Browse Clojure Foundations for Java Developers

Data Transformation and Pipelines

Build readable pipelines that transform nested data without mutation.

In Clojure, “business logic” often looks like a pipeline: take a value (usually a map/vector), apply small transformations, and return a new value.

As a Java engineer, the biggest habit shift is moving from:

  • “loop + mutate accumulator” → “compose transformations”

This section focuses on writing pipelines that are easy to read in code review: clear data flow, small helper functions, and minimal cleverness. Threading macros (->, ->>) are often the difference between a readable pipeline and a nested mess.

In this section

Revised on Friday, April 24, 2026