CFSetGetCountOfValue(_:_:)
Returns the number of values in a set that match a given value.
Declaration
func CFSetGetCountOfValue(_ theSet: CFSet!, _ value: UnsafeRawPointer!) -> CFIndexParameters
- theSet:
The set to examine.
- value:
The value for which to search in
theSet. Comparisons are made using the equal callback provided whentheSetwas created. If the equal callback wasNULL, pointer equality (in C, ==) is used.
Return Value
The number of times value occurs in theSet. By definition, sets can not contain duplicate values, so returns 1 if value is contained in theSet, otherwise 0.
Discussion
This function uses the equal callback. value and all elements in the set must be understood by the equal callback.