one-more-re-nightmare
hy
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one-more-re-nightmare | hy | |
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11 | 52 | |
133 | 4,775 | |
0.8% | 1.0% | |
4.2 | 9.2 | |
9 months ago | about 3 hours ago | |
Common Lisp | Python | |
BSD 2-clause "Simplified" License | GNU General Public License v3.0 or later |
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one-more-re-nightmare
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Regular Expressions make me feel like a powerful wizard- that's not a good thing
Depends on your regex engine, and your non-regex solution. My engine (shameless self-plug https://github.com/telekons/one-more-re-nightmare) rivals hand-written automata, having to load each character more-or-less* only once, and throws in vectorisation for simple search loops too. I would not want to write or maintain the generated code.
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Don't be lazy this month!
one-more-re-nightmare used to let you write Σ, but I then tried to search Greek stuff with it and it went wrong. So now there's...$ for all characters (since that's not used for end-of-line assertions).
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When a young programmer who has been using C for several years is convinced that C is the best possible programming language and that people who don't prefer it just haven't use it enough, what is the best argument for Lisp vs C, given that they're already convinced in favor of C?
One trick is that Common Lisp can generate and compile code at runtime, whereas static languages typically do not have a compiler available at runtime. This lets you make your own lazy person's JIT/staged compiler, which is useful if some part of the problem is not known at compile-time. Such an approach has been used at least for array munging, type munging and regular expression munging.
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Tutorial Series to learn Common Lisp quickly
> One of my favorite examples is the regex library cl-ppcre. Thanks to the nature of Lisp, the recognizer for each regex you create can be compiled to native code on compiler implementations of CL.
That is not true - cl-ppcre generates a chain of closures. Experimental performance is in the same ballpark as typical "bytecode" interpreting regex implementations.
(Disclosure: I wrote another regex library at <https://github.com/telekons/one-more-re-nightmare>, which does do native code compilation.)
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The self-hosted Zig compiler can now successfully compile itself
Someone else didn't tell me that before, so it can't be true. But I don't publish papers on toys, nor do I think toy projects are awfully fast. Though the x86-64 backend I wrote was in someone else's repository and thus was several PRs :(
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Most interesting languages to learn (from)?
Regular expressions
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Is regex really fast in CL?
Also try this https://github.com/telekons/one-more-re-nightmare
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Why You Should Learn Lisp In 2022?
A Common Lisp system has the compiler around at runtime, so if you can figure out how to profitably stage/specialise a computation, then you can roll your own cheap JIT of sorts. This can be useful for array munging and regular expressions at the least. You can do this in C, of course but you would need to use another compiler as a library (e.g. LLVM, TCC, libgccjit) or write your own (e.g. PCRE2's sljit).
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LISP with GC in 436 bytes
Agree to disagree - I don't have the energy to remember operator precedence. One file from the regular expression compiler has most of the rewrite rules I read from the papers, except in S-expression syntax. There were a few bugs due to misreading precedence. Also c.f. Gerald Sussman talking about physics notation being a pain in the butt.
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The one-more-re-nightmare regular expression compiler
It's all part of the library. Everything about regular expression types is in this file.
hy
- A dialect of Lisp that's embedded in Python
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How to Write a (Lisp) Interpreter (In Python)
Not exactly the same (doesn't embed into the source like this did), but I believe Hylang[0] is the best Lisp package available for modern Python.
[0] https://github.com/hylang/hy
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Sapling: A highly experimental vi-inspired editor where you edit code, not text
Isn't that a bit what hy (https://hylang.org/) tries to do ? AIUI it is a lisp interacting directly with the AST of Python, allowing seamless interop: Python modules can be used from hy and vice versa, everything is transparent.
- Hylang, a Lisp dialect embedded in Python
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Hissp
I’ve been keeping loose tabs on this and Hy[1] for a while, but I’ve had some trouble figuring out the major differences between them and the use-cases for either. Would love to see an in-depth comparison in the form of a blog post sometime (though maybe the answer here is to do the research and write one up myself).
1: https://hylang.org
- Hy
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Ask HN: Is SICP/HtDP still worth reading in 2023? Any alternatives?
“Python is for scientists. Lisp is for engineers.”
Then what does that make Hy language?
https://hylang.org/
Re Languages with lots of example code and LLM’s
With translators or things like Hy lang, one could get the LLM’s to solve your problem in Python before converting it to another form. Then, you just need a translator. If lacking one, it’s easy to translate by hand.
The practicality of this concept will probably vary by use case. My experiments had GPT doing sketching, implementations, boilerplate, and even porting Python to Rust. A legally-clear LLM trained on multiple languages could probably be fine-tuned to do Python to LISP conversions. If not, Hy might be a stepping stone, too.
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Sharing Saturday #469
You could say so: I've been maintaining the compiler since 2016 ;). Infinitesimal Quest 2 + ε (SQ) exists more to advance Hy than for its own sake.
- What if: python without commas
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Best implementation of CL for learning purposes
If you are using Python - you might find Hylang (https://hylang.org) interesting.
What are some alternatives?
Revise.jl - Automatically update function definitions in a running Julia session
hissp - It's Python with a Lissp.
SICL - A fresh implementation of Common Lisp
Fennel - Lua Lisp Language
zig - General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
babashka - Native, fast starting Clojure interpreter for scripting
cl-ppcre - Common Lisp regular expression library
eso-light-attack-weave - This is a macro for the game Elder Scrolls Online
oakc - A portable programming language with a compact intermediate representation
Carp - A statically typed lisp, without a GC, for real-time applications.
Petalisp - Elegant High Performance Computing
hebigo - 蛇語(HEH-bee-go): An indentation-based skin for Hissp.