are types initializes by default?

[Boni]

Dear all,

 

[Armin Zingler]

Dear all,
----
class myA
..
end class
dim oA as myA

As long as it is not anything, it is nothing.


Armin

 

[Brian Henry]

an object must be instanciated to access it. If you do not instanciate it,
it's value will be nothing. Only objects with shared methods, data, or
properties will be accessable with out instanciation in a class like that.

 

[Siva M]

Unless oA is assigned a valid reference, it will be Nothing.

Dear all,

 

[Boni]

the question was "is it guaranted?". Is it written somewhere in the .NET
spec, that uninitialized variables are nothing?

 

[Cor Ligthert [MVP]]

Armin,

As long as it is not anything, it is nothing.

I don't know why however I find "Something" nicer.



Cor

 

[Cor Ligthert [MVP]]

Siva,

The "New" keyword initializes an object with the value from the type you
tell that it has to be initialized with.

dim a as myOwnClass 'a is an address where in is no reference to an object.
dim a as New MyOwnClass' is initialised accoording the "Sub new" in that
class and/or only with default values/objects from that class.

I hope this helps,

Cor

 

[Tom Shelton]

the question was "is it guaranted?". Is it written somewhere in the .NET
spec, that uninitialized variables are nothing?

I'd have to check, but I don't believe that it is guarenteed by the .NET
spec... That is a VB.NET guarentee. For example, in C# Class level
variables are intitialized to their defaults - but locally scoped
variables are not.