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• Datanucleus/JDO Level 2 Cache on Google App Engine

  - by Thilo

  Is it possible (and does it make sense) to use the JDO Level 2 Cache for the Google App Engine Datastore? First of all, why is there no documentation about this on Google's pages? Are there some problems with it? Do we need to set up limits to protect our memcache quota? According to DataNucleus on Stackoverflow, you can set the following persistence properties: datanucleus.cache.level2.type=javax.cache datanucleus.cache.level2.cacheName={cache name} Is that all? Can we choose any cache name? Other sources on the Internet report using different settings. Also, it seems we need to download the DataNucleus Cache support plugin. Which version would be appropriate? And do we just place it in WEB-INF/lib or does it need more setup to activate it?

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• Javascript setters/getters

  - by Martin Hansen

  var author = { firstname: 'Martin', lastname: 'Hansen' } function settersGetters(propStr) { for (var i = 0; i < propStr.length; i++) { author['_'+ propStr[i]] = null; author.__defineGetter__(propStr[i], function() { return author['_'+ propStr[i]]; }); author.__defineSetter__(propStr[i], function(val) { author['_'+ propStr[i]] = val; }); }; } The above code would hopefully generate setters/getters for any supplied properties (in an array) for the object author. But when I call the below code Both firstname and lastname is olsen.. What am I doing wrong? settersGetters(['firstname', 'lastname']); author.firstname = 'per'; author.lastname = 'olsen'; console.log(author.firstname); console.log(author.lastname);

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• Can an interface be implemented across an aggregate/composite class in vb.net?

  - by Casey

  VB.NET .NET 3.5 I have an aggregate class called Package as part of a shipping system. Package contains another class, BoxType . BoxType contains information about the box used to ship the package, such as length, width, etc. of the Box. Package has a method called GetShippingRates. This method calls a separate helper class, ShipRater, and passes the Package itself as an argument. ShipRater examines the Package as well as the BoxType, and returns a list of possible shipping rates/methods. What I would like to do is construct an Interface, IRateable, that would be supplied to the helper class ShipRater. So instead of: Class ShipRater Sub New(SomePackage as Package) End Sub End Class we would do: Class ShipRater Sub New(SomePackage as IRateable) End Sub End Class However, ShipRater requires information from both the Package and its aggregate, BoxType. If I write an interface IRateable, then how can I use the BoxType properties to implement part of the Interface? Is this possible?

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• Set saxon DocumentBuilderFactoryImpl features using javax.xml interface.

  - by Mycol

  Here what I have. System.setProperty( "javax.xml.parsers.DocumentBuilderFactory", "net.sf.saxon.dom.DocumentBuilderFactoryImpl"); DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); //factory.setNamespaceAware(true); //factory.setIgnoringElementContentWhitespace(true); //factory.setValidating(false); //factory.setIgnoringComments(true); DocumentBuilder builder = factory.newDocumentBuilder(); Document xml = builder.parse(file.getAbsolutePath()); Saxon parser doesn't allow me to set the commentet properties: javax.xml.parsers.ParserConfigurationException: Saxon parser does not allow whitespace in element content to be ignored at net.sf.saxon.dom.DocumentBuilderFactoryImpl.newDocumentBuilder(DocumentBuilderFactoryImpl.java:98) I thought i could set those features in other way, like factory.setAttribute(string, bool) factory.setFeature(string, bool) But I can't find anywhere the values for "string". I tried net.sf.saxon.FeatureKeys whitout success. My question is: what's the correct way to do that?

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• Positiong loaded object based on root stage instead of MC that is loaded from root.

  - by Hwang

  I have a root stage, and a MC that is called from the root stage.Now from that MC, i will called in another MC2, and I wanted to placed the MC in the center of the stage. The reason I could not use normal ADDED_TO_STAGE at MC and define the center is because MC is not place in the exact position of the root stage (as in x, y=0). So if I would target MC2 at MC stage center, it would not be the exact center of the root stage/screen. How can I called the root stage properties rather than adding MC2 into the stage?

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• XslCompiledTransform eats my DOCTYPE!

  - by pukipuki

  Made a xslt template with output instruction for <DOCTYPE> <xsl:output media-type="text/html" method="html" encoding="windows-1251" doctype-public="-//W3C//DTD XHTML 1.1//EN" doctype-system="http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd" omit-xml-declaration="yes"/> In xsl-debug I'm receiving right <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> on top of the html. But when I'm using XslCompiledTransform etc.. output starts from <html xmlns="http://www.w3.org/1999/xhtml">. So, Doctype is missed. Why? Right properties of XslCompiledTransform initialized just like I set in . How can I get DOCTYPE from XslCompiledTransform?

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• Memory leak in WPF app due to DelegateCommand.

