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• When is it necessary to override Equals() in a .NET class?

  - by Alex Angas

  .NET contains its own equality comparison functionality, however I don't really understand how it works. If the desired Equals() and == behaviour is to verify that every field of an object is equal to every field of another object, is it necessary to override Equals() with a method that does this explicitly?

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• Serializing data from a RSS feed in ASP.NET

  - by DotnetDude

  I'd like the user to specify a RSS feed address and serialize the information from it. I am not interested in the XML format, but populate a strongly typed object from the XML. My question is, is there a standard that all RSS feeds support (Do all of them have date, title etc)? If so, is there a XSD that describes this. If not, how do I handle serializing a RSS feed to an object in ASP.NET?

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• Hibernate subclass with foreign key relationships

  - by shikarishambu

  I need some help defining the following object hierarchy/ database relationship in Hibernate From the object sense – Agent is inherited from Person and Agency is inherited from Organization. they are inherited from Party which can have multiple Addresses associated with it The database consists of Agent - ID - Name -PartyID (references Party.ID) Agency -ID -Name -PartyID (references Party.ID) Address -AddrID -PartyID (references Party.ID) -Street Party. -PartyID

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• Accessing a numeric property in a SimpleXMLElement

  - by Webnet

  I'm trying to access the number in the below element, but I'm having trouble getting the value out of it. echo $object->0; //returns Parse error: syntax error, unexpected T_LNUMBER, expecting T_STRING or T_VARIABLE or '{' or '$' SimpleXMLElement Object ( [0:public] => 15810 ) Any ideas on how I can get that value?

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• Determining whether jQuery doesn't find any element

  - by Bardock

  Hi, I'm using jQuery's selectors, especially id selector: $("#elementId")... How should I determine whether jQuery has found the element or not? Even If the element with the specified id doesn't exist the next statement give me: [object Object] alert($("#idThatDoesnotexist"));

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• What's -mutableSetValueForKey: returning, actually? Is that something special?

  - by dontWatchMyProfile

  From the docs: You usually access to-many relationships using mutableSetValueForKey:, which returns a proxy object that both mutates the relationship and sends appropriate key-value observing notifications for you. So this returns an "intelligent" NSMutableSet which automatically lets the context delete objects when they get deleted from the set, and reverse? Is that a proxy object?

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• how to put link as an additional column in display tag to redirect it to action class of struts2

  - by lakhaman

  i am displaying a object detail through display tag. now i want a link in page through which user can delete or edit that particular record so i want a link which has object id as value and pass it to action class. or any other way so that i can delete or edit perticular record thank in advance

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• What is the purpose of using a reference to a reference in C++?

  - by SilverSun

  In my adventures studying the boost libraries, I've come across function signatures that have parameters which are a reference to a reference to an object. Example: void function(int && i); What is the purpose/benefit of doing it this way rather than simply taking a reference to an object? I assume there is one if it's in boost.

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• What Are Collections Implemented As In VB6?

  - by Tom Tresansky

  So a collection in VB6 keeps track of a key for each object, and you can look up the object by its key. Does that mean collections are implemented as some sort of hashtable under the hood? I realize you can have multiple items with the same key in a collection, hence the SOME SORT. Anybody know what type data structure a VB6 collection is supposed to represent?

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• What classes do you use to make string templates?

  - by EugeneP

  What classes do you use to make string placeholders work? String template = "You have %1 tickets for %d", Brr object = new Brr(template, {new Integer(1), new Date()}); object.print();

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• internel server error 500

  - by PHPgenerator

  hello, I made a web application that I connect to it from a mobile device and I used Ajax Request Object but the status of the object returned data is 500 and after search I found that this means Internel Server Error 500 Is there any suggestions what may be the reason ?? thanks

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• implement acl on field in spring security

  - by Mike

  Hi! I would like implement spring acl for my object fields. does anyone has an idea what do i have to implment for it? for example, i have Purchase object. i would like admin_role to have read on all the fields, and secretary_role to have read only on username and address field

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• What does ObjectName(parameter) refer in the structure OBJECT_ATTRIBUTE?

  - by kiddo

  hi all, I found this structure called OBJECT_ATTRIBUTE in one of the nt dll functions..I was curious to know about that structure and I went through its documentation(msdn)...In the OBJECT_ATTRIBUTE structure there is a parameter called PUNICODE_STRING objectName...As per the msdn documentation..it says that the objectName "the name of the object for which a handle is to be opened" which is actually a name or some root directory,am confused with this.Can anybody explain this term "name of the object"(root directory).what it represents.

