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• Why don't purely functional languages use reference counting?

  - by Zifre

  In purely functional languages, data is immutable. With reference counting, creating a reference cycle requires changing already created data. It seems like purely functional languages could use reference counting without worrying about the possibility of cycles. Am is right? If so, why don't they? I understand that reference counting is slower than GC in many cases, but at least it reduces pause times. It would be nice to have the option to use reference counting in cases where pause times are bad.

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• How to change default image of derived ToolStripButton?

  - by Special Touch

  It seems like a simple task. Create a C# class that derives from ToolStripButton. The derived ToolStripButton should behave exactly the same as the parent class in the designer and the application, except that the default image should be different. Surprisingly just changing the constructor is not sufficient: public CustomToolStripButton() { base.Image = (Image) new Bitmap(typeof(CustomToolStripButton), "CustomImage.bmp"); } When the ToolStripButton is displayed in the designer, the original default image is shown. There must be a simple solution. What could it be?

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• Is it possible to use Windows Authentication to logon to Axapta 4 (or 5) in a Website/webservice

  - by rdkleine

  Using this code I can not create a connection using IIS 7 with Windows Authentication. try { Axapta axapta = new Axapta(); axapta.Logon("", "", "", ""); //Or this> axapta.Logon("COMPANY", "NL-nl", "OBJECTSERVER", ""); System.Diagnostics.Debug.WriteLine("yep"); axapta.Logoff(); } catch (Exception ex) { System.Diagnostics.Debug.WriteLine(ex.ToString()); } When changing App Pool Identity to a user with rights in Axapta then I can create a connection. So it seems like the App Pool Identity is used. Is it even possible to get this do without using the LogonAs method? Is there some other way short of asking the user for they're credentials? Appreciate any help on this, Ralf

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• Converting Oracle date arithmetic to work in HSQLDB

  - by JBristow

  I'm trying to spot-test an Oracle backed database with hsqldb and dbunit, but I've run into a snag. The problem is with the following EJB-QL (simplified a bit): SELECT o FROM Offer o WHERE :nowTime BETWEEN o.startDate AND o.startDate + 7 This seems to only work in Oracle's version of SQL. What's the easiest way for me to convert this to work in both hsqldb and oracle? Assume that changing the two between arguments to named parameters is a very difficult refactor, so I'm going to favor answers that provides a more standardized analog to o.startdate + 7 EDIT: After doing some more research, it looks like Oracle converts the above snippet to o.startdate + INTERVAL '7' DAY which is apparently more standard, but doesn't work in HSQLDB.

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• Restrict RDP port based on a Dynamic DNS

  - by webnoob

  Hi All, I want to set a restriction on my firewall (windows firewall on windows 2008) to only allow connections from a certain dynamic DNS. Is this possible? The reason I ask is that this would allow us to just change the IP on the dynamic DNS if our IP changes and means we won't get locked out of RDP. This also allows me to RDP in from other locations that have IP's that are not static by just changing the IP against the DNS. Any ideas. Thanks in advance.

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• Running your own GAE server

  - by h2g2java

  The question http://stackoverflow.com/questions/2505265/how-difficult-is-it-to-migrate-away-from-google-app-engine triggered me to think about this issue again. I have read of someone running, production-wise, Google app engine development version on their own server. My questions are: Are there any security issues running GAE development on your own server in production mode and exposing it to the www? If so how to mitigate them? Can GAE dev be run on Amazon? Is it possible to port my GAE apps running on Google servers to a GAE running on Amazon, without code changes, but without changing any reference in using other gdata services such as google docs, youtube, gmail, etc. How to configure GAE dev server to use my own hadoop? Or to use Amazon's hadoop?

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• .Net Xml Serialize - XSD Definition for Multiple Namespaces

  - by MattH

  The following XML was generated by serializing .Net objects: <?xml version="1.0" encoding="utf-8"?> <Request xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://EPS.WebServices/WebServiceSchema" > <Method xmlns="http://EPS.Library/RequestSchema">PackPlacementUpdate</Method> <Type xmlns="http://EPS.Library/RequestSchema">PackPlacementUpdate</Type> </Request> I am using XSD to generate a schema. However, (I think) because there are multiple namespaces two different schema files get generated. We will be providing the XSD file externally and I'm concerned that two files will cause confusion. Without changing the namespace of the .Net classes, is there is a way I can create a single XSD schema file and not two? Thanks.

