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The QuickHashIntSet class

Contents

(PECL quickhash >= Unknown)

Introduction

This class wraps around a set containing integer numbers.

Sets can also be iterated over with foreach as the Iterator interface is implemented as well. The order of which elements are returned in is not guaranteed.

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Class synopsis

QuickHashIntSet {
/* Constants */
const integer CHECK_FOR_DUPES = 1 ;
const integer DO_NOT_USE_ZEND_ALLOC = 2 ;
const integer HASHER_NO_HASH = 256 ;
const integer HASHER_JENKINS1 = 512 ;
const integer HASHER_JENKINS2 = 1024 ;
/* Methods */
public add ( int $key ) : bool
public __construct ( int $size [, int $options ] )
public delete ( int $key ) : bool
public exists ( int $key ) : bool
publicgetSize ( void ) : int
public static loadFromFile ( string $filename [, int $size [, int $options ]] ) : QuickHashIntSet
public static loadFromString ( string $contents [, int $size [, int $options ]] ) : QuickHashIntSet
public saveToFile ( string $filename ) : void
public saveToString ( void ) : string
}

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Predefined Constants

QuickHashIntSet::CHECK_FOR_DUPES

If enabled, adding duplicate elements to a set (through either add() or loadFromFile()) will result in those elements to be dropped from the set. This will take up extra time, so only used when it is required.

QuickHashIntSet::DO_NOT_USE_ZEND_ALLOC

Disables the use of PHP's internal memory manager for internal set structures. With this option enabled, internal allocations will not count towards the memory_limit settings.

QuickHashIntSet::HASHER_NO_HASH

Selects to not use a hashing function, but merely use a modulo to find the bucket list index. This is not faster than normal hashing, and gives more collisions.

QuickHashIntSet::HASHER_JENKINS1

This is the default hashing function to turn the integer hashes into bucket list indexes.

QuickHashIntSet::HASHER_JENKINS2

Selects a variant hashing algorithm.

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Document created the 30/01/2003, last modified the 26/10/2018
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References

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