ReadMeFeed / Community knowledge
Real questions. Useful conversations. Find the people who know your stack.
Languages & runtimes · #clojure
Learn how transducers let you reuse the same transformation logic across sequences, channels, and reducers while avoiding intermediate collections.
When Clojure’s plain maps feel heavy, <code>defrecord</code> and <code>deftype</code> offer memory‑efficient, immutable alternatives. This guide explains when to use each, shows a concrete example, and lists common pitfalls to avoid.
Stop chasing NullPointerExceptions through your stack trace. Learn how to use Clojure Spec to validate data at boundaries and instrument functions during development.
Shows how to define specs, validate data at system edges, and use generative testing for confidence.
State Management with Atoms Clojure Atoms utilize a Compare-And-Swap (CAS) mechanism to ensure thread-safe state transitions. The swap! function applies a transformation function to the current state and retries the operation if the state is modified by another thread before the commit completes. Performance Constraints While this lock-free approach prevents
The Clojure instant reader parses offset‑less ISO‑8601 strings as UTC instants, and there is no built‑in switch to treat those values as belonging to a particular JVM time zone. Developers who need regional timestamps must manually attach a ZoneId after parsing, which can be error‑prone and repetitive across code bases. The goal is to allow offset‑less #inst
Clojure Var Visibility Clojure provides a mechanism to mark vars as private by prefixing the symbol name with a colon during definition. This prevents the var from being exported in the namespace's var map, effectively blocking standard external access via namespace qualification. While this approach manages public API surface area, it creates a binary visib