Add each.

examples/3sum.dst

@@ -2,7 +2,7 @@
 (import "examples/iterators.dst")
 
 (defn sum3
- "Solve the 3SUM problem O(n^2) time."
+ "Solve the 3SUM problem in O(n^2) time."
  [s]
  (def tab @{})
  (def solutions @{})

examples/frequencies.dst

@@ -4,7 +4,7 @@
  "Get the number of occurences of each value in a indexed structure."
  [ind]
  (def freqs @{})
- (map (fn [x] 
+ (each (fn [x] 
     (let [n (get freqs x)]
      (put freqs x (if n (+ 1 n) 1)))) ind)
  freqs)