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  • QuickHashIntSet::__construct()

    (PECL quickhash >= Unknown)

    Creates a new QuickHashIntSet object

    说明

    publicQuickHashIntSet::__construct(int $size[,int $options])

    This constructor creates a new QuickHashIntSet. 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.

    参数

    $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 4 to 4194304.

    $options

    The options that you can pass in are: QuickHashIntSet::CHECK_FOR_DUPES, which makes sure no duplicate entries are added to the set; QuickHashIntSet::DO_NOT_USE_ZEND_ALLOC to not use PHP's internal memory manager as well as one of QuickHashIntSet::HASHER_NO_HASH, QuickHashIntSet::HASHER_JENKINS1 or QuickHashIntSet::HASHER_JENKINS2. These last three configure which hashing algorithm to use. All options can be combined using bitmasks.

    返回值

    Returns a new QuickHashIntSet object.

    范例

    Example #1 QuickHashIntSet::__construct() example

    <?php
    var_dump( new QuickHashIntSet( 1024 ) );
    var_dump( new QuickHashIntSet( 1024, QuickHashIntSet::CHECK_FOR_DUPES ) );
    var_dump(
        new QuickHashIntSet(
            1024,
            QuickHashIntSet::DO_NOT_USE_ZEND_ALLOC | QuickHashIntSet::HASHER_JENKINS2 
        )
    );
    ?>