DPC2020 - Workshop day

SplMinHeap クラス

(PHP 5 >= 5.3.0, PHP 7)

はじめに

SplMinHeap クラスは、ヒープの主要な機能を提供し、最小値を先頭に保ちます。

クラス概要

SplMinHeap extends SplHeap implements Iterator , Countable {
/* メソッド */
protected compare ( mixed $value1 , mixed $value2 ) : int
/* 継承したメソッド */
abstract protected SplHeap::compare ( mixed $value1 , mixed $value2 ) : int
public SplHeap::count ( void ) : int
public SplHeap::current ( void ) : mixed
public SplHeap::extract ( void ) : mixed
public SplHeap::insert ( mixed $value ) : void
public SplHeap::isCorrupted ( void ) : bool
public SplHeap::isEmpty ( void ) : bool
public SplHeap::key ( void ) : mixed
public SplHeap::next ( void ) : void
public SplHeap::recoverFromCorruption ( void ) : void
public SplHeap::rewind ( void ) : void
public SplHeap::top ( void ) : mixed
public SplHeap::valid ( void ) : bool
}

目次

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User Contributed Notes 1 note

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1
gom
3 months ago
I experimented what happens when arrays are inserted:

<?php
$heap
= new SplMinHeap();
$heap->insert([22,333]);
$heap->insert([2,33]);
$heap->insert([222,3]);

var_export($heap->extract());
echo
'<br>';
var_export($heap->extract());
echo
'<br>';
var_export($heap->extract());
?>

Output:

array ( 0 => 2, 1 => 33, )
array ( 0 => 22, 1 => 333, )
array ( 0 => 222, 1 => 3, )
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