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Cake day: May 31st, 2020

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  • Ephera@lemmy.mltolinuxmemes@lemmy.worldit's just the worst
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    12 hours ago

    I’m guessing, you mean this then: https://github.com/edc/bass

    But well, I was rather thinking of when it’s using Bash-scripting-syntax to combine multiple commands.
    Like, maybe there’s a for-loop in there. You just can’t paste that directly into Fish and have it work. Granted, you should probably put that into a script file, even if you’re using Bash, but yeah, just temporarily launching bash is also an option.




  • Ephera@lemmy.mltolinuxmemes@lemmy.worldit's just the worst
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    12 hours ago

    To me, it genuinely makes a huge difference that I don’t have to manually press Ctrl+R for history search. Because 9 times out of 10, I accept a history suggestion from Fish where I did not think about whether it would be in my history.

    This includes really mundane commands, like cd some/deeply/nested/path/. You would not believe, how often I want to cd into the same directory.
    But I’ve also had it where I started typing a complicated docker run command and Fish suggests the exact command I want to write, because apparently I already ran that exact command months ago and simply forgot.


  • Yeah, my current software project at work was basically half a year of feature development and since then, we’ve purely tried to get it into the real world, which meant evaluating use-cases to see where it falls flat and what needs stabilizing, as well as figuring out people’s needs and how our software can assist with that, then setting up a demo and hoping they find money somewhere…


  • Where I typically notice it, is that the text starts repeating a few handful of points.

    The prompt will have been to write a story on those points, and because it doesn’t have much else to go off of, it will just shoehorn those exact points again and again.

    I expect this to always be a telltale sign, because if your point can be made in the length of the prompt, there’s a rather limited amount of noise it can add to that before it would have to go off-script.


  • My problem was that “Albert Heijn” is a dude’s name. It does not exactly scream “we’re talking about a real physical building”.

    For all I knew, the impossible problem we’re solving could’ve been on a mathematical plane, named after mathematician Albert Heijn. “Sweeping” just as well can be used in an abstract sense.

    Obviously, I did think of physically sweeping a physical floor first and foremost, but especially with the rest of the blog post being so entirely abstract, I had doubts on that for far too long, which did not make it easier to understand.











  • In many cases, you don’t need an equivalent to finally, because the cleanup is automatically handled via the Drop trait, which runs cleanup code when the object is freed from memory (similar to “destructors” in some other languages).
    Because of Rust’s whole ownership thingamabob, it’s generally entirely deterministic when this code will run (at the closing brace for the scope in which the object is defined, unless you pass that object outside of that scope).

    In other cases, you don’t need a finally, because nothing forces you to bubble up errors instantly. You can make a call which fails, store the error in a variable, run your cleanup steps and then return the error at the end of you function.

    Sometimes, however, you do want to bubble up errors right away (via ? or early return), typically so you can group them together and handle them all the same.
    In that case, you can run the cleanup code in the calling function. If you don’t to want to make it the responsibility of the caller, then pull out a small function within your function, so that you become the caller of that small function and can do the cleanup steps at the end of your function, while you do the bubbling within the smaller function.
    There’s also ways to make that less invasive via closures (which also serve as a boundary to which you can bubble errors), but those are somewhat complex in Rust, due to the whole ownership thingamabob.

    I will say, I do sometimes feel like Rust could use a better way to handle doing something before the error bubbles up. But generally speaking, I don’t feel like a finally is missing.


  • You can use the anyhow crate for something quite similar to exceptions: https://crates.io/crates/anyhow

    In terms of how it actually fits into Rust, you want to use anyhow for application code. If you’re writing a library, then anyhow is a no-go, because users cannot match on different error classes with it. (Much like you would want custom exception classes, so that users can catch them in different catch branches and handle them differently.)

    Every so often, you will also need matchable error classes within your application code, then you would have to replace anyhow with a custom error type there, too, of course.

    I will also say, IMHO it is fine to use anyhow even while you’re learning Rust. It is so easy that you kind of skip learning error handling, which you will need to learn at some point, but you can still do that when you actually need it.