I am using hibernate annotations. How to add methods to POJO object? For example i have "getChildNodes" method, associated with database, but i want also add recursive method "getAllChildNodes". I get "org.hibernate.PropertyNotFoundException: Could not find a setter for property progress in class" exception when i do it.
Say I have a simple object such as
class Something
{
public int SomeInt { get; set; }
}
I have read that using immutable objects are faster and a better means of using business objects? If this is so, should i strive to make all my objects as such:
class ImmutableSomething
{
public int SomeInt { get { return m_someInt; } }
private int m_someInt = 0;
public void ChangeSomeInt(int newValue)
{
m_someInt = newvalue;
}
}
What do you reckon?
In Javascript, if an object has lots of properties that are functions:
var obj = { foo: function() { ... },
bar: function() { ... },
...
}
then how can you get an array of names of those functions? That is, an array
["foo", "bar", ... ]
thanks.
I am new to mac, my question is what else text editors can be used to edit object c code except xcode. And which one is the best for productively editing source code?
I understand the purpose of the NULL constant in C/C++, and I understand that it needs to be represented some way internally.
My question is: Is there some fundamental reason why the 0-address would be an invalid memory-location for an object in C/C++? Or are we in theory "wasting" one byte of memory due to this reservation?
Using simple type like
class A {
public int X, Y;
}
with object intializers, one can write
var a = new A { X=0, Y=0 };
But the following is also accepted by the compiler:
var a = new A { X=0, Y=0, }; // notice the additional ','
Same for int[] v = new int[] { 1, 2, };
This looks a bit strange ... Did they forgot to reject the additional ',' in the compiler or is there a deeper meaning behind this?
Say I have:
@property (nonatomic,retain) NSString *foo;
in some class.
And I call:
myclass.foo = [NSString stringWithString:@"string1"];
myclass.foo = [NSString stringWithString:@"string2"];
Should I have called [myclass.foo release] before setting it to "string2" to avoid a memory leak?
Or the fact that nothing is pointing to the first "string1" object anymore is good enough?
And in the dealloc method [foo release] will be called.
Hey,
I am hiding a TextBoxin my aspx page like this:
myField.visible=false;
Now I have a DropDown as well which tries to access the TextBox on IndexChange. The problem is, it cant access the hiffen TextBox and I am getting document.form[0] is Null or Not an Object. How can I solve that? Is the some check for that in JavaScript?
Thanks :-)
In interview someone ask me @ Abstract class. I told him @ abstract class and i also told that we can not create object of this class. his next question is why? because it may or may not include abstract methods.
I have a dict object. I dumped the data using this:
for alldata in data: # print all data to screen
print data[alldata]
Each field had brackets [] and 'None' values for NULLS and date.datetime for date values.
How do I dump this dict to MySQL table? Thank you!
I would like to use a component that exposes the datasource property, but instead of supplying the datasource with whole list of objects, I would like to use only simple object. Is there any way to do this ?
The mentioned component is DevExpress.XtraDataLayout.DataLayoutControl - this is fairly irrelevant to the question though.
Since there is no way that you can make the flash object transparent, there needs to be some other means by which you can match the background. I thought of maybe creating a ActionScript/Javascript bridge, but I wonder if this is the route to take.
Do I have a better option?
Example: I have one persistent store coordinator which uses one single persistent store.
Now there are two managed object contexts, and both want to use the same persistent store. Could both simply use the same persistent store coordinator, or would I have to create two instances of NSPersistentStoreCoordinator? And if I had to, then: Would I also have to create two NSPersistentStore instances?
I have written an application that basically gathers up a bunch of text and numerical data from the client PC and stores it as an object. Right now I'm implementing XML serialization so that the file can be saved.
The issue is now, how do I get this data to the server? I have a server running IIS 7 setup but I don't quite understand the ASP.net life cycle, so I'm not sure how to implement the receiving app.
What should I do?
Thanks
I was looking through the "Domain Oriented N-Layered .NET 4.0 Sample App" project and ran across some code that I do not understand. In this project they often use syntax like the following to check arguments for null:
public GenericRepository(IQueryableContext context,ITraceManager traceManager)
{
if (context == (IQueryableContext)null)
throw new ArgumentNullException("context", Resources.Messages.exception_ContainerCannotBeNull);
Why would you cast null to the type of the object you are checking for null?
Can I do the following?
public Manager(String userName) {
game = new Game(userName);
game.addManager(this);
}
The problem is that I refer to an object (this) in its constructor (before it was actually created).
This seems like a lot of work; to check for null each time an object is used.
I have been advised that it is a good idea to check for null pointers so you don't have to spend time looking for where segmentation faults occur.
Just wondering what the community here thinks?
Here's my class definition:
class A {
public:
void do_lengthy_work() {
cout << "working." << endl;
}
};
I have an object of type A, and I want to call do_lengthy_work() on it:
A a;
a.do_lengthy_work();
Is it also possible to call the same method using some variant of the following?
A::do_lengthy_work(a);
Hi all,
Assume I have a class
class A
{
char *attr1,*attr2;
public:
. . .
};
How to save the object of this class to file in a binary format and read it back?
Thanks.
I want to detect one kind of object such as person in the picture,
who can tell me how to training a kind of people classifier for use,so we can use the classifier to detect people in any picture.
I'm trying to create a simple Guestbook web service using ASP.NET WebServices.
When trying to serialize a list of objects, I get the following exception:
System.InvalidOperationException: The type of the argument object 'GuestBookService.GuestBookEntry' is not primitive.
How can I fix this error?