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Joined 3 years ago
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Cake day: June 21st, 2023

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  • jbrains@sh.itjust.workstomemes@lemmy.worldMaths
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    4 months ago

    If “close enough” works, then it’s nice to have the skill. Having the skill requires occasionally using it.

    Where accuracy is important, since we almost always have a calculator with us now, that’s a no-brainer.

    Maybe more to the point, though, understanding how percentages work is wise. It’s one of the few arithmetic topics that we encounter regularly in life.

    In this case, 23% of 53 and 53% of 23 each have their own little trick, depending whether you’d rather overestimate a little with 1/4 of 52 or underestimate a little with half of 24. I find it handy to be able to think that way, especially for example when trying to get out of a taxi and paying cash.



  • I have settled into this pattern:

    1. Name expands as I understand better the structural role of a thing. Duplication in names begins to become easier to spot.
    2. Removing duplication in names means introducing helpful structures, resulting in shortening names again, particularly as the intent/purpose of thing becomes clearer.

    Long names stay unnecessarily long when we don’t notice the patterns that suggest the missing structures.

    The more examples of this kind of thing, the better!

    (And my preferred name for that is rolesByEmployee. In general, “values by key”.)