HID: LIST arrays

Hello!

FYI

      @include �github.com/digics/UID10/uid.lib�     

      LIST = hid::get( �LIST� )


An array (A) in AWK can represent a list of unique items with an undefined order.
To introduce the concept of an array with a defined sequence of its indexes (items),
we need to specify this sequence in a subarray A[LIST] as a simple list:

The element A[ LIST ][ "" ] stores the index of the first item in the list:
     
      # items of A: first, next and last:

      A[ LIST ][ �� ] = �first�
               [ �first� ] = �next�
               [ �next� ] = �last�
               [ �last� [ = ��

       [ �first� ]...
       [ �next� ]...
       [ �last� ]...

Thus, instead of a for-in loop for array A, we use:

      i = ��

      while ( �� != i = A[ LIST][ i ] )

            # process A[ i ]

or

      for ( i = ��; �� != i = A[ LIST ][ i ]; )

            # process A[ i ]

At the same time, we can still work with the main array in a for-in loop � with one caveat:

      for ( i in A )
     
            if ( i in HID )

                  continue          # this is hid (LIST)

            else

                  # process A[ i ]

In case a bidirectional list is needed, another subarray A[LIST][LIST] is created
within the subarray A[LIST], where the items are listed in reverse order,
 and the element A[LIST][LIST][""] stores the index of the last item in the list.

best regards)


--------------=  Posted using GrabIt  =----------------
------=  Binary Usenet downloading made easy =---------
-=  Get GrabIt for free from https://www.shemes.com/  =-