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<?php
declare(strict_types=1);
namespace Phpml\FeatureExtraction;
use Phpml\Exception\InvalidArgumentException;
class StopWords
{
/**
* @var array
*/
protected $stopWords = [];
public function __construct(array $stopWords)
$this->stopWords = array_fill_keys($stopWords, true);
}
public function isStopWord(string $token): bool
return isset($this->stopWords[$token]);
public static function factory(string $language = 'English'): self
$className = __NAMESPACE__."\\StopWords\\${language}";
if (!class_exists($className)) {
throw new InvalidArgumentException(sprintf('Can\'t find "%s" language for StopWords', $language));
return new $className();
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