Kotlin Newbie to Pro - GENERICS - Part 29 

just finished the playlist. Thank you so much for this! I am in a beginner college course for mobile app dev and they skimmed over kotlin and threw us into android studio with Compose. I have been soo lost but man, this helped me out a lot! I can't wait to start your Compose playlist.

As an android developer junior, I needed a refresh course on the Kotlin language, this was just the playlist I needed, i just finished it in accelerated within one full day and it was perfect, you explain every notion very well and the exercises are great, now I'm confident to start new android projects in kotlin, thanks a lot for your work 👋

Just finished the whole Kotlin tutorial. Now I'm heading for the Android videos. Thank you so much for the great work!!!

After finishing the playlist, I gotta say one this. THIS MAN IS A LEGEND 👑

I finished the entire playlist. Man this was awesome. You cleared all my concepts. LOVE YAAAAAAAAAAAA!

For last example, every Type (T) that extend Number can be converted to Double without losing its precision value. & then we can convert the sum back to Type (T) @Suppress("UNCHECKED_CAST") fun List.customSum(filter: (T) -> Boolean): T { var sum = 0.0 for (item in this) { if (filter(item)) { sum += item.toDouble() } } return sum as T }

Hey, Philipp! Old video, I know, but I hope you get this comment anyway, because the amount of gratitude I feel to you at this moment is simply immeasurable. I'm not exactly new to Kotlin, but neither do I have a lot of coding experience in it. This morning I was building a repository for reading from and writing to DataStore, and, seeing as I'd never used generics in Kotlin before, I was struggling with creating just two general functions to get the job done. I know to you, and many experienced programmers here, this might seem trivial, but I just kept failing, and kept trying, because I KNEW there HAS to be a way more refined than writing a dozen of functions for writing and reading every single type. As embarrassed as I feel even writing it in this forum, I have to tell you that suddenly I remembered your Kotlin playlist, and I only had to get to 3:28 when it hit me like a lightening, and now, thanks to this video of yours from 4 years ago, I have that elusive finesse I've been desperately searching for. Thank you. Just thank you. From a happy newbie who's so-so proud of her first two generic type functions.

Nice video. [Minor] For the generics customSum() you can also take the initial sum value as input parameter avoiding the need to check for class types to decide it.

Great representation skill. I was expecting covariance and contravariant with in and out keyword. Expecting next video would be about that.

OMG I MADE IT THROUGH THE WHOLE COURSE! YOU DA MAN LACKNER! I hope you have a good day, bye-bye!

Thanks for this amazing serie, it was really clear and I enjoyed learning Kotlin through your videos !

Great playlist, came here after seeing you on Traversy media, really appreciate your videos. keep it up! :)

Thanks a lot, Philipp! You are a very good teacher/instructor! Thanks for all you give.

One thing i love about your presentation is you always call out keyboard shortcuts. I have seen developers with 5 years experience still using manual mouse pointer for everything

Great Tutorial Bro! I have watched all your videos from the beginning till the end. Thank you Philipp because of you I already know the basics of Kotlin!

Just finished the whole series. Thank you so much Philipp for the hard work! Much appreciated

Hi, I'm learning Kotlin and these videos are great! I just wanted to point out one confusing thing to me while I was watching. Why is it possible to call List.customFilter on a List, List, etc..? Answer: It's because Kotlin has declaration-site variance and the definition of generic List is: public interface List : Collection { ... }. The "out E" makes it covariant. e.g. List is a subtype of List. And we can do this because List is read-only

Thanks for great playlist. Now I'm good with kotlin basics and I'm heading to Kotlin Android tutorials. Keep continuing and wish you all the best .Love from India❤

Nice 👍👍. Generics can be tricky.

