function
boot.janet on line 1328 , column 1
(has-value? ds value )
Check if a data structure `ds` contains the value `value` . Will run
in time proportional to the size of `ds` .
(defn array-difference [array-1 array-2 ]
(filter |(not (has-value? array-2 $ )) array-1 ))
(array-difference [1 2 3 4 5 ] [2 3 4 ]) # => @[1 5]