Returns an iterator which will return the elements mapped by
the supplied functions or the original if no function is supplied.
| public projectionIterator ( Traversable $iterator, callable $keyProjectionFunction = null, callable $valueProjectionFunction = null ) : Pinq\Iterators\IWrapperIterator | ||
| $iterator | Traversable | |
| $keyProjectionFunction | callable | |
| $valueProjectionFunction | callable | |
| Результат | Pinq\Iterators\IWrapperIterator | |
private function mapIterator(callable $function = null)
{
if ($function === null) {
return $this->elements;
} else {
return $this->scheme->projectionIterator($this->elements, null, $function);
}
}
/**
* @dataProvider orderedMaps
*/
public function testThatOrderedMapUsesTheLastValueForAnAssociatedKey(IOrderedMap $orderedMap, IIteratorScheme $scheme)
{
$iterator = $scheme->projectionIterator($scheme->arrayIterator(range(0, 10)), function () {
return null;
}, null);
$orderedMap = $scheme->createOrderedMap($iterator);
$this->assertCount(1, $orderedMap);
$this->assertSame(10, $orderedMap[null]);
}
