"Processing documents with transducers" is probably one of the more interesting, yet still simple enough to be understandable, examples of transducers: (http://

"Processing documents with transducers" is probably one of the more interesting, yet still simple enough to be understandable, examples of transducers: (http://blog.juxt.pro/posts/xpath-in-transducers.html http://blog.juxt.pro/posts/xpath-in-transducers.html)