What are Generics? (C# Basics)
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- เผยแพร่เมื่อ 4 เม.ย. 2020
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Constraints on Generic Type parameters
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Generics! Such a useful C# feature! Have you used them before?
Oh boy! I've been making a card game(looks pretty great so far) and I can't count how many times I asked myself "God I wish I could just write a function that takes and returns any type." This video and your video on delegates have turned my life upside down and probably saved me dozens of hours of slamming my head on my keyboard. cheers!
As top-notch as it gets! And I would add: There's a ton of over-the-top praise going on today (movies, politics, etc.) -- where excellence is not established in the craft, but rather the perception of what people think they see. This is pure craft -- and worthy of every bit of praise you get. I'm looking forward to watching more -- and many thanks for enlightening me. It's so good I can't believe some of this stuff didn't fully register before. But it's a testament to your work that I'm kicking myself. Thanks again!
Amazingly helpful lesson! I enjoy how you begin with the "lazy/incorrect" implementations before the 'proper' version. It definitely helps understand why you would want to implement the solution.
Thanks! I do work hard on the structure of the videos!
I love hearing tutorials say "the Func"
Da funk.
Really had a great time in learning these "unused" (in almost every tutorial) concepts. This should be the first playlist that everyone should go through in my opinion, otherwise they will end up just copying and pasting stuff without understanding them so much and having a hard time in creating their own clean and optimized code.
Just so you have an idea, I've been using Unity for one and a half years and never knew about these C# features until I found your channel (grid tutorial)! Hell, I didn't even knew that there were constant updates and discussions around programming languages! Learning about core concepts like these and good practices is truly understimated in the coding community. This opens so many doors into creating new things.
Anyways, I just wanted to thank you for showing people how much there is to learn besides simply implementing some specific features in a game! I think that once I master these concepts, I'll be able to have my games made quicker and more optimized!
Thanks for the kind words! Yup C# has tons of awesome features that a lot of people are seemingly afraid to use or just don't know about but if you take the time to learn them it will improve your code massively and make you much more productive.
Best of luck in your learning journey!
This tutorial is truly amazing. It's just opened a new door to me to work with Generics.
You are such a necessity for begginer programmers.Keep up the good work!
Again you turn something that seems daunting at first into something clear and easy to use! Cheers for the video ;)
You deserve way more popularity than you have. Especially when youtubers with 2m subscribers cover this exact topic without opening an IDE even once to show an actual hands on example, but instead rely on trying to talk about it alone. Seeing 23k views on this video when there are half-ass 4 minute videos with 1 million views on it makes me sad when they didn't even put 1/10th the amount of example, explanation, and precision you put into your video.
I'm glad you liked it!
definitely going to use these when I going to make a new tilemap system.
I was looking for a video on "Collections", somehow found this one, and I loved it. You got a +1 sub.
Keep it up, Mate.
Greetings from Germany.
Thanks! I'm glad you found the video helpful!
I like how after you present the concept of generics, you follow it with with some use case scenarios. Great video! 😅
I waited for this so looooooooooooooong. Thank you!
Another excellent tutorial - the examples really bring it to life. Thank you!
VERY useful and helpful video. I'll certainly add it to my bookmarks and will look at least one more time.
Simple and clear, this is how lessons should be! Thanks
i'm still quite new to coding so i'm super thankful for tutorials like this :)
slowly but surely you would realize you have to learn constantly and there isn't really a stage to which you will understand everything...
i know some java, c++, python, js, you name it.
yet i when i start coding in c#, i still come here humbly.
hope you enjoy coding and never give up learning.
Thank you, to create an amazing video.
It's helped me a lot to understand the c# Lang.
Thank you for your absolutely free but full of effort vidoes, I always come back to this channel whenever I want to learn something.
Thanks! I'm glad the videos have helped you!
Thanks for the video, learnt a lot of things here.
Awesome tutorial! Generics rocks!!! 👍🤓
Thanks mate! Very clear explaination!
Such helpful content!!
Thanks for sharing with your valuable knowledge and thoughts in explaining this topic abour generics. I really wanted to know it better.
I'm glad you found the vide helpful! Thanks!
Best Generics Tutorial. Thanks a lot. I have subscribed.
Thanks! I'm glad you found it helpful!
Waw just waawww ... you keep blowing me away with these amazing tutorials, i learned so much. thank you!
Now onto delegates
Helped a lot ❤️
You're simply awesome, Already watched a couple of your videos which I found pretty helpful!!,
And will be watching a lot more from your channel, So thanks you !!!!
I'm glad the videos helped you! Thanks!
Thanks this cleared up my fuzzy understanding of generics
Thanks for the video sir. 🙂🙌🏻
really well explained!
I was struggling understanding the concept of generics, understood it in the first 5min !
Thanks !
I'm glad the video helped you!
Was able to solve my code 4 minutes in. Bless you dude!
I'm glad the video helped! Thanks!
What a great tutorial!