  - by Abdullah BaMusa

  I just finished desktop apps written in WPF and c# using MVVM pattern. In this app I used Delegate Command implementation to wrap the ICommands properties exposed in my ModelView. The problem is these DelegateCommands prevent my ModelView and View from being garbage collected after closing the view. So it stays larking until I terminate the whole application. I profile the application I find it’s all about delegatecommand that keeping the modelview in memory. How could I avoid this situation and is this in nature of mvvm pattern, or it’s about my implantation of the pattern?. Thanks

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• Effective file permissions tool's api in windows

  - by apoorv020

  Starting from Windows Server 2003, Windows included a new tool which calculates the effective permissions for a user (basically it resolves all groups access and takes care of all "deny" permissions as well). An example in point is that a user A belongs to groups B and C. B has been denied read permissions on a file F, while C has been allowed read and write permissions on the file and I want to calculate the effective permissions user A has on file F. This tool is available on Windows Server 2003,Vista,7 and Server 2008 by right clicking on a file and going to properties - security - advanced - effective permissions. What I need is an API in C# which does the same job. The most common FILE API returns access rules (class FileAccessRules), but there seems to be no direct way to calculate effective permissions from these set of access rules. Note: I do not want to process effective permissions in the code if at all possible, but am ready to do so as a last resort.

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• What is the role of interfaces IOPCServer, IOPCDataItem, IOPCGroup in OPC ( OLE for process control)

  - by Shailesh Jaiswal

  I am currently new in OPC ( OLE for process control). I want to know about the interfaces IOPCServer, IOPCDataItem, IOPCGroup interfaces in the OPC. What are they used for & what is their role in terms of OPC Client & OPC Server & what methods & properties these interfaces conatins ? Can you provide me the answer for the above questions or can you provide me the link through which I can get the knowledge of the above topics ?

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• Initializing a List c#

  - by Mohan

  List<Student> liStudent = new List<Student> { new Student { Name="Mohan",ID=1 }, new Student { Name="Ravi",ID=2 } }; public class Student { public string Name { get; set; } public int ID { get; set; } } Is there other way to write this? I am a newbie. I want to make instance of student class first and assign properties in list.

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• Setting up SSL on apache on linux ubuntu

  - by ThomasReggi

  I'm trying to get SSL to run on my apache web server. I do not have the DNS for the domain setup yet is that an issue? How do I setup SSL on my web server? When I start apache it fails. root@vannevar:/etc/apache2/ssl# service apache2 start * Starting web server apache2 Action 'start' failed. The Apache error log may have more information. The log stats that it's unable to read the certificate. [Thu Jun 28 15:01:02 2012] [error] Init: Unable to read server certificate from file /etc/apache2/ssl/www.example.com.csr [Thu Jun 28 15:01:02 2012] [error] SSL Library Error: 218529960 error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag [Thu Jun 28 15:01:02 2012] [error] SSL Library Error: 218595386 error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1 error The contents of /etc/apache2/httpd.conf ServerName [SERVERIP] The contents of /etc/apache2/ports.conf # If you just change the port or add more ports here, you will likely also # have to change the VirtualHost statement in # /etc/apache2/sites-enabled/000-default # This is also true if you have upgraded from before 2.2.9-3 (i.e. from # Debian etch). See /usr/share/doc/apache2.2-common/NEWS.Debian.gz and # README.Debian.gz NameVirtualHost [SERVERIP]:443 NameVirtualHost *:80 Listen 80 <IfModule mod_ssl.c> # If you add NameVirtualHost *:443 here, you will also have to change # the VirtualHost statement in /etc/apache2/sites-available/default-ssl # to <VirtualHost *:443> # Server Name Indication for SSL named virtual hosts is currently not # supported by MSIE on Windows XP. Listen 443 </IfModule> <IfModule mod_gnutls.c> Listen 443 </IfModule> The contents of /etc/apache2/sites-available/www.example.com <VirtualHost *:80> ServerAdmin [email protected] ServerName example.com ServerAlias www.example.com DocumentRoot /srv/sites/example.com/public/ ErrorLog /srv/sites/example.com/logs/error.log CustomLog /srv/sites/example.com/logs/access.log combined </VirtualHost> <VirtualHost [SERVERIP]:443> SSLEngine On SSLCertificateFile /etc/apache2/ssl/www.example.com.csr SSLCertificateKeyFile /etc/apache2/ssl/www.example.com.key SSLCACertificateFile /etc/apache2/ssl/comodo.crt ServerAdmin [email protected] ServerName example.com ServerAlias www.example.com DocumentRoot /srv/sites/example.com/public/ ErrorLog /srv/sites/example.com/logs/error.log CustomLog /srv/sites/example.com/logs/access.log combined </VirtualHost>

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• Better Alternative to Case Statement

