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@cantstopthesignal@sh.itjust.works to Programmer Humor@lemmy.ml • 1 year ago

The code was very janky, but it worked

i.imgflip.com

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The code was very janky, but it worked

i.imgflip.com

@cantstopthesignal@sh.itjust.works to Programmer Humor@lemmy.ml • 1 year ago
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  • @FiskFisk33@startrek.website
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    1 year ago

    is this really a feature not built into Java Script?

    x % 2 == 0

    • @marcos@lemmy.world
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      28•1 year ago
      (+x) % 2 == 0
      

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

      • @Kindness@lemmy.ml
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        8•1 year ago

        (+x) % 2 === 0

      • @FiskFisk33@startrek.website
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        5•1 year ago

        I am not good friends with js, what did I miss?

        • @mindbleach@sh.itjust.works
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          14•1 year 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.

          • @PoolloverNathan@programming.dev
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            5•1 year 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@sh.itjust.works
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              4•1 year ago

              Yet the array contains exactly three nothings.

              It’s like a zen koan.

            • @cantstopthesignal@sh.itjust.worksOP
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              2•1 year ago

              Time is a flat circle

          • @Kindness@lemmy.ml
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            5•1 year 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.

          • @cantstopthesignal@sh.itjust.worksOP
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            2•1 year ago

            We wrote it wrong on purpose, as a joke.

            • @mindbleach@sh.itjust.works
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              1•1 year 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.

        • @marcos@lemmy.world
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          7•1 year 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.

          • @FiskFisk33@startrek.website
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            1 year 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@sh.itjust.works
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          6•1 year ago

          Not a JS dev either but ===.

          Not really sure what the (+x) is about

          • @FiskFisk33@startrek.website
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            1•1 year ago

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

            • @marcos@lemmy.world
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              1 year 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.

              • @FiskFisk33@startrek.website
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                2•1 year ago

                point taken!

      • @affiliate@lemmy.world
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        3•1 year ago

        what does the +x do.

        • @marcos@lemmy.world
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          6•1 year ago

          It makes sure x is a number.

          • @affiliate@lemmy.world
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            9•1 year ago

            what a wonderful and beautiful language. i’m so glad i asked

            • @ArtVandelay@lemmy.world
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              1•1 year ago

              And so wonderfully similar to the way that symbol is used in other languages as well. Gosh darn it I love JavaScript

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