Hello everyone! I have released kotlin-csv@1.0.0. This major version update includes Kotlin/JS support. As always any feedback is welcomed 😄

Hello folks, I've written an article focused on some of the points that have been on my mind lately regarding software engineering https://funkymuse.dev/posts/software_engineering_2021/

Morning 🙂 A deep dive into how suspension and continuations work under the hood. Coroutines under the hood by @marcinmoskala 👇 https://kt.academy/article/cc-under-the-hood

Random thing I threw together: CSV -> data class generator VSCode extension. Very rudimentary and probably rough around the edges, but maybe useful if anyone works with CSVs often. 'tis my very first VSCode extension, so any comments or thoughts would be much appreciated!

We are organising the following workshops in October: • Kotlin Coroutines - 2-day workshop for 280 EUR, online, 9-17 CET • Effective Kotlin - 3-day workshop concentrated on idiomatic Kotlin use, advanced features and best practices, for 400 EUR, online, 9-17 CET There are still some places left 😉

Wrote an article about lessons we learned about sharing code across our Android/iOS/web clients for Stripe's Increment Magazine. Not exclusively Kotlin, but definitely did my best to portray KMP in a positive light 🙂 https://increment.com/mobile/write-once-run-anywhere/

What are value classes, how to use and inline them? Consider using inline value classes by @marcinmoskala https://kt.academy/article/ek-value-classes

Something most people have enabled, I presume, but in case you didn't know: IntelliJ can nicely display type hints for Kotlin variables such that one can stop the guessing (or hovering) game to figure out what type a variable is of. In this YouTube Short, I'll quickly show how to enable that: I'd be happy if you'd share it with people that might benefit from it as well 🙂

Hello everyone! We developed a plugin for the Kotlin compiler that leverages the flows of the standard reflection approach and can find classes, objects or functions by some conditions in compile-time. The current latest version is ready and stable! Two ways of using the plugin are supported: by limited DSL (searching of classes and objects by supertypes and annotations; and searching of functions by signature and annotations) and by extended DSL (searching of classes and objects by custom condition and supertype; and searching of functions by custom condition and signature). Since we use IR generation, the plugin can be used by all platforms (JVM, Nativa and JavaScript). Although currently, we can analyze only kt files. Additionally, the plugin uses a code generation approach in limited DSL to support compile-time reflection in libraries. It means, if you have a library that uses Reflekt and you call something from this library in your project, all Reflekt calls will be in the compile-time. Currently we support 1.5.30, 1.5.21, 1.5.20, 1.5.10, 1.5.0 Kotlin versions. Unfortunately, we do not support incremental compilation yet, but in the next release, we will be! We will be happy if the plugin would be helpful for you! If you are interested in this project and have some ideas for improving the plugin, please don’t hesitate to contact me! To discuss it see #compiler channel

What is the difference between list and sequence processing, and when each should be preferred? Prefer Sequence for big collections with more than one processing step by @marcinmoskala https://kt.academy/article/ek-sequence

I have recently started working on a Kotlin/JVM DSL for Apache Cassandra. I will be releasing it as part of a greater project, under the Apache 2.0 license. I'm curious if there's interest from the community, I don't think Cassandra is very popular with Kotlin developers?

Just published my first article, I hope you like it! https://blog.louiscad.com/how-to-return-2-values-with-0-allocation-in-kotlin

Fun

fact: I took over 50 photos before I settled for the cover picture blob upside down

Arrow 1.0.0 is out! 🎉 https://twitter.com/arrow_kt/status/1439971197484109834

I produced a new episode of my YouTube series Idiomatic Kotlin. This one is about the Result mechanism (

Result<T>

) of Kotlin! I upgraded my production quality a lot and produced a concise, to the point video! There's an auxiliary appendix video available in which I am going into more detail with a hand-made example. Here's the new episode: Let me know what you think 👍

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How is associateBy useful to improve the performance of finding elements? Consider associating elements to a map by @marcinmoskala 👇 https://kt.academy/article/ek-associate

Hi all! We're organizing the Kotlin Dev Day conference in Amsterdam (hybrid) and we're looking for speakers! The Call-for-Papers is open until the 7th of October. @Sebastian Aigner from JB is doing the keynote and we have some other experts confirmed as well. So if you want to take the stage and talk about Kotlin, this is your time to shine 🙂 Event info: https://kotlindevday.com Submit your talk: https://kotlindevday.com/cfp

kotlinx.serialization 1.3 Released: Experimental IO Stream-Based JSON Serialization, Fine-Grained Defaults Control, and More A new version of the Kotlin serialization library – 1.3.0 – is now available following the release of Kotlin 1.5.30. It mainly focuses on broadening the JSON serialization capabilities. Here are the most noticeable changes: Serializing and deserializing Java IO stream. You can now read and write JSON directly to network streams or files. More […]

https://link.medium.com/Ys8QmOVWUjb After reading this article I feel Kotlin should have supported DI natively in the language. Any thoughts?

Hey guys, I've been researching on

invokedynamic

and Java's compilation strategy for lambdas. As far as I'm aware, Kotlin only supports the Java-like compilation strategy for Single Abstract Method (functional) Interfaces, not for plain Kotlin lambdas. According to the what's new this is still experimental for plain Kotlin lambdas. I have a few questions 1. Why are Kotlin lambdas not implemented as SAM interfaces? Is this to allow for reflection? 2. Why do SAM interfaces not have to worry about serializability the way Kotlin lambdas do? I would really appreciate some input regarding this. Thanks.

Everything you need to know about the exception handling mechanism in Kotlin Coroutines. Written by @marcinmoskala https://kt.academy/article/cc-exception-handling

I am creating the Klogging logging library in Kotlin. There is also an SLF4J binding and a Spring Boot Starter. Currently it supports Splunk, Graylog and Seq destinations directly. Let me know if you try it and if you find it useful (or not!).

TIL: How to write Exception in Kotlin (opinionated) 1. Kotlin recommends to use exception catch operator e.g:

Flow<T>.catch

,

runCatching {}

etc 2. Dual-use API introduced for convenient e.g:

getOrNull

,

getOrDefault

etc 3. Use preconditions and compile check when writing public API/method https://medium.com/sampingan-tech/kotlin-getting-to-knows-with-exceptions-564f8b2bc3c

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I am writing this just to appreciate all the hard work that the Kotlin team did to create the impeccable documentation. It feels like home. It has almost everything a developer may need. I have never come across anything like that in the past. So, kudos to them who made it happen. K K (probably it's not the most appropriate channel to say this, but couldn't find any better alternative)

Results of the Kotlin Multiplatform Survey Q1-Q2 2021 The Kotlin team has always relied on feedback from the community to make decisions about the future of the technology. You will always be the people who best know how to make Kotlin even more enjoyable to work with! That’s why a year ago we started a Kotlin Multiplatform Survey program to collect your feedback […]