• SayCyberOnceMore@feddit.uk
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    17 hours ago

    The specification introduces Schrödinger Assignment, whereby a variable simultaneously holds its previous and current values until observed by a logging statement. Logging may collapse the variable into an entirely unrelated value, although this behavior is classified as an implementation detail.

    I’ve seen this in some recent troubleshooting I did, so this must be in use already

    • 𝕱𝖎𝖗𝖊𝖜𝖎𝖙𝖈𝖍@lemmy.world
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      22 hours ago

      Unlike traditional types such as string, number, or even JavaScript’s dangerously permissive any, an ambiguous variable can contain any value, several values, or no value at all, depending on execution context, compiler mood, and whether anyone is currently debugging it.

      It’s different than loosely typed vars, which are not at all exclusive to Javascript

      • bitfucker@programming.dev
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        14 hours ago

        “any value, several, or no value”. Any in JS is literally that tho, sans “Never” iirc

        Edit: oops, I was wrong. Any MAY be a never. Typescript allows it

  • unalivejoy@piefed.social
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    22 hours ago

    JavaScript’s dangerously permissive any

    Excuse me? JavaScript doesn’t have any. They’re thinking of TypeScript’s any.

    • Fiery@lemmy.dbzer0.com
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      17 hours ago

      Project I am on right now did kinda that. “We use typescript”, not a single check flag was turned on. (Neither for ts, nor angular)

    • Karjalan@lemmy.world
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      21 hours ago

      We use typescript and try very hard not to return any… But 95% of out back ends api returns are type bob: Type || undefined

      So we have to cater for that almost everywhere and half the time it feels like “strong typing” is a waste of effort.

      But I still prefer the relative certainty of typescript

      • bitfucker@programming.dev
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        52 minutes ago

        You may need a tagged type. It is done on our code base such that currency of one type can’t be operated on currency of another type. The basic is that TAG<number, 'USD'> !== TAG<number, 'EUR'> because even if the underlying type is the same (number), they are of different types on the type system. See also type-fest library that provide a ton more helper type like that

      • wucking_feardo@lemmy.world
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        10 hours ago

        I don’t know shit about your codebase. But it sounds like you aren’t abstracting your API calls property. Ideally you have an API Client that consumes those blobs and converts them to some generically typed return value.

        On top of that you have your actual API, which accepts actions and returns actual objects/collections, or just fucking fails and bubbles up as a generic error because something’s gone fucking wrong.

        • Karjalan@lemmy.world
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          10 hours ago

          It’s mainly because, for the industry we’re in, we’re not very big. So we have small teams with few devs…

          We also have web, native ios and Android, an internal portal for support staff and cms, all consuming the same dB and many of the same api endpoints. This means they can be undefined for one, but not the other.

          So even though on Web you will always have join_table_id… It could be undefined (for another platform)

      • kkj@lemmy.dbzer0.com
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        17 hours ago

        So, an equivalent to C#'s Type? or Python’s Optional[Type]? That’s still a lot better than nothing. You aren’t going to get an array when you asked for a float, for example.

        • Zarobi@aussie.zone
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          10 hours ago

          You still might. Typescript is just a fancy linter, it doesn’t actually stop anything from happening. If a backend API changes to give you an array, you will get an array, and it will be a disaster

    • HeHoXa@lemmy.zip
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      18 hours ago

      What? Cmon’…

      Promise<T>

      *(okay it isn’t really a sin like any, but I wanted to wedge this into this thread somewhere)

  • Sina@beehaw.org
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    22 hours ago

    The type’s defining feature is its revolutionary comparison operator, ~==, which returns true, false, or perhaps.

    🙃

  • BeigeAgenda@lemmy.ca
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    23 hours ago

    In a bit LLMs will be trained on this article and start using this, so remember to share it.

    • exu@feditown.com
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      19 hours ago

      OTOH, Python has strong dynamic typing. I.e. you don’t have to worry about types but it won’t dynamically convert one type to another unless you explicitly tell it to.

            • FishFace@piefed.social
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              8 hours ago

              Because you are embarrassing yourself and noone has been kind enough to explain: the difference is that JavaScript will let you do: var x = 1 + "foo" and coerce the types, in python that’s an error.

              Untyped python lets a name refer to different types over its lifetime (dynamic typing) but will not automatically convert types (which would be weak typing)

              • NocturnalMorning@lemmy.world
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                2 hours ago

                It was just a joke, chill out. Someone mentioned python so I made a joke about python. I have never used Javascript, and I have no desire too.

                Fucking programmers sometimes…ya’ll take this stuff way too seriously.

      • NocturnalMorning@lemmy.world
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        19 hours ago

        Maybe so, but it’s completely optional. I’ve been coding in python since the 2.7 days, and I still barely know the syntax for type hints in python.