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• C# dispatcher problem

  - by Bert

  Hi, In the constructor of an object i need to create a WPF mediaElement object: m_videoMedia = new MediaElement(); but the class can also be instantiated from a other thread so i need to use Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() => { m_videoMedia = new MediaElement(); })); But how can I get the right dispatcher instance in that constructor :s

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• Use reflection to get the value of a property by name in a class instance

  - by TheMoot

  Lets say I have class Person { public Person(int age, string name) { Age = age; Name = name; } public int Age{get;set} public string Name{get;set} } and I would like to create a method that accepts a string that contains either "age" or "name" and returns an object with the value of that property. Like the following pseudo code: public object GetVal(string propName) { return <propName>.value; } How can I do this using reflection? I am coding using asp.net 3.5, c# 3.5

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• In the Enterprise Library, how does the abstract Validator.cs have a method definition?

  - by Soham

  Consider this piece of code: public abstract class Validator { protected Validator() { } protected abstract void ValidateCore(object instance, string value, IList<ValidationResult> results); public void Validate(object instance, string value, IList<ValidationResult> results) { if (null == instance) throw new ArgumentNullException("instance"); if (null == results) throw new ArgumentNullException("results"); ValidateCore(instance, value, results); } } Look at the Validate() overload, how can an abstract class have definitions like this?

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• Why do we make a copy of final instance variable in a method in Java?

  - by PRK

  For instance: private final Object o; public void doSomething(){ final Object local = this.o; //access methods of local; } This practice is followed in lots of java classes (such as ArrayBlockingQueue). What's the benefit of this?

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• send xml data from j2me app to remote server

  - by pi

  Hi, I have a J2ME application - which generates XML data (from an object) and needs to get it sent across to a remote server/machine. How do I get this xml or the object through to the remote server please? Thanks. Just in case it might help, the receiving application on the remote server is PHP powered. Thanks again.

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• One-to-One relation classes

  - by SeyZ

  I want to have a class named ProjectDirectory and a class named MetaDirectory. Each project has a MetaDirectory which contains some meta data. Is it the good way to write the classes like this: class ProjectDirectory(object): def __init__(self, directory=None): self.directory = directory self.meta_directory = MetaDirectory(self) def __repr__(self): return self.directory class MetaDirectory(object): def __init__(self, project_directory=None): self.project_directory = project_directory self.directory = "%s/.meta/" % project_directory ProjectDirectory has a reference to MetaDirectory and MetaDirectory has a reference to ProjectDirectory. Is there an other solution or this solution is good ?

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• How to select data in JSON based on other JSON data? Javascript

  - by user1699030

  Is it possible to select certain data in a JSON Object using other data in the same JSON Object. Similar to MySQL. For example: myObj = {"elements" : [ { "name" : "Hydrogen", "symbol" : "H" }, { "name" : "Silver", "symbol" : "Ag" }]}; I want to select "Hydrogen" where the symbol is "H". Instead of having to put in something like this: document.getElementByID("TEST").innerHTML = myObj.elements[0].name; Thank you in advance.

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• Changing the Order in a .NET Generic Dictionary

  - by pm_2

  I have a class that inherits from a generic dictionary as follows: Class myClass : System.Collections.Generic.Dictionary<int, Object> I have added a list of values to this in a particular order, but I now wish to change that order. Is there any way (without removing and re-adding) that I could effectively re-index the values; so change the object at index 1 to now be at index 10 for example? For example, this doesn't work: myClass[1].Index = 10;

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• Read All Files in Directory?

  - by cam

  How would I go about reading all files in a directory? In C# I would get a DirectoryInfo object, and get all files into a FileInfo[] object. Is there similar functionality in the STD namespace in C++?

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• JQuery - Extend and Access Superclass

  - by Steve

  Is there a way to access the super object when extending objects using $.extend? I would like to extend an object, override a method, but call the overridden superclass method in the subclass method.

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• Javascript syntax for abbreviating repeated access to same identifier

  - by yongjieli

  Hi all I wanted to ask if there is a formal way of describing the following code, whereby we can access the same object repeatedly without re-typing the object's identifier: myObj.render(1).render(2).print(); I didn't know how to describe it when trying to form a question; I wanted to know whether or not something like this is possible in javascript, I know that I can do it in VB: myObj.render(1) if(foo == 'bar') .render(2) .print(); Thanks!

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• Simple Des Algorithm (encryption+Decription)

  - by Alhariri

  hi i want code for S-Des (encription & Decription) please help me i dont need to use des object that was in c++ i need to build this object please i need full code thanks very much gehad alhariri

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