PHP 5.4.31 Released

The SplMaxHeap class

(PHP 5 >= 5.3.0)

Introducere

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

Sinopsisul clasei

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

Cuprins

  • SplMaxHeap::compare — Compare elements in order to place them correctly in the heap while sifting up.
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User Contributed Notes 1 note

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MuLoT [ojousset49 at yahoo dot fr]
3 years ago
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
*/
?>
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