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Joined 4 years ago
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Cake day: May 31st, 2020

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  • Yeah, that is my understanding, too. Otherwise you’d only want to generate them on the database host, as even with NTP there will be small differences. This would kind of defeat the purpose of UUIDs.

    If you’re saying that even without NTP, just by manually setting the time, things will be fine. I mean, maybe. But I’ve seen it far too many times already that some host shows up with 1970-01-01…


  • For others wondering what’s wrong with UUIDv4:

    UUID versions that are not time ordered, such as UUIDv4, have poor database-index locality. This means that new values created in succession are not close to each other in the index; thus, they require inserts to be performed at random locations. The resulting negative performance effects on the common structures used for this (B-tree and its variants) can be dramatic.

    I guess, this means with these new UUIDs, ideally you only create UUIDs on systems that are hooked up to NTP, though I guess, it won’t really be worse than UUIDv4 either way.






  • We’ve been using Leptos at work, which is a similar framework (and probably shares half the stack with Dioxus).

    And yeah, it’s really good. My favorite thing about using Rust for the UI is algebraic data types.
    So, in Rust when you call a function which can fail, there isn’t an exception being thrown, but rather you get a Result-type as return value.
    This Result can either contain an Ok with the actual return value inside. Or it can contain an Err with an error message inside.
    So, in your UI code, you just hand this Result all the way to your display code and there you either display the value or you display the error.

    No more uninitialized variables, no more separate booleans to indicate that the variable is uninitialized, no more unreadable multi-line ternaries.
    It just becomes so much simpler to load something from the backend and display it, which is kind of important in frontend code.











  • Ephera@lemmy.mltoScience Memes@mander.xyzPlugs
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    2 days ago

    Various ant species do a similar thing where their soldiers have really big, flat heads and when their nest gets attacked, the soldiers stick their head into the entrance way, so the attackers can’t come inside.

    Apparently, this kind of behaviour is referred to as phragmosis.




  • I guess, at the end of the day, life is just a whole load of chemical reactions. Oxygen is popular for life on Earth, because it’s available pretty much everywhere and because it releases energy when combined with carbon, which we’ve also got a lot of.

    Presumably, you could stick any two elements that have an exothermic reaction into a box, give them an energy source with enough activation energy (akin to Earth’s Sun), as well as a source of entropy and then, with enough time, life would find a way.