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Articles indexed in March 2010

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  • Foreach over a collection of IEnumerables

    - by sdr
    I have 3 IEnumerables that I want to iterate over. I want to do something like this: IEnumerable<Car> redCars = GetRedCars(); IEnumerable<Car> greenCars = GetGreenCars(); IEnumerable<Car> blueCars = GetBlueCars(); foreach(Car c in (redCars + greenCars + blueCars)) { c.DoSomething(); } ... The best way I can think of is: ... List<Car> allCars = new List(); allCars.AddRange(redCars); allCars.AddRange(greenCars); allCars.AddRange(blueCars); foreach(car in allCars) { ... } ... Is there a more concise way to do this? Seems like combinding IEnumberables should be trivial.

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  • Easiest way to generate P/Invoke code?

    - by Ope
    I am an experienced .Net programer, but have not compiled a C/C++ program in my life. Now I have this C-dll, headers and documentation (3rd party, not from Win API), from which I need to call about ten methods. I was thinking of using Platform Invoke. I found these three tools that would create the code for me: PInvoker: http://www.pinvoker.com P/Invoke Interop Assistant: http://www.codeplex.com/clrinterop P/Invoke Wizard: http://www.paulyao.com/res/pinvoke/pinvoke.aspx and possibly Swig: http://www.swig.org/ Pinvoker seems to have a bit different approach than the Interop assistant and the Wizard. Swig I just found when checking that this question has not been asked here. What are the pros and cons of these tools? What would be the best = easiest and safest way for me to produce the P/Invoke code given that I don't know much about C/C++?

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  • open source project requirements

    - by skidding
    I know it's a very common question, but I don't see a previous one to be asked, since I'm interested in the basic steps, nothing in particular. It's the first time I want to license one of my projects, and it turns out, I don't know much about it. Let's say I want to use the MIT License. Do I just take the definition and paste it into my files? Does it need to be in ALL the files, or just one? or? I don't want any fancy rights so MIT has been recommended to me, do you suggest something else? I'm looking for impartial opinions. Thanks. What other aspects must I take into account? It's PHP, btw.

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  • MySQL: Transactions across multiple threads

    - by Zombies
    Preliminary: I have an application which maintains a thread pool of about 100 threads. Each thread can last about 1-30 seconds before a new task replaces it. When a thread end, that thread almost always will result in inserting 1-3 records into a table, this table is used by all of the threads. Right now, no transactional support exists, but I am trying to add that now. So... Goal I want to implement a transaction for this. The rules for whether or not this transaction commits or rollback reside in the main thread. Basically there is a simple function that will return a boolean. Can I implement a transaction across multiple connections? If not, can multiple threads share the same connection? (Note: there are a LOT of inserts going on here, and that is a requirement).

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  • Swift Mailer email sending problem

    - by air
    i have downloaded Swift Mailer from their website and try to send simple email with following code <?php require_once 'lib/swift_required.php'; $transport = Swift_SmtpTransport::newInstance('smtp.example.org', 25) ->setUsername('your username') ->setPassword('your password') ; $mailer = Swift_Mailer::newInstance($transport); //Create a message $message = Swift_Message::newInstance('Wonderful Subject') ->setFrom(array('[email protected]' => 'John Doe')) ->setTo(array('[email protected]', '[email protected]' => 'A name')) ->setBody('Here is the message itself') ; //Send the message $result = $mailer->send($message); ? once i run the page it gives error Warning: fsockopen() [function.fsockopen]: php_network_getaddresses: getaddrinfo failed: No such host is known. in E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php on line 233 Warning: fsockopen() [function.fsockopen]: unable to connect to smtp.fiveocean.net:25 (php_network_getaddresses: getaddrinfo failed: No such host is known. ) in E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php on line 233 Fatal error: Uncaught exception 'Swift_TransportException' with message 'Connection could not be established with host smtp.fiveocean.net [php_network_getaddresses: getaddrinfo failed: No such host is known. #0]' in E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php:235 Stack trace: #0 E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php(70): Swift_Transport_StreamBuffer->_establishSocketConnection() #1 E:\web_sites\swift_mail\lib\classes\Swift\Transport\AbstractSmtpTransport.php(101): Swift_Transport_StreamBuffer->initialize(Array) #2 E:\web_sites\swift_mail\lib\classes\Swift\Mailer.php(74): Swift_Transport_AbstractSmtpTransport->start() #3 E:\web_sites\swift_mail\test.php(33): Swift_Mailer->send(Object(Swift_Message)) #4 {main} thrown in E:\web_sites\swift_mail\lib\classes\Swift\Transport\StreamBuffer.php on line 235 if i remove the line $result = $mailer->send($message); then page execute and no error message display, as soon as i add above line to send email, i got error. my outgoing server, port and user id & passwords are correct in my file. Thanks