What an amazing video, great explanation and editing, subbed and liked :)
I'm glad it helped you, thanks!
Great Teaching
This video is EPIC!!
I learned all of this on my own a few years back and it was a headache. I wish I had something like this then.
Keep up the great work!
I really dislike patreon for a lot of reasons, have you considered setting up a subscribestar or another way we can support you?
I have thought about just having a normal Paypal donate link but I also don't want to have way too many links which might confuse people.
If you pick up the game bundle from the website you'll be helping out the channel and get some cool games to play!
learning such thing is not gonna be even possible to me i'd give up so i respect you
yup as you can see we have a nice error xd since when errors are nice, great video as always.
more vids for this playlist please!
This was very helpful Thankyou :)
I'm glad you found it helpful!
Thank you, I like this video
Amazing explanation.
I'm glad the video helped! Generics are super poweful!
Thank you!!!!!
thank you :)
Тhank you very much for the lesson, very clear, helped :)
In short, a generic is a type compiled for user-defined types, at compile or execution time, capable of enabling a wide range of operations on the same type, or on types with similar properties. Unlike Java, where they are just abstractions from the runtime, in C #, generics effectively generate code.
I miss those fast forwarding(which are quite soothing) stuff in your udemy strategy course 😄
good tutorial ... and then add an EmptyObject ... this is another reason why I like the C# and Unity 3D game engine.
thx dude
Very Nice
Thanks to you , now i’ve understood the real reason why generics are important and why they are useful
If you want to see a practical use case here is my Grid using Generics th-cam.com/video/8jrAWtI8RXg/w-d-xo.html
@@CodeMonkeyUnity thank you
.... that was awesome
dude u should have 1 million subs
WOW thanks
Hey! I really enjoy your videos, I would like to learn programming but I really have no Idea where to start, what video would you recommend from your channel for someone n00b as me?
If you're a complete beginner in Unity watch these videos to get acquainted with the engine th-cam.com/play/PLzDRvYVwl53vxdAPq8OznBAdjf0eeiipT.html
After that try making a complete game like this th-cam.com/video/b5Wpni9KPik/w-d-xo.html
great vid~
Dude i love your tutorials. Could you make a game from stratch and record it for us.
I've made this one completely from scratch, it's my longest video! th-cam.com/video/b5Wpni9KPik/w-d-xo.html
You forgot to explain covariance and contravariance in generics. But still very nice video for beginners :)
actually, I am working on my friends project it on c# and I want to popup a website from that software but we don't know how to change website links from server or database, we just need to change website link daily
at 9:22, on line 36, I tried to give T a value of 2, "public T value = 2;" but got a type error. I'm confused by this because on line 19 I already set to . Is there a better way to do this?
When you make a class a generic you are saying that it will be compatible with just about any type.
You can use it with an but you can also use it with a
So you cannot define public T value = 2; because that would not compile if you created an instance of the class using anything other than int.
If you want specifically to store an int then define public int value; If you want to store the generic type that the class uses then do public T value;
Why do the action and func delegates have the "in" keyword before the generic type, while your custom delegates seem to work without the "in" keyword?
The in keyword simply forces those parameters to be inputs, if you don't add it then they can be inputs or outputs.
I only watched the first 4 minutes and then I got it. Short tutorials for people in a hurry
I felt like i gained a lot of knowledge when watching your videos but the next second i forget almost half of it, guess i just have to try them out myself and not just keep watching them again and again 😅
That's normal, programming isn't really about memorizing but rather about problem solving, and that's a skill that takes time to really learn. As long as you're actively paying attention then you are learning, even if it doesn't feel like it
Keep at it!
Thanks for the motivation bro
Ngl I didn't understand much but good video regardless
What part didn't you understand?
@@CodeMonkeyUnity I don't know anything about coding and such and watched this video by mistake. And after reading the comments , seems like many people found it helpful hence good video. Xd
at 6:40, is it possible to have TestMultiGenerics return t1 and t2? what should we use to replace void?
You want to return 2 values, one of T1 and one of T2?
If you're using C# 7 you can look into Tuples
private (T1, T2) TestMultiGenerics(T1 t1, T2 t2);
Or you can use out parameters
private void TestMultiGenerics(T1 t1, T2 t2, out T1 t1Result, out T2 t2Result);
@@CodeMonkeyUnity thanks so much for your detailed explanations! I find your videos extremely helpful and have subbed to your channel :)
I can tell that you are a kind of person that like to starring directly into the sun.
Nope, just someone whose eyes burn for trying to focus on tiny white letters if I use dark mode
@@CodeMonkeyUnity XD, you got a point
5:49 well it makes sens but i got one Question left, why we dont worke withe Objekt's? it seams identicle 4 me
Generics enforce the correct type. If you use objects then you can use one type for the first element and a completely different type for the second element which will break everything
nice
at 7:37, what does the "in T1, in T2 ..." mean?
also, at 7:49, what does the "out TResult" mean?
