8 min read Beginner
Kotlin testing has a problem that gets worse the more successful your project becomes.
Posts tagged kotlin
Kotlin Multiplatform
10 min read Advanced
The Default Hierarchy Template in KMP projects is a great way to reduce boilerplate code and start working quickly. However, it came with an unexpected…
Kotlin Multiplatform
KMP 102 · Part 5
KMP-102 - Modularization in KMP
6 min read Intermediate
In the last article we dug into the quirks of code exported to Objective-C headers, along with the best practices for what to export.
Kotlin Multiplatform
KMP 102 · Part 4
KMP-102 - Optimizing Kotlin for Obj-C/Swift
6 min read Intermediate
In the last post, we learned how to use Kotlin code in Swift. We covered a few techniques to improve the code exported to Swift, and how annotations like @HiddenFromObjC and @HidesFromObjC control the visibility of code in Swift.
Kotlin Multiplatform
KMP 102 · Part 3
KMP-102 - Using Kotlin Code in Swift
8 min read Intermediate
In the last post, we learned how to create an XCFramework from Kotlin code and explored some characteristics of the generated build types.
Kotlin Multiplatform
KMP 102 · Part 2
KMP-102 - Characteristics of the XCFramework in KMP
10 min read Intermediate
In the previous post, we learned how Kotlin/Native exports a collection of .frameworks in the XCFramework format.
Kotlin Multiplatform
KMP 102 · Part 1
KMP-102 - XCFramework for KMP Devs
4 min read Intermediate
Welcome to the KMP-102 series. We dig deeper into Kotlin Multiplatform concepts, learning more about how to integrate our Kotlin code into iOS and beyond.
Kotlin
Kotlin Koans BR · Part 12
Kotlin Koans BR: Import alias
2 min read Beginner
When importing a class or function, you can give it a different name by adding as NewName after the import directive. This can be useful when…
Kotlin
Kotlin Koans BR · Part 13
Kotlin Koans BR: Extension functions and properties
4 min read Beginner
Implement the extension functions Int.r() and Pair.r() so they convert an Int and a Pair into a RationalNumber.
Kotlin
Kotlin Koans BR · Part 2
Kotlin Koans BR: Named arguments
2 min read Beginner
Make the joinOptions() function return the list in JSON format (for example, [a, b, c]) by specifying only two arguments.
Kotlin
Kotlin Koans BR · Part 3
Kotlin Koans BR: Default arguments
4 min read Beginner
Imagine you have several overloads of foo() in your favorite language. You can replace them all with a single function in Kotlin.
Kotlin
Kotlin Koans BR · Part 9
Kotlin Koans BR: Data Classes
9 min read Beginner
Rewrite the following code in Kotlin, then add the data modifier. A beginner-friendly look at Kotlin classes and data classes.
Kotlin
Kotlin Koans BR · Part 11
Kotlin Koans BR: Sealed Classes
12 min read Beginner
Reuse your solution from the previous task, but replace the interface with a sealed interface. That way you no longer need the else branch in the when expression.
Kotlin
Kotlin Koans BR · Part 8
Kotlin Koans BR: Lambdas
3 min read Beginner
Pass a lambda to the any function to check whether the collection contains an even number.
Kotlin
Kotlin Koans BR · Part 5
Kotlin Koans BR: String Templates
2 min read Beginner
The pattern below matches a date in the format 13.06.1992 (two digits, a dot, two digits, a dot, four digits):
Kotlin
Kotlin Koans BR · Part 1
Kotlin Koans BR: Hello, world!
5 min read Beginner
Change the code so that the start function returns the string "OK".
Kotlin
Kotlin Koans BR · Part 4
Kotlin Koans BR: Triple-quoted strings
2 min read Beginner
Swap the trimIndent call for trimMargin, setting # as the prefix value, so the resulting string no longer contains the prefix character.
Kotlin
Kotlin Koans BR · Part 10
Kotlin Koans BR: Smart casts
7 min read Beginner
Rewrite the given code using Kotlin smart casts and the when expression.
Kotlin
Kotlin Koans BR · Part 7
Kotlin Koans BR: The "nothing" type (Nothing)
2 min read Beginner
Specify the Nothing return type for the failWithWrongAge function.
Kotlin
Kotlin Koans BR · Part 6
Kotlin Koans BR: Nullable types
5 min read Beginner
Rewrite the following code so that it uses only a single if expression, and learn how Kotlin handles nullable types safely.
Kotlin Multiplatform
7 min read Beginner
In previous articles, we established a foundation in Kotlin Multiplatform (KMP) and how it compiles to multiple platforms.
Kotlin Multiplatform
8 min read Beginner
Over the last few articles, we dug into the inner workings of Kotlin Multiplatform: its paradigm, the compiler architecture, the source sets, the development environment, building and running a sample project, and the essential role of Gradle.
Kotlin Multiplatform
KMP 101 · Part 6
KMP 101: Learning how Gradle is used in Kotlin Multiplatform
9 min read Beginner
In the last article, we created a project using the KMP Wizard and, with little effort, ran our app on Android, iOS, and Desktop devices.
