lib/gogo_csv/array.rb in gogo_csv-0.0.3 vs lib/gogo_csv/array.rb in gogo_csv-0.0.4

@@ -7,9 +7,13 @@
       CSV.open(File.expand_path(path), "wb") do |csv|
         each { |ary| csv <<  ary }
       end
     end
 
+    def map_cal(from_num, to_num=from_num, &blk)
+      map { |row| row[to_num] = blk.(row[from_num]) }
+    end
+
     private
 
       def arys?
         all? { |item| item.is_a?(Array) }
       end