A thought concerning matrix index variables...

RFC 169 says it would be nice if:

   @a[^i;^j] = @b[^j;^i];

did a transpose operation.

Should the syntax also allow:

   # fill a 10x10 array with 0-99
   my @table: bounds(10,10);
   @table[^i;^j] = ^i*10 + ^j;