lib/meibo/data_set.rb in meibo-0.14.0 vs lib/meibo/data_set.rb in meibo-0.15.0

@@ -40,9 +40,14 @@
       data_by_sourced_id.fetch(sourced_id)
     rescue KeyError
       raise DataNotFoundError, "sourcedId: #{sourced_id} が見つかりません"
     end
 
+    def lineno(datum)
+      # NOTE: add one for one-based, and add one for header line
+      find_index(datum)&.+(2)
+    end
+
     def where(**conditions)
       group_cache[conditions.keys.sort][conditions.values]
     end
 
     private