Instance Variable in Static Method

[thomson]

Hi All,
In a Singleton pattern , if we create an instance
variable, and return it, whether this one also be a static variable ,
Can anyone give me insights on the Memory allocation

Thanks in Advance

thomson

[Greg Young]

I am having a bit of trouble understanding the question but ..

are you asking the memory differences between

public class Singleton {
private something Foo;
public something GetFoo() {
return Foo;
}
//singleton stuff
}

and

public class SomeStaticClass {
public static something Foo;
}

they are pretty much identical performance wise if you already have a
reference to the singleton .. the access to the data internally is slightly
different but not enough that you should be worried about it.

Cheers,

Greg Young
MVP - C#
"thomson" <sa**********@yahoo.com> wrote in message
news:11**********************@v46g2000cwv.googlegr oups.com...

Hi All,
In a Singleton pattern , if we create an instance
variable, and return it, whether this one also be a static variable ,
Can anyone give me insights on the Memory allocation

Thanks in Advance

thomson

[Greg Young]

Hit send too quickly ..

This is a great case of using what makes sense with the design .. there is
very little performance to be gained/lost here.

Cheers,

Greg Young
MVP - C#
"thomson" <sa**********@yahoo.com> wrote in message
news:11**********************@v46g2000cwv.googlegr oups.com...

Hi All,
In a Singleton pattern , if we create an instance
variable, and return it, whether this one also be a static variable ,
Can anyone give me insights on the Memory allocation

Thanks in Advance

thomson

[thomson]

Hi Greg,
if i have an instance variable inside the static
method, will it be a static variable?

[William Stacey [MVP]]

With a static method, there is no instance(s) unless you pass one to the
method. There is only the static type and its static members. You can
define a local var in a static method, but that is a local variable with
local scope; not a static or instance field.

--
William Stacey [MVP]

"thomson" <sa**********@yahoo.com> wrote in message
news:11**********************@u72g2000cwu.googlegr oups.com...
| Hi Greg,
| if i have an instance variable inside the static
| method, will it be a static variable?
|

[Altaf Al-Amin Najwani]

I think Inside Method .. whether its static or not all variables are local
variables and treated as Instance Varible .. oh yes scenerio can become
interesting if you ask that u r passing some variable to static method ..
what will be the effect if it is passed by value and passed by reference.
Cheers

"thomson" wrote:

Hi Greg,
if i have an instance variable inside the static
method, will it be a static variable?

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

"thomson" <sa**********@yahoo.com> wrote in message
news:11**********************@u72g2000cwu.googlegr oups.com...

Hi Greg,
if i have an instance variable inside the static
method, will it be a static variable?

I think you are confusing the terms "instance variable" and "local
variable".

Instance variable has an instance scope, all the methods of the instance
can access it, it's created once when the instance is created and is
destroyed when the instance is GC-ed. It's stored in the same memory than
the instance itself.

A local variable is declared inside a method, it's ALWAYS created in the
stack and is create EACH TIME the method is executed. it's destroyed when
the method finish. It's not accesible from another method and do not persist
between method invocations.

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation