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                <pre><h6><i><a href="https://github.com/zcaudate/hara/blob/master/test/hara/state/ova_test.clj#L173-L190" target="_blank">link</a></i></h6><code class="clojure">(def o (ova [{:id :1 :val 1} {:id :2 :val 1}
             {:id :3 :val 2} {:id :4 :val 2}]))

(has? o)
=> true

(has? o 0)
=> true

(has? o -1)
=> false

(has? o [:id '((name)
               (bigint)
               (odd?))])
=> true</code></pre>
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