage of base 91 is to have a UUID in 20 characters of ASCII (good for RDBMS unique keys) | 18:01 | |
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| rywo | if class attributes are $!foo and $.foo what is $foo in a class? a static field? | 19:12 | |
| as in `class foo{ my $whatisthis }` | 19:16 | ||
| in contrast to `class foo{ has $!pravate }` | |||
| moritz | it's just a variable that's lexical to the class body | 19:25 | |
| (also, you need a space between the class name and the {) | |||
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| rywo | is it unique to each instance of the class? | 19:31 | |
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| moritz | no | 19:37 | |
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| rywo | ah ok. thanks. | 19:53 | |
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| Geth | doc: 670d0af874 | (Stoned Elipot)++ | doc/Language/io.pod6 Fix link to unlink routine |
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| cpan-raku | New module released to CPAN! OLE::Storage_Lite (0.0.2) by 03JGOFF | 22:26 | |
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