Problem seems to be with parenthesis. Enclose inner expression in parenthesis, as shown below:
``` scala ```
``` map + (k -> (map.getOrElse(k, 0) + 1)) ```
Other post that you mentioned had different problem. In that post, `Int` was used as type parameter, which is not the case here.

Problem seems to be with parenthesis. Enclose inner expression in parenthesis, as shown below:
map + (k -> (map.getOrElse(k, 0) + 1))
Other post that you mentioned had different problem. In that post, `Int` was used as type parameter, which is not the case here.