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  • About "If.." in Scheme (plt-scheme)

    - by Amit
    I had a pretty simple requirement in my Scheme program to execute more than one statement, in the true condition of a 'if'. . So I write my code, something like this: (if (= 1 1) ((expression1) (expression2)) ; these 2 expressions are to be executed when the condition is true (expression3) ) Obviously, the above doesn't work, since I have unintentionally created a # procedure with # arguments. So, to get my work done, I simply put the above expressions in a new function and call it from there, in place of the expression1, expression2. It works. So, my point here is: is there any other conditional construct which may support my requirement here?

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  • Silverlight using WCF Ria with POCOS gives edit operation error

    - by JD
    Hi, I have converted an Entity framework project to use POCO objects by removing the entity data model and the domain service and meta data classes. My silverlight project works as it is showing a datagrid of Employee objects. I have not added a DataForm and when I modify the "name" property of one of my Employee objects, I get the error: This EntitySet of type 'TestEmployeesApp.Web.Employee' does not support the 'Edit' operation. The error occurs on validatingProperty() on the class Entity on the client side. I checked the metadata on the server side, and all my properties have the attribute Editable(true). I am using Silverlight 3 with VS2008. JD

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  • Enterprise distribution Program for iPhone

    - by Mohammed Sadiq
    Hi all, I would like to implement a application which backs up all the internal datas like sms, mms, videos, audios, documents, call history stored in iPhone. But this seems to be not possible with api docs that the apple has released so far ... I have gone through the pdf of ENterprise distribution program and some of the links related to Enterprise Distribution Program, specifies about the Remote wipe and accessing of internal datas like Calendar, sms, mms ect .... But they didnt mention how to do it programmatically. Does Apple provide any special priviledges like extra api support to access the internal data in their Enterprise Distribution Program?. Is there any difference between Enterprise Distribution Program and Standard Distribution Program in the development point of view? And since in-house distribution does not require Apple approval, shall we use some other method which are not officially mentioned in apple docs, to access the internal stored data .. If so can anyone point out the way to do it? Any help would be greatly appreciated awaiting for your response Best regards, Mohammed Sadiq ....

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  • Writing an Iron Python debugger

    - by Kragen
    As a learning exercise I'm writing myself a simple extension / plugin / macro framework using IronPython - I've gotten the basics working but I'd like to add some basic debugging support to make my script editor easier to work with. I've been hunting around on the internet a bit and I've found a couple of good resources on writing managed debuggers (including Mike Stall's excellent .Net Debugging blog and the MSDN documentaiton on the CLR Debugging API) - I understand that IronPython is essentially IL however apart from that I'm a tad lost on how to get started, in particular: Are there any significant differences between debugging a dynamic language (such as IronPython) to a static one (such as C#)? Do I need to execute my script in a special way to get IronPython to output suitable debugging information? Is debugging a script running inside the current process going to cause deadlocks, or does IronPython execute my script in a child process? Am I better off looking into how to produce a simple C# debugger first to get the general idea? (I'm not interested in the GUI aspect of making a debugger for now - I've already got a pretty good idea of how this might work)

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  • RadGrid cannot pass sortExpression to ObjectDataSourceControl

    - by Jeff
    I have a Telerik RadGrid that bound to a datasource object. They are configured to support custom paging, sorting. For paging, only the data of a page is retrieved from the database. Before sorting, it works fine. The select method of the datasource is like public List<xxx> Select(string sortExpression, int maximumRows, int startRowIndex) {} Before sorting the sortExpression is empty, which is expected. But after use click sort, in the OnSortCommand event handler of Radgrid, the SortExpression is correct, indicating RadGrid has caputre user's sorting correctly. protected void OnSort(object source, GridSortCommandEventArgs e) { Console.WriteLine(e.SortExpression); // correct } But what is strange is that the RadGrid does not pass parameter to DataSource correctly this time. sortExpression is still empty, maximumRows became int.Max, and startRowIndex is 0. The the sorting in still render correctly, but grid ask datasource to get all data and do the sorting locally. Is this bug of RadGrid or my configuration is wrong?

