[Overview][Constants][Types][Classes][Procedures and functions][Index] Reference for unit 'Contnrs' (#fcl)


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Custom bucket list class


Source position: contnrs.pp line 536

type TCustomBucketList = class(TObject)


  destructor Destroy; override;


Frees the bucketlist from memory

  procedure Clear;


Clear the list

  function Add();


Add an item to the list

  procedure Assign();


Assign one bucket list to another

  function Exists();


Check if an item exists in the list.

  function Find();


Find an item in the list

  function ForEach();


Loop over all items.

  function Remove();


Remove an item from the list.

  property Data []: Pointer; default; [rw]


Associative array for data pointers





Custom bucket list class




TCustomBucketList is an associative list using buckets for storage. It scales better than a regular TList list class, especially when an item must be searched in the list.

Since the list associates a data pointer with each item pointer, it follows that each item pointer must be unique, and can be added to the list only once.

The TCustomBucketList class does not determine the number of buckets or the bucket hash mechanism, this must be done by descendent classes such as TBucketList. TCustomBucketList only takes care of storage and retrieval of items in the various buckets.

Because TCustomBucketList is an abstract class - it does not determine the number of buckets - one should never instantiate an instance of TCustomBucketList, but always use a descendent class such as TCustomBucketList.

See also



Default bucket list implementation.

Documentation generated on: Jun 22 2020