Intialize String to Nothing or ""?

[Joe Duchtel]

Hello -

This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
.... or ...
Dim lDummy As String = ""

Thanks,
Joe

[sloan]

or

String.Empty ?
dim abc as string = string.Empty

I go with the string.Empty myself.


"Joe Duchtel" <du*****@gmail.comwrote in message
news:98**********************************@d23g2000 yqc.googlegroups.com...

Hello -

This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

Thanks,
Joe

[kimiraikkonen]

On Nov 20, 8:57*pm, Joe Duchtel <[e-mail]:

Hello -

This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

Thanks,
Joe

They are not the same. An empty string (String.Empty or "") is used to
assign an empty value to the variable. But setting it to "Nothing"
means no value is assigned to the variable(null reference), and same
as "Dim IDummy As String".

So, you need to choice what you'll do with the string in further
processing. I'd prefer to assign a value to it if you'll use that
instance in your project as well.

Also see this:
http://www.experts-exchange.com/Prog..._23787895.html
Hope this helps,

[Joe Duchtel]

On Nov 20, 2:13*pm, kimiraikkonen <[e-mail]:

On Nov 20, 8:57*pm, Joe Duchtel <[e-mail]:

Hello -

This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

Thanks,
Joe

They are not the same. An empty string (String.Empty or "") is used to
assign an empty value to the variable. But setting it to "Nothing"
means no value is assigned to the variable(null reference), and same
as "Dim IDummy As String".

So, you need to choice what you'll do with the string in further
processing. I'd prefer to assign a value to it if you'll use that
instance in your project as well.

Also see this:http://www.experts-exchange.com/Prog...NET/Visual_Bas...

Hope this helps,

Hello -

I cannot see the solutions in experts-exchange.com as I don't have a
subscription.

I do realize that Nothing means nothing but if I use Console.WriteLine
(lDummy) after I initialize it to Nothing, it will output an empty
string.

Thanks,
Joe

[kimiraikkonen]

On Nov 20, 9:49*pm, Joe Duchtel <[e-mail]:

On Nov 20, 2:13*pm, kimiraikkonen <[e-mail]:

On Nov 20, 8:57*pm, Joe Duchtel <[e-mail]:

Hello -

This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

Thanks,
Joe

They are not the same. An empty string (String.Empty or "") is used to
assign an empty value to the variable. But setting it to "Nothing"
means no value is assigned to the variable(null reference), and same
as "Dim IDummy As String".

So, you need to choice what you'll do with the string in further
processing. I'd prefer to assign a value to it if you'll use that
instance in your project as well.

Also see this:http://www.experts-exchange.com/Prog...NET/Visual_Bas...

Hope this helps,

Hello -

I cannot see the solutions in experts-exchange.com as I don't have a
subscription.

I'm not also their member. Just scroll down the page a bit more,
you'll see the whole discussion.

I do realize that Nothing means nothing but if I use Console.WriteLine
(lDummy) after I initialize it to Nothing, it will output an empty
string.

Thanks,
Joe-

Try that instead:

Console.WriteLine(IDummy.ToString) it'll throw a null reference
exception just like when you do the same in a MsgBox (MessageBox).

Again, by using "Dim IDummy As String", you are not assigning any
value to the variable. So, go with an empty string, preferably,
String.Empty.

Thanks,

Onur Güzel

[rowe_newsgroups]

I cannot see the solutions in experts-exchange.com as I don't have a

subscription.

Not worth it in my opinion - stick to USENET (here) or
StackOverflow.com if you think you'd like it better.

I do realize that Nothing means nothing but if I use Console.WriteLine
(lDummy) after I initialize it to Nothing, it will output an empty
string.

Yep, Console.WriteLine(...) actually uses string.Format(...) and is
smart enough to not blow up on nulls.

As for what I do, I use string.Empty.

Thanks,

Seth Rowe [MVP]
http://sethrowe.blogspot.com/

[Cholo Lennon]

kimiraikkonen wrote:

On Nov 20, 8:57 pm, Joe Duchtel <[e-mail]:

>Hello -

This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

Thanks,
Joe

They are not the same. An empty string (String.Empty or "") is used to
assign an empty value to the variable. But setting it to "Nothing"
means no value is assigned to the variable(null reference), and same
as "Dim IDummy As String".

