"Is String a type or a class?". The common answer is "Both because every class is a type". It is not really true.

this is also very confusing, it implies that String is not a type… but it is

@cedric yes we have Free, FreeApplicative, Cofree and many others in Kategory already and usable. Our type checked docs in Kategory are built with

ank

which is a markdown snippet evaluator based on

Free

: https://github.com/kategory/kategory/blob/master/ank-core/src/main/kotlin/io/kategory/ank/algebra.kt https://github.com/kategory/kategory/blob/master/ank-core/src/main/kotlin/io/kategory/ank/interpreter.kt

Hey, fellow Kotliners, I have published a new article to hackernoon: https://hackernoon.com/how-kotlin-calamity-devours-your-java-apps-like-cancer-f3ce9500a028 (sorry for too powerful title in advance ;) ) If you like what you see, please give me some medium claps (you can do up to 50) and share it on social media! Feedback is welcome, as well.

Here’s an article I wrote about covariance in Kotlin. If you’ve got any technical feedback after reading it, just let me know! https://typealias.com/concepts/covariance/

I wrote my own Chrome extension to highlight new comments in reddit and HN for Chrome and the one reason why I haven't switched to Firefox is because I need to port that extension. Now writing it in Kotlin makes it much more appealing

My presentation from DevFest Siberia about Superpowers of Kotlin delegation. Enjoy 😉 https://blog.kotlin-academy.com/superpowers-of-kotlin-delegation-e6bd9ff8026c

🙂

cross-post from #scripting I just put out BETA of a bunch of libs around, I'll start to do docs and samples now but worked out all the kinks. * Elasticsearch-lang-kotlin: Kotlin text scripting in Elasticsearch, and also the ability to send Kotlin Lambdas as scripts as well. Why give up syntax highlighting and help from our IDE's! -- https://github.com/kohesive/elasticsearch-lang-kotlin * Cuarentena: secure scripting (validate script or binary lambda against a whitelist of allowed accesses down to method level, matching Painless scripting rules from Elasticsearch but can apply elsewhere) -- https://github.com/kohesive/cuarentena * Chillambda: convert a lambda into a script (base64 encoded version that you can send somewhere to run using Cuarentena to validate the security rules are not violated, also handles safe ser/deser of the lambda to prevent attacks there as well) -- https://github.com/kohesive/chillambda * Keplin: shrunk down just to be less things, some slightly easier way of using Kotlin REPLs and scripting, but I would like to deprecate more here and just end up flat on the core from Kotlin. So expect this to shrink, and only be secure scripting hooks into Kotlin scripting with Cuarentena -- https://github.com/kohesive/keplin These are finally working and distributable, but need time to bake, samples written, docs, ... so be gentle to them. From here, I would like to get Kotlin scripting into other engines that make sense. But I'll let the details work out with this set first to find the kinks, close any holes, etc. I also have to update to other versions of Elasticsearch, including big changes in 6.x series.

I wrote a blog post about using Kotlin and Spring Boot 2.0 to write a reactive service https://todd.ginsberg.com/post/springboot2-reactive-kotlin/

http://4comprehension.com/kotlin-type-inference-puzzler/ - took me way more than necessary to figure out this one in a real project 🙂

I wrote an article concerning Kotlin’s

Nothing

type https://proandroiddev.com/kotlins-nothing-type-946de7d464fb

Finally, the article is ready 😄 Architecture for Multiplatform development in Kotlin with the fully featured example. Enjoy 🙂 https://blog.kotlin-academy.com/architecture-for-multiplatform-development-in-kotlin-cc770f4abdfd

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Helpful in multiplatorm projects, but also for Android and iOS: Images sharing in Gradle multiprojects https://blog.kotlin-academy.com/images-sharing-in-gradle-multiprojects-aba5e6bc8b1a