Loopr: A Loop/Reduction Macro for Clojure

I write a lot of reductions: loops that combine every element from a collection in some way. For example, summing a vector of integers: (reduce (fn [sum x] (+ sum x)) 0 [1 2 3]) ; => 6 If you’re not familiar with Clojure’s reduce, it takes a reducing function f, an initial accumulator init, and a collection xs. It then invokes (f init x0) where x0 is the first element in xs. f returns a new accumu

[masa8aurum]

reduceとloop/recurのいいとこどりをしたマクロ`loopr`を作ったよ、という話