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• Is there a straightforward way to have a ThreadStatic instance member?

  - by Dan Tao

  With the ThreadStatic attribute I can have a static member of a class with one instance of the object per thread. This is really handy for achieving thread safety using types of objects that don't guarantee thread-safe instance methods (e.g., System.Random). It only works for static members, though. Is there some corresponding attribute that provides the same functionality, but for instance members? In other words, that allows me to have one instance of the object, per thread, per instance of the containing class?

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• What are the standard practices for throwing Javascript Exceptions?

  - by T.R.

  w3schools says that exceptions can be strings, integers, booleans, or objects, but the example given doesn't strike me as good practice, since exception type checking is done through string comparison. Is this the preferred method of exception handling in Javascript? Are there built-in exception types (like NullPointerException)? (if so, what are they, what kind of inheritance do they use, and are they preferred over other options?)

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• Formatting dates when serialising an object in C# (2.0)

  - by zoman

  Hi, I'm xml-serializing a object with a large number of properties and I have two properties with DateTime types. I'd like to format the dates for the serialized output. I don't really want to implement the ISerializable interface and overwrite the serialization for every property. Is there any other way to achieve this? (I'm using C#, .NET 2) Thanks.

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• Relational Database arrays (H2, Java)

  - by Daddy Warbox

  I seem to have two options on how to implement arrays, and I want to know which I should go with: Use the ARRAY data type and (from what I understand) effectively serialize data objects into the database (which in my case are just wrapped primitive types; don't know of another way to make this work). Use a separate table and map with foreign keys for each array item. If you have experience with this (especially with H2), which would you recommend?

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• Import fixed width file to oracle

  - by Alex Blokha

  Is there an ability to import fixed width file to oracle? Preferably through .net(c#) for catching errors during import and showing them to user. P.S. File has 5 types of rows. For example 1 row has 5 columns, 2-nd has 50 columns.

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• check if sqlserver is installed on a machine thro C#

  - by Skun

  Hey ! I am making an application which is a user interface to access 2 types of databases - SQLite and MSSQL server. The thing is, SQLite doesnt need to be "installed" since its just a flatfile database, but on the other hand, SQLserver (Express/normal) need to be installed before use. My Question is simple: Is there a way by which i can find out if an instance of SQLserver has been installed on the local machine by using a C# program?

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• ConcurrenctBag(Of MyType) Vs List(Of MyType)

  - by Ben

  What is the advantage of using a ConcurrentBag(Of MyType) against just using a List(Of MyType)? The MSDN page on the CB (http://msdn.microsoft.com/en-us/library/dd381779(v=VS.100).aspx) states that ConcurrentBag(Of T) is a thread-safe bag implementation, optimized for scenarios where the same thread will be both producing and consuming data stored in the bag So what is the advantage? I can understand the advantage of the other collection types in the Concurrency namespace, but this one puzzled me. Thanks.

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• How to test chrome extensions?

  - by swampsjohn

  Is there a good way to do this? I'm writing an extension that interacts with a website as a content script and saves data using localstorage. Are there any tools, frameworks, etc. that I can use to test this behavior? I realize there are some generic tools for testing javascript, but are those sufficiently power to test an extension? Unit testing is most important, but I'm also interested in other types of testing (such as integration testing).

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• Changes to the user story after the sprint has started

  - by Mel

  What types changes/additions/further clarifications do you think are ok to make to a user story? what changes/additions/further clarifications do you think are not ok to have happen to the user story?

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• Manage 2 displays remotely

  - by neurino

  I have a pc with a nVidia Quadro graphic card. The card has 2 DisplayPort outs where 2 40" Full HD TV are connected. I need to run 2 separate fullscreen videos, one each display. The problem is displays are far from the pc station and I cannot control them from there. I tried with a remote desktop connection but when I connect screen 1 shows login and screen 2 simply blackens (I'm logged off). The pc, an HP, also has his native graphics card still installed it would be nice if I could connect there a 15" monitor with the desktop on and use the TVs only as secondary where I can send fullscreen videos. Any clue?

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• Invoking static methods containing Generic Parameters using Reflection.

  - by AJP

  While executing the following code i gets this error "Late bound operations cannot be performed on types or methods for which ContainsGenericParameters is true." class Program { static void Main(string[] args) { MethodInfo MI = typeof(MyClass).GetMethod("TestProc"); MI.MakeGenericMethod(new [] {typeof(string)}); MI.Invoke(null, new [] {"Hello"}); } } class MyClass { public static void TestProc<T>(T prefix) { Console.WriteLine("Hello"); } } Please help.

