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typedef int(* axlEqualFunc)(axlPointer a, axlPointer b)

Handler definition used to compare two elements.

In the case they are equal, 0 is returned. In the case a should be before b the -1 is returned. In the case a should be after b then 1 should be returned. A properly configured handler should help collections and other function to order elements.

aThe element to compare
bThe other element to compare
A value selected from {-1,0,1} according to previous description.