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Replace returned null values in LEFT OUTER JOIN

SELECT WO_BreakerRail.ID, indRailType.RailType, indRailType.RailCode, WO_BreakerRail.CreatedPieces, WO_BreakerRail.OutsideSource, WO_BreakerRail.Charged, WO_BreakerRail.Rejected, WO_BreakerRail.RejectedToCrop, WO_BreakerRail.Date FROM indRailType LEFT OUTER JOIN WO_BreakerRail ON indRailType.Rai...

How to pass null pointer to Win32 API in C# .Net?

I'm looking at the RegisterHotKey Function: http://msdn.microsoft.com/en-us/library/ms646309(VS.85).aspx BOOL RegisterHotKey( __in HWND hWnd, __in int id, __in UINT fsModifiers, __in UINT vk ); I've been using IntPtr to pass in the first argument,m which works fine in most cases. But now I need to deliberately pass a null...

webpart context.session is null

I've been using the session array to store a state variable for my webpart... so I have a property like this: public INode RootNode { get { return this.Context.Session["RootNode"] as INode; } set { this.Context.Session["RootNode"] = value as object; } } ...

Should classes that are passed references to IDisposable objects be IDisposable as well and set them to null when disposed?

I think the question says it all. Thanks. ...

Django DecimalField returns "None" instead of empty value

Is there a way to force django to display nothing instead of "None" for a Decimal Field that's been left blank? In my template, I show a list of all the values for a particular field. Each value is hyperlinked to a page that displays the results of a query filtered on that value. But because there are some entries with null value, m...

C++: Why don't I need to check if references are invalid/null?

Hi all, Reading http://www.cprogramming.com/tutorial/references.html, it says: In general, references should always be valid because you must always initialize a reference. This means that barring some bizarre circumstances (see below), you can be certain that using a reference is just like using a plain old non-referenc...

How to pass null as DateTime value?

In a database, there is a field that saves a closure date. This date can be NOT NULL only if the case has been closed. If the case is not closed, it has to be NULL. How can I pass null value to a DateTime object? Tried this but it doesn't work. DateTime closure= dateDatumIspisa.SelectedDate ?? null; DateTime closure= dateDatumIspisa.S...

Two different tables or just one with bool column?

We have two tables: OriginalDocument and ProcessedDocument. In the first one we put an original, not processed document. After it's validated and processed (converted to our xml format and parsed), it's put into ProcessedDocument table. Processed document can be valid or invalid. Which makes more sense: have two different tables for vali...

Soap WSDL with Null

I need to specify a parameter in a function which is nullable. This doesn't work: <message name="SaveRequest"> <part name="serialNumber" nillable="true" type="xsd:int"/> </message> ...

handle null values for string when implementing IXmlSerializable interface

I have the following class that implements IXmlSerializable. When implementing WriteXml(), I need to handle the case where the string members of this class may be null values. What is the best way of handling this? Currently, I am using the default constructor in which all the string properties are initialized to empty string values. ...

Is it true that the assigned final object field may still be null inside a constructor?

Is it true that the assigned final object field may still be null inside a constructor? class MyClass { private final Object obj = new Object(); public MyClass() { System.out.println(obj); // may print null? } } if yes, isn't this a bug? ...

Why static fields are not initialized in time?

Somebody tell me: class MyClass { private static MyClass myClass = new MyClass(); private static final Object obj = new Object(); public MyClass() { System.out.println(obj); // will print null once } } I wonder, isn't this a bug? Why static objects are not initialized before the constructor runs? --update I'd just copied...

check if(country == @"(null)" doesn't work

hi all, I got the problem that the if-statement doesn't work. After the first code line the variable contains the value "(null)", because the user who picked the contact from his iphone address book doesn't set the country key for this contact, so far so good. but if I check the variable, it won't be true, but the value is certainly "(...

Why doesn't list.get(0).equals(null) work?

The first index is set to null (empty), but it doesn't print the right output, why? //set the first index as null and the rest as "High" String a []= {null,"High","High","High","High","High"}; //add array to arraylist ArrayList<Object> choice = new ArrayList<Object>(Arrays.asList(a)); for(int i=0; i<choice.size(); i++){ if(i==0){ ...

How to set arrayList size as null?

String a []= {null,null,null,null,null}; //add array to arraylist ArrayList<Object> choice = new ArrayList<Object>(Arrays.asList(a)); System.out.println(choice.size()); Why the size of the arrayList choice is 5 when all the elements have been set to null ...

Output a NULL cell value in Excel

I have an IF statement. If a cell = n, then do something, else output NULL =IF(A1=5, "Success", NULL) // #NAME? =IF(A1=5, "Success", "NULL") // NULL (as in text, not actually NULL!) =IF(A1=5, "Success", "") // blank but not NULL =IF(A1=5, "Success", 0) // zero value but not NULL ...

How to check for undefined or null variable in javascript

We are frequently using the following code pattern in our javascript code if(typeof(some_variable) != 'undefined' && some_variable != null) { // do something with some_variable } and I'm wondering whether there is a less verbose way of checking that has the same effect. According to some forums and literature saying simply if(s...

NULL pointer comparison fails

Hello, I'm initializing in a class a pointer to be NULL. Afterwards I check if it is NULL in the same class. But it's not always 0x0. Sometimes it's 0x8 or 0xfeffffff or 0x3f800000 or 0x80 or other strange stuff. In most case the pointer is 0x0 but sometimes it gets altered somehow. I'm sure that I'm not changing it anywhere in my code...

How to avoid null pointer error

I trying to find whether the elements of 2 arrayLists are match or not. But this code give me error Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException since some of the elements are null. How can I solved this problem? String level []={"High","High","High","High","High","High"}; ArrayList<Object> n = new ArrayList<O...

Check if DataRow exists by column name in c#?

I want to do something like this: private User PopulateUsersList(DataRow row) { Users user = new Users(); user.Id = int.Parse(row["US_ID"].ToString()); if (row["US_OTHERFRIEND"] != null) { user.OtherFriend = row["US_OTHERFRIEND"].ToString(); } ...