  - by Kyle Rozendo

  Hi All, I currently have a switch statement that runs around 300 odd lines. I know this is not as giant as it can get, but I'm sure there's a better way to handle this. The switch statement takes an Enum that is used to determine certain properties that pertain to logging. Right now the problem sets in that it is very easy to leave out an enumeration value and that it will not be given a value as it is not in the switch statement. Is there an option one can use to ensure that every enumeration is used and given a custom set of values it needs to do its job? Thanks, Kyle

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• ASP MVC Set RadioButton From Database

  - by Jacob Huggart

  Hello All, I have what should be an easy question for you today. I have two radio buttons in my view: Sex: <%=Html.RadioButton("Sex", "Male", true)% Male <%=Html.RadioButton("Sex", "Female", true)% Female I need to select one based on the value returned from my database. The way I am trying to do it now is: ViewData["Sex"] = data.Sex; //Set radio button But that is not working. I have tried every possible combination of isChecked properties. I know that data.Sex is returning either "Male" or "Female". What do I need to do to check the appropriate radio button?

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• Read and write into a file using VBScript

  - by Maddy

  How can we read and write some string into a text file using VBScript? I mean I have a text file which is already present so when I use this code below:- Set fso = CreateObject("Scripting.FileSystemObject" ) Set file = fso.OpenTextFile("C:\New\maddy.txt",1,1) This opens the file only for reading but I am unable to write anything and when I use this code:- Set fso = CreateObject("Scripting.FileSystemObject" ) Set file = fso.OpenTextFile("C:\New\maddy.txt",2,1) I can just use this file for writing but unable to read anything. Is there anyway by which we can open the file for reading and writing by just calling the OpenTextFile method only once. I am really new to VBScript. I am only familiar with C concepts. Is there any link to really get me started with VBScript? I guess I need to have a good knowledge of the objects and properties concepts.

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• how to set a pop up menu on a particular table view item

  - by Moayyad Yaghi

  hello i have a QTableView , and i need to show a popup menu that shows the item properties . i need to set the context menu to apear only when you right click over a particular items in that tableview. but coudln't find a way to do it . i can set the context menu to appear when your over the table . i cant have it for each item . so how do i set the context menu over items in the tableview ? please tell me if the idea was not clear enough thanks in advance

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• Keystrokes in Winforms app causing window to close unexpectedly

  - by Paul Sasik

  I have a strange issue that has arisen recently: Whenever I enter text, even a single character, into a textbox in any Form in my application it causes the form and its parent to close. I've checked for the following so far: Errant/mis-assigned event handlers that may be interpreting a keystroke as a Form cancel I am using keypreview in several windows but debugging shows this to not be a cause Happens in any form of the application Happens even with brand new text boxes dropped on the form Tried removing the WithEvents declaration from text box declarations (VB.NET) The result is DialogResult.Cancel when I break the code after Show or ShowDialog The forms do not use AcceptButton or CancelButton properties (set to none) Note: I am modifying a large codebase with a lot of code that I have yet to touch What else could be causing this strange behavior?

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• Capturing SOAP requests to an ASP.NET ASMX web service

  - by pcampbell

  Consider the requirement to log incoming SOAP requests to an ASP.NET ASMX web service. The task is to capture the raw XML being sent to the web service. The incoming message needs to be logged for debug inspection. The application already has its own logging library in use, so the ideal usage would be something like this: //string or XML, it doesn't matter. string incomingSoapRequest = GetSoapRequest(); Logger.LogMessage(incomingSoapRequest); Are there any easy solutions to capture the raw XML of the incoming SOAP requests? Which events would you handle to get access to this object and the relevant properties?

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• NHibernate illegal access to loading collection error

  - by Rob

  I'm getting the error "Illegal acces to loading collection" when i'm trying to get a list of variants belonging to a certain product. The NHibernate mapping is as below; <list name="Variants" lazy="false" cascade="save-update" inverse="false" table="PluginProduct_ProductVariant"> <key column="ProductId" /> <index column="Ordinal" /> <one-to-many class="Plugin.Product.Business.Entities.Variant, Plugin.Product" /> </list> </joined-subclass> I already tried chancing the laziness and inverse properties as suggested in other topics on this site, but they didn't do the trick.

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• .NET Framework 4 RTM on Windows server 2008 R2

  - by mare

  I've just installed .NET 4 on Windows SErver 2008 R2 x64 and I am getting 500 Internal Server Error with an ASP.NET MVC application which was previously running fine on 3.5. The application was upgraded from targeting 3.5 to target 4 and I personally built it today on my development machine (changed in VS - Properties to .NET Framework 4). On the server I installed .NET Framework 4 Client profile and Full both automatically through the Web Platform Installer. ASP.NET MVC 2 was also installed through Platform Installer. I created a new .NET 4 application pool in IIS and placed the web app in it. Also I have custom errors turned Off in web.config but even so no detailed error is displayed - just the plain IIS 7.5 500 Internal Server Error. Any suggestions?

