TLookupStringList class

In unit LookupStringList

Implements an unsorted StringList with a fast lookup feature.

Declaration

pascal

TLookupStringList = class(TStringList)

Inheritance

TLookupStringList
TStringList
TObject

Description

TLookupStringList is a TStringList descendant that implements an unsorted string list with a fast lookup feature. Internally it uses a map container, TStringMap from unit AvgLvlTree, which is a balanced tree. The strings are stored in 2 places, in the string list itself and in the map container. The map is used in Contains, IndexOf and Find methods. The map container does not reserve too much memory because the strings are reference counted and not copied.

All values for the Duplicates property are fully supported, including dupIgnore and dupError (unlike in unsorted TStringList class).

This class is useful when you must preserve the order in list, but also need to do fast lookups to see if a string exists, or must prevent duplicates.

Authors: Juha Manninen / Antônio Galvão

Methods

`InsertItem`	protected	Adds a new value to the items and the string map with duplicate enforcement.
`Create`	public	Constructor for the class instance.
`Destroy`	public	Destructor for the class instance.
`Assign`	public	Implements object persistence in the class.
`Clear`	public	Clears the content stored in the class instance.
`Delete`	public	Deletes the value at the specified position.
`Add`	public	Adds the specified value to the Strings in the list.
`AddObject`	public	Adds the specified values to the Strings and Objects in the list.
`Contains`	public	Determines if the specified value already exists in the string map.
`Find`	public	Locates the specified value in the Strings property.
`IndexOf`	public	Gets the position in Strings where the specified value is stored.

Inherited

From TObject (40)

AfterConstruction BeforeDestruction CheckDisposed ClassInfo ClassName ClassNameIs ClassParent ClassType CleanupInstance DefaultHandler DefaultHandlerStr Dispatch DispatchStr Disposed DisposeOf Equals FieldAddress Free FreeInstance GetDisposed GetHashCode GetInterface GetInterfaceByStr GetInterfaceEntry GetInterfaceEntryByStr GetInterfaceTable GetInterfaceWeak GetLastCastErrorInfo InheritsFrom InitInstance InstanceSize MethodAddress MethodName newinstance QualifiedClassName SafeCallException StringMessageTable SystemHasExtendedRTTI ToString UnitName

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.