janvladimirmostert: I also find another talk by him:

Nice!

he also have an o’reilly course hadihariri.com/2016/11/01/oreilly-kotlin-course/ here, but it’s quite pricy and I can’t afford it now…

I’m learning new stuff in @hhariri ‘s videos even though I’ve been using Kotlin since version 1.0.0 Doing 100.bd is an awesome feature I didn’t know about, also didn’t know you could call copy without specifying anything

quite true. I am using kotlin for almost one year, and still can learn from his talk. That’s why I search his talk on youtube today