JS Array to C# Array

Unity Engine
1

Ok, I am making the transition from JS (UnityScript) to C#, and I am wanting to know a quick and easy solution with this Array issue of mine. I am trying to convert this Array:

var someVar : Transform[] = [];

and

var someOtherVar : MyClass[] = [];

I have tried this:

public List<MyClass> someOtherVar = new List.<MyClass>();

But to no avail. In some cases I try this when I create a property for a class, not just for a local variable inside a function. This is the error I am getting: “error CS1519: Unexpected symbol `<’ in class, struct, or interface member declaration”

Please help with this, I know its something small I am missing. Thanks in advance.

(I am using this for referece Arrays)

2

You’re using a builtin array in JavaScript which is also available in C#. There’s no reason to create a List (which doesn’t have the . in C#)

public Transfrm[] someVar;

public MyClass[] someOtherVar;
3

Oh gosh, I feel silly now, ha.

So how do I set an initial value for it? In UnityScript:

var someVar[] = [];

But if I do this in C#:

public someVar[] = [];

I get an error “error CS1519: Unexpected symbol `[’ in class, struct, or interface member declaration”

Or do I not have to do this (adding square brackets)?

Again, sorry for asking such noobish question on this.

4

You don’t have to do that in either language. They’re empty by default.

5

You’re not providing a type in your C# version. There are a few initialization methods you can use.

// uninitialized array
public int[] MyInts;

// initialized to contain 10 null values
public MyClass[] Classes = new MyClass[10];

// initialized and given values
public int[] MyInts = new int[10] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
6

c#

Transform[] someVar = {}; // someVar is array with zero elements
//or
Transform[] someVar = new Transform[0]; // same as above
//or just
Transform[] someVar; // somevar is null



MyClass[] someOtherVar = {};
// or
MyClass[] someOtherVar = new MyClass[0];
// or even
List<MyClass> someOtherVar = new List<MyClass>();
7

Thanks for the replies. It helped me move forward, but I have come across something else now that I can’t seem to figure out.

How do I add and remove values to the array? In UnityScript, to add to an array I did:

var someVar : myClass[] = [];
someVar += [new myClass()];

…and to remove from the array was (I converted it to a normal array):

var arr : Array = new Array(someVar);
arr.RemoveAt(index);
myClass = arr.ToBuiltin(myClass);

But C# doesn’t have the Array class does it? Asking one last time for help on this :slight_smile:

8 
List<MyClass> someVar = new List<MyClass>();

// adding value:
someVar.Add(new MyClass());
// removing first value:
someVar.RemoveAt(0);
// removing last value:
someVar.RemoveAt(someVar.Count-1);
9

Thank you! That does it!