thread last (->>)
threads value through calls as their last argument
(->> expr forms*)
Evaluates expr and threads it through the supplied forms as their last argument. Any form that is not already a function call will be converted into one before threading.
(->> 0 (+ 10) (* 2) (/ 5.0))
Will expand to
(/ 5.0 (* 2 (+ 10 0))) and return 0.25.