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Scopes are one of Rails' most useful features and one of its most abused. Here is how to use them for what they're good at, recognize when they've outgrown the model, and avoid the composition traps that cause subtle bugs.
Read morePrimitive values scattered across a domain model are a maintenance liability. Value objects give concepts like money, coordinates, and email addresses a home — with equality semantics, validation, and behavior that travels with the data.
Read moreVirtual threads are production-ready in Java 21 and change the scalability profile of I/O-bound Java services without requiring reactive programming. Here is the precise model, the traps, and a migration checklist.
Read moreSpring controllers accumulate logic because they're the most visible layer and the easiest place to add code. The result is controllers that are hard to test, hard to reuse, and hard to change. Here is a clear boundary that scales.
Read moreSpring Boot startup involves auto-configuration, bean registration, context refresh, and lifecycle callbacks — in a specific order that determines when your code runs and why some startup bugs are hard to diagnose.
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