The LimitIterator class

Einführung

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

Klassenbeschreibung

LimitIterator extends IteratorIterator implements OuterIterator , Traversable , Iterator {

/* Methoden */

__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 )

}

Beispiele

Beispiel #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);
}

?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

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

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

Inhaltsverzeichnis

LimitIterator::__construct — Construct a LimitIterator
LimitIterator::current — Get current element
LimitIterator::getInnerIterator — Get inner iterator
LimitIterator::getPosition — Return the current position
LimitIterator::key — Get current key
LimitIterator::next — Move the iterator forward
LimitIterator::rewind — Rewind the iterator to the specified starting offset
LimitIterator::seek — Seek to the given position
LimitIterator::valid — Check whether the current element is valid

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The LimitIterator class

Einführung

Klassenbeschreibung

Beispiele

Inhaltsverzeichnis