https://t.me/kotlin_lib


https://kotlinlang.org/docs/resources.html
https://github.com/tunjos/lean-kotlin

https://www.kotlinprimer.com/introduction/maintainability/

2025
https://hackr.io/blog/how-to-learn-kotlin
https://www.reddit.com/r/Kotlin/comments/1nf5cqt/checkout_kata_in_kotlin_part_1_tdd
    https://www.youtube.com/playlist?list=PL1ssMPpyqochy79wllIMVsSvg_IfbYr1Z
    https://github.com/dmcg/checkout-kata
    http://codekata.com/kata/kata09-back-to-the-checkout/
2022
https://www.techrepublic.com/article/programming-languages-how-to-learn-kotlin-with-these-resources-for-developers/
2018
https://superkotlin.com/kotlin-mega-tutorial/
2017
Being More Productive With Kotlin 0:00 of 36:23
    https://www.youtube.com/watch?v=PGcKgtlmLvA
DerekBanas - Kotlin Tutorial 0:00 of 1:26:23
    https://www.youtube.com/watch?v=H_oGi8uuDpA
    https://www.newthinktank.com/2017/05/kotlin-tutorial/
Devoxx - 10 Kotlin Tricks in 10 ish minutes by Jake Wharton 0:00 of 17:23
    https://www.youtube.com/watch?v=0sPzDwS55wM
2016
VoxxedDaysTicino - You can do better with Kotlin by Svetlana Isakova 0:00 of 51:29
    https://www.youtube.com/watch?v=bVuhlusXdZ4
Keks - KT in Real Projects 0:00 of 1:30:36
    https://www.youtube.com/watch?v=lpPbCWpBM3I
https://www.youtube.com/watch?v=klakgWp1KWg
https://kotlin.link/articles/Scala-vs-Kotlin.html
????
https://kotlin.link/
https://superkotlin.com/resources-learn-kotlin/
    examples ...
https://blog.kotlin-academy.com/error-handling-the-kotlin-way-7e2fb31b1aff
https://fabiomsr.github.io/from-java-to-kotlin/
https://play.kotlinlang.org/koans/overview
https://github.com/amitshekhariitbhu/from-java-to-kotlin
https://blog.kotlin-academy.com/

cheatsheet
https://blog.kotlin-academy.com/kotlin-cheat-sheet-1137588c75a

android
https://developer.android.com/kotlin
https://developer.android.com/samples/?language=kotlin
https://www.youtube.com/watch?v=1LPWp3EntWc