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• Why does the first segment of code not crash?

  - by megha

  class TestNull { private: int m_iX; public: TestNull():m_iX(0){} void show() { printf("Hello New World "); } }; int _tmain(int argc, _TCHAR* argv[]) { TestNull *pTest = NULL; pTest-show(); int x; scanf("%d",&x); return 0; }

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• Changing website favicon dynamically

  - by rwmnau

  I have a web application that's branded according to the user that's currently logged in. I'd like to change the favicon of the page to be the logo of the private label, but I'm unable to find any code or any examples of how to do this. Has anybody successfully done this before? I'm picturing having a dozen icons in a folder, and the reference to which favicon.ico file to use is just generated dynamically along with the HTML page. Thoughts?

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• How do I make defensive copy of an object?

  - by kunjaan

  How do I make defensive copies of a Mutable Object which contains a mutable field in an Immutable Object? class ImmutableObject { private final MutableObject immutable_field; ImmutableObject(MutableObject y) { this.immutable_field = y; } MutableObject return_immutable_field() { return immutable_field; } } class MutableObject { public int mutable_field; } The MutableObject does not have a constructor that lets me set the field. The MutableObject's current state should be captured in the Immutable Object and never changed.

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• how to make so that Form2 when you click on Button1 not opened for the second time?

  - by Saska

  I have the code: private void Button1_Click (object sender, EventArgs e) ( Form2 f2 = new Form2 (); f2.Show (); ) how to make so that Form2 when you click on Button1 not opened for the second time, if it is open? sorry for bad english

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• Access check on folder in java

  - by Bhaskar

  I'm using the following code to check the access on selected folder. but it's not working. private boolean writeAccess(String path){ try { AccessController.checkPermission(new FilePermission(path, "read,write"));/*,*/ // Has permission return true; } catch (SecurityException e) { // Does not have permission return false; } } wt is prblm in it. and is there any other options to check the existance and access on the folders/directories?

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• Website programming language [closed]

  - by Develman

  Hello everybody, I have worked a lot with PHP in last times, but I am not sure if it is the best choice for website programming. What language do you prefer for website programming? Which type (private, business, etc.) of website do you build with that language?

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• Is there a better way to write the find_messages_by_slug_or_404 method?

  - by J. Pablo Fernández

  In my messages_controller I have the following private method: def find_message_or_404(slug) message = user.messages.find_by_slug(slug) if message.nil? raise Error404 end message end I find it not elegant and not very Rubist. Is there a way to improve it?

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• Is there a posibility to break on every object reference in eclipse debugger ?

  - by lbownik

  Suppose I have a class public classs MyClass { private Set<String> set = new HashSet<String>(); //and many methods here } is there a possibility to make an eclipse debugger stop at every line where set member is used ?

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• Downsides to immutable objects in Java?

  - by parkr

  The advantages of immutable objects in Java seem clear: consistent state automatic thread safety simplicity You can favour immutability by using private final fields and constructor injection. But, what are the downsides to favouring immutable objects in Java? i.e. incompatibility with ORM or web presentation tools? Inflexible design? Implementation complexities? Is it possible to design a large-scale system (deep object graph) that predominately uses immutable objects?

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• Quick question regarding Conditional Compilation (ifndef)

  - by sil3nt

  Hello, This is quite probably a very silly question but I need to be sure. I've been given a class declaration in a header file eg. #ifndef file_H #define file_H class ex{ private: public: }; #endif and I've been required to write the method definitions in the same file, which I have done, my question is does the "#endif" stay where it is just after the class declaration or does it go at the end of my file after the class method definitions?.

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• Resharper intellisense confusion

  - by Mystere Man

  Today I had something weird happen in my copy of Resharper 5. I have a class that looks like this: public class Foo { public string Username { get; private set; } public Foo (string userName) { Username = userName; } public void Bar() { DoWork(Username); } public DoWork(string userName) { } } When I start to type DoWork(us I get the following from intellisense: Notice that it's pulling up the constructor argument, and it ends with a colon: userName: What's going on here?

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• passing Func<TSource, TKey> keySelector error

  - by user338429

  static void Main() { string[] a = { "a", "asd", "bdfsd", "we" }; a = a.OrderBy(fun).ToArray(); } private static int fun(string s) { return s.Length; } its is giving compile time error . I know that we can do this with Lambda expression like this. a.OrderBy(s=>s.Length).ToArray(); but i want to this do by defining different function . What mistake i have done?

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• What solution would you suggest for implementing both chat and IM on the site?

  - by AlexPolo

  Should I pick up IRC or go another route? What I need are public chat and private instant messaging on my social network. (I plan to rent VPS for the matter.)

