Calling Java varargs method with single null argument?
If I have a vararg Java method foo(Object ...arg) and I call foo(null, null), I have both arg[0] and arg[1] as nulls. But if I call foo(null), arg itself is null. Why is this happening? ...
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Assigning null to ArrayList items in Java
Hi, I have the following code: static ArrayList<PreparedStatement> alPrepStmts = new ArrayList<PreparedStatement>(); static PreparedStatement m_stmtOne; static PreparedStatement m_stmtTwo; static PreparedStatement m_stmtThree; ... static PreparedStatement m_stmtOneHundred; private static void init() { alPrepStmts.add(m_stmtOne); ...
SQL query problem when upgrading from SQL Server 2000 to SQL Server 2008 R2
Dear all, I am currently upgrading a database server from SQL Server 2000 to SQL Server 2008 R2. One of my queries used to take under a second to run and now takes in excess of 3 minutes (running on faster a faster machine). I think I have located where it is going wrong but not why it is going wrong. Could somebody explain what the ...
Page cannot be null
I am using a ScriptManager in my aspx page and when I run on the submit button within the page I am receiving a "Page cannot be null" error message. I have looked around but cannot find anything that deals with this. I am writing in C# using VS2008 with the latest .NET framework, and the ScriptManager is for two Infragistics controls f...
How to resolve ambiguity when argument is null?
Compiling the following code will return The call is ambiguous between the following methods or properties error. How to resolve it since I can't explicitly convert null to any of those classes? static void Main(string[] args) { Func(null); } void Func(Class1 a) { } void Func(Class2 b) { } ...
NULL in query values resulting in 0.00 in MySQL
I have a query that's written dynamically (OO PHP via Joomla) to insert some values into a MySQL database. The form that a user fills out has a field on it for dollar amount, and if they leave that blank I want the value going into the system to be NULL. I've written out the query to the error log as it's running; this is what the query ...
Handling a null exception C#
Ok, new coder here looking for a little insight into this problem. So I have a for loop like that starts like this: for (int i = 0; i < rowHandles.Length; i++) { .........code.... } rowHandles is an int array that contains rows of data. This for loop has code that deletes the rows of data when a delete button is clicked, to be s...
How to use isset and null variables in functions
I have a fairly simple question I'm guessing. I have the following code at the beginning of my function, but it must not be correct because it causes the blank to turn blank. If I comment out the IF statement, everything runs fine. What am I doing wrong? Sorry, it's probably very basic... function get_entries($order = 'newest', $slug ...
Representration of a Empty Class Array
Hi Guys, I am actually looking at getting the method, whose name is stored in the string "methodName", from the Class "CC1" using Java Reflection. Method actualMethod= CC1.getMethod(methodName, parameterTypes); This is the syntax. The problem is the method takes no parameter. How do I represent that in the parameterTypes ? where p...
Can't check if int is null
I'm trying to use a dictionary. Whenever I want to check if an element is present in the dictionary, I do this: int value = results.get("aKeyThatMayOrMayNotBePresent"); if (value != null) // ... But then the compiler says I can't compare an int to a <nulltype>. What's the correct way to check for null in this case? ...
Java null pointer exceptions - don't understand why...
Run time error on main method in MovieList.java. I'm not sure my program design is fundamentally very good, but I'd like to know why it crashes. Thanks in advance. package javaPractical.week3; import javax.swing.*; public class Movie { //private attributes private String title; private String movieURL; private String ...
Safe dereferencing in Python
Groovy has a nice operator for safe dereferencing, which helps to avoid NullPointerExceptions: variable?.method() The method will only be called, if variable is not null. Is there a way to do the same in Python? Or do I have to write if variable: variable.method()? ...