cltn.pas

《Delphi技术手册源码》原书佩戴的光盘

unit Cltn;

interface

(*
  Collections.
  These interfaces define a general-purpose set of collections.

  Each collection interface might have one or more different classes
  that implement the interface, giving different performance characteristics,
  e.g., THashSet or TTreeSet.

  In order to appear in a collection, an object must implement the
  ICollectible interface. The CompareTo methods returns an integer result:
    < 0 means Self < Obj
    = 0 means the objects are identical
    > 0 means Self > Obj

  A hash value can be any non-negative number. A sample hash function
  for strings is given as the HashString function. For two given objects,
  if the IsEqual function returns True, then their HashValue functions
  must return the same value. The reverse is not necessarily true:
  two objects with the same hash value are not necessarily equal.

  You can have multiple enumerators active on a given collection, but
  you should not modify the collection while the enumerator is active.
  If you must modify the collection, reset the enumerator.

  The enumerator interfaces follow Microsoft's COM convention for
  the Next, Skip, Reset, and Clone methods, but also implement
  some additional methods to make them more useful in Delphi programs.

  When implementing any of these collection interfaces, use the the
  collection exceptions defined in this unit.

  Copyright