/**
* {@inheritDoc}
*/
public final function valid()
{
return $this->_seq->valid();
}
function groupJoinResultSelectorFunc(Person $person, IEnumerable $pets) : string
{
$petList = $pets->select(function (Pet $pet) {
return $pet->Name;
})->toArray();
return sprintf('Owner: %s; Pets: "%s"', $person->Name, implode('", "', $petList));
}
/**
* Initializes a new instance of that class.
*
* @param mixed $previousValue The value that was set via IItemContext::nextValue() in the context of
* the previous item.
*
* @param IEnumerable $seq The underlying sequence.
*/
public function __construct(IEnumerable $seq, $previousValue = null)
{
$this->_seq = $seq;
$this->_previousValue = $previousValue;
$this->_key = $this->_seq->key();
$this->_item = $this->_seq->current();
}
/**
* Checks a sequence if it has an expected list of same values (in the same order).
*
* @param IEnumerable $seq The sequence.
* @param array $expected The expected values.
* @param bool $exact Check values exactly or not.
*/
protected function checkForExpectedValues(IEnumerable $seq, array $expected = [], bool $exact = true)
{
foreach ($expected as $index => $ev) {
$seq->reset();
$count = $index;
while ($count-- > 0 && $seq->valid()) {
$seq->next();
}
$av = $seq->current();
if ($exact) {
$this->assertSame($ev, $av);
} else {
$this->assertEquals($ev, $av);
}
}
}
/**
* Resets that sequence.
*
* @param bool $resetSequence Reset inner sequence or not.
*/
protected function resetMe(bool $resetSequence = true)
{
if ($resetSequence) {
$this->_sequence->reset();
}
$selector = $this->_selector;
// prepare items before ...
$items = $this->_sequence->select(function ($x, IItemContext $ctx) use($selector) {
$result = new \stdClass();
$result->key = $ctx->key();
$result->sortBy = $selector($x, $ctx);
$result->value = $x;
return $result;
})->toArray();
$comparer = $this->_comparer;
\uasort($items, function (\stdClass $x, \stdClass $y) use($comparer) : int {
return $comparer($x->sortBy, $y->sortBy);
});
$this->_i = static::createEnumerable($items)->withNewKeys('($key, $item) => $item->key')->select('$x => $x->value');
}
