XKCD: From Tile to Picture - Seeing the Full Image
A step-by-step walkthrough of reconstructing the massive XKCD #1110 Click and Drag comic from its individual tile images using Kotlin.
Kotlin
11 posts. All tags
How to Fix Misconfigurations in RedisTemplate
A practical guide to identifying and fixing common RedisTemplate misconfiguration pitfalls in Spring Boot, with a focus on serialization issues.
Observability in Action: How to Use OpenTelemetry
A hands-on guide to adding distributed tracing and observability to a Kotlin/Spring Boot service using OpenTelemetry and HoneyComb.
[Interview Questions] Concurrency vs. Parallelism: Decoding the Simultaneous Illusion
A clear explanation of the difference between concurrency and parallelism, illustrated with practical JVM-based examples commonly asked about in technical interviews.
![[Interview Questions] Concurrency vs. Parallelism: Decoding the Simultaneous Illusion](/images/blog/covers/pixel/interview-questions-concurrency-parallelism.png)
How To Build Your Domain Gateway With OpenAPI
An introduction to the domain gateway pattern and a practical tutorial for building one in Kotlin using OpenAPI code generation.
How to Use OpenAPI to Build a Robust RESTful API
How to adopt a spec-first approach with OpenAPI to design and generate a robust, well-typed REST API using Spring Boot, Kotlin, and Gradle.
Create a Custom Spring Boot App Banner
A fun walkthrough of how to replace the default Spring Boot startup banner with custom text and ASCII art to give your application a personal touch.
How does HashMap work in Java?
A deep dive into the internal mechanics of Java's HashMap, covering the equals/hashCode contract, bucket distribution, and the binary tree optimization introduced in Java 8.
How to Break Your HashMap in Less Than a Minute
A cautionary demonstration of how using mutable objects as HashMap keys silently corrupts lookups, and the simple rule that prevents it.
How to inject multiple implementations in the Spring Framework
An exploration of the different strategies Spring Framework offers for injecting multiple implementations of the same interface into a single bean.
Build your own Twitter Bot with Kotlin
A beginner-friendly tutorial for building and deploying a fully functional Twitter bot from scratch using Kotlin and the Twitter4J library.
