12 Replies
do i have to do Trainer1? everywhere or is there a shortcut?
because everytime i want to use Trainer1 it needs a ?
i geuss and the last line gives a warning that i dont know how to fix
i am new to C# btw
? tells the compiler that field can be null, which in turn lets your IDE know it should be telling you to add null checks to your code.
First thing that I notice though is that all of your fields for Arena are static which isn't good.that is the task for school
all the vars in arena must be static
They probably are requiring static vars because they are easier to reason about when beginning, but it makes your code look unusual to experienced devs I think.
^ huge reg flag for me, but makes more sense in a beginner school assignment
you don't have to use
? when accessing your trainer fields, but it is a way to access properties and not cause exceptions if something is null.In most systems, the code is made up primarily of classes and there are patterns to ensure private fields are initialized when the class is constructed. Its an easier way to deal with the null syntax.
for example
If you are learning and finding the null reference handling annoying or confusing... you can also disable it.
Its useful in larger projects, but I find it annoying sometimes when prototyping or for quick one-off projects.
the reason i placed a ? is so the warning there went away
if you want to read more about it, you can look at this: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/operators/member-access-operators#null-conditional-operators--and-
Member access and null-conditional operators and expressions: - C#
C# operators that you use to access type members or null-conditionally access type members. These operators include the dot operator -
., indexers - [, ], ^ and .., and invocation - (, ).i will
Thanks