That's just the name for the Generic type, usually it starts with a T, so normally you have T1, T2 and if you have outputs normally they are named TResult
@@CodeMonkeyUnity I meant the 'in' word that is before T1 and T2
@@anonymoussloth6687 in is an input parameter, out means output
@@CodeMonkeyUnity I see. I am a bit new to C# and unity so was a bit confused. Also, the reason why i asked this is because i noticed that Action and Func used in and out but you didn't. Does that make any difference?
hi, i need help about music licence for my game background music, i just dont know where to buy. help help help.
Normally I get my music from AudioJungle
@@CodeMonkeyUnity thanks man. Each song has many license and price, which one is ok?I really can't pay 300 for each song right now😢
what if i want to make a function that can create an array and name it for example i pass "hello" 3 int
it make int hello array length 3
int[] hello = new int[3];
Creates a new int array with 3 elements named 'hello'
@@CodeMonkeyUnity yes but i need a function that does this i pass at the function the name the type and the lenght
Will be ur student from now.
BRO PLZZZ MAKE A TUTORIAL ON G DEVELOP . ... I JUST AM STARTING TO LEARNING TO CODE SO PLZZ
Thx for the vid. But generics are using a lot more memory, right?
Compared to what? A class with a hardcoded type? I guess there would be some overhead but it will be miniscule
THX!
Code Monkey Please make some tuts about bake simulation (such as particle) in unity!
I know that it works with an Array saving time and transform data of the particles but, to avoid crash during billions particle simulation
how to write code in unity?
You mean the new particle system? I haven't used it yet but it's definitely on my list!
@@CodeMonkeyUnity I mean the way it works! For instance, most studios use Houdini to simulate physically correct particle system and then exports it to any engines !
Here I want to use Unity to simulate entities with physical system and then use that cache data to work further!!!
I'm looking for a AI chess tutorial.. Is it as big as I world image it would be?
hey can you make a tutorial about perlin noise?
I have thought about doing some random map generation videos, could be interesting
Is it possible to add a generic class in a list?
Sure, if you define MyClass inside it you can make a List or T[]
What's the purpose of constraint? Isn't it just better to just explicitly say that instead of type T, you wanna receive a type of IEnemy instead?
If your constaints are so limited that only a single class is valid then sure at that point you might as well use that class directly. But the goal of generics is to allow your code to work with any number of classes, if that's not what you want then yea don't use generics.
can't you use the object var instead ?
On where? On the T? No, var is a dynamic type that the compiler converts to the inferred type, it's not a type in itself
I wanted to figure out how to use generic arrays but now I noticed the delegate keyword at the bottom of the screen for a second so I'm going to google what that does because I have no attention span
I made a video on delegates th-cam.com/video/3ZfwqWl-YI0/w-d-xo.html
Essentially they let you define a function signature so you can store a function in a field or pass it as a parameter.
Why don't we just use a interface as function parameter than using generic and then limiting it to an interface?
I mean interface and generics are kind of similar and I can't think much use cases for generics
2:51
I love the generics but don't know anything about unity!
4:30
6:34
So, what are the real usages of generics in Game Dev?
Check out the Grid System video to see a very practical example th-cam.com/video/8jrAWtI8RXg/w-d-xo.html
How do you do this keyboard sound? 😎
It's the sound of my actual keyboard
Lol
👏👏
internal interface IRepository : IDisposable where TEntity : Entity
^^
didnt understand this....
That interface uses a generic type which that type must extend Entity
For example you could use PlayerRepository : IRepository
And make sure Player : Entity
But not sure where you took that code from so check the source code for the specifics on what all those classes do
From simple to hard in 10min
While this is one of the best overviews on generics i've seen so far it still feels rushed. Many examples could really need some more time to let the viewer wrap their head around what you are doing and some could use a more practical implementation; like what other than int would you usa in Damage(T t)? An example where T would make sense to use than simply int would be helpful to make it both more understandable and memorable.
A float.
A very special Thanks from INDIA.....!!!! [ A little help required....!!! ]
Here is the thing: I request a tutorial for real-time level editor (i.e in-game level editing) for isometric 2d game
Please make a tutorial on it, so that one can make a game in which they can make levels that uses game prefabs and play & share their creation (levels) {if someone uses the technique.}
I needed an In-game Isometric type level editor for my game but I'm just a beginner and I don't know how to achieve it.
It would be great video for others too..!!!!!
whoever sees this like if you agree...!
and if (Author)
{
please give us the tutorial for it....
}
are you interested in vr in unity
I have to keep looking at these videos or else I will simply forget the concepts
The more you use them the more they will be stored in your memory, game development and programming is all about experience so keep at it!
@@CodeMonkeyUnity The only problem is that it is a full time job and even so, there are not enough hours in the day...learn, re-learn...on and on
Respect from Russia 🇷🇺🤝🇺🇲
What is the best programming language for game development?
Depends on the engine, Unity only supports C#
Help me
I thought it said genetics
Too much to my brain.