The SplMaxHeap class

(PHP 5 >= 5.3.0)

Introdução

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

Sinopse da classe

SplMaxHeap extends SplHeap implements Iterator , Countable {

/* Métodos */

int compare ( mixed $value1 , mixed $value2 )

/* Métodos herdados */

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 )

}

Índice

SplMaxHeap::compare — Compare elements in order to place them correctly in the heap while sifting up.

add a note User Contributed Notes SplMaxHeap

MuLoT [ojousset49 at yahoo dot fr] 17-Dec-2010 05:50


SplMaxHeap simple example with integer values...



<?php

class MySimpleHeap extends SplMaxHeap

{

    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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