TIFU by not using objects in my object-oriented programming coursework
TIFU by not using objects in my object-oriented programming coursework
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Most of my college coursework was around OOP. That said, they actually did a pretty lousy job of explaining it in a practical sense, so since we were left to figure it out ourselves a lot of our assignments ended up looking like this.
At the end of the program, our capstone project was to build a full stack app. They did a pretty good job simulating a real professional experience: we all worked together on requirements gathering and database design, then were expected to build our own app.
To really drive home the real world experience, the professor would change the requirements partway through the project. Which is a total dick move, but actually a good lesson on its own.
Anyway, this app was mostly about rendering a bunch of different views, and something subtly would change that ended up affecting all views. After the fact, the professor would say something to the effect of "If you used good objects, you'll only have to make the change in one place."
This of course is only helpful if you really appreciated the power of OOP and planned it from the start. Most of us were flying by the seat of our pants, so it was usually a ton of work to get those changes in
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If you used good objects, you'll only have to make the change in one place
IMO that's generally a retroactive statement because in practice have to be lucky for that to be true. An abstraction along one dimension -- even a good one, will limit flexibility in some other dimension.
Occasionally, everything comes into alignment and an opportunity appears to reliably-ish predict the correct abstraction the future will need.
Most every other time, you're better off avoiding the possibility of the really costly bad abstraction by resisting the urge to abstract preemptively.
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Generally true, but if the professor in this context was not a moron, he probably mentioned at the start of the class that he would be forcing a change to requirements part way through the course. Ideally, he would've specified what kind of changes this would be, in order for the students to account for that in their design. I think it's likely this happened, but the student was lacking so much experience he didn't understand that hint or what he needed to do in the design in order to later swap parameters more easily. I'm going to withhold judgement on this professor having only heard a biased account. It could've been a very good assignment, now being told from the perspective of a mediocre student.
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That's a fair assessment. It's kind of like the rule for premature optimization: don't.
With experience you might get some intuition about when it's good to lean into inheritance. We were definitely lacking experience at that point though.
OOP is a pretty powerful paradigm, which means it's also easy to provide enough rope to hang yourself with. See also just about any other meme here about OOP
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Same, I always remember this with interfaces and inheritance, shoehorned in BS where I'm only using 1 class anyway and talking to 1 other class what's the point of this?
After I graduated as a personal project i made a wiki for a game and I was reusing a lot of code, "huh a parent class would be nice here".
In my first Job, I don't know who's going to use this thing I'm building but these are the rules: proceeds to implement an interface.
When I have to teach these concepts to juniors now, this is how I teach them: inheritance to avoid code duplication, interfaces to tell other people what they need to implement in order to use your stuff.
I wonder why I wasn't taught it that way. I remember looking at my projects that used this stuff thinking it was just messy rubbish. More importantly, I graduated not understanding this stuff...
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I wouldn't say that inheritance is for avoiding code duplication. It should be used to express "is a" relationship. An example seen in one of my projects: a mixin with error-handling code for a REST service client used for more than one service has log messages tightly coupled to a particular service. That's exactly because someone thought it was ok to reuse.
In my opinion, inheritance makes sense when you can follow Liskov's principle. Otherwise you should be careful.
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inheritance to avoid code duplication
What no, inheritance is not for code sharing
Sound bite aside, inheritance is a higher level concept. That it "shares code" is one of several effects.
The simple, plain, decoupled way to share code is the humble function call, i.e. static method in certain langs.
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but
Strings are objects 😔 -
This is Java, so you can even turn those ints into Integers and doubles into Doubles if you want to maximize the objects in that part of the code. In all seriousness, though, it looks perfectly fine to me.
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Great idea, but unfortunately technicalities won't get me marks.
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But answer07 is an object... Not sure what your teacher/ta disliked 😆
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I presume WeatherData.getData() should be going into some Data class that has multiple properties (using the , as a delimiter) instead of what OP is doing and just using the String
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I mean, unless it's explicitly specified, one can still argue. For fun, that is. I did it a few times with stuff like using maps when the task said I couldn't use loops. Didn't really get into trouble since there was a proper solution ready as well.
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Oh, I haven't handed it in yet. We were supposed to write our own methods.
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So really it's in a few days iwfu(I will fuck up)
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To be needlessly pedantic on this joke, answer07 in itself is not an object, but a class, a blueprint for objects. An instance of that class would be an object. Calling the static function main does also not create an instance of the class in the class loader.
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Hey now, you should be thanking your teachers for this incredibly valuable early life lesson on the difference between what the customer says that they want and what they actually need, and which of these two you are going to get paid more for!
Remember: the customer is always right!
/s
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and which of these two you are going to get paid more for
the secret answer to this is
neither :(
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Hmmm...yes this isn't C#....this isn't C# at all. I can't read this.
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TIFU by using eclipse