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• WinForms: finding the size of a minimized form without going to FormWindowState.Normal

  - by Doc Brown

  Is there an easy way to determine the size of a Form it does have in WindowState=Normal, without actually changing the Form state? Here is what I do now (C# code): public class MyForm: Form { public void MyMethod() { // ... FormWindowState oldState = this.WindowState; this.WindowState = FormWindowState.Normal; Point windowLocation = this.Location; Size windowSize = this.Size; this.WindowState = oldState; // ... } } This is what I would like the code to look like: public class MyForm: Form { public void MyMethod() { // no state change here Point windowLocation = this.NormalStateLocation; Size windowSize = this.NormalStateSize; } } In fact there are no NormalStateLocation or NormalStateSize properties in Windows Forms.

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• Sitecore - Rich Text Editor field is not saving information but instead just copying old information

  - by Younes

  We are using Sitecore.NET 5.3.1 (rev. 071114) and we found out a problem. When we are trying to change information in a Rich Text Editor field on the Master database and save the information, this information is not stored and instead the old information appears back into the RTE field. I have been trying this on the Web database on which this is not happening. However, changing this information on the web database feels useless because a publish will just change every information that does not correspond to the data in the Master database in which i just can't edit this field. So I'm having big trouble at this point since this is for one of our bigger customers and they really want this fixxed asap. We (Estate Internet) already have had an open ticket for this problem, but never got the solution. Hope that someone here knows what the problem may be.

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• Flex: vertical gap between list items not working

  - by pfunc

  I have a list item with buttons in it like so: <mx:List contentBackgroundAlpha="0" baseColor="0x333333" leading="10" id="weekButtonList" width="260" borderVisible="false" dataProvider="{_data.mappoints.week.@number}" itemClick="onWeekClick(event);" > <mx:itemRenderer > <mx:Component> <mx:Button buttonMode="true" width="260" height="50" label="Week {data}" /> </mx:Component> </mx:itemRenderer> </mx:List> No matter what I do, these buttons have a vertical gap inbetween them. I have tried everything from setting the "vertical-gap" property to negative and positive numbers as well as changing the padding-bottom and padding-top on them. I want the buttons to be right up against eachother vertically. I have also tried "button-height" and padding on the List component...still nothing. How do I control this?

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• Preventing $.POST hijack

  - by Jamie

  I'm currently building a facebook application. Lets say I have a variable $uid that identifies the user so I can store this in my database along with their submitted data. I pass $uid and $data via json encoded values using $.post. However, this doesn't prevent someone changing $uid to save data as someone else. I have been thinking about how to overcome this, so far I haven't found a solution apart from: create database with $uid $secretkey on first page load. When $.post send $secretkey with the post and then retrieve the $uid from the database. Would this be the correct approach to use?

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• remove cssclass from one anchor and assign to another in jquery...

  - by Pandiya Chendur

  Here are my anchors, <a ID="lnkbtn0" class="page-numbers" href="#">1</a> <a ID="lnkbtn1" class="page-numbers" href="#">2</a> <a ID="lnkbtn2" class="page-numbers" href="#">3</a> <a ID="lnkbtn3" class="page-numbers" href="#">4</a> And my click function i am adding a cssclass to show that it is the current anchor $("a.page-numbers").click(function() { $(this).addClass('page-numbers current'); }); What happens is when i click the next anchor the same class has been added to the current and the previous anchor... What can be done to remove the cssclass page-numbers current and assign cssclass page-numbers to the previous/all other anchors without changing the current one....

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• Certificate Information from WCF Service using Transport security mode

  - by Langdon

  Is there any way to pull information about which client certificate was used inside of my web service method when using <security mode="Transport>? I sifted through OperationContext.Current but couldn't find anything obvious. My server configuration is as follows: <basicHttpBinding> <binding name="SecuredBasicBindingCert"> <security mode="Transport"> <message clientCredentialType="Certificate" /> </security> </binding> </basicHttpBinding> I'm working with a third party pub/sub system who is unfortunately using DataPower for authentication. It seems like if I'm using WCF with this configuration, then I'm unable to glean any information about the caller (since no credentials are actually sent). I somehow need to be able to figure out whose making calls to my service without changing my configuration or asking them to change their payload.

