Goodbye, shitty Car extends Vehicle object-orientation tutorial (2011)

Post by tgv » Fri, Jun 24, 2022, 12:36 PM UTC

substation13 wrote: post #36

The OOP community fascinates me. It's clear that OOP in the sense of "Car extends Vehicle" is not a good idea, yet the classic OOP languages go out of their way to support this kind of programming. Meanwhile the alternative approaches require you to jump through a bunch of hoops or apply convoluted "design patterns". Writing good, modern "OOP" you are often fighting the OOP language! Things are getting somewhat bette…

Post by Joker_vD » Fri, Jun 24, 2022, 12:45 PM UTC

quietbritishjim wrote: post #24

Perhaps this would work: Build a program that... * That has a hardcoded list of strings baked into it * Accepts as inputs a filename (but can be empty) and a substring to search for * At runtime, either (a) (if filename empty) iterates over hardcoded list of strings, or (b) opens file and iterates over lines in it * For each string / line, if contains search string then output to stdout (and maybe also increment a co…

    static void Main(string[] args) {
        var filename = args[0];
        var needle = args[1];
        var linesToProcess = filename != '' ? File.ReadAllLines(filename) : HardcodedLines;
        ProcessLines(linesToProcess, needle);        
    }

    static void ProcesLines(string[] linesToProcess, string needle) {
        // lines-processing code...
    }

    static void Main(string[] args) {
        var filename = args[0];
        var needle = args[1];
        var linesProvider = filename != '' ? FileLinesProvider(filename) : MemoryLinesProvider(HardcodedLines);
        ProcessLines(lineProvider, needle);
    }

    static void ProcesLines(ILinesProvider linesProvider, string needle) {
        var linesToProcess = linesProvider.GetLines();
        // lines-processing code...
    }

Post by praptak » Fri, Jun 24, 2022, 12:47 PM UTC

bdg wrote: post #21

I actually like to ask people in interviews to model a car and car factory because I want to see right away if they go deep into the nonsense of extending everything, or if they can use composition, or get away with something focused on maintainable code that meets requirements. I've seen it all. Prius extends Car extends vehicle extends motor extends ... Right within the first five minutes of the interview. But I al…

    You can’t add code to ducks.

    You can’t refactor ducks.

    Ducks don’t implement protocols.

Post by a4isms » Fri, Jun 24, 2022, 12:59 PM UTC

alangibson wrote: post #6

> In good OO programming, we don’t make class hierarchies in order to satisfy our inner Linnaeus I wish someone had told me this when I first started coding. I wasted so much time building pointless hierarchies based on ontology rather than DRY.

Post by everyone » Fri, Jun 24, 2022, 1:06 PM UTC

substation13 wrote: post #36

The OOP community fascinates me. It's clear that OOP in the sense of "Car extends Vehicle" is not a good idea, yet the classic OOP languages go out of their way to support this kind of programming. Meanwhile the alternative approaches require you to jump through a bunch of hoops or apply convoluted "design patterns". Writing good, modern "OOP" you are often fighting the OOP language! Things are getting somewhat bette…