I feel like you cannot mention null coalescing operators without mentioning they they do not work properly with UnityEngine.Object types. Which is a major part of Unity development. The equality operators (== and !=) for UnityEngine.Object types have been overridden by Unity, and don't only perform reference comparisons, this makes it possible to Destroy an Object somewhere, and have an entirely different reference evaluate to null. What this also means is that these objects are not actually null, and attempting to use them will cause exceptions and various other issues. The null conditional (?.) null coalescing (??, ??=) operators, and is null checks (is null, is not null, is {}) will not function correctly, as Unity cannot override those operators.
that just happens to be a case where you shouldn't be using a unity object at all. if you need that actual c# null just use a basic c# class instead of derriving unityengine.object.
Wish I read this before I went through like 20 scripts and changed all my if == null to ??= thinking I was making my code a bit neater... only to get nonstop game object not found errors.
This is exactly why I absolutely hate writing "== null" in Unity. It just expresses intent so horribly, you write null checking code but in reality you just want to know if the object had been destroyed. Instead I either use the fact that UnityEngine.Object types have implicit conversion to bool (by writing if(object) ...) or make and use an extension method (like if(object.IsDestroyed()) ... ) And I use the "is null" / "is not null" syntax when I actually want to check for null reference. That way I don't have to think twice about the intent of the code I'm reading.
this! although he's at a higher level than Brackeys and assumes the audience knows a lot more coding terms and concepts, I wish he'd go a liiittle bit slower sometimes.
Great tips. The only issue I have is with putting behavior in the Property. The problem is that when a setter is called that's all you expect to happen. When unexpected behavior happens, especially if something breaks, chasing down the problem becomes difficult.
Yeah that tip I also strongly disagree with. Never ever would I recommend putting special behaviour in getters or setters. Getters and setters should only do that - get and set. If you want some kind of extra validation, add an extra method which handles the validation, and then sets the member via the basic setter. Because sometimes you want to set a value which is not valid - for debugging purposes for example or for tests, or other reasons. And a basic setter is the last place where you look at, when you want to find out why your member doesn't have the value you assigned to it., because you expect it to do its job and nothing else.
I have been developing on Unity and C# for a year now, but most of these tips were new and useful to me. So bases on the title of this video I'm still a beginner...DDD
Eitherway using a StringBuilder or not, you are creating 10k Strings. What you gain by using a StringBuilder is not building intermediate Strings, which get "previous Strings + current String" assigned to it and thrown away after the next concatenation. I didn't benched it but i would use the build step AppendFormat for appending something formatted instead interpolating it and then append it. Or append both parts of the string "A string: " and the int separately. But that could be a micro optimization. Great video Matt!
You're the first person to take note of my name in a video and call me by it! I've enjoy all the comments you leave on my videos by the way. The extra little bits of information I leave out which are equally important. Really appreciate you spreading your knowledge!
We totally won't have access to this for a while in Unity, but in .NET 6 StringBuilder's methods take in interpolated strings and process the formatting logic internally without allocating a string. All of this stands true until we get .NET 6, but it's worth noting when you're programming outside of Unity!
@@vertxxyz In my younger dev days I had an application in production with a few companies using it. One of it's functions was to take a bunch of rows from a register (10k+ sometimes) and build a PDF to download/print. The server would sometimes lock up, not just for the person trying to print a PDF, but for all the companies at that time... Turns out concatenating 15 fields separately from each row is not ideal when you have 10k items...
You probably learned multivariable analysis, numerics, algorithmics, complexity theory, logic, etc? My CS degree was not focused on programming AT ALL. We had like 4 modules where we even used a computer, lmao.
@@smokinglife8980 While this statement is true, a degree will still help. This might not be true for your country, but since uni is free here it's way harder to get a job in the field if you don't have a degree. Everyone who is capable of getting a CS degree and wants to go into the field usually just gets one, so if you don't have one you'll not exactly be first choice. If you're not capable of that and just have an apprenticeship (or nothing at all) you'll usually earn a lot less for the same job and your career options are severely limited unless you're just super good at your job. I find it weird, because CS is not inherently about programming and many unis don't focus on programming very much. My CS degree comes in handy only when dealing with very complex stuff or difficult maths, which is not very often.
I got that degree only so I have something to fall back on if my grand ambitions to become a full-time gamedev fail. :D But I gotta say, it was a lot of fun and I found somewhat of a passion in the field, but maybe that's just Stockholm Syndrome, lol.
So many good tips! Especially with the string builder. That could make a huge difference with a text heavy game. I suppose you can also use null coalescing for lazy loading. Say for example your code requires a rigidbody. rb ??= gameObject.AddComponent(typeof(Rigidbody)) as Rigidbody; though I'm sure it's better to have the user put it themselves with desired values Edit: oops, shoulda read the pinned comment. Probably good for other lazy loading though.
