• ZILtoid1991@lemmy.world
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    4 hours ago

    Entity Component System all the things!

    I might write an XML ECS parser, as a joke. Practical? No! Probably even slower than the XML DOM? Yes! Funny? Yes!

  • NigelFrobisher@aussie.zone
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    18 hours ago

    Examples of inheritance hierarchies are always totally useless shit like this - what if a cow is an animal; What if a cow is a mammal, all mammals are animals and all mammals have a lactate() method?

    • ulterno@programming.dev
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      4 hours ago

      Because any real life use that might come to mind would probably be related to some NDA protected database in a company.
      And it is otherwise hard to think of anything at the spot, so just go with what the first example on the web-search came up with.

  • kibiz0r@midwest.social
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    23 hours ago

    The venerable master Qc Na was walking with his student, Anton. Hoping to prompt the master into a discussion, Anton said “Master, I have heard that objects are a very good thing - is this true?” Qc Na looked pityingly at his student and replied, “Foolish pupil - objects are merely a poor man’s closures.”

    Chastised, Anton took his leave from his master and returned to his cell, intent on studying closures. He carefully read the entire “Lambda: The Ultimate…” series of papers and its cousins, and implemented a small Scheme interpreter with a closure-based object system. He learned much, and looked forward to informing his master of his progress.

    On his next walk with Qc Na, Anton attempted to impress his master by saying “Master, I have diligently studied the matter, and now understand that objects are truly a poor man’s closures.” Qc Na responded by hitting Anton with his stick, saying “When will you learn? Closures are a poor man’s object.” At that moment, Anton became enlightened.

  • tiramichu@sh.itjust.works
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    1 day ago

    I’ll say this now.

    Inheritance is the most misused capability of OOP which programmers think makes their code look smart, but most of the time just makes a giant fucking mess.

    • mesa@piefed.social
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      23 hours ago

      Its the best/worst thing about OOP no matter what language.

      We had a rule at work that if you are 3 levels or more down an inheritance tree, then you are too far. The cognitive load is just too much, plus everything stops making sense.

      One level can be great (MVC all have great conventions, MCP as well). Two can be pushing it (Strategy pattern when you have physical devices and cant be connected all the time, Certain kinds of business logic that repeat hundreds of times, etc…) But even there you are kinda pushing it.

      I need code that I can look at a month from now and know WTF is happening. And sometimes its better to have less DRY and more comprehension. Or maybe im just a forever mediocre dev and dont see the “light”. I dunno.

      • sip@programming.dev
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        1 hour ago

        composition can help with all of that. factories, strategies, injections are all composition patterns that work fine.

        business logic that repeats? extract it to it’s own thing (class, function, etc) and pass it as a param to the supposed childs.

        mvc? controllers don’t need to extend anything, just have them accept the framework through the constructor and request and response as args. views? same. models? perhaps only if doing an active record, but a repo pattern with plain objects is a good pattern too.

        I never seen a clean inheritance implementation for a decently sized problem. it mostly works for tiny ones.

      • Ethan@programming.dev
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        8 hours ago

        When I first started using Go I bemoaned the lack of true inheritance and classes. Now I love it.

      • tiramichu@sh.itjust.works
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        22 hours ago

        This is exactly how I feel too. A little bit of repetition is totally worth it, versus having inappropriate coupling, or code that jumps in and out of parent/child classes everywhere so you can hardly keep it in your head what’s going on.

        I freely accept that I AM a mediocre dev, but if that lends me to prefer code that is comprehensible and maintainable then I think being mediocre is doing my team a favour, honestly.

      • fibojoly@sh.itjust.works
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        7 hours ago

        PTSD flashbacks to the codebase I started on in 2008 which had… I don’t even remember. Like six or seven levels. Fucking nightmare. I did a printout of the analysis Doxygen gave me and it ended up as a 4x3 meters poster ;_;

      • calcopiritus@lemmy.world
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        21 hours ago

        But if I have to make an Array I have to inherit from Indexable which inherits from Collection which inherits from Object! How else am I supposed to implement an Array?

        • mesa@piefed.social
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          18 hours ago

          I remember some crazy stuff back when I had to work with a Java + ember.js project. Everything was like that.

      • Grendel@tiny.tilde.website
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        23 hours ago

        @mesamunefire
        @tiramichu

        I totally agree on this. I found that often things that appeared to need inheritance at first glance often didn’t if I gave deeper thought to it.

        Granted I was working on much smaller projects rather than crazy huge multi team enterprise apps, but I’d guess that even then this is a good “rule of thumb”.

        • mesa@piefed.social
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          23 hours ago

          Cool, good to know someone else has the same experience.

          Ive been on a couple of multi-year projects and they are NOT fun with OOP + developer went crazy with patterns they were experimenting at the time. Its what made the “rule” pop up to begin with.

    • red_tomato@lemmy.world
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      1 day ago

      Hold on, I’m in the middle of drawing an inheritance graph so I know how Dog is related to AircraftCarrier.

