Quickhash
PHP マニュアル

The QuickHashIntSet class

はじめに

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.

クラス概要

QuickHashIntSet
class QuickHashIntSet {
/* 定数 */
const int QuickHashIntSet::CHECK_FOR_DUPES = 1;
const int QuickHashIntSet::DO_NOT_USE_ZEND_ALLOC = 2;
const int QuickHashIntSet::HASHER_NO_HASH = 256;
const int QuickHashIntSet::HASHER_JENKINS1 = 512;
const int QuickHashIntSet::HASHER_JENKINS2 = 1024;
/* メソッド */
public bool add(int $key)
public __construct(int $size, int $options = ?)
public bool delete(int $key)
public bool exists(int $key)
publicint getSize()
public static QuickHashIntSet loadFromFile(string $filename, int $size = ?, int $options = ?)
public static QuickHashIntSet loadFromString(string $contents, int $size = ?, int $options = ?)
public void saveToFile(string $filename)
public string saveToString()
}

定義済み定数

QuickHashIntSet::CHECK_FOR_DUPES

If enabled, adding duplicate elements to a set (through either QuickHashIntSet::add or QuickHashIntSet::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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