RE: Wishing well

I usually do this:

   array res=({});
   mapping done=([]);
   for(int i=0;i<100;i++)
   {
      for(int j=0;j<100;j++)
      {
         int t=random(1);
         string key=sort((array(string))({i,j,t}))*",";
         if(!done[key])
         {
            res+=({(<i,j,t>)});
            done[key]=1;
         }
      }
   }

I do cast to string for cache-keys a lot. (And I usually use mappings
when I want a hashtable.)