[Coke] welcome aboard 00:00
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korvo Solved it! Humming-Bird::Core::listen() requires a :no-block argument in order to actually `start` concurrently. 01:13
disbot7 <aruniecrisps> @librasteve sure I can do that, what exactly are you looking for? 02:28
<aruniecrisps> Or can it just be any snippet? 02:30
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disbot7 <jubilatious1_98524> @aruniecrisps have you tried NFKD decomposition? docs.raku.org/routine/NFKD 03:04
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Voldenet jubilatious1_98524: it's not a contradiction – to group things you need a container for the grouping (a scope) and another value that escapes that scope is the only one preserved 05:16
disbot7 <jubilatious1_98524> @Voldenet so what's the 'escape key'? 05:17
Voldenet 'escape key' hm? 05:18
what do you mean
m: my $result = do { my $a = 1; my $b = 2; $a + $b }; say $result # this is the pattern - $result gets assigned, but $a and $b are not preserved 05:19
camelia 3
Voldenet it can get a lot more complicated with FINALIZER module for instance 05:20
disbot7 <jubilatious1_98524> Have you posted this do { ... } idiom previously? I might have missed it. 05:21
Voldenet yes a while earlier, but without 'do'
disbot7 <jubilatious1_98524> It doesn't seem exactly like the Rust code you posted, which talked about immutability of variables manipulated in that blog code-example. 05:23
Voldenet in C# there's `using(var x = new SomeIDisposableImpl()) { … }` for tracking IDisposable values
it's a bit similar to using do-block
where you can `my $item = do { using FINALIZER; my $x = FoosRepository.new(:conn(await $connections.connect()); $x.items.fetch(:id(42)); }; ` 05:25
disbot7 <jubilatious1_98524> In my Raku one-liners, I use BEGIN blocks all the time: unix.stackexchange.com/search?q=us...7738+BEGIN
Voldenet obviously rust is a different kind of language, but you can make things immutable by turning it into List on the end 05:26
for example
disbot7 <jubilatious1_98524> Here are some (other) examples with state variables: unix.stackexchange.com/search?q=us...7738+state
<jubilatious1_98524> So I thought a hypothetical {STATE .... } keyword would replicate what you wanted to bring over from Rust. 05:28
Voldenet I agree that BEGIN blocks are very useful, I still do time things with `now - BEGIN now` :>
though I guess do-block is just something that's totally unnecessary
it hardly does anything
so using it in this context is just not very obvious 05:29
disbot7 <jubilatious1_98524> (Never heard of FINALIZER before...).
Voldenet very cool module, it's something that should be in stdlib, basically it implements the IDisposable (C#) AutoCloseable (java) or Drop (rust) patterns 05:31
so instead of directly using DBIish, you'd use method attaching .dispose to current scope 05:33
disbot7 <jubilatious1_98524> do blocks make for loops imperative, I'll use it instead of (complicated)map calls: unix.stackexchange.com/a/734258/227738 05:37
Voldenet I use for loops if I plan for them to have side effects 05:38
.map is for things without side effects 05:39
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disbot7 <jubilatious1_98524> As long as you assign outside the do for loop, there doesn't seem to be any difference from map. 05:41
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Voldenet m: say do for ^10 { $_ * 10 } # this feels a bit weird to write compared to `(^10).map({ $_ * 10 })` 05:42
camelia (0 10 20 30 40 50 60 70 80 90)
Voldenet of course, in the end they're both equivalent in what they do, so it's only a matter of preference 05:45
disbot7 <jubilatious1_98524> m: my @a = 0..9; @a = do for @a { <a b c d e f g h i j>[ $_ ] }; .say for @a.pairs; 05:48
<jubilatious1_98524> raku -e 'my @a = 0..9; @a = do for @a { <a b c d e f g h i j>[ $_ ] }; .say for @a.pairs;' 0 => a 1 => b 2 => c 3 => d 4 => e 5 => f 6 => g 7 => h 8 => i 9 => j
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SmokeMachine For making stuff immutable, one could also use something like this: raku.land/zef:FCO/ValueClass 05:48
Or maybe something like these: raku.land/zef:FCO/Functional::LinkedList raku.land/zef:FCO/Functional::Queue or raku.land/zef:FCO/Functional::Stack 05:50
Voldenet (it's not the same as in rust - in rust mutability will stop some optimizations and immutability could make them possible) 05:51
rust is just very different
SmokeMachine Sorry, I’m not comparing with rust… (I don’t know rust) 05:52
Voldenet I mean, language knows the concept of mutability
in raku, language will asume that ValueClass is mutable 05:53
the only thing preventing mutation is Proxy STORE dying 05:54
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Voldenet the above example doesn't need for btw 06:27
m: my @a = 0..9; @a = do for @a { <a b c d e f g h i j>[ $_ ] }; .say for @a.pairs; # this
camelia 0 => a
1 => b
2 => c
3 => d
4 => e
5 => f
6 => g
7 => h
8 => i
9 => j
Voldenet m: my @a = <a b c d e f g h i j>[0..9]; .say for @a.pairs; 06:28
camelia 0 => a
1 => b
2 => c
3 => d
4 => e
5 => f
6 => g
7 => h
8 => i
9 => j
korvo LangJam GameJam is done. I made a little S-expression language declaring an idle game and a friend wrote a little scenario. I'll have a blog post ready in a day or two.
Voldenet m: my $a = 0; my $b = 1; say do for ^10 { my $n = $b + $a; $b = $a; $a = $n; $n } # this is something that totally wouldn't work with .map 06:29
camelia (1 1 2 3 5 8 13 21 34 55)
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disbot7 <jubilatious1_98524> m: my $a = 0; my $b = 1; for ^10 { my $n = $b + $a; $b = $a; $a = $n; print "$n " }; put(); 07:44
<jubilatious1_98524> raku -e 'my $a = 0; my $b = 1; for ^10 { my $n = $b + $a; $b = $a; $a = $n; print "$n " }; put(); ' 1 1 2 3 5 8 13 21 34 55 07:45
<jubilatious1_98524> @Voldenet did you not just show that the code worked without map? 07:46
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Voldenet yes, maybe I mistyped, but from my understanding it might not work with map 08:54
m: my $a = 0; my $b = 1; my $x = (^10).map({ my $n = $b + $a; $b = $a; $a = $n; $n }); say $x, $x
camelia (1 1 2 3 5 8 13 21 34 55)(1 1 2 3 5 8 13 21 34 55)
Voldenet Yes, it happens to work as expected, maybe it's even documented

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