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• How can an object not be compared to null?

  - by ProfK

  I have an 'optional' parameter on a method that is a KeyValuePair. I wanted an overload that passes null to the core method for this parameter, but in the core method, when I want to check if the KeyValuePair is null, I get the following error: Operator '!=' cannot be applied to operands of type System.Collections.Generic.KeyValuePair<string,object>' and '<null>. How can I not be allowed to check if an object is null?

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• Are there any concerns I should have about storing a Python Lock object in a Beaker session?

  - by Jack

  There is a certain page on my website where I want to prevent the same user from visiting it twice in a row. To prevent this, I plan to create a Lock object (from Python's threading library). However, I would need to store that across sessions. Is there anything I should watch out for when trying to store a Lock object in a session (specifically a Beaker session)?

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• How to replace one object with another everywhere in the program?

  - by Entrase

  I don't really think there is some method to do this… Anyway… How can I replace one object with another everywhere in the program? It would be like all the references to an old object start to point to a new one.

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• Where is the VB.Net debugger "Make Object ID" function?

  - by Josh

  When using the visual studio 2008 debugger with c# i can right-click on a variable and choose "Make Object ID" which allows me to watch that object (via it's ID) regardless of whether it is in the current stack frame or not. When the debugger is in VB code, (doesnt matter if it's run from a c# unit test or a vb unit test) That option isn't there. Where did VB put this feature? Or does it simply not support it like so many other helpful c# features?

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• How to remove a single, specific object from a ConcurrentBag<>?

  - by routeNpingme

  With the new ConcurrentBag<T> in .NET 4, how do you remove a certain, specific object from it when only TryTake() and TryPeek() are available? I'm thinking of using TryTake() and then just adding the resulting object back into the list if I don't want to remove it, but I feel like I might be missing something. Is this the correct way?

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• How can I return a Future object with Spring without writing concurrency logic?

  - by Johan

  How can I return a java.util.concurrent.Future object with a Receipt object and only use the @javax.ejb.Asynchronous annotation? And do I need any extra configuration to let Spring handle ejb annotations? I don't want to write any concurrency logic myself. Here's my attempt that doesn't work: @Asynchronous public Future<Receipt> execute(Job job) { Receipt receipt = timeConsumingWork(job); return receipt; }

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• What is a reverse reference to the DOM object?

  - by chadley

  In this link: http://css-tricks.com/snippets/jquery/jquery-plugin-template/ it has a line of code that says // Add a reverse reference to the DOM object base.$el.data("yourPluginName", base); what does the "reverse reference to the DOM object" mean?

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• What is the purpose of subclassing the class "object" in Python?

  - by ignoramus

  All the Python built-ins are subclasses of object and I come across many user-defined classes which are too. Why? What is the purpose of the class object? It's just an empty class, right?

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• JQuery UI: is it possible to know where an object has been dropped?

  - by Jack Duluoz

  Hi, what I want to do is to know where (not in terms of position (x, y), but a reference to the DOM element) an object was dropped. I have a grid made up with divs where you can drop various items and I need to know which div on the grid was the item dropped on (getting its id would be fine). The callback function function(event, ui) { //code here } has just that ui object who doesn't apparently contain any information about this, but only about the draggable item or its helper.

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• Best way to manage JSON object via GET and POST in php.

  - by Kucebe

  My site does some short ajax call in JSON format, using jQuery. At client-side i'd like to send object just passing it in ajax function, without being forced to wrap it in an object literal like this: {'JSON_Obj' : myJSON_Obj }. For the same reasons, at server-side i'd like to manage objects without the binding of $_GET['JSON_Obj'] or $_POST['JSON_Obj']. For example, using file_get_contents("php://input"), i can manage POST requests in that way, but in GET format it doesn't work. Any suggestions?

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• How do I create a duplicate instance of object contained in a shared pointer in c++?

  - by user367848

  I have an object which has both a copy constructor and assignment operator defined. It is enclosed inside a shared pointer. I want to make another shared pointer that contains a copy of the original shared pointer (i.e. new shared pointer to a new memory location, which however, has the same data as the original object). Thanks for any assistance.

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• How can I declare an object with properties that I will be passing around inside of my function using Typescript?

  - by Marilou

  I've been using the following: var modal = { content: '', form: '', href: '' } But now I have started to use Typescript is there a better way I can declare an object and how can I declare the types of my properties. The reason I am using this object is that it's inside of a function and inside that function I have other functions that set and use the values of the properties. Is this the best way for me to do this or is there another way I could better do this with typescript?

