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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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| thundergnat | regarding anonymous state variables; some instances where I found them useful - rosettacode.org/wiki/P-value_correction#Raku rosettacode.org/wiki/Boustrophedon...sform#Raku (and perhaps my favorite) rosettacode.org/wiki/Egyptian_divi...22_version | 00:33 | |
| Yes, I am responsible for all of those. And yes, they could be regarded as horrible hacks, but /I/ like them. | 00:34 | ||
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| el gatito (** advocate) | m:perl loop (my $i = 0; $i < 10; $i++) {} say $i | 03:11 | |
| Raku eval | 10 | ||
| el gatito (** advocate) | why | 03:12 | |
| why it leak out of the scope | |||
| guifa | good question. That is probably a bug. I don't think it should be | 04:12 | |
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| Nemokosch | I'm not sure this is a bug. In the case of if, this is definitely known and acknowledged behavior, with the advice of using pointy block syntax instead | 10:19 | |
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| lizmat | it leaks out of scope because that's how it was intended and implemented | 10:43 | |
| there are far better solutions, such as: for ^10 { ... } | 10:44 | ||
| or if you you need both the value *and* the index | |||
| Nemokosch | fun fact: it also "leaks out" in Python | 10:45 | |
| lizmat | as it does in C | ||
| Nemokosch | hm, are you sure about that? | ||
| lizmat | m: my @a = <a b c d e f g>; for @a.kv -> $letter, $index { say "'$letter' is at index $index" } | ||
| camelia | '0' is at index a '1' is at index b '2' is at index c '3' is at index d '4' is at index e '5' is at index f '6' is at index g |
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| lizmat | m: my @a = <a b c d e f g>; for @a.kv -> $index, $letter { say "'$letter' is at index $index" } # duh :-) | 10:46 | |
| camelia | 'a' is at index 0 'b' is at index 1 'c' is at index 2 'd' is at index 3 'e' is at index 4 'f' is at index 5 'g' is at index 6 |
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| Nemokosch | anyway, here I'd agree that the magic behavior would be to declare a variable out of the block and tie it to the block | ||
| what annoys me more, Raku aside, is that I can't use inner variables in do-while loop conditions | |||
| which makes sense from scope hierarchy point of view but logic-wise, it often makes sense that the condition relies on something internal to the loop body | 10:52 | ||
| anyway, in C and related languages, the head of control structures does unify with the inner scope, meaning that "say $i" would indeed break | 10:56 | ||
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| deoac | Given `my regex consonants { <[mrnljzsdtfvbpkcgq]>|sh|th|ch|ph };` How would I match all non-<consonants>? | 22:57 | |
| Nemokosch | iirc there is no built-in negation for regex, only character groups | 23:00 | |
| new-raku.finanalyst.org/language/r...tion_check | 23:03 | ||
| rf | Hmm, i'm sure there's a way to negate a regex | 23:08 | |
| m: my regex consonants { <[mrnljzsdtfvbpkcgq]>|sh|th|ch|ph }; 'abcdefg'.match(/[<consonants>-]/).say; | 23:09 | ||
| camelia | ===SORRY!=== Error while compiling <tmp> Unrecognized regex metacharacter - (must be quoted to match literally) at <tmp>:1 ------> |ch|ph }; 'abcdefg'.match(/[<consonants>⏏-]/).say; expecting any of: argument list… |
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| Nemokosch | well, last time I asked, there wasn't a way, from what I can recall | 23:10 | |
| m: say 'i' ~~ / . <!{&consonants}> / | 23:11 | ||
| Raku eval | Exit code: 1 ===SORRY!=== Error while compiling /home/glot/main.raku Undeclared routine: consonants used at line 1 | ||
| Nemokosch | oops | ||
| m: my regex consonants { <[mrnljzsdtfvbpkcgq]>|sh|th|ch|ph }; say 'i' ~~ / . <!{&consonants}> / | |||
| Raku eval | ｢i｣ | ||
| Nemokosch | might be worth playing with | ||
| bleh, this matches 'm' as well... I wonder what that "check" did, then | 23:12 | ||
| m: my regex consonants { <[mrnljzsdtfvbpkcgq]>|sh|th|ch|ph }; say 'i' ~~ / . <!{ $/ ~~ &consonants }> /; say 'l' ~~ / . <!{ $/ ~~ &consonants }> /; | 23:14 | ||
| Raku eval | ｢i｣ Nil | ||
| Nemokosch | looks kinda bizarre but seems to do something sensible | ||
| rf | Yeah that is an interesting application lol | ||
| Nemokosch | / . <!{ m/<consonants>/ }> / might look better, with essentially the same logic... | 23:15 | |
| hoping that the right argument is passed into the check block | 23:17 | ||