Php/docs/class.quickhashinthash

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(PECL quickhash >= Unknown)

简介

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.


类摘要


QuickHashIntHash {

/* Constants */

const int CHECK_FOR_DUPES = 1

const int DO_NOT_USE_ZEND_ALLOC = 2

const int HASHER_NO_HASH = 256

const int HASHER_JENKINS1 = 512

const int 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 ( ) : int

public static loadFromFile ( string $filename [, int $options ] ) : QuickHashIntHash

public static loadFromString ( string $contents [, int $options ] ) : QuickHashIntHash

public saveToFile ( string $filename ) : void

public saveToString ( ) : string

public set ( int $key , int $value ) : bool

public update ( int $key , int $value ) : bool

}

预定义常量

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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