      • blackn1ght@feddit.uk
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        1 day ago
        public interface ICanTravelThroughTheAir
        {
        
        }
        
        public class Flea : ICanTravelThroughTheAir
        {
        
        }
        
        public class AircraftCarrier
        {
          private readonly List<ICanTravelThroughTheAir> _aircraft = new();
        
          public void AddAircraft(ICanTravelThroughTheAir flyingThing)
          {
            _aircraft.Add(flyingThing);
          }
        }
        
        public class Dog : AircraftCarrier
        {
            public void Woof()
            {
                Console.WriteLine("Bitch I'm an aircraft carrier!");
            }
        }
        
        public static class Program
        {
          public int Main(string[] args)
          {
            var dog = new Dog();
            
            for (var i = 0; i < 10000; i++)
            {
                dog.AddAircraft(new Flea());
            }
        
            dog.Woof();
          }
        }
        
        • ZILtoid1991@lemmy.world
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          4 hours ago

          Now someone needs to make it an entity component system!

          Attempt 1:

          public struct Entity {
            bool isDog : 1;
            bool isAircraftCarrier : 1;
            bool isFlea : 1;
            bool canFlyInAir : 1;
            ubyte opt_numOfAircrafts : 4;
            int entityID;
            int opt_parentID;
            static Entity createDog(int entityID) {
              Entity result;
              result.isDog = true;
              result.entityID = entityID;
              return result;
            }
            static Entity createFlea(int entityID) {
              Entity result;
              result.isFlea = true;
              result.canFlyInAir = true;
              result.entityID = entityID;
              return result;
            }
            void addAirCraft(ref Entity aircraft) {
              if (aircraft.canFlyInAir && this.isAircraftCarrier) {
                aircraft.opt_parentID = this.entityID;
                this.opt_numOfAircrafts++;
              }
            }
            void woof() {
              if (isDog) {
                if (isAircraftCarrier) writeln("I'm a motherfucking aircraft carrier");
                else writeln("Woof!)
              }
            }
          }
          
          void main() {
            Entity dog = Entity.createDog(1);
            Entity flea = Entity.createFlea(2);
            dog.woof();
            dog.isAircraftCarrier = true;
            dog.addAirCraft(flea);
            dog.woof();
          }
          
          • Supercrunchy@programming.dev
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            1 day ago

            And dependency injection!

            Every class needs to use DI for calling other classes, even though we’ll have anyway just a single implementation for all of them, and we won’t be using this flexibility at all (not even for tests where it might be useful for mocking dependencies).

      • criss_cross@lemmy.world
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        1 hour ago

        Was gonna say just this. Inheritance is powerful but something to reach for sparingly. 80% of the time aggregation and composition can solve the problems.

        I’ve cleaned up too many inheritance nightmares in my day from people who insisted inheritance was the way to go.

    • FunkyCheese@lemmy.dbzer0.com
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      1 day ago

      I learned about it in school and we didna few assignments for it

      But… never seen or heard anyone mention it outside of that

      I guess we can make up some nische vases

      I did hear it can be useful for video games though. But then again im sure people can manage fint without, as well

      • Valmond@lemmy.dbzer0.com
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        1 day ago

        It’s wildly useful, when you store a lot of similar stuff, or treat a lot of similar stuff etc.

        Like a GUI, a rendering engine or a scientific soft. Video games, any soft with users, and so on.

        I get that people misuse it but for me it’s wild that people think you should like program without it, like at all cost.

      • Railcar8095@lemmy.world
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        1 day ago

        We use it a lot when we have a solution that works for 95% of customers and a few need random things.

        Else we will have multiple markets changing the same function with a thousand if else

        Main issue is that makes it so that some functions are never generalized, like when customer A wanted to use an equal filter, customer B wanted a IN filter, and the rest have no filtering capability at all.

    • vapeloki@lemmy.world
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      1 day ago

      And polymorphism is the only way you could expose those composite Interfaces as bindings on C API based languages. And polymorphism is part of OOP.

      If we take the text book definition of OOP, then the kernel is OOP …

  • RustyNova@lemmy.world
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    1 day ago

    I LOVE TRAITS. YOU’LL HAVE TO TAKE THEM FROM MY COLD DEAD HANDS

    [Insert SpongeBob screaming meme]

    • PlexSheep@infosec.pub
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      19 hours ago

      TRAITS ARE SO USEFUL AND STRUCTS ARE EASILY REPRESENTED IN MEMORY AND WORKED WITH, COMBINED THEY WILL TAKE OVER THE LINUX KERNEL AND THE WORLD

    • wewbull@feddit.uk
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      2 hours ago

      Do you include “traits” and “interfaces” under the title “inheritance”?

    • Supercrunchy@programming.dev
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      1 day ago

      It might be nice to use in some very specific cases (e.g. addition-operation is a binary-operation AST node which is an AST node).

      In most of the cases it just creates noise though, and you can usually do something different anyway to implement the same feature. For example in rust, just use enums and list all the possible cases and it’s even nicer to use than inheritance.

  • Hirom@beehaw.org
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    1 day ago

    Separating data structure from implementation has benefits.

    In languages with classic OOP classes and objects, it’s often necessary to write wrappers or adapters to allow new operations on existing objects. This adds overhead and require more code.

  • panda_abyss@lemmy.ca
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    1 day ago

    I wish I could take go’s interfaces and drop them into zig, and that’s all the object oriented concepts I need.