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The SplMaxHeap class

(PHP 5 >= 5.3.0)

简介

The SplMaxHeap class provides the main functionalities of a heap, keeping the maximum on the top.

类摘要

SplMaxHeap extends SplHeap implements Iterator , Countable {
/* 方法 */
int compare ( mixed $value1 , mixed $value2 )
/* 继承的方法 */
abstract int SplHeap::compare ( mixed $value1 , mixed $value2 )
int SplHeap::count ( void )
mixed SplHeap::current ( void )
mixed SplHeap::extract ( void )
void SplHeap::insert ( mixed $value )
bool SplHeap::isEmpty ( void )
mixed SplHeap::key ( void )
void SplHeap::next ( void )
void SplHeap::recoverFromCorruption ( void )
void SplHeap::rewind ( void )
mixed SplHeap::top ( void )
bool SplHeap::valid ( void )
}

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PHP手册 - N: The SplMaxHeap class

用户评论:

MuLoT [ojousset49 at yahoo dot fr] (17-Dec-2010 01:50)

SplMaxHeap simple example with integer values...

<?php
class MySimpleHeap extends SplHeap
{
    public function  compare( $value1, $value2 ) {
        return ( $value1 - $value2 );
    }
}

$obj = new MySimpleHeap();
$obj->insert( 4 );
$obj->insert( 8 );
$obj->insert( 1 );
$obj->insert( 0 );

foreach( $obj as $number ) {
    echo $number.\"\\n\";
}

/*
    Output display :
    8
    4
    1
    0
*/
?>