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🦋 Welcome to the MAIN() IRC channel of the Raku Programming Language (raku.org). Log available at irclogs.raku.org/raku/live.html . If you're a beginner, you can also check out the #raku-beginner channel! Set by lizmat on 6 September 2022. |
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| disbot | <simon_sibl> m: my $lines = (xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))); my $p1; for $lines { m:g/'mul('(\d+)','(\d+)')' {$p1 += $0*$1}/ }; say $p1; | 01:07 | |
| evalable6 | (exit code 1) ===SORRY!=== Error while compilin… | ||
| simon_sibl, Full output: gist.github.com/48a09a35f9fd68ecf3...a804f3869a | |||
| disbot | <Raku eval> Failed to create container: Failed while sending request: Failed read response: Resource temporarily unavailable (os error 11) | 01:08 | |
| <simon_sibl> @jubilatious1_98524 , if you run this code you will see that it only does the first match and then stop | |||
| <simon_sibl> only way to force it to do all the matches is to add a loop over $/, and I dont understand why | 01:09 | ||
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| Voldenet | simon_sibl: I bet regex returns iterable but iterable isn't consumed by anything | 01:18 | |
| m: $_ = "ab ac ad ae af"; m:g/ (a.) { [$0].say } / | 01:20 | ||
| camelia | [｢ab｣] | ||
| Voldenet | m: $_ = "ab ac ad ae af"; m:g/ (a.) { [$0].say } /.Array | ||
| camelia | [｢ab｣] [｢ac｣] [｢ad｣] [｢ae｣] [｢af｣] |
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| Voldenet | m: $_ = "ab ac ad ae af"; m:g/ (a.) { [$0].say } /.iterator.sink-all | 01:21 | |
| camelia | [｢ab｣] [｢ac｣] [｢ad｣] [｢ae｣] [｢af｣] |
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| disbot | <simon_sibl> I would have bet that ! | 01:22 | |
| <simon_sibl> Thanks to your example I’ll be able to make my code even shorter 😆🙏 | |||
| <simon_sibl> Iterator sink-all is better memory wise than the Array right ? | 01:23 | ||
| <simon_sibl> I would guess the array to allocate all the matches while the iterator would do a little by little ? | |||
| Voldenet | yes, sink-all simply keeps doing `skip-one` and does nothing with the value | 01:24 | |
| disbot | <simon_sibl> Thanks !! | 01:29 | |
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| disbot | <jubilatious1_98524> Not sure if I understand... all I have to do is andthen sum $/ and it works. ~ % printf "10 12\n20 22\n22 24\n" | \ raku -ne 'BEGIN my $sum; m:g/ (\d) (\d) { $sum += (10*$0)+$1 } / andthen put sum $/; END say "total: ", $sum;' 22 42 46 total: 110 | 02:06 | |
| <jubilatious1_98524> m: raku -e ' $_ = "ab ac ad ae af"; m:g/ (a.) { $0.say } / andthen $/.Str; | 02:13 | ||
| evalable6 | (exit code 1) ===SORRY!=== Error while compilin… | ||
| jubilatious1_98524, Full output: gist.github.com/a67e5cb720de07e836...d7ac319e70 | |||
| disbot | <Raku eval> Failed to create container: Failed while sending request: Failed read response: Resource temporarily unavailable (os error 11) | ||
| <jubilatious1_98524> m: $_ = "ab ac ad ae af"; m:g/ (a.) { $0.say } / andthen $/.Str; | 02:14 | ||
| evalable6 | ab ac ad ae af |
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| disbot | <Raku eval> Failed to create container: Failed while sending request: Failed read response: Resource temporarily unavailable (os error 11) | ||
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| Voldenet | that's easy, .Str just evaluates all matches first | 03:30 | |
| m: $_ = "ab ac ad ae af"; m:g/ (a.) { $0.say } / andthen $/.head(2).Str.say | |||
| camelia | ab ac ad ab ac |
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| Voldenet | but it doesn't have to | ||
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| Voldenet | and it has to evaluate whole regex, because .Str returns matched text | 03:34 | |
| and probably copies the string on the way | |||
| a lot of methods evaluate all matches in some way | 03:36 | ||
