Anyone know of good online tutorials for Kotlin? I learned Swift for iOS development and customers have been asking for an Android version of my app. Sounds like Kotlin would be a good second language to learn.
The Kotlin plugin (for Android Studio; starting from 3.0 presumably built-in) allows for converting Java code to Kotlin automatically. Obviously the outcome is not necessarily idiomatic Kotlin, just the most straightforward equivalent - but still, it's a very quick way of getting up to speed with the syntax.
1 - skim the language documentation (depending on your familiarity with java, this will be more or less easy)
2 - download intellij, clone the kotlin koans repo and do these exercices.
After finishing the koans, you will have a good grasp at kotlin's basics.