State of Kotlin - Droidcon NYC

@zmarkan @pusher

@zmarkan @pusher Kotlin is #2 

@zmarkan @pusher Kotlin is #2  most ❤ programming language  
(according to the StackOverﬂow survey)

@zmarkan @pusher

@zmarkan @pusher 35%   Android devs use Kotlin  (according to
Google)

@zmarkan @pusher Realtime APIs powering your… [ news, chat,  ride
sharing, crypto trading, sports,  ___ ]   …apps Pusher

@zmarkan @pusher Why #StateOfKotlin? Learning what’s in the Kotlin world
Sharing the ❤ with the community Surveys are fun! ✅

@zmarkan @pusher

@zmarkan @pusher •Demographics $% •Adoption & Learning & •Usage '
•Features •Tools & Ecosystem

@zmarkan @pusher responses received 2744

@zmarkan @pusher 13min14s average time to complete ⏱

@zmarkan @pusher Employment status

@zmarkan @pusher Developer experience

@zmarkan @pusher Kotlin usage

@zmarkan @pusher Kotliners per company

@zmarkan @pusher the state of   Kotlin

@zmarkan @pusher the state of   Kotlin “It’s like Java++”

@zmarkan @pusher Adoption through time Jake Wharton’s Kotlin doc

@zmarkan @pusher

@zmarkan @pusher Top learning   resources

@zmarkan @pusher Other programming languages PHP, Ruby, Scala, TypeScript, C,
Groovy, Go…

@zmarkan @pusher Android is eating the (Kotlin) World

@zmarkan @pusher How much Kotlin in your codebase? ☕

@zmarkan @pusher Fave features in the Kotlinverse

@zmarkan @pusher Fave features in the Kotlinverse Experimental features! ⚠

@zmarkan @pusher Fave features in the Kotlinverse “Doesn’t get in
the way   of geżting the job done”

@zmarkan @pusher 77%   use extension functions

@zmarkan @pusher Just for null checks   (in a Java
app) For clean code mostly. I make their scope as limited as possible unless it is a generic utility extension function. Almost for everything. Mostly internal extension functions to avoid global namespace bloating. lambda parameters for DSL-style builders. $% $%

@zmarkan @pusher 87%   migrated Java to Kotlin. From Java
to Kotlin…

@zmarkan @pusher 1

@zmarkan @pusher

@zmarkan @pusher …and back again. 25%   migrated back to
Java.

@zmarkan @pusher “[Automatic] migration doesn’t provide idiomatic Kotlin and puts
lots of null assertions"  ‼

@zmarkan @pusher reasons for reverting are both technical and organizational

@zmarkan @pusher 29%   have used coroutines

@zmarkan @pusher "Stopped using it because it’s experimental"  ⚗ 6

@zmarkan @pusher "Fully in production for a ﬁntech solution" 

@zmarkan @pusher 41%   have used a DSL

@zmarkan @pusher 10%   have wriżten a DSL

@zmarkan @pusher Testing! Custom data structures, typed JSON ML &
AI UI Declarations - Android & Java $% %$

@zmarkan @pusher 25%   used kotlin beyond Android/JVM

@zmarkan @pusher Kotlin beyond the JVM  

@zmarkan @pusher

@zmarkan @pusher K K

@zmarkan @pusher

@zmarkan @pusher Fave build tools ⚒

@zmarkan @pusher Koin, Arrow, Spek, KTX, Kluent, Ktor, Kotlin Android
Extensions, Dokka, Okio, Knarch, …

@zmarkan @pusher ( C ) → K

@zmarkan @pusher ( C ) → K “Mortal Kombat of
programming languages”

@zmarkan @pusher ﬁnd out more at   pusher.com/state-of-kotlin

@zmarkan @pusher ﬁnd out more at   pusher.com/state-of-kotlin More graphs!
RAW data!

@zmarkan @pusher Want to shape the next State of Kotlin? 
Let me know your suggestions!   What do you want to ask?

@zmarkan @pusher Zan Markan    @zmarkan  [email protected]  pusher.com    slides:
bit.ly/state-of-kt-nyc

@zmarkan @pusher Zan Markan    @zmarkan  [email protected]  pusher.com    slides:
bit.ly/state-of-kt- We’re hiring BTW

@zmarkan @pusher Resources JW's whitepaper from Square: docs.google.com/document/d/ 1ReS3ep- hjxWA8kZi0YqDbEhCqTt29hG8P44aA9W0DM8
Kotlin Future Features survey: blog.jetbrains.com/kotlin/2017/06/ kotlin-future-features-survey-results StackOvervlow Survey: insights.stackoverﬂow.com/survey/2018 Testing robots: https://jakewharton.com/testing-robots/ Announcing Okio 2: https://medium.com/square-corner-blog/okio-2-6f6c35149525 Droidcon NYC app: https://github.com/touchlab/DroidconKotlin/ KeynotedDex (Kotlin frontend & backend): https://github.com/wiyarmir/keynotedex

State of Kotlin - Droidcon NYC

State of Kotlin - Droidcon NYC

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