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• There is another way to load MSHTML documents without use Application.ProcessMessages?

  - by douglaslise

  There is another way to load MSHTML documents without use Application.ProcessMessages? To load a document into a IHTMLDocument I need to do this: while Doc.readyState <> 'complete' do Application.ProcessMessages; I want not to process all the message queue during the loading, because I would be changing my application flow, in other words, some messages that should be processed after the loading to be completed can be processed earlier, even before the loading end. There is a special message code that the IHTMLDocument expect to advance in the loading process? Or there is another way to load? Thanks.

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• Create a polynomial object from a number using change-class

  - by charlieb

  I have written a polynomial class along the lines described in SICP 2.5.3 (except using defclass). I would like to be able to seamlessly add and multiply polynomials and regular numbers but I can't make change-class accept a number. I tried to simplify the problem by changing class from an integer to a float: (change-class 4 'float) but that gave me the error: There is no applicable method for the generic function #<STANDARD-GENERIC-FUNCTION CHANGE-CLASS (7)> when called with arguments (4 #<BUILT-IN-CLASS FLOAT>). [Condition of type SIMPLE-ERROR] I get an error of the same form from (fyi): (change-class 4 'polynomial) I'm going to go ahead and implement a manual conversion but I would prefer to use the built-in clos facilities.

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• producing pixel-identical images of text between Sun Java and OpenJDK

  - by yuvi

  My release script produces images of the version number to save me the trouble of manually going into the MoinMoin wiki software and changing it by hand for each release. Unfortunately, since the fonts look a little different on each platform's JVM, the result is ugly. I solved the the font inconsistency by using Lucide Sans (comes with every Java system). (Loading Fonts from TTF files was another option, but was buggy on Mac Java). The result is much better, producing the exact same image on Mac/Windows (), but a slightly different one on OpenJDK (). I believe this is caused by OpenJDK having a different font rendering system (as opposed to different fonts). Is there any way I can get all three of my target platforms (Sun Windows, Mac, OpenJDK Linux) to produce images of text that look identical?

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• Properly handling unicode characters in Rails

  - by Gdeglin

  By default Rails allows users of our application to input non-utf8 data, such as: ¶®«¼ However when we attempt to retrieve the data from our database and render it in a template Rails incorrectly assumes that it is in UTF-8 format and throws an error. ArgumentError: invalid byte sequence in UTF-8 What is the best way to handle this? I have seen one fix that suggested sanitizing the data in every place the user can input it. However, that would involve changing a considerable amount of code and it would strip out the characters entirely. Ideally we would want some characters converted to their UTF-8 equivalents. Our environment: Ruby: 1.9.1 Rails 2.3.5 MySql Gem: 2.8.1 This is a serious and urgent problem for us so your answers are very appreciated!

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• read url in binary mode in java

  - by Andrew Zawok

  In java I need to read a binary file from a site and write it to a disk file. This example http://java.sun.com/docs/books/tutorial/networking/urls/readingURL.html could read webpages succesfully, but when I try to read a binary file from my localhost server and write it to a disk file the contents change, corrupting the binary file. Using fc I see that 0x90 is changed to 0x3F and other changes. How do I acess the binary files (read url and write to file) without java or anything else changing ANY characters, like doing any newline conversions or character conversions or anything else, simply reading input url and writing it out as a file.

