- PHP 手册
- 函数参考
- 其它基本扩展
- SPL
- 数据结构
- SplMaxHeap
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
说明
protected SplMaxHeap::compare(mixed$value1, mixed $value2): int
Compare value1 with value2.
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.
User Contributed Notes 1 note
up down 2 sixd at php dot net ¶11 years ago
Note the definition of SplMaxHeap::compare() is different from SplMinHeap::compare()
add a note
官方地址：https://www.php.net/manual/en/splmaxheap.compare.php