c# - nameof() operator for static string -

-

i understand use of nameof() operator exception handling, logging, etc. not understand example below coming directly microsoft code. 

public static class sessionkeys {     public static class login     {                    public static string accesstoken = nameof(accesstoken);          public static string userinfo = nameof(userinfo);     } }

how more useful 

public static class sessionkeys {     public static class login     {         public static string accesstoken = "accesstoken";         public static string userinfo = "userinfo";     } }

nameof operator evaluated @ compile time, once application compiled there no difference between 2 solutions.

however, using nameof in case has few benefits:

  • it makes string value less “magic”. instead of being disconnected magic string, semantic reasoning behind value clear: it’s name of variable itself.
  • the name actual reference name, both connected. allows refactor either of them , automatically affect other one. makes “string” appear reference when looking references variable. know has been used.

Comments

Post a Comment

Popular posts from this blog

Django REST Framework perform_create: You cannot call `.save()` after accessing `serializer.data` -

-
i have following viewset: class artistprofileviewset(viewsets.modelviewset): queryset = artistprofile.objects.all() serializer_class = artistprofileserializer def perform_create(self, serializer): if serializer.is_valid(): serializer.save() with following serializers: class simpleartisttrackserializer(serializers.hyperlinkedmodelserializer): class meta: model = artisttrack fields = (...my fields...) class artistprofileserializer(serializers.hyperlinkedmodelserializer): owners = userserializer(many=true, required=false) tracks = simpleartisttrackserializer(many=true, required=false) class meta: model = artistprofile fields = (...my fields...) i getting following error: assertionerror: cannot call `.save()` after accessing `serializer.data`.if need access data before committing database inspect 'serializer.validated_data' instead. i don't see editing serializer.data object. th...
Read more

Why does Go error when trying to marshal this JSON? -

-
i'm trying rather simple example of trying decode json file structs using golang. however, when attempting error that json: cannot unmarshal object go value of type []main.track which don't understand. here's code in question, , json can found here . package main import ( "encoding/json" "fmt" "net/http" "os" ) // tracks group of track types type tracks struct { tracks []track } // track represents singular track type track struct { name string url string artist artist } // artist represents single artist type artist struct { name string mbid string url string } func main() { url := "http://ws.audioscrobbler.com/2.0/?method=geo.gettoptracks&api_key=c1572082105bd40d247836b5c1819623&format=json&country=netherlands" response, err := http.get(url) if err != nil { fmt.printf("%s\n", err) os.exit(1) } de...
Read more