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• Efficiently Combine MatchCollections in .Net Regex

  - by Laramie

  In the simplified example, there are 2 Regular Expressions, one case sensitive, the other not. The idea would be to efficiently create an IEnumerable collection (see "combined" below) combining the results. string test = "abcABC"; string regex = "(?<grpa>a)|(?<grpb>b)|(?<grpc>c)]"; Regex regNoCase = new Regex(regex, RegexOptions.IgnoreCase); Regex regCase = new Regex(regex); MatchCollection matchNoCase = regNoCase.Matches(test); MatchCollection matchCase = regCase.Matches(test); //Combine matchNoCase and matchCase into an IEnumerable IEnumerable<Match> combined= null; foreach (Match match in combined) { //Use the Index and (successful) Groups properties //of the match in another operation } In practice, the MatchCollections might contain thousands of results and be run frequently using long dynamically created REGEXes, so I'd like to shy away from copying the results to arrays, etc. I am still learning LINQ and am fuzzy on how to go about combining these or what the performance hits to an already sluggish process will be.

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• PHP intersection between array and object

  - by nickf

  I have an object, let's say it's like this: class Foo { var $b, $a, $r; function __construct($B, $A, $R) { $this->b = $B; $this->a = $A; $this->r = $R; } } $f = new Foo(1, 2, 3); I want to get an arbitrary slice of this object's properties as an array. $desiredProperties = array('b', 'r'); $output = magicHere($foo, $desiredProperties); print_r($output); // array( // "b" => 1, // "r" => 3 // )

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• How listen for UIButton state change?

  - by morticae

  I'm extending UIButton with generic functionality to change certain appearance attributes based on the displayed title. In order to do this, I need to detect and respond to changes in the "state" property. This is so I make sure the appearance is adjusted properly if the user has set different titles for different states. I assumed I would need to use some sort of KVO like the following: [self addObserver:self forKeyPath:@"state" options:NSKeyValueObservingOptionNew context:nil]; But this does not seem to fire the observeValueForKeyPath:... method for @"state" or @"currentTitle". I assume this is because UIButton does not implement the KVO pattern for those properties. I do not want to just listen for clicks. Those events cause a state change, but are not the only potential causes. Does anyone know a way to listen to and respond to state changes of a UIButton? Thanks

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• Building Visual studio like application, need inputs..

  - by akjoshi

  Hi, I am working on a Visual studio like application i.e. hava a tolbox, an editor and property grid similar to VS. ser can drag and drop the controls(custom and third party) to the editor window and perform operations like resize, move, align, group etc.; Properties of that control needs to be displayed in property grid and user can update them from there. As per my current understanding I will have to extend the Canvas to create my own editor and and Interface for controls which it supports; Each supported control will have to implemnt this interface so that it can be placed in our editor. Something similar to this - http://www.codeproject.com/KB/WPF/WPFDiagramDesigner_Part4.aspx Looking forward for any kind of help, comment or links.

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• May a NSManagedObjectContext re-fault objects automatically?

  - by frenetisch applaudierend

  I am trying to create an application which allows background threads to update core data objects while the user might be reading the same data. My approach to this would be to use multiple NSManagedObjectContexts and then before a background thread does a -save: operation, I fetch the object the user is currently working on and fire the fault for all its properties and relationships recursively. This way I have all objects the user could act with in my NSManagedObjectContext without seeing the already updated values. But this can only work if the NSManagedObjectContext cannot decide himself that e.g. memory usage is too high, and starts faulting objects which I do not explicitly reference (other than through the NSManagedObject relationship). So the question is, can the NSManagedObjectContext decide that an object needs to be re-faulted, without intervention from my side? Thanks for your effort, Markus

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• LINQ OrderBy: best search results at top of results list

  - by p.campbell

  Consider the need to search a list of Customer by both first and last names. The desire is to have the results list sorted by the Customer with the most matches in the search terms. FirstName LastName ---------- --------- Foo Laurie Bar Jackson Jackson Bro Laurie Foo Jackson Laurie string[] searchTerms = new string[] {"Jackson", "Laurie"}; //want to find those customers with first, last or BOTH names in the searchTerms var matchingCusts = Customers .Where(m => searchTerms.Contains(m.FirstName) || searchTerms.Contains(m.LastName)) .ToList(); /* Want to sort for those results with BOTH FirstName and LastName matching in the search terms. Those that match on both First and Last should be at the top of the results, the rest who match on one property should be below. */ return matchingCusts.OrderBy(m=>m); Desired Sort: Jackson Laurie (matches on both properties) Foo Laurie Bar Jackson Jackson Bro Laurie Foo How can I achieve this desired functionality with LINQ and OrderBy / OrderByDescending?

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