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Matej Lukášik
27,440 PointsDynamic Typing Code Challenge Unsolved :-(
Can anyone help me with this code challenge? https://teamtreehouse.com/library/dynamic-typing
It goes like this: "Declare a variable named "thing" of type 'id' and initialize it to 'nil'."
This works in Xcode:objective-c
id thing = @[@"nil"];
This works in Xcode:objective-c
id thing = @"nil";
but when I submit it to the Code Challenge, it says:"Bummer! Did you declare the variable 'thing' and set it to 'nil'?"
What am I doing wrong and how should I solve this challenge?
3 Answers
Holger Liesegang
50,595 PointsHi Matej, try using id without @ as it is already implicit.
Raissa de Guzman
645 PointsHi Matej, When you set it up as id thing = @"nil"; you actually defined |thing| as a string object with the value "nil" (i.e. the string, "nil") and not the actual nil value :)
id thing = @"nil" works on x-code because |id| can be passed any type of object; therefore, it is syntactically correct and will compile.
Matej Lukášik
27,440 PointsThanks a lot! This worked: id thing = nil; btw, what does that @ stand for? what does it say? yup, I'm a beginner :-)
Véronique Bellamy
20,810 PointsWhen someone answers your question and helps you resolve the problem, please choose a "Best Answer". This way, the person who gave you the answer gets extra points and it encourages participation.
Oh, and welcome to Treehouse. ;)
Holger Liesegang
50,595 PointsHi Jessica, congrats for your new status as a moderator :-)
Véronique Bellamy
20,810 PointsThanks. ^_^;;