External Interfaces/API

Description of Function pb_lookup

Arguments passed to pb_lookup are the Properties object pb_htable and the name key for the requested entry. The pb_lookup function first calls get on pb_htable with the name key, on which support function pb_keyfilter is called to change spaces to underscores. The get method returns the entry (or null, if the entry is not found) to variable entry. Note that get takes an argument of type java.lang.Object and also returns an argument of that type. In this invocation, the key passed to get and the entry returned from it are actually character arrays.

pb_lookup then calls isempty to determine whether entry is null. If it is, it uses disp to display an message stating that the name was not found. If entry is not null, it calls pb_display to display the entry.

• function pb_lookup(pb_htable,name)
  entry = pb_htable.get(pb_keyfilter(name));
  if isempty(entry),
     disp(sprintf('The name %s is not in the phone book',name));
  else
     pb_display(entry);
  end
  

Description of Function phonebook

Description of Function pb_add