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• LINQ: transform an array [,] into array[]

  - by code4life

  I know this is kind of a dumb question, but does anyone have an elegant (or non-elegant) LINQ approach to transform a 2D array (object[,]) into a 1D array (object[]) comprised of the first dimension of the 2D array?

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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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• Grails views for subclasses

  - by Jeff Beck

  I have a domain object called page that only has a title, I then have subclasses what are StaticPage that also has a textblock and PicturePage that contains a url. I have a site object that has many pages, I am looking for a way in the view for the site to call the a different template for each subclass. I can easily iterate through the pages but I would like to call each subclasses own view.

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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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• 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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• Reduce Triangle in DirectX 9

  - by Himadri

  Hello everyone, I have a 3D object with about 2000 or 3000 triangles. I want to reduce the number of triangle without affecting shape of object. for eg, I have two triangles, (1,1.5,2) (1.5,1.5,2) (1.7,2,2) (1.5,1.5,2) (1.7,2,2) (2,1.5,2) In this case these two triangle is same as a single triangle - (1,1.5,2) (2,1.5,2) (1.7,2,2) I dont want the manual method, But if there is any direct function or such thing which will reduce my triangle list. Thank You.

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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 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 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 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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• Confused about distinct/aggregate queries with (N)Hibernate

  - by nw

  I'm not sure how to approach queries that don't map 1:1 to my persistent entities - in other words, distinct and aggregate queries. For example, I need to retrieve a distinct list of property values for populating a drop-down list. Should I write a class and a mapping for the "entities" that are returned by this query? Or should I just use the native DB provider and work with native data sets instead?

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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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• Silverlight deepearth sql server 2008

  - by Worshound

  Is it possible to use deepEarth with sql server 2008 spatial, or is there aney other open-source mapping solutions for Silverlight and sql server 2008. Tanks for any thought on this.

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• Where are global variables stored in memory?

  - by Jack

  Are they stored in the heap or there is separate area where they are stored? Similarly where are static variables stored in memory. They can't be stored in frames as they will get destroyed when the function returns. PS - Can someone suggest a good book that talks about memory mapping for C/C++.

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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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• Rails and a development domain

  - by Adam

  I'm trying to use http://ls1.bigseapreview.com as a domain for a Rails project. The problem is it doesn't seem to be correctly mapping any routing apart from the home page. I have added /about but you can see that you will just get a 404, but it works locally. What do I have to do to fix this?

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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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• 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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• 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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• NHibernate: How to-reconfigure mappings at runtime?

  - by George Mauer

  Let's get this out of the way first: I know that SessionFactory is immutable - I'm trying to change the Configuration at runtime and regenerate ISessionFactory. Specifically, I have a Customer mapped that will have some fields added to its dynamic-component node at runtime. I would like to do something like this var newSessionFactory = previousConfiguration .RemoveClassMapping(typeof(Customer)) .AddXmlString(newMappingForCustomer) .BuildSessionFactory(); However, I don't see any obvious way to remove a mapping, is there anything I can do short of regenerating the entire Configuration?

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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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