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• Neat way of calling InvokeRequired and BeginInvoke

  - by ho

  I seem to remember seeing some neat way of calling InvokeRequired and BeginInvoke to avoid repeating too much code in every event handler but I can't remember what that was. So does anyone know a neat way of writing that code?

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• Is there a programmatic way to determine whether the file is being used?

  - by AngryHacker

  Case and point: I need to open an Excel file via Interop and it would help a lot to avoid ugly COM errors if I knew that the file was in use. Other than trying to open the file and catching the exception, is there a programmatic way to determine whether the file is in use?

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• Stored Queries?

  - by phpeffedup

  Is it considered crazy to store common SQL queries for my web app in a database for use in execution? Or is that common practice? Or is it impossible? My thinking is, this way, I avoid hard-coding SQL into my application files, and add another level of abstraction. Is this crazy? Is this what a stored procedure is? Or is that something else?

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• Return statements for all functions

  - by emddudley

  How common is it for coding style guidelines to include a requirement that all functions include a return statement (including functions which return void)? To avoid being subjective or argumentative, I'd like answers which can name specific companies or open-source projects which have this requirement. If you haven't ever come across this coding style guideline, or you have a resource (book, online article) which discusses it, that would be useful as well. Thanks!

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• GDI+ Problem drawing a table

  - by Emanuel

  I try to draw a table on a panel in C# Windows Form by using GDI+. The problem is that when I minimize the application, my drawing disappears. How can I avoid this and why acting this way?

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• Is the "lock" statement in C# time-consuming?

  - by markattwood

  I have a method which has been called many times by other methods to hash data. Inside the method, some lock statements are used. Could you please let me know whether the lock statement is time-consuming and what is the best way to improve it. P/S: I have been finding a way to avoid using the lock statement in this method.

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• How to return an [out] variant with VT = VT_RECORD without creating memory leak in ole32.dll?

  - by picarodevosio

  Hi, Purify is pointing memory leak in ole32.dll while returning a Variant with VT set to VT_RECORD as OUT parameter. I am using User Marshalling by generating proxy/stub dll from IDL. Can you suggest how to avoid this memory leak? Thanks Picaro De Vosio

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• Migrate MySQL database to Sql Server

  - by RPK

  I recently encountered a problem in my production database due to MySQL bug. The bug is in the TimeStamp column. To avoid any inconvenience, I want to migrate the database to either Sql Server. Is there any FREE tool to easily and reliably migrate data and table structures?

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• In symfony how to use template from another context, i.e. get frontend template form backend

  - by eldar

  It's need for preview function in backend. I want to avoid duplicating templates. // in some backend module action $this->setTemplate(sfConfig::get('sf_apps_dir').'/frontend/modules/module/templates/tpl'); because context is backend, how about partials in tpl, routes and so forth?

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• how to close a sqlconnection in asp.net

  - by stighy

  Hi guys, i would like to know if there's something wrong in this asp.net code: mydatareader = mycmd.executeReader() if myDataReader.HasRow then // Do something end if myConnection.Close() If i avoid to call a "MyDataReader.Close()" does the connection close anyway ? I ask this because i'm assuming that if call a "MyConn.Close" it automatically close the associated datareader... or am i wrong ? Thanks

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• decorating a function and adding functionalities preserving the number of argument

  - by pygabriel

  I'd like to decorate a function, using a pattern like this: def deco(func): def wrap(*a,**kw): print "do something" return func(*a,**kw) return wrap The problem is that if the function decorated has a prototype like that: def function(a,b,c): return When decorated, the prototype is destroyed by the varargs, for example, calling function(1,2,3,4) wouldn't result in an exception. Is that a way to avoid that? How can define the wrap function with the same prototype as the decorated (func) one? There's something conceptually wrong?

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• Neat way of calling InvokeRequired and Invoke

  - by ho

  I seem to remember seeing some neat way of calling InvokeRequired and Invoke to avoid repeating too much code in every event handler but I can't remember what that was. So does anyone know a neat way of writing that code? Preferably for VB.Net 2005.

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• ViewStateMode in ASP.NET 4.0 - backward compatibility?

  - by rkrauter

  Was the new ViewStateMode property introduced to avoid breaking the existing EnableViewState? Does setting EnableViewState = false at the page level causee the ViewStateMode setting to be ignored? PS: What is CW in stackoverflow?

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• How can Perl's print add a newline by default?

  - by Mike

  In Perl most of my print statements take the form print "hello." . "\n"; Is there a nice way to avoid keeping all the pesky "\n"s lying around? I know I could make a new function such as myprint that automatically appends \n, but it would be nice if I could override the existing print.

