QuickHashIntStringHash::__construct
(PECL quickhash >= Unknown)
QuickHashIntStringHash::__construct — Creates a new QuickHashIntStringHash object
説明
This constructor creates a new QuickHashIntStringHash. The size is the amount of bucket lists to create. The more lists there are, the less collisions you will have. Options are also supported.
パラメータ
size
-
The amount of bucket lists to configure. The number you pass in will be automatically rounded up to the next power of two. It is also automatically limited from
64
to4194304
. options
-
The options that you can pass in are:
QuickHashIntStringHash::CHECK_FOR_DUPES
, which makes sure no duplicate entries are added to the hash;QuickHashIntStringHash::DO_NOT_USE_ZEND_ALLOC
to not use PHP's internal memory manager as well as one ofQuickHashIntStringHash::HASHER_NO_HASH
,QuickHashIntStringHash::HASHER_JENKINS1
orQuickHashIntStringHash::HASHER_JENKINS2
. These last three configure which hashing algorithm to use. All options can be combined using bitmasks.
戻り値
Returns a new QuickHashIntStringHash object.
例
例1 QuickHashIntStringHash::__construct() example
<?php
var_dump( new QuickHashIntStringHash( 1024 ) );
var_dump( new QuickHashIntStringHash( 1024, QuickHashIntStringHash::CHECK_FOR_DUPES ) );
var_dump(
new QuickHashIntStringHash(
1024,
QuickHashIntStringHash::DO_NOT_USE_ZEND_ALLOC | QuickHashIntStringHash::HASHER_JENKINS2
)
);
?>