Note the definition of SplMaxHeap::compare() is different from SplMinHeap::compare()
SplMaxHeap::compare
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplMaxHeap::compare — Compare elements in order to place them correctly in the heap while sifting up
参数
-
value1 -
The value of the first node being compared.
-
value2 -
The value of the second node being compared.
返回值
Result of the comparison, positive integer if value1 is greater than value2, 0 if they are equal, negative integer otherwise.
注意:
Having multiple elements with the same value in a Heap is not recommended. They will end up in an arbitrary relative position.
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sixd at php dot net ¶
13 years ago
