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Cake day: June 12th, 2023

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  • It is possible to an extent with certain breeds, e.g. Egyptian Mau. However, they are curious and skittish so may not follow you everywhere if they find something interesting or get spooked. When you get too far from their known “territory” they may stop and wait for you to come back, (while also yelling at you to come back to the concern of passers-by!).

    I used to go for walks with my gf and her egyptian maus. They would follow along like a pride of tiny lions but spread out a bit, so while we walked on paths their parallel routes would go through gardens, over roofs, fields, fences, etc.

    In fact it was more of an effort to train them not to follow us everywhere, e.g. to the shops, work, etc. They would often follow neighbours’ children to school and back (and sometimes follow the wrong child home and get lost!).

    Maus are also more amenable to being on a leash than most breeds, although you need to get them used to it early in life.

    The main problem is if they decide to run away from something they are blazingly fast and near impossible to catch and recover from whatever inaccessible perch or hidey-hole they run to. My gf’s cats had been trained to return to the sound of jangling keys, but that only worked most of the time.









  • Sorry, but this is completely wrong.

    Windows has ACLs and they are an important part of Windows administration, and used extensively for managing file permissions.

    Windows has supported ACLs on NTFS since Windows NT & NTFS were released in 1993 (possibly partly influenced by AIX ACLs in the late 80s influenced by VMS ACLs introduced the early 80s).

    ACLs were not introduced to standard POSIX until c.1998, and NFS and Linux filesystems didn’t get them until 2003. In fact, the design of the NFSv4 ACL standard was heavily influenced by the design of NTFS/Windows ACL model – a specific decision by the designers to model it more like NTFS rather than AIX/POSIX.

    Technically, at the filesystem level, exFAT also provides support for ACLs, but I am not sure if any implementation actually makes use of this feature (not even Windows AFAIK, certainly not any desktop version).




  • Correct me if I’m wrong

    Well actually, yes, I’m sorry to have to tell you are wrong. Shannon-Fano coding is suboptimal for prefix codes and Huffman coding, while optimal for prefix-based coding, is not necessarily the most efficient compression method for any given data (and often isn’t).

    Huffman can be optimal given certain strict constraints, but those constraints don’t always occur in natural/real- world data.

    The best compression method (whether lossless or lossy) depends greatly on the nature of the data to be compressed. Patterns and biases can make certain methods much more efficient (or more practical) in some cases, when they might be useless elsewhere or in general. This is why data is often transformed before compression, using a reversible transformation that “encourages” certain desirable statistical characteristics in the data, so the compression method can better exploit them.

    For example, compression software (e.g. gzip) may perform a Burrows-Wheeler transform and other encodings before applying Huffman coding to get a better compression ratio. If Huffman coding was an optimal compression method for all possible data, this would be redundant! Often, E.g. in medical imaging, audio/video data, the data is best analysed in a different domain to better reveal the underlying patterns and redundancies in the data so they cam be easily exploited by compression. E.g. frequency domain instead of time/spatial domain.




  • zero_iq@lemm.eetoLinux@lemmy.mlCircles do not exist
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    1 year ago

    Damn, so what’s the name of the shape that’s a flat donut with an inner and outer circular perimeters? i.e. a filled circle with another smaller radius circular area subtracted from it. Or 2D cross section of a torus seen perpendicularly to the plane that intersects the widest part of the torus. A squished donut, or chubby circle, if you like.


  • zero_iq@lemm.eetoLinux@lemmy.mlCircles do not exist
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    1 year ago

    And many “circles” aren’t circles either, but 2D torus approximations. The edge of a true circle is made of infinitesimally small points so would be invisible when drawn. And even if you consider a filled circle, how could you be sure you aren’t looking at a 1-torus with an infinitessimally small hole? Or an approximation of all the set of all points within a circle?

    Clearly, circles are a scam.