For a high-powered version of this written in CoffeeScript which works over arrays and lazy sequences (streams) look here https://github.com/swannodette/fun.cof

For a high-powered version of this written in CoffeeScript which works over arrays and lazy sequences (streams) look here https://github.com/swannodette/fun.coffee/blob/master/src/fun.coffee https://github.com/swannodette/fun.coffee/blob/master/src/fu... ClojureScript of course takes it even further.