Return positions

main.rb

@@ -168,18 +168,16 @@ public
     end.freeze
   end
 
-  ##
-  # @return [Array<Array(String, String, Array<Integer>)>]
-  #
   def examples(word_id)
     word_id = Integer word_id
 
-    result = @db_conn.exec_params(
+    @db_conn.exec_params(
       (
         <<~SQL
           SELECT
             array_agg(foo.value ORDER BY foo.language_id DESC)::text[]
               AS values,
+            array_agg(word_forms.len) AS lens,
             array_agg(word_form_example_texts.pos) AS positions
           FROM example_texts foo
           LEFT JOIN word_form_example_texts
@@ -217,8 +215,12 @@ public
         SQL
       ),
       [word_id],
-    ).map { |row| [*row['values'], row['positions'].compact.freeze] }
-
-    result.map { |pair| pair.map(&:freeze).freeze }.freeze
+    ).map do |row|
+      {
+        values: row['values'].map(&:freeze).freeze,
+        length: row['lens'].compact.first,
+        positions: row['positions'].compact.freeze,
+      }.freeze
+    end.freeze
   end
 end