regex VS fd

The homepage has a benchmark that compares Zed's "insertion latency" to other editors, and this is the description:

> Open input.rs at the end of line 21 in rust-lang/regex. Type z 10 times, measure how long it takes for each z to display since hitting the z key.

Could someone clarify what that means? My interpretation of that was to go to https://github.com/rust-lang/regex/blob/master/regex-cli/arg... and start typing 'z' at the end of line 21, but that doesn't seem to make any sense. I guess that repo got refactored and those instructions are out of date?

We also used the avenue to sluggify the question title. We used regex to fish out and replace all occurrences of punctuation and symbol characters with an empty string and using the itertools crate, we joined the words back together into a single string, where each word is separated by a hyphen ("-").

Command-Line Rust taught me how to use crates like clap, assert_cmd, and regex. I felt lost before because I didn't know about Rust's ecosystem--which is arguably as important as the language itself. Also, looking up and comparing libraries is a tiring task! blessed.rs is nice but Command-Line Rust really saved me from analysis paralysis.

burntsushi actually regrets making regex replace return a Cow: https://github.com/rust-lang/regex/issues/676#issuecomment-6.... I’m glad it does, and wish it took an impl Into> there, for the reasons discussed in the issue, but burntsushi has a lot more experience of the practical outcomes of this. Just something more to think about.

I'm not familiar with the AoC problem. You might be able to. But RegexSet doesn't give you match offsets.

You can drop down to regex-automata, which does let you do multi-regex search and it will tell you which patterns match[1]. The docs have an example of a simple lexer[2]. But... that will only give you non-overlapping matches.

You can drop down to an even lower level of abstraction and get multi-pattern overlapping matches[3], but it's awkward. The comment there explains that I had initially tried to provide a higher level API for it, but was unsure of what the semantics should be. Getting the starting position in particular is a bit of a wrinkle.

[1]: https://docs.rs/regex-automata/latest/regex_automata/meta/in...

[2]: https://docs.rs/regex-automata/latest/regex_automata/meta/st...

[3]: https://github.com/rust-lang/regex/blob/837fd85e79fac2a4ea64...

It’s not quite that simple, but folks are working on it.

https://github.com/rust-lang/regex/issues/425#issuecomment-1...

https://github.com/helix-editor/helix/pull/211#issuecomment-...

Dependencies used: - regex - unicode_reader - rust decimal - tokio

https://www.cs.princeton.edu/courses/archive/fall19/cos226/l... and https://kean.blog/post/lets-build-regex are excellent introductions to implementing a (very) simplified regex engine: construct a nondetermistic finite state automaton for the regex, then perform a graph search on the resulting digraph; if the vertex corresponding to your end state is reachable, you have a match.

I think this exercise is valuable for anyone writing regexes to not only understand that there's less magic than one might think, but also to visualize a bunch of balls bouncing along an NFA - that bug you inevitably hit in production due to catastrophic backtracking now takes on a physical meaning!

Separately re: the OP, https://github.com/rust-lang/regex/issues/822 (and specifically BurntSushi's comment at the very end of the issue) adds really useful context to the paragraph in the OP about niche APIs: https://blog.burntsushi.net/regex-internals/#problem-request... - searching with multiple regexes simultaneously against a text is both incredibly complex and incredibly useful, and I can't wait to see what the community comes up with for this pattern!

ripgrep: A super-fast file searcher. You can install it using your system's package manager (e.g., brew install ripgrep on macOS). fd: Another blazing-fast file finder. Installation instructions can be found here: https://github.com/sharkdp/fd

hyperfine is such a great tool that it's one of the first I reach for when doing any sort of benchmarking.

I encourage anyone who's tried hyperfine and enjoyed it to also look at sharkdp's other utilities, they're all amazing in their own right with fd[1] being the one that perhaps get the most daily use for me and has totally replaced my use of find(1).

[1]: https://github.com/sharkdp/fd

You call it with `n` and get an interactive fuzzy search for your directories. If you do `n ` instead, it’ll start the find with `` already filled in (and if there’s only one match, jump to it directly). The `ls` is optional but I find that I like having the contents visible as soon as I change a directory.

I’m also including iCloud Drive but excluding the Library directory as that is too noisy. I have a separate `nl` function which searches just inside `~/Library` for when I need it, as well as other specialised `n` functions that search inside specific places that I need a lot.

¹ https://github.com/sharkdp/fd

² https://github.com/junegunn/fzf

Many (most?) of them have been overhauled with success. For find there is fd[1]. There's batcat, exa (ls), ripgrep, fzf, atuin (history), delta (diff) and many more.

Most are both backwards compatible and fresh and friendly. Your hardwon muscle memory still of good use. But there's sane flags and defaults too. It's faster, more colorful (if you wish), better integration with another (e.g. exa/eza or aware of git modifications). And, in my case, often features I never knew I needed (atuin sync!, ripgrep using gitignore).

1 https://github.com/sharkdp/fd

Descubra mais sobre o fd em: https://github.com/sharkdp/fd

AFAIK there is a find replacement with sane defaults: https://github.com/sharkdp/fd , a lot of people I know love it.

However, I already have this in my muscle memory:

fd

> without zsh globs I have to remember find syntax

My "solution" to this is using https://github.com/sharkdp/fd (even when in zsh and having glob support). I'm not sure if using a tool that's not present by default would be suitable for your use cases, but if you're considering alternate shells, I suspect you might be

Nice to see other alternatives to find. I personally use fd (https://github.com/sharkdp/fd) a lot, as I find the UX much better. There is one thing that I think could be better, around the difference between "wanting to list all files that follow a certain pattern" and "wanting to find one or a few specific files". Technically, those are the same, but an issue I'll often run into is wanting to search something in dotfiles (for example the Go tools), use the unrestricted mode, and it'll find the few files I'm looking for, alongside hundreds of files coming from some cache/backup directory somewhere. This happens even more with rg, as it'll look through the files contents.

I'm not sure if this is me not using the tool how I should, me not using Linux how I should, me using the wrong tool for this job, something missing from the tool or something else entirely. I wonder if other people have this similar "double usage issue", and I'm interested in ways to avoid it.