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The QuickHashIntHash class

Contents

(PECL quickhash >= Unknown)

Introduction

This class wraps around a hash containing integer numbers, where the values are also integer numbers. Hashes are also available as implementation of the ArrayAccess interface.

Hashes 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

QuickHashIntHash {
/* 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 [, int $value ] ) : bool
public __construct ( int $size [, int $options ] )
public delete ( int $key ) : bool
public exists ( int $key ) : bool
public get ( int $key ) : int
public getSize ( void ) : int
public static loadFromFile ( string $filename [, int $options ] ) : QuickHashIntHash
public static loadFromString ( string $contents [, int $options ] ) : QuickHashIntHash
public saveToFile ( string $filename ) : void
public saveToString ( void ) : string
public set ( int $key , int $value ) : bool
public update ( int $key , int $value ) : bool
}

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Predefined Constants

QuickHashIntHash::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.

QuickHashIntHash::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.

QuickHashIntHash::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.

QuickHashIntHash::HASHER_JENKINS1

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

QuickHashIntHash::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

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

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