title: Unique representation of 2 or more arrays
body: <p>I have got several arrays of fixed length where each component can take on natural number values. In my program 2 vectors are identical in this simple case
  0001112
  1110002</p>
  
  <p>2220001 would also be identical to these 2 arrays</p>
  
  <p>My question is how can I get a unique representation for these two arrays?</p>
  
  <p>Cheers</p>