lisp-in-life
astexplorer
lisp-in-life | astexplorer | |
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6 | 43 | |
444 | 5,942 | |
- | - | |
1.8 | 6.0 | |
over 2 years ago | 6 days ago | |
C | JavaScript | |
GNU General Public License v3.0 or later | MIT License |
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lisp-in-life
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Discussion Thread
Still, my favorite has to be the LISP interpreter written in Conway's Game of Life written in LISP.
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Ask HN: What piece of code/codebase blew your mind when you saw it?
Almost forgot - Lisp In Life. Pretty sure I first saw that on HN. IMO the more amazing thing is the Life-based processor, once you have that, the rest is a matter of adding layers. But it's one thing to know someone could do it, quite another to see it in action.
https://github.com/woodrush/lisp-in-life
Run it in your browser here. Definitely worth zooming all the way in to get a sense of scale.
https://woodrush.github.io/lisp-in-life/
- A Lisp interpreter implemented in Conway's Game of Life
- A Lisp Interpreter Implemented in Conway's Game of Life
astexplorer
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Understanding Code Structure: A Beginner's Guide to Tree-sitter
You can play with your code here, and visualise ASTs for the same.
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What is an Abstract Syntax Tree in Programming?
Website
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How to create your own Eslint rule with tests, boosting the DX, and code-review
To understand this syntax, I recommend exploring AST Explorer. You will have a better view of how the AST of JavaScript works and how to correlate it with the Eslint syntaxy:
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Programming from Top to Bottom - Parsing
You can never mistake type_declaration with an identifier, otherwise the program will not work. Aside from that constraint, you are free to name them whatever you like, there is no one standard, and each parser has it own naming conventions, unless you are planning to use something like LLVM. If you are interested, you can see examples of naming in different language parsers in the AST Explorer.
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ESLint: under the hood
The rule that I want to write will be called not-allows-underscore: the idea is to abolish the use of underscores when declaring variables or functions. It's a real dummy rule, but it should be enough to see in action the concepts that we have discussed earlier. The first thing that I would do is to go to AST Explorer, write down a code that declares variables and functions (both standard and arrows one) and take a look at what type of node is the one that encodes the identifier. Doing that, I found out that the node type of my interest is Identifier, what a surprise! 🤣. In particular, the structure of the node holds the string used as identifier in the name property.
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😱 ESlint over Conventions - You have Not unlocked the power of ESlint 😱
All the information about the API, AST node names, AST Explorer, etc. you can read in the official documentation. I’m just going to show examples of how to automate the check-up of our created conventions.
- AST Exploret
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200 Web-Based, Must-Try Web Design and Development Tools
AST Viewer
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Building a JSON Parser from scratch with JS 🤯
If you want to see how the AST of popular languages looks, I recommend the AST Explorer. It supports various languages, and you can view the complete AST and navigate through the nodes. If you want to go further, you can try to copy some logic from an existing parser and implement it in your own, such as calculating an expression according to precedence order, for example: 1 + 2 * 3 (which is 7, not 9).
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Creating my own typescript compiler
https://astexplorer.net/ is a good resource/playground for understanding ASTs and transpilers.
What are some alternatives?
ol - Otus Lisp (Ol in short) is a purely* functional dialect of Lisp.
deno_swc - The SWC compiler for Deno.
janet - A dynamic language and bytecode vm
gogocode - GoGoCode is a transformer for JavaScript/Typescript/HTML based on AST but providing a more intuitive API.
lispe - An implementation of a full fledged Lisp interpreter with Data Structure, Pattern Programming and High level Functions with Lazy Evaluation à la Haskell.
vscode-language-tree - VSCode tree format support
ulisp-bl602 - A version of the Lisp programming language for RISC-V BL602 Boards
ChakraCore - ChakraCore is an open source Javascript engine with a C API.
primes-cpp - A compact primes library containing a highly optimized prime sieve and deterministic primality test.
Acorn - A small, fast, JavaScript-based JavaScript parser
triplea - TripleA is a turn based strategy game and board game engine, similar to Axis & Allies or Risk.
proposal-type-annotations - ECMAScript proposal for type syntax that is erased - Stage 1