Kotlin Multiplatform
3 min read Beginner
Over the last few articles we covered key KMP concepts, from the multiplatform paradigm to setting up the environment.
Kotlin Multiplatform
12 min read Beginner
Software development is a complex process that demands not only skill and creativity, but also a well-configured development environment.
Kotlin Multiplatform
KMP 101 · Part 3
KMP 101: Mastering the Principles of Source Sets
8 min read Beginner
In the last article (🔗 KMP 101: Understanding How Kotlin Compiles for Multiple Platforms), we learned about the frontend, IR, and backend of the Kotlin compiler.
Kotlin Multiplatform
KMP 101 · Part 2
KMP 101: Understanding How Kotlin Compiles to Multiple Platforms
4 min read Beginner
In the last post (🔗 KMP 101: An Introduction to the multiplatform paradigm), we explored the multiplatform paradigm and how KMP stands out in the ecosystem.
Kotlin Multiplatform
KMP 101 · Part 1
KMP 101: An introduction to the multiplatform paradigm
10 min read Beginner
We use a wide range of apps every day on phones, watches, TVs, and computers, all part of a broad digital ecosystem.
Android
Android Plataforma · Part 17
Android Plataforma - Part 0: Introducing the Series
3 min read Intermediate
Android development is a constant stream of new things: new devices, SDK updates, and an endless variety of libraries and tools that ship every single day.
Android
Android Plataforma · Part 1
Android Plataforma - Part 1: Modularization
2 min read Intermediate
Efficiency matters in modern software projects. This article covers modularization in Kotlin/Android projects, the vital role Gradle plays in speeding up builds, and the challenges of managing multiple modules.
Android
Android Plataforma · Part 10
Android Plataforma - Part 10: Customizing the modules
6 min read Intermediate
In the last article we explored CommonsExtension to remove duplication from our configuration.
Android
Android Plataforma · Part 11
Android Plataforma - Part 11: Building a DSL to customize the new options
3 min read Intermediate
In the previous article, we parameterized the arguments of applyAndroidApp() and appyAndroidLibary() with models.
Android
Android Plataforma · Part 12
Android Plataforma - Part 12: Optimizing build time for Android libraries
5 min read Intermediate
🌱 Branch: 12/improving-android-library-build-time 🔗 Repository:...
Android
Android Plataforma · Part 13
Android Plataforma - Part 13: Including "pure JVM" modules
4 min read Intermediate
In the last article we sped up Android module builds by turning off several Android Gradle Plugin (AGP) features.
Android
Android Plataforma · Part 14
Android Plataforma - Part 14: Opting in to experimental Kotlin compiler features
3 min read Intermediate
In the last article we extended our platform with the ability to declare JVM modules.
Android
Android Plataforma · Part 15
Android Plataforma - Part 15: Taking care of your code with Detekt, ktlint and Spotless
6 min read Intermediate
In the last article we covered how our platform lets different modules opt into experimental features.
Android
Android Plataforma · Part 16
Android Plataforma - Part 16: Final thoughts
2 min read Intermediate
Over the last articles, we built a platform from scratch, learning and applying several concepts with the goal of making multi-module Kotlin apps more flexible and scalable.
Android
Android Plataforma · Part 2
Android Plataforma - Part 2: Starting the Project
1 min read Intermediate
In this post we explore a starter project, understand the challenges of maintaining build.gradle.kts files, and discover how Gradle Composite Builds can help along the way.
Android
Android Plataforma · Part 3
Android Plataforma - Part 3: Sharing Gradle Scripts
3 min read Intermediate
In the previous article, we understood the challenges a multi-module project brings: maintaining and reusing Gradle files. Let us get a better grasp on how to solve this problem by looking at two concepts: buildSrc and Composite Builds.
Android
Android Plataforma · Part 4
Android Plataforma - Part 4: Composite Build
4 min read Intermediate
In the previous articles we saw why modularity matters and why Composite Builds are the right choice for scaling Kotlin projects.
Android
Android Plataforma · Part 5
Android Plataforma - Part 5: Simplifying Gradle Init
1 min read Intermediate
In the previous article, we set up our platform with build-logic and registered the greeting task in the main project.
Android
Android Plataforma · Part 6
Android Plataforma - Part 6: Version Catalog
3 min read Intermediate
In the previous post, we optimized our platform and got it ready for more features.
Android
Android Plataforma · Part 7
Android Plataforma - Part 7: Decorating the 'app' module
8 min read Intermediate
In the previous article, we got our platform ready to take on new features.
Android
Android Plataforma · Part 8
Android Plataforma - Part 8: Decorating the 'library' modules
2 min read Intermediate
In the last post, we introduced the first decoration in the Platform and set up our entire app module using the Kotlin DSL.
Android
Android Plataforma · Part 9
Android Plataforma - Part 9: Unifying the Application and Library extensions with the Common Extension
4 min read Intermediate
In the last post, we managed to extract the configuration logic for our library modules.