gistfile1.txt

(defn min-max-calc []
  (let [mode @rpick/mode ;; a variable that is 0,1,or 2 
        [min max] (case mode  ;; destructuring in action: switch / case returns vector, assigns names min / max same time
                    0 [180.0 250.0]
                    1 [250 400 ]
                    2 [400 650 ]
                    [180.0 250.0])
        width (-                      ;; actually kinda shitty... i should be passing the width as a param... this funciton 
               (utils/portal-width)   ;; shuoldn't know that there's a div with 30px padding
               30)]
    (->> (range min max) ;; creates a range [180,181,182] 
         (reduce (fn [memo item]  ;; reduce over the range 
                   (conj memo [(mod width item) item] )  ;; add [mod, range] e.g. [[1,180] [2,181] [10,182]]
                   ) [] )
         (sort-by first)  ;; sort by the modulus 
         first  ;; get first one... [1,180]
         last)))  ;; get last in there 180