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This is a demo of very basic kotin stuff

Kotlin is a language created by Jetbrains (intellij geeks). A few years ago as it really grew in popularity, a new groupcalled the Kotlin Foundation was created to manage the language. A bit after Google announced that kotlin was officiallya supported first class language for Android development. Spring announced around the same time that they added explicitsupport for kotlin in spring boot 2 and spring 5 for functional programming (and included amongst other things a newKotlin DSL for it's endpoints). Kotlin is released under the Apache 2 license

Some interersting links

• Evolution of kotlin, including the philosophy of kotlin's goals
• General FAQ

This was a design goal from the start. This makes it very easy to start mixing kotlin and java, simply add the dependency togradle/maven. A very common starting point for adding Kotlin to a project is replacing DTOs and Pojos, making them actuallyreadable (getter/setter/toString/equals/hashcode/copy are autogenerated, I will show this in a bit)

#Sources and various linksSome places I got ideas of things to talk about##Learning stuff

• Main kotlin site
• Kotlin doc home, with very good guides
• Play with Kotlin online without installing the dev enviornment
• Reference Docs
• Good overview on difference between collection stream and sequence

• Kotlin Tutorials Check out the getting started. It will help you configure your environment
• Kotlin Koans
• Online web IDE tutorial

• Article on key kotlin advantages over java
• Baeldog has a good set of how-to's with kotlin
• Spring and kotlin
• Simple tutorial using spring boot and kotlin

Intellij has native support for Kotlin. Eclipse has a plugin that I've read is pretty good but have not tried it. I've read thatVisual Studio has good support, I assume it wraps around the CLI stuff.

• Ktor - Async webserver andanother guide
• Spek - testing framework supports specification style (Jasmine/RSpec) andgherkin (cucumber)data driven test.Baeldog article on spek
• KotlinLang list of some popular frameworks and libs

• Arrow functional companion to the kotlin stardard lib has several topics including patterns, typeclasses, etc

##Some usage stats

• Jetbrains tracking usages. Note non-android dev is quite high.Breakdown on popular tools, and frameworks for kotlin. Includes a chart showing a breakdown of what platform kotlin is used to develop software for. I tookthis as the intended runtime. Android obviously was the 1st one but linux is very high