QuickHashIntSet::exists
(PECL quickhash >= Unknown)
QuickHashIntSet::exists — This method checks whether a key is part of the set
Description
public bool QuickHashIntSet::exists
( int
$key
)This method checks whether an entry with the provided key exists in the set.
Parameters
-
key -
The key of the entry to check for whether it exists in the set.
Return Values
Returns TRUE when the entry was found, or FALSE when the entry is not
found.
Examples
Example #1 QuickHashIntSet::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 set: ", microtime( true ), "\n";
$set = new QuickHashIntSet( 100000 );
echo "Adding elements: ", microtime( true ), "\n";
foreach( $existingEntries as $key )
{
$set->add( $key );
}
echo "Doing 1000 tests: ", microtime( true ), "\n";
foreach( $testForEntries as $key )
{
$foundCount += $set->exists( $key );
}
echo "Done, $foundCount found: ", microtime( true ), "\n";
?>
The above example will output something similar to:
Creating set: 1263588703.0748 Adding elements: 1263588703.0757 Doing 1000 tests: 1263588703.7851 Done, 898 found: 1263588703.7897
- PHP Руководство
- Функции по категориям
- Индекс функций
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- Расширения, относящиеся к переменным и типам
- Quickhash
- Функция QuickHashIntSet::add() - This method adds a new entry to the set
- Функция QuickHashIntSet::__construct() - Creates a new QuickHashIntSet object
- Функция QuickHashIntSet::delete() - This method deletes an entry from the set
- Функция QuickHashIntSet::exists() - This method checks whether a key is part of the set
- Функция QuickHashIntSet::getSize() - Returns the number of elements in the set
- Функция QuickHashIntSet::loadFromFile() - This factory method creates a set from a file
- Функция QuickHashIntSet::loadFromString() - This factory method creates a set from a string
- Функция QuickHashIntSet::saveToFile() - This method stores an in-memory set to disk
- Функция QuickHashIntSet::saveToString() - This method returns a serialized version of the set
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