Kotlin Basics
Discover how to write cleaner, more expressive code using Kotlin's powerful when expression. Learn everything from basic replacements for switch statements to advanced sealed class pattern matching with real-world examples
Spring Basics
Transition from Java to Kotlin in your Spring Boot applications with this comprehensive guide. Learn how Kotlin's modern features simplify Spring Boot development through practical examples, including building a complete REST API with database integration, testing, and error handling.
Kotlin Basics
Learn all the ways to add elements to lists in Kotlin, from single items to collections. Includes mutable vs immutable lists and best practices.
Snacks
Learn how to properly handle JSON string conversion errors in Kotlin Spring Boot applications with practical solutions and best practices
Snack
Learn the different ways to add values to a HashMap in Kotlin, including put(), plusAssign, and bracket notation. Complete with practical examples.
Testing
Learn how to write effective unit tests for your Kotlin Spring Boot application using JUnit 5 and Mockito, with practical examples and best practices
Kotlin Basics
Master Kotlin's interface delegation pattern with clear examples and best practices. Learn how this powerful feature improves upon Java's interface implementation approach.
Spring Data
Learn how @Transactional works in Spring Boot with Kotlin, from basic usage to advanced scenarios. Master isolation levels, propagation, read-only optimizations, and best practices with practical examples
Thymeleaf
Discover how to effectively use Thymeleaf expressions in your Spring Boot applications. This comprehensive guide covers everything from basic variable expressions to advanced preprocessing, with real Kotlin examples and proven best practices for production applications.
Thymeleaf
Master Thymeleaf fragments to build maintainable Spring Boot templates with Kotlin. This comprehensive guide covers everything from basic fragment creation to advanced techniques like parameterized fragments and layout templates, complete with real-world code examples.
common-problems
Learn how to fix the 'Classes annotated with @Configuration must not be final' error in Kotlin Spring Boot applications using kotlin-allopen plugin. Complete guide with Maven & Gradle examples.
rest
Master Spring Boot error handling in Kotlin with comprehensive examples: learn to implement global exception handlers, custom error responses, and production-ready error handling strategies