https://blog.hellonico.info/categories/architecture/ Recent content in Architecture on NicoLabs Hugo en Sat, 10 Oct 2026 01:45:00 +0900 https://blog.hellonico.info/posts/transducers-and-reducers-for-normal-humans/ Sat, 10 Oct 2026 01:45:00 +0900 https://blog.hellonico.info/posts/transducers-and-reducers-for-normal-humans/ <p>Let’s be completely honest with each other.</p> <p>If you have spent any time around Clojure, functional programming, or modern Lisp communities over the last decade, you have almost certainly encountered people speaking about <strong>Transducers</strong> and <strong>Reducers</strong> in hushed, reverent tones—as if they were forbidden alien technology recovered from a crashed UFO in Roswell.</p> <p>You open the documentation, and you are immediately greeted by sentences like:</p> <blockquote> <p><em>&ldquo;Transducers are composable algorithmic transformations decoupled from their input or output sources. A transducer is a function that accepts a reducing function and returns a new reducing function.&rdquo;</em></p>