title: How do I push a value onto a Perl hash of arrays?
body: <pre><code>%TEST ; 
  
  ... 
  for  {
     sub atest
     }
   sub atest {
   ...
      push $TEST { TEST1 }[0] = "some value " 
  }
  </code></pre>
  
  <p>How do I push values into a hash of arrays without knowing anything about index? </p>
  
  <p>How do I achieve this? </p>