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By: a guest on Jun 1st, 2012  |  syntax: None  |  size: 0.11 KB  |  hits: 15  |  expires: Never
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  1. ;; anonymous solution to A nil key
  2. ;; https://4clojure.com/problem/134
  3.  
  4. #(and (contains? %2 %1) (nil? (%2 %1)))