| m: $_ = "ab ac ad ae af"; m:g/ (a.) { $0.say } / ~~ 345213625 # fair number generated with 9 dice rolls, guaranteed to be unique ;> | |||
| camelia | ab ac ad ae af |
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| linkable6 | (2024-12-11) github.com/vsilet/commited/commit/345213625e | ||
| Voldenet | not as unique as I hoped | 03:37 | |
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| disbot | <jubilatious1_98524> > that's easy I should have guessed you'd say that. | 05:06 | |
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| Voldenet | by easy I meant that you can guess why it evaluates everything just by looking at what Str returns | 07:25 | |
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| Voldenet | it's more complicated when you use it with ~~ – is every match compared to the right side somehow or does Match object have to equal right side, are all matches evaluated at the end, or one by one etc. | 07:27 | |
| in fact, I have no idea what the above smartmatch fully does, normally I think it checks if regex matches some value(s), like "ab" or <ab ac> | 07:40 | ||
| but in case of numbers it's probably… hm, matches count? | |||
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| Voldenet | m: $_ = "ab ac ad ae af"; say so m:g/ (a.) { $0.say } / ~~ 3 | 07:43 | |
| camelia | ab ac ad ae af False |
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| Voldenet | m: $_ = "ab ac ad ae af"; say so m:g/ (a.) { $0.say } / ~~ 5 | ||
| camelia | ab ac ad ae af True |
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| Voldenet | so it's still extracting list of all matches no matter what it's compared to | 07:44 | |
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| Voldenet | I think .Int gets used which returns number of results, so obviously extracts all matches too | 07:47 | |
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| Voldenet | Ah, it's actually list's int method that gets used, not Match.Int | 07:50 | |
| m: $_ = "ab ac ad ae af"; say so m/ (a.) { $0.say } / ~~ 5 # error, because "ab" is not an int | |||
| camelia | ab False |
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| Voldenet | m: $_ = "ab ac ad ae af"; say m/ (a.) { $0.say } / ~~ 5 # error, because "ab" is not an int | ||
| camelia | ab False |
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| Voldenet | m: $_ = "ab ac ad ae af"; say m/ (a.) { $0.say } /.Int # error, .Int called not on a list | 07:51 | |
| camelia | abCannot convert string to number: base-10 number must begin with valid digits or '.' in '<HERE>ab' (indicated by <HERE>) in block <unit> at <tmp> line 1 |
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| Voldenet | m: $_ = "ab ac ad ae af"; say m:g/ (a.) { $0.say } /.Int # no error, .Int called on a list | 07:52 | |
| camelia | ab ac ad ae af 5 |
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| Voldenet | so .Str also actually gets called on a list in that case | 07:54 | |
| …or so I think ;p | 07:55 | ||
| (the example with ~~ 5 had the failure too, but "so" masks it) | 07:56 | ||
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| melezhik | Weekly: news.ycombinator.com/item?id=44939615 | 11:52 | |
| Please vote if you like it, thanks | 11:53 | ||
| lizmat | weekly: news.ycombinator.com/item?id=44939615 | 11:55 | |
| notable6 | lizmat, Noted! (weekly) | ||
| lizmat | must apparently be lowercase | ||
| melezhik | Thanks Liz | 11:58 | |
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| librasteve_ | notable6 weekly | 18:43 | |
| notable6: weekly | 18:44 | ||
| notable6 | librasteve_, 6 notes: gist.github.com/fdc230713f46ea632a...6799d7f397 | ||
| librasteve_ | notable6: weekly reset | 18:49 | |
| notable6 | librasteve_, Moved existing notes to “weekly_2025-08-18T18:49:33Z” | ||
| librasteve_ | rakudoweekly.blog/2025/08/18/2025-...esilience/ | 18:55 | |
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| lizmat | librasteve_++ | 19:36 | |
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