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• How to test if a thread is holding a lock on an object in C#?

  - by theburningmonk

  Hi, Is there a way to test if the current thread is holding a monitor lock on an object? I.e. an equivalent to the Thread.holdsLock in Java. Thanks,

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• Why is NULL/0 an illegal memory location for an object?

  - by aioobe

  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?

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• document.form[0] is Null or Not an Object error when hiding a text field in ASP.Net

  - by grady

  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 :-)

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• It is good programming practice to always check for null pointers before using an object in C++?

  - by jm1234567890

  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?

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• Can two managed object context share one single persistent store coordinator?

  - by mystify

  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?

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• What is the easiest to transfer an object between two C# apps over the web?

  - by edude05

  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

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• What is a good way to ensure the background of a flash object matches the page?

  - by George Edison

  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?

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• How can I move an object left and right with silverlight?

  - by Craig

  I currently have two buttons that say left and right, and I want them to move a square object left and right respectively. What its currently doing when i press left is moving the square to the left, and if I press left again, it resets from the center and goes left. I want it so that when I press left, from where ever it is currently to go left and right. I know the principle is something like get current objects position and add the canvas coordinates respectively but how do I do this?

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• Is it possible to call an object method this way in C++?

  - by Goose Bumper

  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);

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• what else text editors can be used to editor object c code except xcode.

  - by Tony

  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?

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• How do I unit test the methods in a method object?

  - by Sancho

  I've performed the "Replace Method with Method Object" refactoring described by Beck. Now, I have a class with a "run()" method and a bunch of member functions that decompose the computation into smaller units. How do I test those member functions? My first idea is that my unit tests be basically copies of the "run()" method (with different initializations), but with assertions between each call to the member functions to check the state of the computation. (I'm using Python and the unittest module.)

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• How can I save the content of an XDocument object as it is without parsing the hexadecimal reference

  - by SubPortal

  Is there a way to have an XDocument object save its content and keeps the hexadecimal references as they are without parsing them? Thank you for any help.

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• Is there a Pattern in Scala that add a method to an Array object?

  - by Fred Haslam

  Is there a Pattern in Scala that can add a method to an Array object? I am thinking of the implicit conversion of Int to RichInt. But that can't be done as Array is a final class.

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• Quickest way to dump Python dictionary (dict) object to a MySQL table?

  - by NJTechGuy

  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!

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• .NET immutable object usage best practices? Should I be using them as much as possible?

  - by Daniel

  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?

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• Can I refer to an object in its constructor?

  - by Roman

  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).

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• How to train software so it recognize the kind of object shown in a picture ?

  - by carl

  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.

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• In which situations does a managed object context have changes?

  - by dontWatchMyProfile

  In which situations does a managed object context have changes? What can happen that -hasChanges returns YES?

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• Can I cache a ManyToOne hibernate object without it being lazy loaded?

  - by Andrew

  @ManyToOne @JoinColumn(name = "play_template_id", table = "team_play_mapping" ) public Play getPlay() { return play; } public void setPlay( Play play ) { this.play = play; } By default, this is eager loading. Can I get it so that it will read the play object from a cache without making it lazy loading? Am I correct that eager loading will force it to do a join query and hence no caching?

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• The type of the argument object [type] is not primitive.

  - by Abstract

  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?

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• I used shared object to drawing line. But some times syncevt.changeList[cl].name is "clear" insted o

  - by sachin

  I used shared object to drawing line. But some times syncevt.changeList[cl].name is "clear" insted of "success". and value of setproperty become undefined. Have any solution for this porblem

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• C++: Saving the class object in archived format which is having char * attributes and read it back f

  - by Manjunath

  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.

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• In Javascript, if there is an object with a lot of properties that can functions, how do you convert

  - by Jian Lin

  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.

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• Method parameter that can take an object or a nil?

  - by Dan Ray

  How do I spell a method whose argument can either be an object of a certain type, or nil? You see those all the time in framework classes, but I've just encountered my first instance where it would be useful to create one.

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• How to convert a JSON string to an object?

  - by BrunoLM

  How can I convert a JSON string to an object in JavaScript? Is there a method that does this? Something like: var x = "{ id: 5, name: 'hello' }"; var y = /*something*/(x); alert(y.id + " " + y.name);

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