title: What does the @ (at sign) mean in Clojure?
body: <p>I found this line of Clojure code: <code>@(d/transact conn schema-tx)</code>. It's a Datomic statement that creates a database schema. I couldn't find anything relevant on Google due to difficulties searching for characters like "@".</p>
  
  <p>What does the 'at' sign mean before the first parenthesis?</p>