So, you need to choice what you'll do with the string in further
processing. I'd prefer to assign a value to it if you'll use that
instance in your project as well.

Also see this:

http://www.experts-exchange.com/Prog...Basic.NET/Q_23
787895.html

>

Hope this helps,

Perhaps the OP is confused with the use of interfaces (due to way he named the
variable)

Regards
--
Cholo Lennon
Bs.As.
ARG

[Joe Duchtel]

On Nov 20, 3:59*pm, "Cholo Lennon" <[e-mail]:

kimiraikkonen wrote:

On Nov 20, 8:57 pm, Joe Duchtel <[e-mail]:

Hello -

This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

Thanks,
Joe

They are not the same. An empty string (String.Empty or "") is used to
assign an empty value to the variable. But setting it to "Nothing"
means no value is assigned to the variable(null reference), and same
as "Dim IDummy As String".

So, you need to choice what you'll do with the string in further
processing. I'd prefer to assign a value to it if you'll use that
instance in your project as well.

Also see this:

http://www.experts-exchange.com/Prog...NET/Visual_Bas...
787895.html

Hope this helps,

Perhaps the OP is confused with the use of interfaces (due to way he named the
variable)

Regards

--
Cholo Lennon
Bs.As.
ARG- Hide quoted text -

- Show quoted text -

Hello -

Okay ... what is wrong with the way I named the variable? This was
just a simple example and was not taken from actual code ... what am I
confused about?

Thanks,
Joe

[Jack Jackson]

On Thu, 20 Nov 2008 13:44:29 -0800 (PST), Joe Duchtel
<du*****@gmail.comwrote:

>On Nov 20, 3:59*pm, "Cholo Lennon" <[e-mail]:

>kimiraikkonen wrote:

On Nov 20, 8:57 pm, Joe Duchtel <[e-mail]:
Hello -

>This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

>Thanks,
Joe

They are not the same. An empty string (String.Empty or "") is used to
assign an empty value to the variable. But setting it to "Nothing"
means no value is assigned to the variable(null reference), and same
as "Dim IDummy As String".

So, you need to choice what you'll do with the string in further
processing. I'd prefer to assign a value to it if you'll use that
instance in your project as well.

Also see this:

http://www.experts-exchange.com/Prog...NET/Visual_Bas...
787895.html

Hope this helps,

Perhaps the OP is confused with the use of interfaces (due to way he named the
variable)

Regards

--
Cholo Lennon
Bs.As.
ARG- Hide quoted text -

- Show quoted text -

Hello -

Okay ... what is wrong with the way I named the variable? This was
just a simple example and was not taken from actual code ... what am I
confused about?

Thanks,
Joe

I think Cholo thought you named the variable IDummy instead of lDummy.
The convention is to name Interfaces starting with I.

[Cholo Lennon]

Joe Duchtel wrote:

On Nov 20, 3:59 pm, "Cholo Lennon" <[e-mail]:

>kimiraikkonen wrote:

>>On Nov 20, 8:57 pm, Joe Duchtel <[e-mail]:
Hello -

>>>This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

>>>Thanks,
Joe

>>They are not the same. An empty string (String.Empty or "") is used
to assign an empty value to the variable. But setting it to
"Nothing"
means no value is assigned to the variable(null reference), and same
as "Dim IDummy As String".

>>So, you need to choice what you'll do with the string in further
processing. I'd prefer to assign a value to it if you'll use that
instance in your project as well.

>>Also see this:

http://www.experts-exchange.com/Prog...NET/Visual_Bas...
787895.html

>>Hope this helps,

Perhaps the OP is confused with the use of interfaces (due to way he
named the variable)

Regards

--
Cholo Lennon
Bs.As.
ARG- Hide quoted text -

- Show quoted text -

Hello -

Okay ... what is wrong with the way I named the variable? This was
just a simple example and was not taken from actual code ... what am I
confused about?

Well... Jack gave you the answer about my suposition. BTW if you used "1" instead of "I" then you're wrong... you cannot start an
identifier with a number.

