| [Overview][Resource strings][Types][Classes] | Reference for unit 'CacheCls' (#fcl) |
Callback type to check whether 2 data types are equal.
Source position: cachecls.pp line 52
type TOnIsDataEqual = function( |
ACache: TCache; |
AData1: Pointer; |
AData2: Pointer |
):Boolean of object; |
ACache |
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TCache instance which calls the callback. |
AData1 |
|
First data element pointer. |
AData2 |
|
Second data element pointer. |
True if AData1 and AData2 are equal.
TOnIsDataEqual is a callback prototype; It is used by the TCache.Add call to determine whether the item to be added is a new item or not. The function returns True if the 2 data pointers AData1 and AData2 should be considered equal, or False when they are not.
For most purposes, comparing the pointers will be enough, but if the pointers are ansistrings, then the contents should be compared.
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Add a data element to the list. |
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