Atoms

ClojureScript Koans Atoms Answers
http://clojurescriptkoans.com/#atoms/1


(def atomic-clock (atom 0))

1)Atoms are references to values

(=  0  (deref atomic-clock))

2)You can get its value more succintly

(=  0  @atomic-clock)

3)You can even change at the swap meet

(=  1  (do (swap! atomic-clock inc) @atomic-clock))

4)Keep taxes out of this: swapping requires no transaction

(= 5 (do  (swap! atomic-clock #(+ % 5))  @atomic-clock))

5)Any number of arguments might happen during a swap

(=  15  (do (swap! atomic-clock + 1 2 3 4 5) @atomic-clock))

6)Atomic atoms are atomic

(=  0  (do (compare-and-set! atomic-clock 100 :fin)@atomic-clock))

7)When your expectations are aligned with reality things, proceed that way

(= :fin (do (compare-and-set!  atomic-clock 0 :fin ) @atomic-clock))