Re: Avoiding side effects

[Ole-Hjalmar Kristensen <ole-hjalmar.kristensen@substitute_employer_here.com>]

If I understand your problem correctly, why not simply do the
following after the sort -u stage?:

comm -23 fileA fileB

But to answer the Ada quiestion, I think I would organize the loop a
little bit differently. The following is a classical way of merging
two files, but it should work in your case too:

  while not End_Of_File(File_A) and not End_Of_File(File_B) loop
  -- Process records from both files
  end loop;

  while not End_Of_File(File_A) loop
  -- Process tail of file A
  end loop;

  while not End_Of_File(File_B) loop
  -- Process tail of file B
  end loop;

-- 
   C++: The power, elegance and simplicity of a hand grenade.