QuickHashIntHash::exists
(PECL quickhash >= Unknown)
QuickHashIntHash::exists — This method checks whether a key is part of the hash
Описание
public bool QuickHashIntHash::exists
( int
$key
)This method checks whether an entry with the provided key exists in the hash.
Список параметров
-
key -
The key of the entry to check for whether it exists in the hash.
Возвращаемые значения
Returns TRUE when the entry was found, or FALSE when the entry is not
found.
Примеры
Пример #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";
?>
Результатом выполнения данного примера будет что-то подобное:
Creating hash: 1263588703.0748 Adding elements: 1263588703.0757 Doing 1000 tests: 1263588703.7851 Done, 898 found: 1263588703.7897
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения, относящиеся к переменным и типам
- Quickhash
- Функция QuickHashIntHash::add() - This method adds a new entry to the hash
- Функция QuickHashIntHash::__construct() - Creates a new QuickHashIntHash object
- Функция QuickHashIntHash::delete() - This method deletes am entry from the hash
- Функция QuickHashIntHash::exists() - This method checks whether a key is part of the hash
- Функция QuickHashIntHash::get() - This method retrieves a value from the hash by its key
- Функция QuickHashIntHash::getSize() - Returns the number of elements in the hash
- Функция QuickHashIntHash::loadFromFile() - This factory method creates a hash from a file
- Функция QuickHashIntHash::loadFromString() - This factory method creates a hash from a string
- Функция QuickHashIntHash::saveToFile() - This method stores an in-memory hash to disk
- Функция QuickHashIntHash::saveToString() - This method returns a serialized version of the hash
- QuickHashIntHash::set
- Функция QuickHashIntHash::update() - This method updates an entry in the hash with a new value
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