title: How to use associative arrays or Hash tables in Chicken Scheme?
body: <p><strong>How to use associative arrays or Hash tables in Chicken Scheme?</strong></p>
  
  <p>I'm looking for a data structure that supports (near) O(1) access to data based on keys, which should work like Java's <code>HashMap</code> or Python's <code>dict</code> data structures in Chicken Scheme.<br>
  There seem to be eggs that implement that functionality, but I'd rather use something more standard.</p>
  
  <p>Apparently, there seems to be an effort to define a standard library with Scheme R6RS, but I'm not sure if that's a viable option for Chicken.</p>