Kotlin - Zac Sweers

Zac Sweers

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Kotlin

A collection of 13 posts

An AI-generated image of a bunch of happy purple elephants sitting around a campfire in a forest.

Keeping Android and Kotlin Healthy in a Post-Twitter World

As the developer communities scatter from Twitter, let's learn from mistakes.

Improving Your Gradle Workflow by Not Auto-reloading Build Files

IntelliJ and Android Studio try to constantly reload Gradle projects by default, disabling that behavior can improve your workflow.

A beluga whale, which is white.

Optimizing Your Kotlin Build

Kotlin build times are often slow, this is a laundry list of common issues and what you can or can't do about them.

Kapt's Hidden Test Costs

TL;DR Kapt will run on your test builds even if you didn't ask it to.

Dagger Party Tricks

Dagger Party Tricks: Extension Functions

Extension functions in Dagger for fun and profit.

It's Nothing

Nothing is a special type in Kotlin often used for errors. Is that all it's useful for though?

A Closer Look At Moshi 1.9

Moshi 1.9 is here! It's been in the oven for a year and excited to have it out there. This post takes a closer look at its changes.

@JvmDefault: More Useful Than You Think

@JvmDefault: More Useful Than You Think

@JvmDefault is an annotation + compiler flag in Kotlin to enable using Java 8 default interface methods. It does more than it leads on though! This post explores some other bytecode optimizations you can gain with it as well as some hidden behaviors you should be aware of.

API Design Case Studies: Intersection Types

API Design Case Studies: Intersection Types

My team recently cleaned up an API in an internal storage library. While it’s a simple case, it covers a couple interesting language tools and tradeoffs. Let’s dig in! The starting pointIt’s a function called enumStoreKeys that returns a Set of StoreKey enums for a given classKey.

Announcing AutoDispose 1.0

Announcing AutoDispose 1.0

About two years ago, just after migrating my CatchUp [https://github.com/hzsweers/CatchUp] side project to RxJava 2, I started a branch called “boundObservers” to try out an idea I had for RxLifecycle-style automatic disposal of streams. I rewrote it from scratch a few times after, and a couple

Moshi Kotlin Code Gen: An Open Source Story

For context — see the previous post [https://www.zacsweers.dev/exploring-moshis-kotlin-code-gen/] I wrote about Moshi [https://github.com/square/moshi]’s new Kotlin code gen support. This blog is a somewhat technical, mostly personal account of how it came to be. Origins Moshi’s Kotlin code gen has an interesting

Exploring Moshi’s Kotlin Code Gen

Moshi’s namesake: a Frenchie named MoshiIntroduction Moshi 1.6 [https://github.com/square/moshi/blob/master/CHANGELOG.md#version-160] was recently released with a brand new Kotlin code gen artifact. It’s an alternative to the existing reflection-based artifact, and in my opinion one of the most interesting recent

Catching Up on CatchUp: A Dagger-powered Plugin System

For context — see the introduction post [https://www.zacsweers.dev/catching-up-on-catchup-introduction/]. This is part of a series of technical deep dives into different things I’ve learned along the way. This post assumes some prior knowledge of Dagger [https://github.com/google/dagger]. In CatchUp [https://github.com/ZacSweers/CatchUp]