Exercises for the Mastering Kotlin Refactoring workshop

Luhn Validation: Refactor an unnecessarily verbose collection pipeline, with hints from IntelliJ
Gilded Rose: plenty of refactoring opportunities in an extended version of the Gilded Rose refactoring kata featured on Duncan's YouTube channel
Conference Signup: refactor from mutable "bean" to algebraic data type and functions
Cycle Race Leaderboard: refactoring Kotlin code & database schema, requiring multiple expand/contract deployments to apply the change without downtime
Boat Maintenance Log: refactor serialised classes, requiring a strategy to cope with different versions of the data

Prerequisites

Before the workshop, install the following:

Name		Name	Last commit message	Last commit date
Latest commit History 5 Commits
.idea		.idea
exercises		exercises
gradle/wrapper		gradle/wrapper
.editorconfig		.editorconfig
.gitignore		.gitignore
.java-version		.java-version
README.md		README.md
build.gradle.kts		build.gradle.kts
gradle.properties		gradle.properties
gradlew		gradlew
gradlew.bat		gradlew.bat
settings.gradle.kts		settings.gradle.kts