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• How do I persist a Java property of type Object using Hibernate?

  - by afielden

  I have a Java class with a property like this private Object myObj; When I try to save the class using Hibernate annotations, I get the rather confusing error message "property mapping has wrong number of columns". What is the correct approach to persisting a class containing a generic property such as this?

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• What's wrong with this print-iterable method?

  - by Tom Brito

  private static void printIterable(Iterable iterable) { // ERROR: "Type mismatch: cannot convert from element type Object to Iterable" for (Iterable i : iterable) { System.out.println(i); } } What the compiler is talking about? Its an Iterable, not an Object.

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• What Design Pattern is this?

  - by 01

  I know that everything we do in programming can be described as design pattern(even abstract method has design pattern called template method) public class Guicer extends AbstractModule { private static Injector injector = Guice.createInjector(new Guicer()); public static void setInjector(Injector injector) { Guicer.injector = injector; } public static T getInstance(Class c) { return injector.getInstance(c); } @Override protected void configure() { } } What design patterns are used in this code?

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• Creating an instance within the Class itself

  - by didxga

  What's going on when the assignment statement executed at Line 4, does compiler ignore the new operator and keep the foo variable being null or something else happen to handle this awkward moment? public class Foo { // creating an instance before its constructor has been invoked, suppose the "initializing" // gets printed in constructor as a result of the next line, of course it will not print it private Foo foo = new Foo();//Line 4 public Foo() { System.out.println("initializing"); } }

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• Modify loopj jQuery Plugin: Tokenizing Autocomplete Text Entry

  - by dev.e.loper

  I'm looking into updating LoopJ's autocomplete plug-in. I want to override one of the methods (highlight_term to be exact) however it looks like that method is private.

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• Speeding up Math calculations in Java

  - by Simon

  I have a neural network written in Java which uses a sigmoid transfer function defined as follows: private static double sigmoid(double x) { return 1 / (1 + Math.exp(-x)); } and this is called many times during training and computation using the network. Is there any way of speeding this up? It's not that it's slow, it's just that it is used a lot, so a small optimisation here would be a big overall gain.

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• IIS headers of aspx page appear on page sometimes, any idea why?

  - by Chris

  At random this output it occurring at the top of the page. Site is installed on a lot of servers issue only happens on one server. HTTP/1.1 200 OK Date: Mon, 24 May 2010 04:18:30 GMT Server: Microsoft-IIS/6.0 X-Powered-By: ASP.NET X-AspNet-Version: 2.0.50727 Cache-Control: private Content-Type: text/html; charset=utf-8 Content-Length: 39611

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• php won't detect all spaces in a string...

  - by user296516

  Hi guys, I've got a string that comes from a POST form where I want to replace all spaced with some other character. Here's that I did: $cdata = str_replace(" ","#",$cdata); And I got this. --- Contact-ID#=#148 [10274da8]#Sinhronizacija#=#private [1000137d]#Uzvards#=#Zom [1000137c]#Vards#=#Tana [1000130e]#Talrunis#=#3333 [1000130e]#Mobilais#=#5555 As you can see, spaced before "[10..." are still there. Any ideas what could be the problem?

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• How do I link up a button click event between a class and a module automatically?

  - by CowKingDeluxe

  I have this code (which doesn't work): Public Class Form1 End Class Public Module test1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Form1.Button1.Click MsgBox("HI") End Sub End Module I know I could handle the button click event in Form1, and then call a function in test1, but I would like to handle the button click event directly in the test1 module. Is there a way to automatically send UI events from the Form1 class to another module?

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• Inspecting values using the debugger in C#

  - by JC

  How do I inspect the return value of this GetItems() function using the debugger? Do I have to create a local variable for the results to accomplish this? foreach (string item in GetItems()) { // some code } private List<string> GetItems() { // return some list }

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• How can a property resolve its own name and type with reflection?

  - by Tim Santeford

  Is there a way for a property to access its own name and type at runtime using reflection? I want to access this info without hard coding the name or index of the property in the class. Simple Example Code: Private ReadOnly Property MyProperyName() As String Get Console.WriteLine((Get Current Property Info).Type.ToString) Console.WriteLine((Get Current Property Info).Name) Return "" End Get End Property Expected output: System.String MyPropertyName

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• Translate from C# to VB

  - by Congero

  How do you convert the following c# code to vb.net? private static readonly ICollection<string> _skipHeaders = new[] { "Connection", "Keep-Alive", "Accept", "Host", "User-Agent", "Content-Length", "Content-Type", "Accept-Encoding", "Authorization", "Referer", ProxyMethodHeader, ProxyAuthorizationHeader, ProxyAcceptHeader, ProxyAgentHeader, ProxyQueryHeader };

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