TSortedCollection.KeyOf
Return the key of an item
Declaration
Source position: objects.pp line 470
default
function KeyOf(Item: Pointer) : Pointer; Virtual;
Description
KeyOf returns the key associated with Item. TSortedCollection returns the item itself as the key, descendent objects can override this method to calculate a (unique) key based on the item passed (such as hash values).
Keys are used to sort the objects, they are used to search and sort the items in the collection. If descendent types override this method then it allows possibly for faster search/sort methods based on keys rather than on the objects themselves.
Errors
None.
See also
Name | Description |
---|---|
TSortedCollection.Compare | Compare two items in the collection. |
TSortedCollection.IndexOf | Return index of an item in the collection. |