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I wonder why max-key and min-key in Clojure are not named max-by and min-by. Pretty sure few people are aware what they actually do. — Bozhidar Batsov (@bbatsov) December 19, 2015 As you can guess max-key function has its opposite...

In addition to commonly known reduce function Clojure has its specialized version called reduce-kv. This function is designed to work with associative collections (like map or vector). Here is its signature: where: f is a 3 arguments...

I could safely say that map, reduce and filter are the most commonly used functions in Clojure (and probably other functional languages). Of course Clojure provides other useful functions that operate on collections that are not so...

The common thing in functional programming is combining "smaller" functions into the bigger one ( higher-order functions ). The examples of such functions are every-pred and some-fn. Both those functions were added to Clojure in release...

The threading macros (-> and ->>) provide easy to understand and read mechanism of sequential transformation of data in Clojure. I'm pretty sure that you know it, but for the sake of clarity I start this post with a recap. I hope you...