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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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| msiism | I used ` lines(IO('wordlist'))` to get a Seq of lines from a file. And, surprisingly, that worked just fine. So, is `IO` also just a routine, after all? | 20:04 | |
| I'm a bit confused because other languages I've tried would require me to import some IO module first. Then I'd have `stdio::lines` or some such available, which I could alias to `lines`. | 20:07 | ||
| So, using, e.g., `stdio` itself like a routine would not make any sense. | 20:08 | ||
| disbot4 | <nahita3882> you are technically performing a coercion: web.archive.org/web/20221216070143...m#Coercion | 20:18 | |
| <nahita3882> m: class A { has $.val; }; say A(12) | |||
| <Raku eval> Exit code: 1 Impossible coercion from 'Int' into 'A': no acceptable coercion method found in block <unit> at main.raku line 1 | |||
| <nahita3882> m: class A { has $.val; method COERCE($n) { self.new: :val($n × 2) } }; say A(12) | |||
| <Raku eval> A.new(val => 24) | 20:19 | ||
| <nahita3882> the special method in charge is COERCE | |||
| <nahita3882> re lack of need for importing stuff: as far as I know, Raku has everything built-in | 20:20 | ||
| <nahita3882> you don't import anything to use anything language offers | |||
| <nahita3882> e.g., even the Test module is not technically part of the language, so it doesn't count (to need for use'ing things) | 20:22 | ||
| <shalokshalom> When you distribute (compile-time evaluated) multiple dispatch, and a third party later wants to add an additional overload in their own code without modifying or recompiling your library, compile-time multiple dispatch cannot support this; only a runtime registry can? | 20:23 | ||
| <shalokshalom> And Rakus multiple dispatch is implemented via type reflection, and not runtime evaluation, yes? | |||
| msiism | Hm… okay, I get what type coercion is, but it stops there, unfortunately. | 20:27 | |
| The reason probably is that I don't understand, what a class in Raku is. | 20:28 | ||
| lizmat | the most common way to read lines out of a file is: | 20:52 | |
| for "filename".IO.lines { .say } | |||
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| disbot4 | <librasteve> @shalokshalom most of raku is runtime oriented … i’m pretty sure you can layer on multis to pre compiled modules | 21:58 | |
| <shalokshalom> I am a bit confused over this. Isnt multiple dispatch in Raku implemented via type reflection, at compile time? | |||
| <librasteve> oh … my superficial check is that you are right … sorry | 22:02 | ||
| <librasteve> i guess mainly with “zef install” and “use” your are recompiling | 22:04 | ||
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| disbot4 | <shalokshalom> yeah, but is that enough? | 22:33 | |
| <shalokshalom> like, simply recompiling the original source, and you are done? | |||
| <shalokshalom> with no changes on the source code? | |||
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