primes-cpp
mal
primes-cpp | mal | |
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1 | 95 | |
0 | 9,822 | |
- | - | |
10.0 | 0.0 | |
over 7 years ago | about 2 months ago | |
C++ | Assembly | |
- | GNU General Public License v3.0 or later |
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primes-cpp
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Ask HN: What piece of code/codebase blew your mind when you saw it?
Everybody mentions this, and what's great is that it is a pretty natural solution to a lot of problems. I remember coming up with a version of it while writing an optimized prime-sieve[1], and was surprised when I later learned that it was some named technique.
In addition to just the basic loop-unrolling (which I'm pretty sure you usually don't need to do by hand with modern compilers), it works really well when you need to jump into the middle of a pattern. Like if you're sieving primes in a wheel-factorized array.
[1] https://github.com/patricksjackson/primes-cpp/blob/master/pr...
// Here we're only checking possible primes after wheel-factorization
mal
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Ask HN: Is Lisp Simple?
>Would be interesting to see how the interpreter works actually...
It's quite easy to see, there are interpeters for Lisp in like 20 lines or so.
Here's a good one:
https://norvig.com/lispy.html
(It has the full code in a link towards the bottom)
There's also this:
https://github.com/kanaka/mal
- GitHub - kanaka/mal: mal - Make a Lisp
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Build Your Own Lisp
Here is one implementation of a lisp (mal specifically) in matlab: https://github.com/kanaka/mal/blob/dcf8f4d7b9cf7b858850a04a0...
Only 260 lines of code, pretty concise :)
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Found inside my compiler I've been writing for about 2 years
have a look at the crafting interpreters book, plus make a lisp (lisp is a great first language to make a compiler/interpreter for, just google "lisp compiler/interpreter" and you'll find lots of resources)
- Ce proiecte for-fun ati facut in timpul facultatii ca sa invatati ceva nou si practic singuri?
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Crafting Interpreters or Writing an Interpreter in Go? Given context
If you're really okay with the limitations of a tree-walk interpreter, you might want to check out MAL, which will teach you how to write a tree-walk interpreter for a LISP. The code for MAL has been translated to most popular languages, so you can work through the creation of an interpreter in the language of your choice. JLox would give you a bit more detail and a more complex language, but I'm not convinced that it's all that important.
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What do I do now?
Write a small programming language (lisp (https://github.com/kanaka/mal) or brainfuck) in C++ to learn the syntax more. This will teach you a lot about programming languages in general.
- Ask HN: What projects did you build to get better as a programmer?
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Can you beat my dad at Scrabble?
So I started some hobbyist game dev using Unity and realised that the full process of making a game has dependencies on a mass of lower-level skills including lighting virtual environments. As a hobbyist photographer I could see some useful analogies from lighting studios and other scenes
So I pivoted, and eventually made money, not from selling a game, but from developing tutorials about digital lighting. I was also able to contribute to a project at work that was making a product based on commercial games engine, not by actually coding it, but by helping to better estimate the costs of the asset generation required.
Coding Unity object scripts in C# also got me back into programming, and I went on to successfully build a self-hosting lisp interpreter following the Make a Lisp guidelines [0].
[0] https://github.com/kanaka/mal/blob/master/process/guide.md
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Advice for a first-time designer of my own original programming language? Presently writing the interpreter!
Hijacking the top comment to add https://buildyourownlisp.com and https://github.com/kanaka/mal
What are some alternatives?
lisp-in-life - A Lisp interpreter implemented in Conway's Game of Life
paip-lisp - Lisp code for the textbook "Paradigms of Artificial Intelligence Programming"
scheme - An R7RS Scheme implemented in WebAssembly
Lua - Lua is a powerful, efficient, lightweight, embeddable scripting language. It supports procedural programming, object-oriented programming, functional programming, data-driven programming, and data description.
sectorlisp - Bootstrapping LISP in a Boot Sector
project-based-learning - Curated list of project-based tutorials
hy - A dialect of Lisp that's embedded in Python
wisp - A little Clojure-like LISP in JavaScript
adventofcode - Advent of Code solutions of 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 and 2023 in Scala
adventofcode - :christmas_tree: Advent of Code (2015-2023) in C#
project-based-tutorials-in-c - A curated list of project-based tutorials in C
rustface - Face detection library for the Rust programming language