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• Method parameters confusion

  - by elec

  Often time methods take more than 3 parameters which are all of the same type, eg. void mymethod (String param1, String param2, String param3) then it's very easy for the client to mix up the parameters orders, for instance inverting param1 and param2: mymethod (param2, param1, param3); ...which can be the cause of much time spent debugging what should be a trivial matter. Any tips on how to avoid this sort of mistake (apart from unit tests) ?

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• DataGridView inserting new row when filling column headers.

  - by fireBand

  DataGridView inserting an extra row every time I populate with data. The row appears even if I only fill the column headers. This is causing problems when I try to get values of each cell. Is there a way to avoid this perhaps in properties? Thanks in advance for any suggestions.

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• Overloading + to add two pointers

  - by iAdam

  I have a String class and I want to overload + to add two String* pointers. something like this doesn't work: String* operator+(String* s1, String* s2); Is there any way to avoid passing by reference. Consider this example: String* s1 = new String("Hello"); String* s2 = new String("World"); String* s3 = s1 + s2; I need this kind of addition to work. Please suggest.

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• Is it bad practice to allow dots in SVN tags/branches' names?

  - by abatishchev

  In my SVN repository tags are listed by version where name contains dots. e.g. 0.10 or 0.12.1 branches are named like proj-0.24-rc In the same time, for example in Mono project branches has not dots. Is it some practice to avoid dots? Could it be treated like extension delimiter (by web server where repository is been served), etc?

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• Why is my BeginInvoke method not async?

  - by Petr

  Hi, In order to avoid freezing of GUI, I wanted to run method connecting to DB asynchronously. Therefore I have written this: DelegatLoginu dl = ConnectDB; IAsyncResult ar=dl.BeginInvoke(null, null); bool result = (bool)dl.EndInvoke(ar); But it is still freezing and I do not understand why - I though BeginInvoke assures that method it references is run in another thread. Thank you!

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• Why is this event declared with an anonymous delegate?

  - by John_Sheares

  I have seen people define their events like this: public event EventHandler<EventArgs> MyEvent = delegate{}; Can somebody explain how this is different from defining it without it? Is it to avoid checking for null when raising the event?

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• Linking and Redirecting between multiple applications running under a single system folder

  - by Gurunandan

  I am running multiple applications with a single Codeigniter system/ folder using the recommended way on the Codeigniter wiki. Each application runs fine and I can link between apps using absolute URLs. Is there some way I can use or extend the URL helper class (functions like anchor(), redirect()... etc.) to generate links to controllers across applications. I would like to avoid absolute URLs Thanks!

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• How to use unset() for this Linear Linked List in PHP

  - by Peter

  I'm writing a simple linear linked list implementation in PHP. This is basically just for practice... part of a Project Euler problem. I'm not sure if I should be using unset() to help in garbage collection in order to avoid memory leaks. Should I include an unset() for head and temp in the destructor of LLL? I understand that I'll use unset() to delete nodes when I want, but is unset() necessary for general clean up at any point? Is the memory map freed once the script terminates even if you don't use unset()? I saw this SO question, but I'm still a little unclear. Is the answer that you simply don't have to use unset() to avoid any sort of memory leaks associated with creating references? I'm using PHP 5.. btw. Unsetting references in PHP PHP references tutorial Here is the code - I'm creating references when I create $temp and $this-head at certain points in the LLL class: class Node { public $data; public $next; } class LLL { // The first node private $head; public function __construct() { $this->head = NULL; } public function insertFirst($data) { if (!$this->head) { // Create the head $this->head = new Node; $temp =& $this->head; $temp->data = $data; $temp->next = NULL; } else { // Add a node, and make it the new head. $temp = new Node; $temp->next = $this->head; $temp->data = $data; $this->head =& $temp; } } public function showAll() { echo "The linear linked list:<br/>&nbsp;&nbsp;"; if ($this->head) { $temp =& $this->head; do { echo $temp->data . " "; } while ($temp =& $temp->next); } else { echo "is empty."; } echo "<br/>"; } } Thanks!

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• Keeping websites within an iframe

  - by Pasta

  Certain websites like Twitter, Flickr, etc avoid being stuck within an iframe. Is there any way to stop this from happening? I just need to see the public data so I am open to disabling Javascript, etc. How do I disable Javascript running on the iframe? Is this possible?

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• Use older version of MSVCR?

  - by user146780

  I have VS 2008 and I want my application to work with Windows 98 without needing to include MSVCR90.dll .. Win98 comes with MSVCR60 so how could I tell MSVC to do this? Is my only option to hunt down Visual studio 6? Thanks *also I want to avoid static linking msvcr

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• Possible to launch command line air app?

  - by gmoniey

  Is it possible to create a command line Abode Air app? I know thats not the intended use of the framework, but I have a lot of utility code written in as3, and I have a need to programatically run some utility functions from another app (not flash). I know I can pass command line parameters to the Air app, but I would like to avoid having a window pop up while the calculations are being made. Thanks.

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