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• How do i cast A to object to class B when A can typcast to B?

  - by acidzombie24

  Basically i want to do this. ee causes a bad cast exception. NOTE: o can be ANYTHING. It may not be B, it can be C, D, E, F etc. var b = (B)"sz"; var e = (A)b; object o = b; var ee = (A)o;

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• When i am replacing or inserting an object into nsmutable array, I am getting Exception.

  - by Madan Mohan

  Hi, While replacing or inserting into an nsmutable array, I am getting exception as Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '* -[NSCFArray replaceObjectAtIndex:withObject:]: mutating method sent to immutable object' [list replaceObjectAtIndex:indexRow withObject:editcontacts]; //or [list insertObject:editcontacts atIndex:indexRow]; please help me. Madan, Thank You.

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• Whats the quickest way to get rid of all the properties of a an object in javascript?

  - by Shaun

  I have an on object like so var obj = {}; function set() { obj.x1 = 20; obj.y1 = 35; obj.x2 = 60; obj.y2 = 55; ... } Whats the quickest way to delete/reset all of the properties of obj?

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• How can I retrieve the instance of an attribute's associated object?

  - by Brandon Linton

  I'm writing a PropertiesMustMatch validation attribute that can take a string property name as a parameter. I'd like it to find the corresponding property by name on that object and do a basic equality comparison. What's the best way to access this through reflection? Also, I checked out the Validation application block in the Enterprise Library and decided its PropertyComparisonValidator was way too intense for what we need.

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• One-liner javascript to collect values from object graph?

  - by Kevin Pauli

  Given the following object graph: { "children": [ { "child": { "pets": [ { "pet": { "name": "fido" } }, { "pet": { "name": "fluffy" } } ] } }, { "child": { "pets": [ { "pet": { "name": "spike" } } ] } } ] } What would be a nice one-liner (or two) to collect the names of my grandchildren's pets? The result should be ["fido", "fluffy", "spike"] I don't want to write custom methods for this... I'm looking for something like the way jQuery works in selecting dom nodes, where you can just give it a CSS-like path and it collects them up for you. I would expect the expression path to look something like "children child pets pet name"

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• How does the garbage collector determine whether an object is garbage?

  - by n0vic3c0d3r

  How does the garbage collector determine whether an object is garbage? Does it refer to the stack to check the references to the space allocated in the heap?

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• what is the equivalent of object in C# for objective C?

  - by Wayne Lo

  In c# I can declare object o; then I can assign o=(float)5.0; or o="a string." Is there an equivalent for Objective-C? I tried to use id but it does not take primitive type like float or integer. Thanks for helping.

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• Can schema be ignored in object names in VS 2010 Schema Compare?

  - by Daniel

  Is it possible to ignore the schema in object names when comparing databases using Visual Studio 2010 Schema Compare? For example, I'd like [dbo].[mysproc] and [mysproc] to be considered equivalent.

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• How to get the measures of an object from far away?

  - by Luis Armando

  I am working on an App that intends to give an accurate measure of any object (building, desk, chair, people, etc.) Using the camera (either phone's or laptop) but I'm unsure as to how to do this without using a lot of resources, would someone mind giving me some options? I'm looking for a lightweight one that can be quickly processed by the computer/phone to give back the measures.

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• How to convert string to XML object in JavaScript?

  - by Jack Roscoe

  Hi, I am aware of this question already existing, but it has given me no luck. I have an application which loads a physicial XML document via the following method: jQuery.ajax( { type: "GET", url: fileName, dataType: "xml", success: function(data) { etc... I parse the XML and convert it into a string which is saved into a variable so that it can easily be stored in a database. How can I now convert the data in this variable back into an XML object so that it can be parsed as such?

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• How do i get ServletContext object in a simple class file?

  - by Nitesh Panchal

  Hello, I am creating a simple web application. I need to get reference to ServletContext object in that class. How can i get it?

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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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• Is it possible to enable or disable xmlHTTP object from Browser?

  - by Vijay Prasath

  In Mac OS, Fire fox Version 3.6.3 is blocking XMLHttp Object in one machine but it didn't block in same set of OS and browser versions in other machine. Is there any way to enable or disable xmlhttp from browser?

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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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• 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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• .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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• 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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• Java, Hibernate annotations, How to add methods to POJO object?

  - by RussianBear

  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.

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• Do I have to call release on an objective-c retain class variable when setting it to a new object?

  - by Andrew Arrow

  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.

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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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• Interview Question: Why we can not create object of abstract class.

  - by MAS1

  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.

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• Why is the compiler not complaining about an additional ',' in Array or Object Initializers?

  - by Danvil

  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?

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• How do I get the height of a GWT object in pixels?

  - by Ztyx

  How do I get the height of a GWT object in pixels? I am trying to find a getHeight method or something similar..

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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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• 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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