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4 changes: 2 additions & 2 deletions code/chapter18/usr.erl
Original file line number Diff line number Diff line change
Expand Up @@ -107,7 +107,7 @@ delete_usr(CustId) ->

%% @spec set_service(integer(), service(), bool()) -> ok | {error, instTime()}

-spec(set_service(integer(), service(), bool()) -> ok | {error, instTime()}).
-spec(set_service(integer(), service(), boolean()) -> ok | {error, instTime()}).

set_service(CustId, Service, Flag) ->
call({set_service, CustId, Service, Flag}).
Expand Down Expand Up @@ -162,7 +162,7 @@ lookup_msisdn(PhoneNo) ->

%% @spec service_flag(integer(), service()) -> bool() | {error, instance | disabled}

-spec(service_flag(integer(), service()) -> bool() | {error, instance | disabled}).
-spec(service_flag(integer(), service()) -> boolean() | {error, instance | disabled}).

service_flag(PhoneNo, Service) ->
case usr_db:lookup_msisdn(PhoneNo) of
Expand Down