This channel is intended for people just starting with the Raku Programming Language (raku.org). Logs are available at irclogs.raku.org/raku-beginner/live.html
Set by lizmat on 8 June 2022.
jaguart stevied - do you want a code review of your mod (albeit from a newbie?) - I'll give it a go if you want, so I can learn too 🙂 00:43
Nemokosch good morning :DD
jaguart things like: dir-check fails if $dir.f -> but maybe should probably be fail unless $dir.d because symlinks - which might need a follow to see if they link to a file or a folder, etc. 00:45
Morning Nemo 😄
stevied sure, absolutely 01:03
i'm not much past newb and have a lot to learn 01:04
jaguart do you have any thoughts on how? I could create a github pull request and then we can comment on my alternates? 01:05
stevied ok, let's try that
thanks!
jaguart ok - give me a few hours, have some bits to do first 01:06
stevied ok
I forget how to embed a variable in a variable: @.$ext-files 01:07
$ext is the variable
Nemokosch and this is an attribute
does @."$ext-files" not work? 01:08
by the way, really, what is the obsession with this hack? :cameliathink:
stevied doesn't work, no
Nemokosch are Maps dull these days?
jaguart do you mean you want to interpolate an attribute name? ala docs.raku.org/language/packages#In...into_names
stevied yeah, an attribute
jaguart never tried this for attributes thoug 01:09
stevied ok, cool. that was the section I was looking for. forgot where to find it
Nemokosch still not sure how this would apply to attributes
I thought what I wrote would work for method calls at least 01:10
jaguart sounds like an anti-pattern though - why not have %.dir where you lookup using %.dir{$ext}
stevied yeah, good idea
jaguart the ."" method lookup need parens I think - ."$ext"() 01:11
Nemokosch m: my $lol = 'polymod'; say 5."$lol"();
yes, I think it works
had to realize there is no evalbot for the time being
the cost of the bridge switchover
jaguart did someone kill her :o
Nemokosch the thing is, gfldex hosted the evalbot AND the bridge, they might have been the same program even 01:12
so now that there was a bit of motion to get a bridge that isn't tied to gfldex but rather the discord mods, the evalbot function isn't solved yet 01:13
jaguart so no m: use nqp;... 😉
Nemokosch not gonna lie, this bridge looks nice at least, if it's written in plain old JS(/TS) 01:15
maybe there can be a glot.io solution for evaling, we'll see, no stress for now 😄
the OG move would be to adopt the Camelia IRC bot, of course 01:16
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jack9 m: my $str = 'x'; class Foo { has $.x; } say Foo.new.$str; 06:15
jaguart jack9: maybe my $m = 'x'; class C { has $.x; }; say C.new(:x("y"))."$m"(); 06:49
the ."$m"() --> calls method by interpolated name .""() 06:51
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jack9 can you use c++ instantiation syntax in raku 10:05
Nemokosch do you mean like new Classname? 10:06
jack9 yes 10:17
Nemokosch You could fake it I guess but there doesn't seem to be any point. A constructor still has the API of a method. 10:36
you could invent a prefix new operator, for example but not sure how it would add up 10:37
jack9 you can literally create operators in raku 10:47
with precedence?
Skarsnik yes, you can even inject new grammar (slang) 10:54
jack9 raku be context sensitive 10:58
Nemokosch yes, you can kind of create DSL's 11:06
but this will probably be easier and more stable once the RakuAST developments mature 11:07
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jack9 RakuAST? is that a module to expose raku asts? 11:18
Nemokosch a bit more than that: it's basically a new representation of Raku code 11:21
a representation that both a compiler and an author can use
as things stood for a long, long time, there was the written textual code and the Rakudo parser tried to turn it into its own VM representation, QAST 11:23
QAST is something the Rakudo backends, especially MoarVM but I think basically all three, like to consume 11:24
but it has quite little to do with Raku's syntax structure per se. A lot of things are dismantled and generated to leverage the backends that consume it 11:25
so the idea was that it would be much easier to generate code, both for the compiler and especially for the authors, if there was a way to represent Raku code directly, without either having to parse it again or basically use a lower-level, highly compiler-specific structure that isn't really Raku 11:26
I only took a couple of looks at it but I can say (and it's pretty much agreed by more experienced developers) that the compiler also got much cleaner, it's way easier to understand what is going on 11:27
if you check #raku-dev-irc , it's (almost) all about RakuAST developments at the moment. The parser is not yet used but it's actively developed and one can try it on a fresh build of Rakudo with RAKUDO_RAKUAST=1 env 11:29
and module authors can try generating code with RakuAST nodes already 11:30
jack9 so like, python ast but more 12:11
Nemokosch probably something like that, yes 12:20
jack9 is there a way to see moar bytecode 13:40
Nemokosch I think this is a #moarvm-irc kind of question 13:42
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stevied I'm not doing something right here: method has-legacy-extensions(*@exts where {@ext.grep: $_} ) 14:48
I want to limit the arguments that can be passed to the strings that are in @ext
lizmat And yet another Rakudo Weekly News hits the Net: rakudoweekly.blog/2023/01/23/2023-...nk-you-jj/ 15:06
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rf stevied: Try where { @ext.index($_) !~~ Nil } 15:58
Nahita f(*@args where not @args (-) @allowed) 16:05
f(*@args where @args ⊆ @allowed) 16:07
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stevied @Nahita thanks! worked perfectly. even when for when @args is empty, which is what i want 16:21
Nemokosch as a sidenote: *@args is a flattening slurpy, **@args is a structure-preserving slurpy and +@args is a slurpy that unrolls a single argument but otherwise it's like **@args 16:23
stevied ok. yeah, forgot there were even different kinds of slurpies. you could literally write an entire book about signature arguments 16:24
there's a good reason raku took almost 20 years to write 16:27
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Nemokosch @jack9 mastodon.lol/@julia/109717916604491146 another similar example to what I did with augment class and adding a method 18:10
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stevied any module for searching and replacing content in a single file? 20:53
Nemokosch pretty sure you could run rak that way 20:55
what do you have in mind?
