• @[email protected]
          link
          fedilink
          262 months ago
          (+x) % 2 == 0
          

          If you forget for a second it’s Javascript, the language will turn back and bite you.

            • @mindbleach
              link
              132 months ago

              JS is a language where [1,2,11].sort() returns [1,11,2].

              And if you use a variable instead of a bare array, half the functions are side-effectful, as determined by coin toss.

              And if you try declaring that variable with new Array(3).map() then it will ignore all 3 indices, because undefined is real enough to be enumerated, but not real enough to be iterated, because, and I cannot overstress the importance of this principle in Javascript, go fuck yourself. Go fuck yourself is why.

              • @[email protected]
                link
                fedilink
                42 months ago

                Array(3) doesn’t create [undefined, undefined, undefined, ]; it creates [/* hole */, /* hole */, /* hole */, ]. The holes don’t set any property on the array whatsoever, so they are skipped when iterating. How this makes sense, I can’t tell you.

                • @mindbleach
                  link
                  32 months ago

                  Yet the array contains exactly three nothings.

                  It’s like a zen koan.

              • @[email protected]
                link
                fedilink
                42 months ago

                typeof(null) == ‘object’

                Because some people think planning an entirely new language should take less than 2 weeks. 10 days, in this case.

                See wat for more.

                • @mindbleach
                  link
                  12 months ago

                  The Wimp Lo doctrine is a valid theory for why JS is Like That.

                  If there’s two ways to do something, JS picks all three.

            • @[email protected]
              link
              fedilink
              62 months ago

              This evaluates to NaN for some reason:

              '10' % 0
              

              Since JS doesn’t really differentiate strings from numbers, except on the places it does, it makes sense to make sure you are working with numbers.

              • @[email protected]
                link
                fedilink
                2
                edit-2
                2 months ago

                Oh right that. I guess I was visualizing a scenario where you already checked for it being a number, such as a Number.isInteger(x)

                also, that suprises me a lot, you’d think this is one of the places where it treats stuff as numbers

            • @carpelbridgesyndrome
              link
              English
              52 months ago

              Not a JS dev either but ===.

              Not really sure what the (+x) is about

              • @[email protected]
                link
                fedilink
                12 months ago

                the remainder operator should return a number or a NaN right? do we actually need the triple here?

                • @[email protected]
                  link
                  fedilink
                  2
                  edit-2
                  2 months ago

                  Not really. But with JS it’s better safe than sorry.

                  The GP’s addition is unnecessary, but I fully support anyone that decides to do it.

      • @[email protected]
        link
        fedilink
        82 months ago

        the is_even package does not provide much worth indeed because it simply negates is_odd and thereby all its benefit.

        It’s dependency is_odd on the other hand provides at least some additional checks (it also checks if the value is a valid integer below the max int value)

        And while I would indeed see uses for such methods (especially with the other checks, no simple oneliners) in some cases, especially in testing: This is stuff you write yourself, throw it in a e.g. NumberUtils class and everything is fine. You do never depend on an external library for that. The benefit (not spending a few seconds to write it) does not outweigh any of the drawbacks that come with external libraries.

  • @[email protected]
    link
    fedilink
    532 months ago

    Damn bro I haven’t seen this meme format in over 20 years! Hopefully you don’t spend all that time debugging those proprietary functions ya goof

    • @cantstopthesignalOP
      link
      31
      edit-2
      2 months ago

      I’m just an old fart programming a neopixel as a hobby.

          • LostXOR
            link
            fedilink
            32 months ago

            Screw calculating values for variables, just initialize it pointing to a random memory address and get a value for free! (Assuming your program doesn’t segfault).

  • @[email protected]
    link
    fedilink
    5
    edit-2
    2 months ago

    The Power Of Math People

    (those that know known those that do not know do not know, those that know wish they didn’t know, those that don’t know wish they knew)