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• Regular expression with no maximum limit

  - by KhanS

  I Need a regular expression which accepts all types of characters (alphabets, numbers and all special characters), and miniumum number of characters should be 15 and no limit for maximum characters.

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• Drawing your own tab bar ?

  - by Aryabhatt

  Hi all , I want to customize my tab bar user interface some thing like this . So can anyone tell me how to prepare these types of ui layout or rendering ? Thanks ,

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• Can we change the text/background color of an individual property in PropertyGrid

  - by Charvak

  I have a .NET PropertyGrid control which displays properties of some class. I want to change the color or font or background color(it doesn't matter just that they look different from the other displayed properties) of some property. I can do with writing custom editor but I was wondering If an easier method exists? If I use custom editor then how do i change the editor of built-in types like bool, int etc. Thanks

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• Overloading with same parameter signature

  - by Soham

  In C#, is it possible to have same parameters yet override each other(they are different in the return types) public override Stocks[] Search(string Field,string Param){ //some code} public override Stocks Search(string Field, string Param){//some code} C# returns compilation error

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• Font sizes in Telerik controls

  - by Young Ninja

  What's the easiest way to set the font sizes for ALL telerik control to a single value? I believe you can control fonts by modifying the CC of a specific control, but that's a pain because I am using many different control types...

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• Filesize checks for integrity checks

  - by atwellpub

  Hey I'm wanting to have an integrity check on a software that will be distributed to many different types of servers. Can I use PHP's filesize() comparisons safely... for example will a filesize that is 745 on my server be 745 across all other servers?

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• Implementing prototypes OR instantiating class objects

  - by intuited

  I'm wondering how to implement prototypal inheritance in Python. It seems like the way to do this would be to either use a metaclass to cause instantiations to actually be classes, rather than objects, or use some magical powers to transform an existing object into a class. The second method would seem to be more flexible, in that it could be applied to existing objects of varied types, while the first would likely be more convenient for typical use cases. Insights on the practicality of these two approaches, as well as alternative suggestions, are hereby requested.

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• How to list all files in a repository in Mercurial (hg)?

  - by JamesWampler

  Is there a command in mercurial that will list all files currently under source control? I can do a dir /s to list all files in my folder and subfolders, but I have no idea which have been added to my repository. I have a variety of excluded file types and folders and I want verify that none of them were added before I set them up in my .hgignore file.

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• Is there a straightforward way to have a thread-local instance variable?

  - by Dan Tao

  With the ThreadStatic attribute I can have a static member of a class with one instance of the object per thread. This is really handy for achieving thread safety using types of objects that don't guarantee thread-safe instance methods (e.g., System.Random). It only works for static members, though. Is there any straightforward way to declare a class member as thread-local, meaning, each class instance gets an object per thread?

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• Is there a way to create a WCF DataContract on a third party type?

  - by Michael Hedgpeth

  I am migrating to wcf and trying to figure out how I'm going to declare my Data Contracts properly. Some of the types I have been demoting are from a third party that I am unable to change. Are attributes the only way to explicitly declare data contracts in wcf? I know about the auto data contract functionality in 3.5, but the books I'm readin discourage that. And besides, that way assumes all state is publically available, which is oftentimes not the case.

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• How to convert image sequences (PNG) into Animation File (gif/mov/others) (iPhone) ?

  - by JohnMulder

  I have a sequence of images (PNG format) in my iphone app. It is saved in the app's sandbox doc folder. How do I create animation file from these images? I would prefer animated gif, but other types like video (mov/avi/etc) is ok too. I don't need audio. Just images. Thanks.

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• Can Doctrine 1.2 handle custom data type like geometry data type?

  - by Carson

  I want to create tables that contain geometry data types (Mysql spatial extension). which steps are needed to map these with Doctrine 1.2? Any idea how is the codes of yaml mapping and corresponding modal class for custom data mapping with Doctrine 1.2? Thanks.

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• How do I override file.write() under Python 3?

  - by Sorin Sbarnea

  Below works on Python 2.6 but on Python 3.x it doesn't: old_file_write = file.write class file(): def write(self, d): if isinstance(d, types.bytes): self.buffer.write(d) else: old_file_write(d) # ... do something like f = open("x") f.write("...") The problems is that with Python 3.x the first like will generate an error: NameError: name 'file' is not defined How can I make this work on Python 3.x? PS. In fact I'm looking for a solution that will work on both versions.

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• what is the difference between DWORD and HANDLE type in C?

  - by moon

  i have a thread with return type DWORD in c but it is then handled by a HANDLE type pointer, what is difference between these two types?

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