• 8 Posts
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Joined 6 years ago
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Cake day: May 31st, 2020

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  • Huh, so if you don’t opt for these more specific number types, then your program will explode sooner or later, depending on the architecture it’s being run on…?

    I guess, times were different back when C got created, with register size still much more in flux. But yeah, from today’s perspective, that seems terrifying. 😅


  • What really frustrates me about that, is that someone put in a lot of effort to be able to write these things out using proper words, but it still isn’t really more readable.

    Like, sure, unsigned is very obvious. But short, int, long and long long don’t really tell you anything except “this can fit more or less data”. That same concept can be expressed with a growing number, i.e. i16, i32 and i64.

    And when someone actually needs to know how much data fits into each type, well, then the latter approach is just better, because it tells you right on the tin.



  • Ephera@lemmy.mltoScience Memes@mander.xyzit's a long distance relationship
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    5 days ago

    I’m open for counterarguments, but I always felt this was a silly way of looking at things. You cannot measure stuff at the quantum level without significantly altering what you measured. (You can never measure without altering what you measured, since we typically blast stuff with photons from a light source to be able to look at it, but for stuff that’s significantly larger than photons, the photons are rather insignificant.)

    As such, you can look at measuring quanta in two ways:

    1. Either the quantum had the state that you end up measuring all along. It is only “undetermined”, because strictly nothing can measure it before you do that first measurement.
    2. Or you can declare it to have some magical “superposition”, from which it jumps into an actual state in the instant that you do the measurement.

    Well, and isn’t quantum entanglement evidence for 1.? You entangle these quanta, then you measure one of them. At this point, you already know what the other one will give as a result for its measurement, even though you have not measured/altered it yet.
    You can do the measurement quite a bit later and still get the result that you deduced from measuring the entangled quantum. (So long as nothing else altered the property you want to measure, of course…)


  • Ephera@lemmy.mltoScience Memes@mander.xyzit's a long distance relationship
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    5 days ago

    The analogy that makes most sense to me so far, is this:
    You rip a photograph in half and put both halves into envelopes. Now you send one of the envelopes to your friend in Australia. You open the other envelope. Boom! Instantaneous knowledge of what’s in the envelope in Australia. Faster than light!!!

    In quantum terms, you “rip a photograph in half” by somehow producing two quanta, which are known to have correlated properties. For example, you can produce two quanta, where one has a positive spin and the other a negative spin, and you know those to be equally strong. If you now measure the spin of the first quantum, you know that the other has the opposite spin.








  • Yeah, and you don’t have to know which fork to choose. Only the compatible fork will show up in the search.

    (I was going to recommend that, but had something in the back of head, that you needed a manual step to enable the configuration. But I just saw that this is described in the Plasma 5 version, not the Plasma 6 fork, so I guess, it’s not necessary anymore…)



  • Ephera@lemmy.mltoLinux@lemmy.mlCan KDE Tile Windows Like PopOS?
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    12 days ago

    I believe, that’s something which became impossible with Wayland?

    But it wasn’t very good under X11 either. Even back then, it was much less clunky to use the various KWin scripts, which offer tiling. Well, and by now Plasma has built-in semi-automatic tiling, which those scripts basically just configure, so they do now feel quite smooth.