stevied I want to easily update a META6.json file. Find all instances of String X, Y, and Z and replace with String A, B, and C 20:56
I could roll it myself but would rather not
Nemokosch okay, now there is not one pattern and one output but 3 literal strings 20:58
it makes a difference, for the latter, trans might be a better fit
stevied there could be less than 3 or many more than three
Nemokosch what do you need these indefinite string subsitutions for? 20:59
stevied updating the names of file extensions 21:00
Nemokosch I'm thinking if the META6 module is more convenient to work with 21:01
so yeah 21:15
stevied this one? raku.land/zef:jonathanstowe/META6 21:16
Nemokosch yep
use META6; my $meta = META6.new(file => 'META6.json'); # whatever file path
stevied how does that make it easier for me to edit an existing file? 21:17
Nemokosch by reading that existing file and turning it into an object and a map? 21:18
stevied yeah. other option is to just do a slup of the file and do some regexes on it 21:19
that's easier for me, at least
Nemokosch well then do that
I for one think it's harder, besides being more fragile 21:20
stevied is the provides section the only part of the file that would have file extensions? 21:22
I think it is. 21:23
Nemokosch in theory the resources part could also contain relevant files, although it typically wouldn'
stevied true, at least not related to the operation of the module. thought I should probably exclude that directory when I search for legacy extensions 21:24
actually, there are probably other dirs like that. hmmm.
using a regex will leave a smaller footprint. won't mess with the persons' whitespace or anything like that. 21:27
Nemokosch whether the latter is a good thing could be debated 21:28
stevied can you think of a time when .t or .pod6 files would ever be listed in META6.json? 21:29
Nemokosch pod6 I could imagine in the resources, especially if you are finanalyst who really fancies Raku-native formats for basically everything
by the way, I'm also somewhat disappointed by the META6 module, I thought it would have a nicer interface... 21:30
stevied yeah, I don't think the module should touch anything in resources 21:31
Nemokosch the question is really, how much foolproof you want to be, how much it's a problem if some files get unwanted modifications
stevied well, the user will have an opportunity to review what gets changed before the module does anything 21:32
at least in the command line version of the module
p6steve github.com/jonathanstowe/META6 maybe could help 21:34
stevied i think if I do a regex in just the "provides" section of the file and replace extensions between .\w+" I should be safe
Nemokosch been there 😛
you know 21:36
I'd be curious of a parser module
that can give you a cursor in the file to the parsed nodes
where they start, where they end
I don't know if there is such a thing, and especially not how to look for this concept
stevied seems like it could be done easily enough with json 21:37
Nemokosch anyway, this is getting a bit trivia style 21:40
it would be good to have a META6.json scheme "set into stone" more or less, I wouldn't be surprised if a valid scheme could be parsed with regex only even
no deep nesting 21:41
stevied yeah, you'd think there would be a parser for existing meta6 files 21:43
oh, wait, that module can 21:45
Nemokosch it can but it discards whitespace and stuff 21:48
stevied well, what I'm thinking is I do a hybrid approach. grab the provides section as json, make my changes to it, and then do a regex to replace the provides section in the original file 21:50
jaguart watch out for mi6 build though - that rewrites the provides section based on the file system 21:52
in fact - maybe that's what you want? update teh filesystem and then run mi6 build
stevied i'm changing the names of the files in the filesystem first so that shouldn't be a problem
jaguart yeah - but that's exactly what mi6 does for you 21:53
stevied but mi6 build would change their meta6.json file all around
i don't want to touch anythign other than the file extensions
jaguart true - it does a sanity check that the provides matches the file system - because bad things happen when they dont
and there seems little point in fixing something broken so it is still broken 🙂 21:54
also mi6 has been tested against a lot of modules and is in active use on multi platforms... 21:55
how are you going to get all the dists to accept your pull requests?
esp given that many of them don't respond, even after years of peep asking? 21:56
are you going to fork all the dists? 😮 21:57
stevied yeah, i'm going to fork all of them locally
probably just do a few a day to start to see how it goes 21:58
it'll help weed out module that have been abandoned
jaguart I see that your #166 fix is released in mi6 🙂 21:59
stevied yeah, gotta test it out. 22:01
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Nemokosch #166 fix of what? 23:06
btw @jaguart the evalbot doesn't... exist, yet

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