ASCII Value for Nothing
Is there an ascii value I can put into a char in C++, that represents nothing? I tried 0 but it ends up screwing up my file so I cant read it.., thanks. ...
nothing
Webbrowser control's window.external is ALWAYS null
The Web browser's Window.External object is always null! To reproduce drop a web browser on a new winform and type: Option Strict Off Public Class Form1 Private Sub Form1_Load() Handles MyBase.LoadMe.WebBrowser1.Document.Window.DomWindow.External.AddFavorite("http://www.google.com") End Sub End Class Make certain you...
Check for Nothing in vbscript/classic asp
I need to update an old classic asp, and I have to call a function that normally returns an array, but under certain circumstances might return either Nothing or an undefined value. How can I check that the result actually returns an array? ...
How to tell whether a variable has been initialized in C#?
Hello, I know this is a dumb question and I guess it must have been asked before. However I am unable to find an answer to my question. Here is some sample code (which of course does not compile) to outline my problem: class test { int[] val1; string val2; static bool somefunction(test x, test y) { dosome...
VB.NET Byte Problem
I am porting some c# code to vb.net, currently trying to figure out how to do this.. byte isEndReached = //get some data if (isEndReached != 0) { for (int y = 0; y < isEndReached ; y++) { //do some stuff } } My attempt: Dim isEndReached As Byte = ''//getsomedata If Not isEndReached Is Nothing Then For y As Byte = ...
If the Nothing type is at the bottom of the class hierarchy, why can I not call any conceivable method on it?
The scala type Nothing represents (as I understand it) the bottom of the type hierarchy, also denoted by the symbol ⊥. That is, Nothing is a sub-type of any given type. The requirement for a Nothing type is explained well by James Iry for those of us without a theoretical background in type theory! So my question is, if Nothing is a sub...
PHP ftp_connect does nothing
Hi, I've configured a couple of php codes that connects to my server with the use of ftp connect. It works perfectly when I'm testing it locally, it connects, it goes in, i can access stuff. BUT when I upload it online and try it there. The php code does nothing. It executes all lines before "ftp_connect" then from that line onwards, i...
Convert String.Empty to Nothing/Null
Is there a .Net function that does that. I guess if there isn't i have to make my own method. The thing is i have a function. It accepts integers. If you pass a 0 integer or a null value it still works. Problem is that the value of an empty textbox is a String.Empty value. I don't want to use if's. I mean it could but its much nicer i...
Nothing = String.Empty (Why are these equal?)
Why does the first if statement evaluate to true? I know if I use "is" instead of "=" then it won't evaluate to true. If I replace String.Empty with "Foo" it doesn't evaluate to true. Both String.Empty and "Foo" have the same type of String, so why does one evaluate to true and the other doesn't? //this evaluates to true If N...
Setting DataReader = nothing
Hi all, In my project I have seen that at many places developer has just nullify the DataReader object after use and hasn't close or dispose.. I want to know the advace effect of doing so, I mean nullifying the datareader and not closeing them. Thanks and Regards, Tanmay. ...
vb.net string of nulls
I have a string value read in from a CSV file. The CSV file contains 7 NULL bytes, I have confirmed this by opening it in a hex editor and sure enought there are 7 0x0 bytes in there. This string is causing me pain. In vb.net when I check the strlen of this string it returns a value of 7 and if i do a String.IsNullOrWhitespace it return...
VB.NET Structs and Nothing - problems.
I'm having some headaches using Structures and functions that return Nothing in VB.NET. Let me try to explain here with this code: Public Class Form1 Structure Test Dim field1 As String End Structure Private Function Foo() As Test Return Nothing End Function Private Sub Form1_Load(ByVal sender As ...
Under what conditions is inferring Nothing desirable?
In my own code, and on numerous mailing list postings, I've noticed confusion due to Nothing being inferred as the least upper bound of two other types. The answer may be obvious to you*, but I'm lazy, so I'm asking you*: Under what conditions is inferring Nothing in this way the most desirable outcome? Would it make sense to hav...
Custom Structure that can be assigned Nothing and/or DBNull??
Hi Guys, Please can any one advise me if it is possible to decalre a custom structure that can be assigned Nothing and / or DbNull.Values, and also can be instanciated as Nothing? What I am looking to do is ceate a custom DateTime object that can recieve a DBNull.Value from a database query and also start life as Nothing. IS this possi...
What kind of OOP structures work well in an application that has many different modes?
What can I do to structure my application so the code stays manageable as it gets bigger? I am building an application that will be in a certain state which will change depending on how the user interacts with it, and there will be many different states the application can be in. I've tried looking for tutorials/resources, but what I fin...
How do I make an integer to null in Excel VBA?
I am trying to detect whether an integer was set, and if not, skip most of the code in the loop (using an if statement). Here is what I have so for. Do While hws.Cells(r, 9).Value <> "" On Error Resume Next ar = Null ar = aws.Range("A:A").Find(hws.Cells(r, 2).Value).Row If Not IsNull(ar) Then 'work with ar' End If ...