Returns an iterator which will return only the first associated value
for any key.
| public uniqueKeyIterator ( Traversable $iterator ) : Pinq\Iterators\IWrapperIterator | ||
| $iterator | Traversable | |
| Результат | Pinq\Iterators\IWrapperIterator | |
public function indexBy(callable $function)
{
return $this->constructScopedSelf($this->scheme->uniqueKeyIterator($this->scheme->projectionIterator($this->elements, $function, null)));
}
