Tree visitors in Clojure

Update the Java Visitor pattern with functional zippers

From the developerWorks archives

Alex Miller

Date archived: April 18, 2019 | First published: September 20, 2011

JVM language explorer Alex Miller has recently discovered the benefits of implementing the Visitor pattern using Clojure, a functional Lisp variant for the Java virtual machine. In this article, he revisits the Visitor pattern, first demonstrating its use in traversing tree data in Java programs, then rewriting it with the addition of Clojure's functional zippers.

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