Regards

--
Cholo Lennon
Bs.As.
ARG

[Joe Duchtel]

On Nov 20, 9:09*pm, "Cholo Lennon" <[e-mail]:

Joe Duchtel wrote:

On Nov 20, 3:59 pm, "Cholo Lennon" <[e-mail]:

kimiraikkonen wrote:
On Nov 20, 8:57 pm, Joe Duchtel <[e-mail]:
Hello -

>>This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

>>Thanks,
Joe

>They are not the same. An empty string (String.Empty or "") is used
to assign an empty value to the variable. But setting it to
"Nothing"
means no value is assigned to the variable(null reference), and same
as "Dim IDummy As String".

>So, you need to choice what you'll do with the string in further
processing. I'd prefer to assign a value to it if you'll use that
instance in your project as well.

>Also see this:

>http://www.experts-exchange.com/Prog...NET/Visual_Bas....
787895.html

>Hope this helps,

Perhaps the OP is confused with the use of interfaces (due to way he
named the variable)

Regards

--
Cholo Lennon
Bs.As.
ARG- Hide quoted text -

- Show quoted text -

Hello -

Okay ... what is wrong with the way I named the variable? *This was
just a simple example and was not taken from actual code ... what am I
confused about?

Well... Jack gave you the answer about my suposition. BTW if you used "1"instead of "I" then you're wrong... you cannot start an
identifier with a number.

Regards

--
Cholo Lennon
Bs.As.
ARG- Hide quoted text -

- Show quoted text -

Hello -

I used a lower-case "L" sinde the variable is a local variable. This
is per our coding standard. I know people will disagree with that but
that's the reason.

Thanks!
Joe

[Cholo Lennon]

Joe Duchtel wrote:

On Nov 20, 9:09 pm, "Cholo Lennon" <[e-mail]:

>Joe Duchtel wrote:

>>On Nov 20, 3:59 pm, "Cholo Lennon" <[e-mail]:
kimiraikkonen wrote:
On Nov 20, 8:57 pm, Joe Duchtel <[e-mail]:
>Hello -

>>>>>This might be a silly question but I was wondering if there is
>"a" preferred way of initializing a String ... so either ...
>Dim lDummy As String = Nothing
>... or ...
>Dim lDummy As String = ""

>>>>>Thanks,
>Joe

>>>>They are not the same. An empty string (String.Empty or "") is
used to assign an empty value to the variable. But setting it to
"Nothing"
means no value is assigned to the variable(null reference), and
same as "Dim IDummy As String".

>>>>So, you need to choice what you'll do with the string in further
processing. I'd prefer to assign a value to it if you'll use that
instance in your project as well.

>>>>Also see this:

>>>http://www.experts-exchange.com/Prog...NET/Visual_Bas...
787895.html

>>>>Hope this helps,

>>>Perhaps the OP is confused with the use of interfaces (due to way
he named the variable)

>>>Regards

>>>--
Cholo Lennon
Bs.As.
ARG- Hide quoted text -

>>>- Show quoted text -

>>Hello -

>>Okay ... what is wrong with the way I named the variable? This was
just a simple example and was not taken from actual code ... what
am I confused about?

Well... Jack gave you the answer about my suposition. BTW if you
used "1" instead of "I" then you're wrong... you cannot start an
identifier with a number.

Regards

--
Cholo Lennon
Bs.As.
ARG- Hide quoted text -

- Show quoted text -

Hello -

I used a lower-case "L" sinde the variable is a local variable. This
is per our coding standard. I know people will disagree with that but
that's the reason.

Ok, I have to change the font of my newsreader, it's terrible :-P

Regards

--
Cholo Lennon
Bs.As.
ARG

[Herfried K. Wagner [MVP]]

"Joe Duchtel" <du*****@gmail.comschrieb:

This might be a silly question but I was wondering if there is "a"
preferred way of initializing a String ... so either ...
Dim lDummy As String = Nothing
... or ...
Dim lDummy As String = ""

I prefer to let the compiler initize it with its default value (which is a
reference to 'Nothing' by default):

\\\
Dim lDummy As String
///

(BTW, I have disabled the BC42104 warning because I believe it does not make
sense.)

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>