I personally don't (or rarely) use the else statement for anything. It makes my code easier to understand (for me) and much cleaner with less brackets. I also don't use the switch statement at all. Instead, I just do a bunch of "if() return;"s. I don't know if there's any performance impact on my choices but like you mentioned it's just my personal preference. :) Love your videos
You should really consider using switch though, especially if you are using multiple "if() return;"s. In games performance is important and switch has better performance than multiple ifs. The compiler doesn't just generate a bunch of ifs when lowering switch, it often uses binary search or hashing.
The "set override" was neat to me. I come from a predominantly Java background, so learning new C# things is nice for me, and gives me more reasons to like it over Java. Being able to effectively bind a value to a string is super handy. No more calling update/refresh functions.
is there a video that explains the use of the "using" keyword? I didnt know it had uses outside of calling for namespaces/statics at the top of you script. I tried reading the docs page for it but i didnt really understand it.
It's a special keyword specifically for the Idisposable interface. It allows you to encase some logic which uses the disposible class, giving you granular control for when to call dispose.
Do you mean the variables? It's actually proper c# convention. Only unity decided to discard any decent naming conventions and just wing it. Can you look at a variable in a function and know if its a local or private global, or do you use the same naming convention for both of those things? 😉
@@Tarodev I was referring to the namespaces, namespace _Scripts { ... } in your examples. I know a lot of people use _ for private fields. I was using it for a long time as well but at some point stopped and I am still alive :D. I feel like the IDE gives me enough context to distinguish. Obviously this is all a matter of personal preference.
@@fejza Ahhhhh! Yes, that's just a byproduct of prefixing the scripts folder in the unity engine with an underscore. Certainly a gross one at that. I'd never purposefully do it >
What’s the difference between using ?? and ||. I usually do something like this: var something = somethingElse || somethingMoreElse; which sets something to somethingMoreElse if somethingElse is null. Edit Turns out I was thinking of javascript. Lol
@@nerdin8or Oh I totally am thinking of javascript wow. I started writing all these things about how I am not mistaken but then when I went to check what does happen in your scenario it was confused. Lol yeah I guess thats what happens when your code in both languages every day and also comment on a youtube video in the middle of the night half asleep
@@nerdin8or Haha yeah. I start a new project just about every 3 days and so I test out the concept on javascript first cause its way easier to get a previs for it on there with the P5 Editor. So I feel ya
@@Tarodev I don’t mean to come across as overly sensitive. More that your channel is great and doesn’t need teenage boy humour. But idk what the algorithm likes I guess haha so…
@@Letsamplay I don't mean to offend and I'm sorry if I did. I may be guilty of having teenage boy humor to be honest 😂 Hopefully more people like them than not >
@@Tarodev You shouldn't care about anyone being offended. At the end of the day that is their problem and not yours. If anything, seeing these "offensive and dirty" titles just reminds me that the video is made by you, which I then instantly associate by quality and want to watch it. Be yourself, and thank you for the amazing content!
Great tips, I knew most of them but things like string builder and the print are good to know . This would have been so valuable to have when I was starting out so good job
The number of unity tutorial vids where I see people doing: if (condition) { return true;} else { return false;} across up to 8 lines is obscene! And I've used the inverted if approach for many years now, massively improves legibility. Also mimicks preconditions, a principle in CompSci proof stuff (it's been many years since I did my CompSci degree!). However, if you can possibly avoid them, do, because it is adding branching logic which is computationally expensive - i.e. only do this for really important conditions. It's why substates can be important to avoid typical state checking logic.
That title!!! Hahaha nice. And good video. Maybe post videos during 2-3 pm for pst cause that’s when the most eyeballs are active in the world. But I understand you might be posting at prime time for where you live so it’s just a suggestion
I'm experimenting with timezones right now. It's nice having an immediate rush when it's first released, but over time it doesn't seem to make much difference.
@@Tarodev Oh yeah that seems to be the case for a channel as big as yours but for mine, that "rush" determines if my video gets 500+ vies or nothing at all and fades away in existence. But for you the rush can be a valuable time for figuring out if a video thumbnail and title is the best match. This video at 8:02 explains this well and its by Veritasium so you know its good: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-S2xHZPH5Sng.html
@@SpicyMelonYT Ahh, I love that video! So true. I should go through some videos and change up the name/desc/thumbnail to see if it sheds some extra views on it.
@@Tarodev You definitely got me as an invested viewer and subscriber! Love watching you videos cause as someone who is completely self-taught with programming (youtube and forums taught) I love seeing clean code and sleek examples that you make! Hopefully more people share that view in the future!
