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    The LimitIterator class

    (PHP 5 >= 5.1.0)

    Вступ

    The LimitIterator class allows iteration over a limited subset of items in an Iterator.

    Короткий Огляд Класа

    LimitIterator extends IteratorIterator implements OuterIterator {
    /* Методи */
    public __construct ( Iterator $iterator [, int $offset = 0 [, int $count = -1 ]] )
    public mixed current ( void )
    public Iterator getInnerIterator ( void )
    public int getPosition ( void )
    public mixed key ( void )
    public void next ( void )
    public void rewind ( void )
    public int seek ( int $position )
    public bool valid ( void )
    }

    Приклади

    Приклад #1 LimitIterator usage example

    <?php

    // Create an iterator to be limited
    $fruits = new ArrayIterator(array(
            'apple',
            'banana',
            'cherry',
            'damson',
            'elderberry'
    ));

    // Loop over first three fruits only
    foreach (new LimitIterator($fruits, 0, 3) as $fruit) {
            var_dump($fruit);
    }

    echo     "\n";

    // Loop from third fruit until the end
    // Note: offset starts from zero for apple
    foreach (new LimitIterator($fruits, 2) as $fruit) {
            var_dump($fruit);
    }

    ?>

    Наведений вище приклад виведе:

    string(5) "apple"
string(6) "banana"
string(6) "cherry"

string(6) "cherry"
string(6) "damson"
string(10) "elderberry"

    Зміст

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    User Contributed Notes 1 note

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    christophg at grenz-bonn dot de
    2 years ago
    If the inner iterator implements SeekableIterator, LimitIterator uses seek() after rewind() to move to the offset.
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