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tbrowder no need now, i see Voldenet already mentioned the oopsie 01:48
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perryprog > how can we on "normal" irc pm with the growing number of ppl on discord and other strange places? 04:10
by peer pressuring them to come back to irc
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disbot <librasteve> lol … i am trying hard to make the journey from Discord to IRC. Discord has the convenience of multiple server tabs to eg the HTMX and Polars servers, works well on various devices, supports media sharing and keeps the message history. otoh IRC doesn’t mess with text such as code for camelia and the bots are more reliable. IRCcloud has helped … it is always logged in in ios so i get the message history there … my 07:24
macbook habit is to log off a few times a day so i need something like screen or tmux to keep the history live and then would run them on my aws instance which I haven’t got around to yet…
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tbrowder yes, Irccloud has been Godsend for me who has not figured out the overarching msg stuff. and their suport folks can fix it when i do something stupid 10:48
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Geth ¦ raku.org: librasteve self-assigned Pin Deps github.com/Raku/raku.org/issues/256 12:37
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arkiuat I'm on MacOS as well, but I just keep a browser tab open to irclogs.raku.org/raku/live.html 16:48
tellable6 2025-09-02T07:44:47Z #raku <librasteve> arkiuat: thanks - now fixed
arkiuat not familiar with IRCcloud 16:49
so I was wondering about my lack of luck in ever constraining return values of subs that return a List or Seq 16:50
has anyone else ever tried to do this and run into troubles with it?
[Coke] Are you trying to use a list all of a type? or just a List?
arkiuat [Coke], I've tried both I think 16:51
certainly the former, since I don't see much point in constraining a return value to any ole List 16:52
[Coke] m: sub b returns List { return 1,2,3}; b;
camelia ( no output )
[Coke] m: sub a returns List { return 3 }; a
camelia Type check failed for return value; expected List but got Int
in sub a at <tmp> line 1
in block <unit> at <tmp> line 1
arkiuat I guess I'll have to settle for restraining the return value to any ole List, then 16:54
there's no way to constrain it to a List[Int] or suchlike?
[Coke] m: sub b returns Array[Int] { my @a of Int = 1,2,3 } ; b 16:55
camelia ( no output )
[Coke] Don't think you can do that with list - but you can with Array, for sure. 16:56
arkiuat Okay, so List and Seq "cannot be parametrized" (that's in the error message), and I need to containerize the return value if I want to constrain the type of its component items. Is that right? 16:58
[Coke]++ 16:59
[Coke] I believe that is correct. (need the container to "hold" the parameterization) 17:00
arkiuat Gotcha, thanks! 17:01
[Coke] m: sub b returns Array[Int] { my @a =1,2,3}; b
camelia Type check failed for return value; expected Array[Int] but got Array. You have to pass an explicitly typed
array, not one that just might happen to contain elements of the correct
type.
in sub b at <tmp> line 1
in block <unit> at <tmp> li…
[Coke] ^^
arkiuat Right
[Coke] (and you can't "guess" at the type, has to be explicit)
Good luck. :)
arkiuat Well, it works. I mean I think I'll get more helpful error messages this way when I break stuff. But having the return value of the sub begin with "my @r of Capture =" is pretty funny-looking if you ask me. 17:07
(it was returning a list of 4 Captures originally) 17:08
librasteve you may want to try coercion in the return type 18:07
m: sub fn(--> Hash()) { :a(0), :b(1) }; dd fn() 18:11
evalable6 {:a(0), :b(1)}
Raku eval {:a(0), :b(1)}
librasteve m: sub fn(--> Hash()) { :a(0), :b(1) }; say fn().WHAT
evalable6 (Hash)
Raku eval (Hash)
librasteve not sure if/how that interacts with the Array[Int] types - would need to experiment a bit 18:12
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arkiuat hmm! 18:46
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librasteve m: 1.6605402e-27.FatRat.nude 21:07
evalable6
Raku eval
librasteve m: 1.6605402e-27.FatRat.nude.say
evalable6 (0 1)
Raku eval (0 1)
librasteve this feels wrong to me ... since the Num (IEEE 1754 64-bit FP) has finite information, it can be expressed as a FatRat without too much trouble, seems that Raku holds the opinion that an irrational number cannot be converted to a rational one 21:11
m: 1e-1.FatRat.nude.say 21:12
evalable6 (1 10)
Raku eval (1 10)
perryprog "fatrat nude say" is a crazy thing to come up in a programming language 100% unintentionally
librasteve hmm sometimes it works, I wonder if Num => FatRat is implemented as Num => Rat => FatRat (which should be the other way around) 21:13

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