Kotlin is super powerful. Thank you Philipp for these awesome tutorials on Kotlin :)

finally completed kotlin now can start android dev with kotlin let's see how it goes thank you for this amazing course

finished 😀 learned a good amt, lambda functions are a bit tricky though but I have confidence to do my own projects now

Wow Philipp is soo good at explaining, well done bro keep going your the best android mentor

Holy heck.. This was quite the ride. I finished the playlist.😁

It was really awesome. Thank you very much.

Really awsome! I did everyone of them. Now, move on to your android list.

Thank you so much Philipp. You are amazing.

Kotlin Generics is in itself a big topic. At the end of the video, you stumbled upon a topic of generalizing the sum counter. It would have been a very good video if that generic code was complete. :(

Awesome Playlist. Thanks Philipp

Just finished the whole playlist. The best I can do is liked all the videos on the playlist and subscribe as a payment for the incredible free content.

Pair - not Tuple! Your videos are perfect anyway

Thanks for the playlist, was fun watching and doing exercises. I finished the entire playlist. Man this was awesome.

Thankyou so much for this series, looking forward to your android fundamentals series now!

Thank you for such a great playlist! I wish you all the best in your life bro🤍. Keep teaching us and I am sure your efforts will pay off!

Thank you I watched all of your Kotlin new to pro. Well done

Thanks my man! Super helpful. On to your compose tutorials now…

Thank you so much for this course it was very helpful, I think I'm ready to get deeper and learn more 😄

Well done man i just finished your playlist wish you all the best

Thanks for the playlist, was fun watching and doing exercises. Hope the android is gonna be this fun too!

Great playlist for learning Kotlin basics

Great videos man!! Excelent explanations! Keep it up!!

Thanks for making generics easy to understand :)

Made it through all 29 vids :D

Thanks Philipp Lackner

Great 👍👍👍 man, keep the hard working, you finally made me understand it

Thank you very much for this amazing playlist!

Thanks a lot for the job you did! Which playlist would you recommend as a continuation in order to become an Android developer?

Love the vids, Philipp! Quick question -- When running the printTypes() function, the console print is telling me that the Kotlin reflection is not available. Is this a versioning issue or something? I am using IntelliJ IDEA 2023.3.3

Thanks man!

SOOO Cooool!!!!Will there be new videos about Kotlin?)

awesome tutorials, with details which is great ⭐⭐⭐⭐⭐ Thanks man

Thanks!

Amazing tutorial bro, Thank you for a such amazing contents

You are awesome man. Thank you a lot.❤️

Thanks Just Become Newbie to Pro

I am pro now, thanks.

Nice explanation. Thanks a lot!!!

Great course man!

the only reason i chose this tutorial over the others because it was 4k lol

Thank You Brother.

it shows "java.lang.Integers (Kotlin reflection is not available)" when i run the code, any solution?

Thank you sir 🤘🏿

is it okay to just have knowledge of generics , or should i practice it? kotlin null always irritates me

I am having trouble and I know that I am late to the party but I get errors that look like "The type of second is class java.lang.String (Kotlin reflection is not available)". I've tried to get reflection to work... has this been removed from later version of the Kotlin standard library? I can get the java type with ${second::class.java}.

Covariance and Contravariance you did not talk about it?

Great stuff

Hey Philipp. I have a question which playlist of yours should i follow if i want to start making android apps?

Thanks, very helpful content. what should be the next step after mastering the Kotlin basics? I would really apperciate if you recommend the next palylist. Thanks.

could have added data classes, enums and maps, otherwise great course

this is complete playlist for Kortlin???

Easy stuff, thanks

hello i have a question for you how are you In Kotlin it is necessary to subtract the greater of 3 numbers using the generic function. I have the> = sign not working

Hello, I need help, where do i go from here especially on this channel?

how could I get the size of any nbject of any Type in Kotlin?

Need a tutorial on in and out keyword.

In the customSum function... can't we intialize sum with value (T - T)??

sorry what's next video

best !!!!!

Nice video thanks, where can I find the code in the video.

What about interfaces , are they absent in kotlin ??

Hi , I really enjoyed watching this playlist. Thanks a lot :)