TGHashtable Class

Warning
Deprecated since Delphi XE4. Please use the RSGenerics.Collections\|TRSHashTable<TKey,TValue> generics class instead.

TPersistent
GHashTable.TGCustomHashtable
GHashTable.TGHashtable
GHashTable.TGHashIntTable

Delphi

type
TGHashtable = class(TGCustomHashtable)
end;

	Name	Description
	Create(Cardinal,Single)	Initializes a new instance of the TGCustomHashtable class. (Inherited from GHashTable.TGCustomHashtable.)

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	Name	Description
	CachedEntry	Represents property CachedEntry. (Inherited from GHashTable.TGCustomHashtable.)
	CachedHashIndex	Represents property CachedHashIndex. (Inherited from GHashTable.TGCustomHashtable.)
	CachedIndex	Represents property CachedIndex. (Inherited from GHashTable.TGCustomHashtable.)
	Capacity	Represents property Capacity.
	Collisions	Represents property Collisions.
	Count	Represents property Count.
	Empty	Represents property Empty.
	Enumerator	Represents property Enumerator. (Inherited from GHashTable.TGCustomHashtable.)
	EOT	Returns whether you are at the end of the table. This property is used with the Reset and NextElement methods to iterate through the entire table of items (Inherited from GHashTable.TGCustomHashtable.)
	HashType	Represents property HashType.
	ItemByIndex[Integer]	Represents property ItemByIndex[Integer].
	Item[TRSPointerType]	Represents property Item[TRSPointerType].
	KeyByIndex[Integer]	Represents property KeyByIndex[Integer].
	LoadFactor	Represents property LoadFactor.
	OnChange	Represents property OnChange.
	Owner	Represents property Owner. (Inherited from GHashTable.TGCustomHashtable.)
	Table	Represents property Table. (Inherited from GHashTable.TGCustomHashtable.)
	Threshold	Represents property Threshold.
	Updating	Represents property Updating. (Inherited from GHashTable.TGCustomHashtable.)

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	Name	Description
	Assign(TPersistent)	Copies the Source hashtable to the current table (Inherited from GHashTable.TGCustomHashtable.)
	BeginUpdate	Enables the hash table to track when the table is changing (Inherited from GHashTable.TGCustomHashtable.)
	Change	Represents method Change. (Inherited from GHashTable.TGCustomHashtable.)
	Clear	Clear the table instance of all elements (Inherited from GHashTable.TGCustomHashtable.)
	ClearCache	Represents method ClearCache. (Inherited from GHashTable.TGCustomHashtable.)
	ContainsItem(TRSPointerType)	Returns a boolean value indicating whether the Value is contained within the table (Inherited from GHashTable.TGCustomHashtable.)
	ContainsKey(TRSPointerType)	Overloaded. Represents method ContainsKey(TRSPointerType).
	ContainsKey(TRSPointerType,TRSPointerType)	Overloaded. Represents method ContainsKey(TRSPointerType,TRSPointerType).
	DivisionHash(Integer,Integer)	Represents method DivisionHash(Integer,Integer). (Inherited from GHashTable.TGCustomHashtable.)
	Elements	Returns an iterator (enumeration) for the items in the table (Inherited from GHashTable.TGCustomHashtable.)
	EndUpdate	Enables the hash table to track when the table has finished changing (Inherited from GHashTable.TGCustomHashtable.)
	FindEntry(TRSPointerType)	Represents method FindEntry(TRSPointerType). (Inherited from GHashTable.TGCustomHashtable.)
	FoldingHash(Integer,Integer)	Represents method FoldingHash(Integer,Integer). (Inherited from GHashTable.TGCustomHashtable.)
	Get(TRSPointerType)	Represents method Get(TRSPointerType).
	GetEnumerator	Returns an enumerator for the hashtable (Inherited from GHashTable.TGCustomHashtable.)
	GetItemByIndex(Integer)	Represents method GetItemByIndex(Integer). (Inherited from GHashTable.TGCustomHashtable.)
	GetKeyByIndex(Integer)	Represents method GetKeyByIndex(Integer). (Inherited from GHashTable.TGCustomHashtable.)
	GetValue(TRSPointerType)	Represents method GetValue(TRSPointerType). (Inherited from GHashTable.TGCustomHashtable.)
	GoToEntry(Integer)	Represents method GoToEntry(Integer). (Inherited from GHashTable.TGCustomHashtable.)
	HashCode(TRSPointerType,Integer)	Represents method HashCode(TRSPointerType,Integer). (Inherited from GHashTable.TGCustomHashtable.)
	HasKey(TRSPointerType)	Overloaded. Represents method HasKey(TRSPointerType). (Inherited from GHashTable.TGCustomHashtable.)
	HasKey(TRSPointerType,TGHashtableEntry)	Overloaded. Represents method HasKey(TRSPointerType,TGHashtableEntry). (Inherited from GHashTable.TGCustomHashtable.)
	Indices	Returns an iterator (enumeration) for the indices (Inherited from GHashTable.TGCustomHashtable.)
	MidSquareHash(Integer,Integer)	Represents method MidSquareHash(Integer,Integer). (Inherited from GHashTable.TGCustomHashtable.)
	NewHashtableEntry	Represents method NewHashtableEntry. (Inherited from GHashTable.TGCustomHashtable.)
	Next	Represents method Next.
	NextElement	Returns next element in the iterator (Inherited from GHashTable.TGCustomHashtable.)
	Put(TRSPointerType,TRSPointerType)	Represents method Put(TRSPointerType,TRSPointerType).
	PutValue(TRSPointerType,TRSPointerType)	Represents method PutValue(TRSPointerType,TRSPointerType). (Inherited from GHashTable.TGCustomHashtable.)
	Rehash	Represents method Rehash. (Inherited from GHashTable.TGCustomHashtable.)
	Remove(TRSPointerType)	Represents method Remove(TRSPointerType).
	RemoveValue(TRSPointerType)	Represents method RemoveValue(TRSPointerType). (Inherited from GHashTable.TGCustomHashtable.)
	Reset	Resets the enumeration used by the NextElement method and EOT property to iterate through all the items in the table, i.e., it puts you back at the beginning of the table (Inherited from GHashTable.TGCustomHashtable.)
	SetCollisions(Integer)	Represents method SetCollisions(Integer). (Inherited from GHashTable.TGCustomHashtable.)
	SetCount(Integer)	Represents method SetCount(Integer). (Inherited from GHashTable.TGCustomHashtable.)
	TruncationHash(Integer,Integer)	Represents method TruncationHash(Integer,Integer). (Inherited from GHashTable.TGCustomHashtable.)

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Hash tables provide constant time O(C) search access to any value in the table (using the key) as the table grows (unlike a TList where to search for an item is O(n) (or O(log n) for sorted TStrings)

Reference

•GHashTable

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