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• In C#, what happens when you call an extension method on a null object?

  - by tpower

  Does the method get called with a null value or does it give a null reference exception? MyObject myObject = null; myObject.MyExtensionMethod(); // <-- is this a null reference exception? If this is the case I will never need to check my 'this' parameter for null?

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• Is passing a struct value to a method by-reference in C# an acceptable optimization?

  - by Arc

  Say I have a struct: struct MyStruct { public int X public int Y } And a method in some class that is iterated over many times elsewhere: public bool MyMethod( MyStruct myStruct ) { return ... } Is changing the MyMethod signature to the following an acceptable optimization? public bool MyMethod( ref MyStruct myStruct ) If so, how much of an advantage would it really be? If not, about how many fields would a struct need for a big enough advantage using ref this way?

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• what is the required code method of making a sticker app?

  - by zeropt7

  I am new to photo apps, recently I am interested in making a sticker app like those can be seen in the appstore, I know I would need to use uiimagepickercontroller, uiscrollview and uigesturerecognizer. However I wonder which code method should I use for the app to load multiple stickers? Should it be called programmatically? Is that I would need to use the if-statement, say if one sticker is loaded, the app will auto generate a new sticker on top of it?

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• C# Why does code compile fine when there is an ambiguous virtual method?

  - by Jimbo

  I have a class (Class B) that inherits another class (Class A) that contains virtual methods. Mistakenly, I omitted the override keyword when declaring a (supposed to be) overriding method in Class B. Class A public class ClassA{ public virtual void TestMethod(){ } } Class B public class ClassB : ClassA{ public void TestMethod(){ } } The code compiled without a problem. Can anyone explain why?

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• In a django model custom save() method, how should you identify a new object?

  - by MikeN

  I want to trigger a special action in the save() method of a Django model object when I'm saving a new record (not updating an existing record.) Is the check for (self.id != None) necessary and sufficient to guarantee the self record is new and not being updated? Any special cases this might overlook?

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• I am passing a Controller as a parameter, can't get to RedirectToAction method?

  - by Blankman

  My method looks like: public static RedirectToResult(Controller controller, ...) { } when I do: controller. I don't see RedirectToAction, how come?

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• Why is @somesynatax used on a line before people define a method for thier Model in App Engine?

  - by indiehacker

  Why are these used prior to defining a method for a model? @classmethod @staticmethod What is the difference between them? Are there others I should be aware of? Must I use them?

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• Eclipse - How to show warning for unused method parameter ?

  - by Brad

  I am using Eclipse v3.5. In previous Eclipse versions i remember if i have defined a method with a parameter and didn't use it internally a warning appears, like this : public void myMethod( int x ) { // Didn't use x here so a warning appears at the x parameter. } But in v3.5 i do not see this warning. How can i enable it in Eclipse ?

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• What value is hashCode() method is returning in java?

  - by Jothi

  What value is hashCode() method is returning in java?. i read that it is an memory reference of an object. when i print hascode value for new Integer(1), its 1. for String(a) - 97. so i confused. is it ascii or what type of value is?

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• in java is the name of a method a string?

  - by David

  in java is the name of a method a string? why or why not? so if i have something like: public static int METHODNAME (some parameters or not) { something to do ; } is METHODNAME a string?

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• Any function / method in Java to implement a "freeze panes"-like sheet?

  - by MikeG

  We are using Java and Javascript to try to display a huge sheet with freeze panes, but it is being very difficult. Does someone know about a library, method, script or something, either free or commercial, to do this? Thanks.

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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 it necessary to check all the field in equals method of model class as i am using JPA ?

  - by Urvish

  Is it necessary to check all the field in equals method of model class as i am using JPA ? please reply....

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• How to get string name of a method in java?

  - by drozzy

  How can I find out through reflection what is the string name of the method? For example given: class Car{ public void getFoo(){ } } I want to get the string "getFoo", something like the following: Car.getFoo.toString() == "getFoo" // TRUE

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• I have a ruby view that has this namespace: ActionView::Base.new but i want to add a new method to b

  - by Totty

  I have a ruby view that has this namespace: ActionView::Base.new but i want to add a new method to be available to this ActionView::Base class.

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• What Could be the example scenarios to declare any class or any method as "final"?

  - by Parth

  What Could be the example scenarios to declare any class or any method as "final"? When do we need to do this? Please give me some example to understand the practical use of "final"... please guide me as I am a beginner in OOP

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• What's the different between an async delegate and async method?

  - by DayOne

  What's the different between an async delegate and async method? Someone told me they were different in C#, but I thought they were the same thing.

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• c# Can I use reflection to inspect the code in a method?

  - by koraytaylan

  i'm playing around with c# reflection api. i can easily load type info of classes, methods etc. in an assembly. now i wonder how can i load and read the code inside a method?

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• Is there a timeout for threads waiting on a synchronised method in Java?

  - by MalcomTucker

  Is there a default timeout for threads waiting on a synchronised method in Java? Some threads in my app are not completing as expected. Is there anyway to check whether threads have died as a result of timeouts?

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• Can anybody tell me exactly what the Object doesn't support this property or method means in IE for

  - by helle

  Hey guys, while surfing through the web and through stackoverflow.com i found many posts in forums, etc. where this message occures in IE but not in the other browsers. the thing is, the resolutions vary widely and it's not clear for me what's the best way to avoid this problem. So my question is, if anybody knows exactly, specificly what this message Object doesn't support this property or method means, causes, says ,... thanks for help. helle

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• How to pull a method out of it's class (and into a new or exsisting)?

  - by Nasit

  What is the easiest way of pulling an excisting method out of it's class and into a new class using Visual studio 2010 / Resharper? Edit: I use Resharper version 5.

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• C# What is the sense of Application.Exit Method ?

  - by PaN1C_Showt1Me

  I'm asking this question, because I can't figure out when I could find an use of this method. If I've designed everything correctly then I should be able by the medium of normal returns and try catch clauses to handle all problems and end the application in a correct manner. Am I wrong ?

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• in Javascript, should I be using the for-loop construct or the forEach method for iteration?

  - by Dutch

  Is one way more efficient? Are there any limitations in one method versus the other? Thanks for any input you guys can give me ;-)

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• Is there a method to convert PyUnicodeObject variable to PyObject type?

  - by karnol

  A value which is a PyUnicodeObject need to be passed to PyObject variable. Is there any conversion method for that? thanks karnol

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• Can PHP array passed POST method to catch in ASP.NET MVC?

  - by RendeRR

  Can PHP array passed POST method to catch in ASP.NET MVC? Query string: WebAccess/ArrayTest?val[]=1&val[]=2&val[]=3 I write: ActionResult ArrayTest (String[] val) But this only works if the query string to remove the "[]"

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