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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. |
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| Aozen | first day here i am new | 02:36 | |
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| Sussysham | Good morning everyone | 04:48 | |
| greetings Aozen | |||
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| nommef | hello, does somebody know why first `say` is ok, but the second one freezes the program? | 13:44 | |
| ``` | |||
| my %cfg1 = r => "^'D '"; | |||
| my $tmp-r = %cfg1<r>; | |||
| %cfg1<r> = / <$tmp-r> /; | |||
| my %cfg2 = r => "^'D '"; | |||
| %cfg2<r> = / <{%cfg2<r>}> /; | |||
| say "D d" ~~ %cfg1<r>; | |||
| say "D d" ~~ %cfg2<r>; | |||
| ``` | |||
| I thought they are doing the same thing, but apparently not -_- | |||
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| Nemokosch | could you write it in a more readable way, preferably in a gist/pastebin? | 14:00 | |
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| lucs | @Nemokosch Yeah, it's pretty unreadable, but looking at it from IRC, it's not too bad. The problem when we look at it in Discord is that it uses a non-monospace font. And those triple backquotes that were used in IRC didn't apply in Discord. Fortunately, those problems may soon be over, as Libera (the IRC hosts) posted this this morning: "[Global Notice] Good Morning All! Following our Annual General Meeting | 14:39 | |
| that took place last night (31st), we have decided that Libera will be pivoting to a Discord server ( discord.gg/4QNt6VjT )! We feel this is the best way forward for our various communities. Please let us know what you think in #libera-discord" | |||
| lucs | nommef: Try replacing the 5th line with: %cfg2<r> = / <{note "Recursing?"; %cfg2<r>}> /; | 14:57 | |
| nommef | @lucs yes, it is recursing (endless spam) | 15:30 | |
| unfortunately I have no idea how to format code on irc (I prefer to use discord as little as possible) | 15:33 | ||
| lucs | nommef: If you use github, you can do a gist? | 15:35 | |
| nommef | here's the original code - privatebin.net/?3cf90d0e11e77e4b#D...eib3QJ4BfM | ||
| lucs | (same idea, eh) | 15:36 | |
| nommef | so, the regex is using a reference to a string (field?) inside that hash, instead of using the string itself in regex construction? maybe another case of cursed sigils? -_- (i am not a perl dev, it wouldnt be a first time me having such problem) | 15:43 | |
| lucs | For what it's worth, sigils in Raku are more well-behaved than in Perl. | 16:00 | |
| I can't quite figure it out, but the problem seems to be more with the multiple levels of indirections and evaluations. | |||
| Here's the same code, golfed down somewhat: gist.github.com/lucs/bb2613fa3b279...f35f4f7f89 | 16:01 | ||
| Maybe someone more expert can explain what's going on. | |||
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| lucs | moritz: Hi. | 16:05 | |
| moritz | Hi nommef, I was told that you have a problem with a hanging regex | ||
| lucs | gist.github.com/lucs/bb2613fa3b279...f35f4f7f89 | ||
| That's nommef's code, golfed down a bit. | |||
| moritz | The regex you're building and storing in %h2<s> tries, at runtime, to look up a value from %h2<s> | 16:06 | |
| so it finds itself, calls itself, and what does it do? it looks up a value from %h2<s> | |||
| this is basically the same as writing my $s = sub { $s() }; say $s(); | |||
| just written with regexes | |||
| Nemokosch | so it all boils down to <{%cfg2<r>}> being lazy? | 16:10 | |
| lucs | (aka <{%h2<s>}> in the golfed down version.) | 16:13 | |
| moritz | yes, a regex is really more like code, not like a string, and code always lazily looks up variables | ||
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