Scala language9 min read
Using traits as precise boundaries in Scala
Traits can define capabilities, share behaviour and close a domain hierarchy; those are different jobs with different design trade-offs.
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Technical articles on languages, databases, serverless platforms and the awkward realities of keeping systems moving.
Showing 19–27 of 28 Scala articles
Functional Scala11 min read
Typeclasses in practical Scala: behaviour without inheritance
How a typeclass separates behaviour from data, how Scala 2 implicits and Scala 3 given instances supply evidence, and when the pattern is worth using.
Read articleFunctional Scala11 min read
Error handling as values in Scala
Model expected failures with sealed types and Either, keep unexpected failures distinct, and translate both deliberately at HTTP and asynchronous boundaries.
Read articleFunctional Scala14 min read
Option, Either and other monads in practical Scala
How Option, Either, collections, Future and IO represent different computational contexts, and how map, flatMap and for-comprehensions compose them.
Read articleFunctional Scala11 min read
.map and .flatMap in Scala: follow the types
A type-led guide to transforming and sequencing Option, Either, collections, Future and IO, including for-comprehension translation and common nesting mistakes.
Read articleScala architecture13 min read
Keep application boundaries typed until the edge
Why returning JsValue from a service and hiding data shapes behind aliases can weaken a Scala application, and how to keep Play HTTP, domain and persistence contracts explicit.
Read articleScala14 min read
How Scala fits together: language, runtime and ecosystem
A technical guide to Scala’s type system, execution models, common use cases and the libraries that turn the language into a production stack.
Read articleScala15 min read
Should you migrate from Scala 2 to Scala 3?
A technical decision guide to compatibility, macros, dependencies, compiler migration modes, cross-building and a staged route from Scala 2.13 to Scala 3.
Read articlePlay Framework5 min read
Common problems in long-lived Play Framework applications
The Play version gets the blame, but the real trouble is often hiding elsewhere.
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