public function execute(array $arguments) {
		if (empty($arguments)) throw new \BadFunctionCallException("Cdr: No parameters found.");
		list($list) = $arguments;
		
		if (is_array($list)) {
			if (empty($list)) return null;
			return array_slice($list, 1);
		}
		
		if ($list instanceof \Iterator || $list instanceof \IteratorAggregate) {
			$it = $list instanceof \Iterator ? $list : $list->getIterator();
			$it->rewind();
			//empty list?
			if (!$it->valid()) return null;
			$result = [];
			for ($it->next(); $it->valid(); $it->next())
				$result[] = $it->current();
			return $result;
		}
		
		throw new \InvalidArgumentException('Cdr: Parameter is not a list.');
	}
public function execute(array $arguments) {
		if (empty($arguments)) throw new \BadFunctionCallException("Cdr: No parameters found.");
		list($list) = $arguments;
		
		if (is_array($list)) {
			if (empty($list)) return null;
			return array_slice($list, 1);
		}
		
		if ($list instanceof \Iterator || $list instanceof \IteratorAggregate) {
			$it = $list instanceof \Iterator ? $list : $list->getIterator();
			$it->rewind();
			//empty list?
			if (!$it->valid()) return null;
			$result = [];
			for ($it->next(); $it->valid(); $it->next())
				$result[] = $it->current();
			return $result;
		}
		
		throw new \InvalidArgumentException('Cdr: Parameter is not a list.');
	}
Returns a list without its first element
Usage: (Array::cdr (array 1 2 3))
Returns: array
(non-PHPdoc)
@see \eMacros\Runtime\GenericFunction::execute()