I use setAttribute to store some info on an element, so later I can restore the value to its innerHTML. My question is what exactly element.getAttribute("attr") return value will be when the attribute does not set (exist)? It seems that it retur
I used joins and select query for passing dynamic values for the particular entity, Some fields are null in db. So i check the condition !=null condition but the whole select statement is throwing error if i use that field. My code as follows, @place
public class Class1 { List<Class3> allData = new ArrayList<Class3>(); public void setAllData(List<Class3> allData) { this.allData = allData; } public List<Class3> getAllData() { return allData; } } I have a class which name is Clas
I have all my code working correctly, this program is supposed to read in a file then print it out and calculate the BMI, prem costs and display it. I am only have issues with trying to display the total price of all prems.Seeing the output, I know t
View: Registration.cshtml @model MyNameSpace.Models.NewPatientRegistrationViewModel <div> ... All the HTML </div> Model: AccountViewModels.cs namespace MyNameSpace.Models { public class RegistrationViewModel { [Display(Name = "Date of Bir
While I compare two NSNumbers using isEqualToNumber, it is returning a false if both numbers are nil. Why a comparison of sort [nil isEqual:nil] always returns false while nil == nil returns true ?It is the standard behaviour. You will get the same r
I can't seem to figure out how to use the opposite of isnull or ifnull statements in sql. I need to say if a.Error1 is not null -- then print the ' - ' and the + CHAR(13)+CHAR(10). Basically There should be no dash or no new line break if the a.Error
i have got a column (nullable but it is Datetime)in sql server .. if user is not selected any date i need to pass the null value for this field for that purpose I have done like this below protected void btnSubmit_Click(object sender, EventArgs e) {
Things have been working fine, but I've just updated the gems via bundle update and now my /register page is showing an error: NoMethodError in Users#new_signup undefined method `new' for nil:NilClass The error is on the form_for line in the view. Th
I may be missing something, or I may be asking CC for something I shouldn't be, but - Is there a way to specify that a parameter "may or may not be null" without coming off as entirely redundant? For instance, imagine this contrived example: str
So, my program works fine. I only have three warnings left (one for each popupwindow) and it annoys me alot, I've been serching around for a solution that would fit my needs but I can't seem to find one. This is my code (the other two popupwindows ar
so I have a POJO object that I am creating and saving to a MongoDB collection using Jongo: import java.util.Map; public class MyObject { private String name; private Map<String, String> mappings; public MyObject() { } public MyObject(String name, Ma
If I declare a class attribute like this: private static String month; I don't know if later in the code is right to check like this: if(month == null){ month = "January"; } My main question is, is null a non-declared variable? What is the best
Im fairly new to Java and I am getting an "java.lang.NullPointerException" Both textfields are coming back as null and Im not sure why as I used .setText() and it shows up in the textfield Essentially what I am trying to do is pass the value in
I'm using Postgres with this query select * from Entity this_ where (this_.ID not in (null)) Why does this give me no results? I would expect to get all rows where id is not null with (this_.ID not in (1)) i get the expected resultsThe result of [not
I am extracting records from a database and some of the fields do not have values (null). I would like to extract them as string values, how can I do this? I have tried the following but get an invalid cast exception. string tc = (string)dbread["Cust
How to allow null in Context.Request: context.Response.Write(retrieveList(context.Request["SalCode"].ToString(null), context.Request["groupKeyword"].ToString(), context.Request["text"].ToString())); Firstly, Request["...
for example when I wrote: Char[] test = new Char[3] {a,b,c}; test[2] = null; it says Cannot convert null to 'char' because it is a non-nullable value type if I need to empty that array of char, is there a solution?Use a nullable char: char?[] test =
I was reading the C++ FAQ - "8.6 - When should I use references, and when should I use pointers?" and in particular this statement: Use references when you can, and pointers when you have to. ... The exception to the above is where a function's
Possible Duplicate: Why Option[T]? Reference types provide the special value null meaning "absence of a value". Value types have no such value, which is why C# introduced optional value types (along with special syntax for them). Scala's Option[
Is there a .? operator in Ruby that checks if an object is nil before calling a method on it? For instance if I have to code: if person and person.neighbor and person.neighbor.house and person.neighbor.house.rooms person.neighbor.house.rooms.each do
Ola, Android/JAVA question, I need to test if a object is not NULL and if it's not NULL check a value, thus avoiding runtime error. As my vb.net background I'm used to; if (not BackgroundWorker1 = nothing) andalso (backgroundworker.status = running)
I need to allow saving null as integer value on mysql server, how can I do this?Assuming your question is about the "Incorrect integer value" error message... mysql> CREATE TABLE `foo` ( -> `foo_id` INT(10) NOT NULL AUTO_INCREMENT, -> `
Using a ssrs 2005 matrix client side. I want to list the multiple addresses of one person, hence one row, multiple columns. The Column field is =Fields!StreetName.Value. The data details field is =First(Fields!StreetPrefix.Value) & " " &
In my NSFetchedResultsController, I set a sortDescriptor that sorts based on the date property of my managed objects. The problem that I have encountered (along with several others according to Google) is that nil values are sorted at the earliest en
I came across a weird situation when trying to count the number of rows that DO NOT have varchar values specified by a select statement. Ok, that sounds confusing even to me, so let me give you an example: Let's say I have a field "MyField" in &
I don't know how to handle nils my sort function gets. When I have this checking in it, table.sort crashes after some calls. if a == nil then return false elseif b == nil then return true end With this error:invalid order function for sorting. But ac
Background: today, an issue arose while using SQL Server Reporting Services. It seems that SSRS drop-down parameters in the report viewer don't allow you to indicate a (null) option so that you can see a report where that parameter is null. Basically
I'm new to python and have hit a problem with an SQL query I'm trying to perform. I am creating an SQL SELECT statement that is populated with values from an array as follows: ret = conn.execute('SELECT * FROM TestTable WHERE a = ? b = ? c = ?', *val
I'm working on a table design that could involve many NULL values in about 10 fields maybe 75% of the time the fields would be unused. I just generated some fake data (a million records) and could not sense any impact on SQL Server 2005. Size differe
