Блог*
#prog #моё Если вы используете регулярные выражения — вам должно быть за это стыдно У регулярных выражений есть куча недостатков, и, на мой взгляд, их слишком часто используют там, где не надо. Сейчас я расскажу о том, что же с ними не так. Проблемы 1.…
#prog #regex #article
The true power of regular expressions
<...>
As the article was quite long, here a summary of the main points:
* The “regular expressions” used by programmers have very little in common with the original notion of regularity in the context of formal language theory.
* Regular expressions (at least PCRE) can match all context-free languages. As such they can also match well-formed HTML and pretty much all other programming languages.
* Regular expressions can match at least some context-sensitive languages.
* Matching of regular expressions is NP-complete. As such you can solve any other NP problem using regular expressions.
But don’t forget: Just because you can, doesn’t mean that you should. Processing HTML with regular expressions is a really bad idea in some cases. In other cases it’s probably the best thing to do.
The true power of regular expressions
<...>
As the article was quite long, here a summary of the main points:
* The “regular expressions” used by programmers have very little in common with the original notion of regularity in the context of formal language theory.
* Regular expressions (at least PCRE) can match all context-free languages. As such they can also match well-formed HTML and pretty much all other programming languages.
* Regular expressions can match at least some context-sensitive languages.
* Matching of regular expressions is NP-complete. As such you can solve any other NP problem using regular expressions.
But don’t forget: Just because you can, doesn’t mean that you should. Processing HTML with regular expressions is a really bad idea in some cases. In other cases it’s probably the best thing to do.
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Никто:
Антон: забывает, что ему теперь переводят зарплату на карту другого банка
Антон: забывает, что ему теперь переводят зарплату на карту другого банка
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#rust
Хорошее дополнение к документации макроса
github.com/rust-lang/rust/pull/106453
Хорошее дополнение к документации макроса
include!. Это не замена модулям.github.com/rust-lang/rust/pull/106453
GitHub
Improve include macro documentation by coastalwhite · Pull Request #106453 · rust-lang/rust
As outlined in #106118, the include! macro is a SEO problem when it comes to the Rust documentation. Beginners may see it as a replacement to include syntax in other languages. I feel like this doc...
#prog #rust
Esteban Kuber продолжает улучшать диагностики парсера rustc. Теперь парсер ещё и восстанавливается от маркеров конфликта слияния.
github.com/rust-lang/rust/pull/106242
Esteban Kuber продолжает улучшать диагностики парсера rustc. Теперь парсер ещё и восстанавливается от маркеров конфликта слияния.
github.com/rust-lang/rust/pull/106242
GitHub
Detect diff markers in the parser by estebank · Pull Request #106242 · rust-lang/rust
Partly address #32059.
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#prog #rust
Я просто оставлю это здесь (btw это Вафель сделал)
github.com/rust-lang/rust-analyzer/pull/13857
Я просто оставлю это здесь (btw это Вафель сделал)
github.com/rust-lang/rust-analyzer/pull/13857
GitHub
feat: Implement yeeting by WaffleLapkin · Pull Request #13857 · rust-lang/rust-analyzer
See tracking issue: rust-lang/rust#96373
Before:
After:
Before:
After:
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