QuickHashIntHash::exists

This method checks whether a key is part of the hash

説明

public bool QuickHashIntHash::exists(int $key)

This method checks whether an entry with the provided key exists in the hash.

パラメータ

key: The key of the entry to check for whether it exists in the hash.

戻り値

Returns true when the entry was found, or false when the entry is not found.

例

例1 QuickHashIntHash::exists example

<?php
//generate 200000 elements
$array = range( 0, 199999 );
$existingEntries = array_rand( array_flip( $array ), 180000 );
$testForEntries = array_rand( array_flip( $array ), 1000 );
$foundCount = 0;

echo "Creating hash: ", microtime( true ), "\n";
$hash = new QuickHashIntHash( 100000 );
echo "Adding elements: ", microtime( true ), "\n";
foreach( $existingEntries as $key )
{
     $hash->add( $key, 56 );
}

echo "Doing 1000 tests: ", microtime( true ), "\n";
foreach( $testForEntries as $key )
{
     $foundCount += $hash->exists( $key );
}
echo "Done, $foundCount found: ", microtime( true ), "\n";
?>

上の例の出力は、たとえば以下のようになります。

Creating hash: 1263588703.0748
Adding elements: 1263588703.0757
Doing 1000 tests: 1263588703.7851
Done, 898 found: 1263588703.7897