QuickHashIntSet::exists
(PECL quickhash >= Unknown)
QuickHashIntSet::exists — This method checks whether a key is part of the set
说明
public
QuickHashIntSet::exists (
int
$key ) :
bool
This method checks whether an entry with the provided key exists in the set.
参数
-
key -
The key of the entry to check for whether it exists in the set.
返回值
Returns TRUE when the entry was found, or FALSE when the entry is not found.
范例
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";
?>
以上例程的输出类似于：
Creating set: 1263588703.0748 Adding elements: 1263588703.0757 Doing 1000 tests: 1263588703.7851 Done, 898 found: 1263588703.7897
