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by: Pablo J Royo |
last post by:
Hello:
i have a function that reads a file as an argument and returns a reference
to an object that contains some information obtained from the file: FData
&ReadFile(string FilePath);
But , for example, when the file doesnt exists, i should not return any
reference to a bad constructed object, so i need something as a NULL
reference object. I suppose i could return a pointer instead, but i have
some code written with references which...
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by: arvee |
last post by:
Hi - I'm updating an Oracle table with an empty string and getting the
error:
An unhandled exception of type 'System.Exception' occurred in
system.data.dll
Additional information: Parameter 'p1': No size set for variable length data
type: String.
The column is nullable and of type varchar2(50). I'm aware that I can store
DBNull.Value instead and Oracle won't complain, but, I was hoping to avoid
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by: Don Vaillancourt |
last post by:
What's going on with Javascript.
At the beginning there was the "undefined" value which represented an
object which really didn't exist then came the null keyword. But
yesterday I stumbled across "null" string.
I know that I will get an "undefined" when I try to retrieve something
from the DOM which doesn't exist.
I have used null myself to initialize or reset variables. But in which
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by: maniac |
last post by:
Hey guys, I'm new here, just a simple question.
I'm learning to Program in C, and I was recommended a book called,
"Mastering C Pointers", just asking if any of you have read it,
and if it's worth the $25USD.
I'm just looking for a book on Pointers, because from what I've
read it's one of the toughest topics to understand.
thanks in advanced.
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by: Steph |
last post by:
I am trying to save a simple integer value in ViewState. I set the
value in the Page_Load() event and retrieve it in the function
Page_Unload() event. The value seems to be set correctly, but upon
the next Page_Load(), I get the following error when I try to retrieve
the value from ViewState:
"function 'ViewState.get_Item' evaluated and returned null".
The page does have a form on it with the runat="server" attribute set.
From the...
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by: Dmitriy Lapshin [C# / .NET MVP] |
last post by:
Hi all,
I think the VB .NET compiler should at least issue a warning when a function
does not return value. C# and C++ compilers treat this situation as an error
and I believe this is the right thing to do. And I wonder why VB .NET keeps
silence and makes such function return some default value instead. Isn't it
error-prone?
--
Dmitriy Lapshin
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by: marcwentink |
last post by:
Dear Sirs, Dear Newsgroup,
Imagine I have some function that only gives me an iterator to a
vector, but not the vector itself. Unfortunately this vector can be
empty and the iterator can point to 'non valid'.
Yes I know this is rather silly, but I did not write the code...
Normally I know you would check for "iterator != vector.end()", but
since I do not seem to have the vector without changing a lot of old
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by: Jeff |
last post by:
Hey
I've bought the book "ASP.NET 2.0 website programming, Problem, Design,
Solution" and some of its code examples is this code:
protected static string ConvertNullToEmptyString(string input)
{
return (input == null ? "" : input);
}
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by: Steven T. Hatton |
last post by:
I'm trying to improve my formal understanding of C++. One significant part
of that effort involves clarifying my understanding of the vocabulary used
to describe the language.
This is from the C++ Standard:
""
"...sequence of operators and operands that specifies a computation...".
That means to me that an expression can be "executed". I am purposely
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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