SplHeap::extract

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

SplHeap::extractExtracts a node from top of the heap and sift up

Descrição

public SplHeap::extract(): mixed

Parâmetros

Esta função não possui parâmetros.

Valor Retornado

The value of the extracted node.

Erros/Exceções

Throws RuntimeException when the data-structure is empty.

add a note add a note

User Contributed Notes 1 note

up
10
Sandro Alves Peres
11 years ago
<?php
$heap
= new SplMaxHeap(); # Ascending order
$heap->insert('E');
$heap->insert('B');
$heap->insert('D');
$heap->insert('A');
$heap->insert('C');

echo
$heap->extract(), PHP_EOL; # E
echo $heap->extract(), PHP_EOL; # D

$heap = new SplMinHeap(); # Descending order
$heap->insert('E');
$heap->insert('B');
$heap->insert('D');
$heap->insert('A');
$heap->insert('C');

print
PHP_EOL;
echo
$heap->extract(), PHP_EOL; # A
echo $heap->extract(), PHP_EOL; # B
?>
To Top