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• How to assign a value of a property to a var ONLY if the object isn't null

  - by Blankman

  In my code, is there a shorthand that I can use to assign a variable the value of a object's property ONLY if the object isn't null? string username = SomeUserObject.Username; // fails if null I know I can do a check like if(SomeUserObject != null) but I think I saw a shorthand for this kind of test. I tried: string username = SomeUserObject ?? "" : SomeUserObject.Username; But that doesn't work.

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• What is simpliest C# function to parse Json String into object?

  - by Ole Jak

  What is simpliest C# function to parse Json String into object and display it (C# xaml WPF)? (for example object wit 2 arrays - arrA and arrB)

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• Binding the IsSelected property of ListBoxItem to a property on the object from it's source.

  - by BrandonS

  I have a WPF ListBox control and I'm setting it's "ItemsSource" to a collection of item objects. How can I bind the "IsSelected" property of the ListBoxItem to a "Selected" property of a corresponding item object without having an instance of the object to set as a binding.Source?

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• Way to generate a code that creates a constructor based on the current values of an object?

  - by burak ozdogan

  Hi, What I want to achieve is after loading my object from the database, to generate a code that will give me a block which initializes my object based on its current values so that I can use this code-block in my unit tests again and again without loading it from Db anymore. Is there any tool around to achieve such a goal for VS? thanks

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• Why can't I see a Managed Object Class file template in Xcode?

  - by openfrog

  I created a .xcdatamodel Managed Object Model file in Xcode. I selected that file in Groups & Files. Then I go to File New... and nowhere in the iPhone Templates / Cocoa Touch Class templates I see the "Managed Object Class" file template. Does anyone know what can be wrong?

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• Why is IE8 developer tool showing wrong line no for object expected error?

  - by Amitabh

  I am facing a strange javascript object expected error in IE8? On IE Developer tool the error shown as Object expected products.aspx?productid=127, line 234066871 character 5 There is only around 350 lines in the rendered html source. How to find the correct source of error.

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• Where is a good javascript reference for object event handlers?

  - by GregH

  I am relatively new to Javascript and constantly need to look up how to handle various events for objects. For example, I have a table containing a few text fields and need to know when somebody starts typing in any of the text boxes. Is there any good concise reference on the web anyplace that documents all of the objects and event handlers associated with all objects? I'd like to be able to look up the object and see all of the events I can handle for that object.

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• Is there a way to output the properties/values of a json object?

  - by Blankman

  Is there a way to output the properties/values of a json object? I make a jsonp call, and I want to see what the json object looks like. Also want to learn how to iterate through the property and values.

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• In Ruby, how to write a method to display any object's instance variable names and its values

  - by Jian Lin

  Given any object in Ruby (on Rails), how can I write a method so that it will display that object's instance variable names and its values, like this: @x: 1 @y: 2 @link_to_point: #<Point:0x10031b298 @y=20, @x=38> I also want to be able to print <br> to the end of each instance variable's value so as to print them out nicely on a webpage. the difficulty now seems to be that not every instance variable has an accessor, so it can't be called with obj.send(var_name) (the var_name has the "@" removed, so "@x" becomes "x")

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• Hot to get the fields in an Object via reflection?

  - by Apps

  I have an object (basically a VO) in Java and I don't know its type. I need to get values which are not null in that object. How can this be done?

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• is it possible to create object for interface without implementing this by any of the classes in jav

  - by Jothi

  Itest is an Interface. here i mentioned like new Itest(). Then is it means that i can create object for interface? public interface Itest { } static final Itest s = new Itest(){ }; It is just like, we could create object for interface without any class implement the interface.

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• Fill business object from database by calling stored procedurs?

  - by grady

  Hello, I have several stored procedures in my database, some of them have params, some have no params. I tried to fill a business object by calling the stored procedures, but failed so far. How could I do that dynamically? Later, I want to use this object as a datasource for a report...but thats the next step. The important facts are: different stored procs return different amount of columns stored procs can have params, but its not required How could I achieve that? Thanks :)

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• How to check if an Object is a Collection Type in Java ?

  - by Tony

  By using java reflection, we can easily know if an object is an array. What's the easiest way to tell if an object is a collection(Set,List,Map,Vector...)?

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