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  • File Folder copy

    - by Dario Dias
    Below is the VBScript code. If the file/s or folder exist I get scripting error, "File already exists". How to fix that? How to create folder only if it does not exist and copy files only that are new or do not exist in source path? How to insert the username (Point 1) after "Welcome" and at (Poin 3) instead of user cancelled? Can the buttons be changed to Copy,Update,Cancel instead of Yes,No,Cancel? (Point 2) The code: Set objFSO = CreateObject("Scripting.FileSystemObject") Set wshShell = WScript.CreateObject( "WScript.Shell" ) strUserName = wshShell.ExpandEnvironmentStrings( "%USERNAME%" ) Message = " Welcome to the AVG Update Module" & vbCR '1* Message = Message & " *****************************" & vbCR & vbCR Message = Message & " Click Yes to Copy Definition Files" & vbCR & vbCR Message = Message & " OR " & vbCR & vbCR Message = Message & " Click No to Update Definition Files." & vbCR & vbCR Message = Message & " Click Cancel (ESC) to Exit." & vbCR & vbCR X = MsgBox(Message, vbYesNoCancel, "AVG Update Module") '2* 'Yes Selected Script If X = 6 then objFSO.FolderExists("E:\Updates") if TRUE then objFSO.CreateFolder ("E:\Updates") objFSO.CopyFile "c:\Docume~1\alluse~1\applic~1\avg8\update\download\*.*", "E:\Updates\" , OverwriteFiles MsgBox "Files Copied Succesfully.", vbInformation, "Copy Success" End If 'No Selected Script If X = 7 then objFSO.FolderExists("Updates") if TRUE then objFSO.CreateFolder("Updates") objFSO.CopyFile "E:\Updates\*.*", "Updates", OverwriteFiles Message = "Files Updated Successfully." & vbCR & vbCR Message = Message & "Click OK to Launch AVG GUI." & vbCR & vbCR Message = Message & "Click Cancel (ESC) to Exit." & vbCR & vbCR Y = MsgBox(Message, vbOKCancel, "Update Success") If Y = 1 then Set WshShell = CreateObject("WScript.Shell") WshShell.Run chr(34) & "C:\Progra~1\avg\avg8\avgui.exe" & Chr(34), 0 Set WshShell = Nothing End if If Y = 3 then WScript.Quit End IF 'Cancel Selection Script If X = 2 then MsgBox "No Files have been Copied/Updated.", vbExclamation, "User Cancelled" '3* End if

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  • Instantiate object from Linq to XML Query

    - by objectsbinding
    Hi All I have the following class public class CountrySpecificPIIEntity { public string Country { get; set; } public string CreditCardType { get; set; } public String Api { get; set; } public List<String> FilterList { get; set; } } I am trying to use a linq to XMl query to create a list of instances of type CountrySpecificPIIEntity. The XML is as below <piisettings> <country countrycode="DE"> <creditcardype credicardtype="mastercard"> <api api="INSERT_FILTERS"> <filters> <filter>FIRSTNAME</filter> <filter>HOUSENUMBER</filter> <filter>ADDITIONALADDRESSINFO</filter> <filter>EMAIL</filter> </filters> </api> </creditcardype> <creditcardype credicardtype="visa"> <api api="INSERT_FILTERS"> <filters> <filter>STATE</filter> <filter>EMAIL</filter> </filters> </api> </creditcardype> <creditcardype credicardtype="visa"> <api api="UPDATE_FILTERS"> <filters> <filter>STATE</filter> <filter>EMAIL</filter> </filters> </api> </creditcardype> </country> <country countrycode="GB"> <creditcardype credicardtype="americanexpress"> <api api="INSERT_FILTERS"> <filters> <filter>STREET</filter> <filter>ZIP</filter> <filter>CITY</filter> <filter>STATE</filter> <filter>EMAIL</filter> </filters> </api> </creditcardype> <creditcardype credicardtype="debank"> <api api="INSERT_FILTERS"> <filters> <filter>IPADDRESSCUSTOMER</filter> <filter>FIRSTNAME</filter> <filter>SURNAME</filter> <filter>HOUSENUMBER</filter> <filter>STREET</filter> <filter>ZIP</filter> <filter>CITY</filter> <filter>STATE</filter> <filter>EMAIL</filter> </filters> </api> </creditcardype> </country> </piisettings> what should the Linq to XML query be?

