If you ever wondered how to write a programming language, this is probably the best resource to get started (and then of course Crafting Interpreters).

See also part 2 https://norvig.com/lispy2.html

(how-to in-python (write (interpreter lisp)))

Yes, but to be fair, you only have a couple minutes to fight the HN title regex.

Writing a Lisp is one of my favorite projects. I try to do it every year or two, taking a different approach each time.

The one where you replaced parentheses with the crying laughing emojis was definitely the worst.

or you could just use Raku and its “surprisingly good lisp impression”:

https://www.codesections.com/blog/raku-lisp-impression/

I can't recommend highly enough to implement a simple lisp (or a forth).

Illuminating experience and it will also help you see (among many other things) the parentheses in a different light.

First day of paradigms course in the 2000s and prof says "if your opinion of Scheme is too many parentheses, then you're an idiot."

Needless to say that was my opinion and every day I think, more and more, how right he was.

(later I did make some gui apps that included scripting and chose s-expr syntax because of how simple it is to implement it)

There are two problems with Lisp parentheses in my opinion:

1) Humans are not that equipped to handle that level of nesting without some other aid, this is why Lisp code is usually indented.

2) Parentheses aren't just about grouping, and this is unintuitive. For example, x is not the same as (x). This is a bit like in set theory where x is not the same as {x}, but parentheses do not look like the kind of sign that would work like that.

main problem isn't brackets themselves - it's that they're too on the right

had brackets been displayed as curly braces in C - everything would look much more manageable

so, instead of

    (foo (bar (1 2 3))

you'd prefer

    {
      foo {
        bar {
          1
          2
          3
        }
      }
    }

is that right?

Emacs vs vim, go!

I changed my opinion about parens when I stopped formatting like C, and used indent rather than parens to denote blocks. That is, a large amount of them at the end is totally fine.

Why would AI make these age worse than, say, libraries or languages becoming obsolete?

I don't think a good learning resource gets worse just because there's a newer alternative.

> I don’t think a good learning resource gets worse[...]

Probably not, but they become irrelevant. The other day I found an old programming book at my parents’ and while it was still a terrific resource, I couldn’t image anyone learning a language from a book nowadays.

AI is doing the same thing but 100 times effectively than anything else.

How do you mean “these kind”?

Blog tutorials, guides, programming books and youtube tutorials. They are completely irrelevant in a time where you have a personal tutor willing to explain every single detail of a subject.

How so?

Appreciated the title xD

There are edge cases where this fails, but `def parse(s): return json.loads('['+re.sub('([")])\s*(["(])','\g<1>,\g<2>',re.sub('[^()\s]+','"\g<0>"',s)).replace('(','[').replace(')',']')+']')` is a surprisingly robust lisp parser.

(2010)?

One of those exercises that are now just boring, because AI does it better.

Gemini did write Lisp-1 interpreter in Linux-assembly the other day. It was ready to implement garbage collection and compiler and all shit, but that was just depressing from human point of view.

There is always someone better than you at almost everything you do, this is statistical reality.

If all you care about is the artifact and not the path, there is no reason to do anything.

Use the tool to better yourself, your understanding and push the limits of what is possible. If a Lisp in assembly with GC is now hello world, change what a hard project is.

I see this attitude a lot, and I think it is rooted in a sort of self-centered elitism. Anyone can do it, so why do it? Instead you could have the AI teach you how to implement it yourself with a deep understanding that no human, even if you paid them, would put up with.

But sure, get depressed. But why tho?

It's funny, in the 8-bit days a lot of us learned programming for its own sake without much expectation it'd be lucrative. Took ~50 years to get back to that spirit as the default.

is learning how to accomplish or understand something boring

just because someone or something else does it better?

It depends why you're doing it. Are you doing it for the product or the process? (Of course, they're not mutually exclusive.) I do it for the fun of building, in which case AI is irrelevant.

I mean it’s still worth doing, even if AI can do it. But I definitely empathize with that bit of AI ennui.