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• WinForms Application Hangs

  - by Ram

  Hi, I have an application (ABC) that I developed and it as a windows application (.exe). It is by itself quite a big application referring a lot of dll's. However, now there is a requirement that demands that this application(ABC) be a part of an even larger application (XYZ). Hence, I had to change the project type of "ABC" from being a windows application to a class library, and by changing a few lines of code. My problem is that, ever since I started using ABC as part of XYZ, the application started hanging if I dint perform any operation on it for 10 to 15 mins... I do not have any problems while running it as a separate application. Any reasons why this might occur? Any suggestions would be really appreciated... Thanks, Ram

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• Using multilingual and localeurl in django

  - by Dmitry A. Erokhin

  Using dajngo-multilingual and localeurl. Small sample of my main page view: def main(request): #View for http://www.mysite.com/ name = Dog.objects.all()[0].full_name #this is a translated field return render_to_response("home.html", {"name" : name}) Entering http://www.mysite.com/ redirects me to http://www.mysite.com/ru/ and "name" variable gets russian localization. For now it's ok... But... Entering http://www.mysite.com/en/ shows me same russian loclized variable. During my experiments with debuger I've discovered: request.LANGUAGE_CODE is changing properly according to /en/ or /ru/ url suffix (thanx to localeurl) invoking multilingual.languages.set_default_language() makes "name" variable change loclization The question is: should I change language of django-multilingual to request.LANGUAGE_CODE in each of my view myself, or it must be solved automaticly and I've done something wrong?

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• JTable row filters updates

  - by Jeff Storey

  Is there a way to tell a JTable's row filter that it should update itself to display the filtered data? I'm currently using the fireTableDataChanged method in the AbstractTableModel but the underlying data for the table isn't actually changing, so this seems like it might be wasteful. The way my filter works is to check if data in the table is in some other list and only display it if it is in that list. So that other list changed and I need to tell the filter to refresh itself. Is fireTableDataChanged the correct way to do this? thanks, Jeff

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• How "duplicated" Java code is optimized by the JVM JIT compiler?

  - by Renan Vinícius Mozone

  I'm in charge of maintaining a JSP based application, running on IBM WebSphere 6.1 (IBM J9 JVM). All JSP pages have a static include reference and in this include file there is some static Java methods declared. They are included in all JSP pages to offer an "easy access" to those utility static methods. I know that this is a very bad way to work, and I'm working to change this. But, just for curiosity, and to support my effort in changing this, I'm wondering how these "duplicated" static methods are optimized by the JVM JIT compiler. They are optimized separately even having the exact same signature? Does the JVM JIT compiler "sees" that these methods are all identical an provides an "unified" JIT'ed code?

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• How to add handler in dynamic datatemplate

  - by Phillip Ngan

  I am successfully declaring a data template in a code behind as follows: private static DataTemplate CreateTemplate(string sortMemberPath, HorizontalAlignment horzAlignment) { const string xamlFormat = "<DataTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" >" + "<StackPanel > " + " <TextBlock Margin=\"2,0\" VerticalAlignment=\"Center\" HorizontalAlignment=\"_HALIGNMENT_\" " + " Text=\"hello there\"> " + " </TextBlock> " + "</StackPanel>" + "</DataTemplate>"; return (DataTemplate) XamlReader.Load(xamlReturned); } But now I want to add a size changed handler by changing the line: + "<StackPanel > " to + "<StackPanel SizeChanged="SizeChangedHandler" > " I have the method "SizeChangedHandler" declared in the code behind. This results in a xaml parse error when the control attempts to load at runtime. I suspect that it can't find the handler "SizeChangedHandler". How can I specify this handler so that the xaml parser is happy.

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• RichFaces rich:panel header not appearing

  - by Mark Lewis

  Hello I specified this <rich:panel> <f:facet name="header"> Panel #1. Changing Style Synchronously </f:facet> Each component in the RichFaces has a pre-defined set of classes you can manipulate with. If defined, those classes overwrite the ones come from the skin. </rich:panel> from the RichFaces demo, in my JSF page and no header appears, although I've nothing in my css which would interfere. What might be the reason for this? Thanks

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• PySide using Style Sheets to change QtoolBox

  - by efi_ex

  I'm Wondering if somebody knows a better reference than the QT one for style sheets. I try to change the background of the content from a QToolBox but background-color only changes the header of the toolbox and the background of the content it reveals is left in a standard color. I then tried to change the bg of QWidget which worked but left me with problems now at Radiobuttons and Checkboxes, i also think changing QWidget isn't a good solution. The first picture is with Qt standard colors (this is a maya tool) the second when i change QWidget http://i.imgur.com/MNlSedx.png?1 http://i.imgur.com/wuplpmw.png?1

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