lib/kuromoji/core.rb in kuromoji-ruby-0.0.2 vs lib/kuromoji/core.rb in kuromoji-ruby-0.0.3

@@ -35,23 +35,25 @@
     def reading(sentence)
       process(:getReading, sentence)
     end
 
     def tokenize_with_hash(sentence)
+      result = []
+      return result if sentence.nil?
       list = @tokenizer.tokenize(sentence)
       iterator = list.iterator
-      result = []
       while iterator.has_next
         item = iterator.next
         result << item.to_kuromoji_hash
       end
       result
     end
 
     def process(method, sentence)
+      tokenized = {}
+      return tokenized if sentence.nil?
       list = @tokenizer.tokenize(sentence)
       iterator = list.iterator
-      tokenized = {}
       while iterator.has_next
         item = iterator.next
         tokenized[item.surface_form] = item.send(method)
       end
       tokenized
\ No newline at end of file