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Joined 3 years ago
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Cake day: June 11th, 2023

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  • Sure, but many languages do that,

    I wrote several paragraphs and talked about three languages, so I’m going to have to guess about what “that” refers to. I’m guessing it’s Lisp macros. Your other comment offers template metaprogramming in C++ as an alternative.

    Template metaprogramming Gets maybe a third of the way to what Lisp macros offer. It can do compile-time syntax transformations, but it doesn’t provide the full C++ language with which to do so, doesn’t operate on the actual parse tree, and isn’t Turing-complete in practice because of fixed limits on recursion depth in real compilers. Rust macros get much closer, providing the full power of Rust and the option to get at a real AST by parsing the token stream they operate on.

    If you mean something else, please elaborate. It’s an interesting topic.

    There are more modern and better ways, IMO.

    I’m not sure what “more modern” means in this context. If it just means young, I can probably find a Lisp family language with its first release this year, though that wouldn’t be the one I would recommend to a beginner. If it means recently-updated, Racket, the Lisp I recommended learning had its latest stable release nine days ago. If it means something else, please say so.

    “Better” probably can’t be measured objectively, but by all means, make the case for something else.


  • Some people want to learn programming to get a job, though perhaps not as many in 2026. Some people want to do a project that happens to requiring programming. Some actually want to understand programming and get good at it. The last group will benefit from learning Lisp and Haskell even if they don’t end up using those languages much. I thought my first comment explained why and I think Corngood elaborated on it, but I’ll add more.

    The reason to use programming languages instead of machine/assembly languages is that they add abstractions, and allow the programmer to add more abstractions. An abstraction is a name and implementation for a repeated pattern in code, which documents the programmer’s intent when it is used, allows all invocations to be modified in one place, and substantially shortens programs. In most languages, there’s a distinction between abstractions the language designer can add and those the programmer can; in Lisp, there is not.

    If most languages didn’t have if or class, you couldn’t add them in a library; you’d have to modify the interpreter or compiler. Here’s if defined in a Lisp-like language I’m working on:

    (defmacro if (test then else)
      `(cond ~test ~then true ~else))
    

    This is possible because Lisp code is made of Lisp data structures which it can easily manipulate, and because it has the ability to control when evaluation occurs. Here, we need to splice three blocks of code into a cond expression, which is a more generalized form of conditional evaluation that takes an unlimited number of test/then pairs. We must also prevent the premature evaluation of the branch not chosen, which is why if and cond can’t be regular functions. In Common Lisp, the entire object system can be implemented as a library.

    Haskell and similar languages also offer significant power for abstraction with its sophisticated type system and lazy evaluation, but the more important lesson they can teach is the gurantees they can make at compile time. Once a Haskell program compiles, it has a much greater chance to work as expected than any other language I’ve used.

    SQL teaches thinking in data. Most programs exist to store and manipulate data, so that’s pretty relevant.




  • I question the suggestion that Zig and Go are not “serious” programming languages. They certainly weren’t designed to be “easy” beginner languages.

    I don’t think it matters a whole lot which language you start with. Learning to program is largely separate from learning a particular language, and if you do programming for a while, you’ll probably learn several. I do think someone who wants to understand programming deeply should learn each of:

    • A lisp, probably Racket, but others will do. This teaches a lot about how computation works, and is at least a local maximum for abstractive power.
    • C, an assembly language, or something similar where the developer must manage memory manually and has the ability to mismanage it. This teaches how computers work.
    • A statically typed functional language, probably Haskell. This makes programming more math-like and probably represents a local maximum for what can be proven about a program’s behavior without solving the halting problem.
    • SQL. I wish there was something prettier with a modicum of popularity that does what it does (PRQL is my favorite recent attempt), but there isn’t. This teaches thinking about data in sets and relations, and you will almost certainly use it in practice.

  • Given that new cars are very expensive, and you don’t want new-car features, you might be better off putting significant money into maintaining your old car.

    People usually only do that with collectable cars they expect to increase in value or enthusiast cars they drive for fun, but you can spend quite a bit on maintenance before it’s as expensive as new-car depreciation.



  • Yeah, I talked about how assets are different than things we need, like health…

    The original comment references luxury assets like supercars. In the USA, the average adult needs a car of some sort to function in society, and often cannot afford the unplanned purchase of a reliable used car (let’s call that $15K). Collision insurance that will cover most of the cost of a replacement car is a reasonable value for many people, and the insurance company doesn’t have any special leverage like access to massive discounts on replacement cars (they may have access to modest discounts on repair services, but nothing like what health insurance has).

    You just don’t understand it

    I think I made it pretty clear I understand that for-profit health insurance is a scam because providers overcharge anyone who doesn’t have it to an extreme degree. That’s not the case for pretty much anything else.






  • Using it as a laptop? In theory, a 10" screen thin and light laptop with the guts in the base instead of the screen is a better design. There aren’t very many of those to be had, especially not for $90 on Ebay.

    Watching videos during taxi, takeoff, and landing? The alternative is paying attention to the safety briefing. I think I won’t.