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  • Sanitising user input using Python

    - by Steve
    What's the best way to sanitise user input for a Python-based web application? Is there a single function to remove HTML characters and any other necessary characters combinations to ensure that an XSS or SQL injection attack isn't possible?

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  • Where to go after PHP?

    - by sub
    I'm starting to get sick of PHP and search for a web-development language with future. What to learn next? Can I rely on the availability of Ruby (on Rails) on my client's hosters? Could Django be a better choice?

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  • Working with PHP Octals and String conversions

    - by krio
    I'm working with a database that has a bunch of serial numbers that are prefixed with leading 0's. So a serial number can look like 00032432 or 56332432. Problem is with PHP I don't understand how the conversion system with octals works. A specific example is that I'm trying to convert and compare all of these integer based numbers with strings. Is it possible to convert an octal, such as 00234 to a string like "00234" so that I can compare it?

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  • This Week on the Green Data Center Management Front

    Among the big news this week in green data center management: Horizon Data Center Solutions announces a partnership with Power Loft, Cisco, GDSYS, and Incheon Metropolitan City partner to build a next-generation green data center, and Vycon Energy demonstrates how its flywheel backup power systems can be used for health-care data system power backup.

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  • DynaTrace Beefs Up Support for Microsoft Applications

    The application performance management vendor ups support for platforms such as SharePoint Server, Dynamics CRM, and Visual Studio 2010....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Dynamic User Specific CSS Selection at Run Time

    I had a cool question while I was at MIX. A developer needed the ability to have his site render pages using a CSS file selected based on some user specific criteria. ASP.NET 4 controls generate CSS friendly output and more and more we web developers are using CSS for layout etc. Using multiple CSS files in our site wide templates we can not only provide different aesthetic experiences but we can chage the style based on the device type (Printer ot Phone) or the special needs of the end user...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Are there any statistics on the number of networks using Ethernet Jumbo frames?

    - by Russell Heilling
    I am often told by Sales Engineers and Product managers that a Layer 2 Ethernet service is not fit for purpose if the maximum supported frame size is in the 1518-1522 range (enough to support standard Ethernet frames or VLAN tagged frames). Or in other words: an MTU of 1500 is not enough (see this blog post for my definition of MTU and a short rant on how the term is often misused) I am never able to get any details from them on: a) What proportion of customers (Enterprise / SMB) require Jumbo frames b) What are typical expectations on frame size for Jumbos on WAN links? 1600, 2000, 9k, etc... I know that in Telco and Data Centre environments Jumbos are pretty common, but I am after some insight as to how common this is within Enterprise and SMB networks.

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  • Run application or script on Windows RDC connection

    - by NickLarsen
    I checked this thread, but it did not solve my exact problem. I need to run a script on when a connection is made across my network using windows remote desktop connection. The thread listed above works for the initial login, however, if I don't log out (which is necessary for some processes running on my network), then it wont run the script again the next time someone connects to the system using remote desktop connection. Previously we were using pcAnywhere to achieve this, however after running into some graphical issues with pcAnywhere, we have decided to move away from it to RDC. For a little more information, we need to have an email sent out anytime a connection is made to particular machines. The login name will always be the same for those systems and we do not log off when closing the connection.

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