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  • Lotus Notes rich text field to RTF File - VB

    - by user236105
    Here is my problem, I am doing a data migration from Lotus notes to another type of software that does not support Rich Text Fields. I am trying to write a VB 2005 program that will take any rich text fields that are found and place them into an RTF file - which will be uploaded as an attachment in the new software. I cannot get the program to take the rich text formating or objects to the RTF file, only the plain text. I have tried everything under the sun using the COM library to get these objects out to no avail. Any ideas or suggestions? Thank you in advance Bryan

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  • Qt, unit testing and mock objects.

    - by Eye of Hell
    Hello. Qt framework has internal support for testing via QtTest package. Unfortunately, i didn't find any facilities in it that can assist in creating mock objects. Qt signals and slots offers a natural way to create a unit-testing friendly units with input (slots) and output (signals). But is it any easy way to test that calling specified slot in object will result in emitting correct signals with correct arguments? Of course i can manually create a mock objects and connect them to objects being tested, but it's a lot of code. Maybe it's some techniques exists that allows to somehow automate mock objects creation while unit-testing Qt-based applications?

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  • Invoke or BeginInvoke cannot be called on a control until the window handle has been created.

    - by blade3
    Hi I am trying to install SQL Server 2008 Developer Edition x64 on a Windows Server 2008 VM. I run the installer for a standalone installation and this works fine for the setup support rules bit. That passes ok but then I get this error: TITLE: SQL Server Setup failure. SQL Server Setup has encountered the following error: Invoke or BeginInvoke cannot be called on a control until the window handle has been created.. BUTTONS: OK How can I resolve this? I am getting 2008 R2 CTP but this is just a CTP. My download is from DreamSpark. Thanks

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  • How to consume REST in C# including PUT, POST and DELETE?

    - by Earlz
    Hello, I have a REST webservice that I need to consume in C#. I need support for more than just GET requests though. I need everything that is done by REST including GET, PUT, POST, and DELETE. What is the best way of interfacing with this? I do not see anything for HTTPRequest to be able to do POST or anything other than GET unless you construct your own headers(which I prefer not to) Is there some easy and lightweight way to fully consume REST webservices in C#?

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  • Hostgator SSH returns Too many authentication failures for username

    - by Tri Nguyen
    I was trying to ssh into my Hostgator shared hosting account following this guide: http://support.hostgator.com/articles/getting-started/how-do-i-get-and-use-ssh-access However, it returns this error: Received disconnect from 96.125.167.124: 2: Too many authentication failures for tridn I tried to search around for a solution, and found this: http://www.ipreferjim.com/2011/07/hostgator-ssh-warns-too-many-authentication-failures/ I tried doing what he suggested, but encountered another error: jailshell: .ssh/authorized_keys: No such file or directory So I ssh into my server using the PubkeyAuthentication=n flag, and create a directory called .ssh and a file called authorized_keys. I then redid what was suggested in the article, which is this: cat ~/.ssh/hostgator.pub | ssh -p 2222 -o PubkeyAuthentication=no [email protected] 'cat >> .ssh/authorized_keys' (note: my ssh key is called hostgator.pub. it's dsa I verified that the authorized_keys now has the content of this key. However, it still get the same error as before: eceived disconnect from 96.125.167.124: 2: Too many authentication failures for tridn Anybody knows how I should proceed next?

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  • Variables versus constants versus associative arrays in PHP

    - by susmits
    I'm working on a small project, and need to implement internationalization support somehow. I am thinking along the lines of using constants to define a lot of symbols for text in one file, which could be included subsequently. However, I'm not sure if using variables is faster, or if I can get away with using associative arrays without too much of a performance hit. What's better for defining constant values in PHP, performance-wise -- constants defined using define("FOO", "..."), or simple variables like $foo = "...", or associative arrays like $symbols["FOO"]?

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  • WCF performance improvements

    - by Burt
    I am developing a WPF application that talks to a server via WCF services over the internet. After profiling the application I noticed a lot of time is being taking up by creating the appropriate WCF client proxy and making the call to the server. The code on the server is optimised and doesn't take any time to run yet I am still seeing a 1.5 second delay from when a service is invloked to it returning to the client. A few points to give a bit of background: I am using the ASP.Net membership for security I will eventually hook into the same server side code through a website I would eventually like to have offline support in the application I really need to nail the performance early though as if the app is taking a couple of seconds to come back it is too long for what I am trying to do. Can anyone suggest performance tips that will help me please?

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  • Crystal report using Linq-to-sql

    - by DATT OZA
    Hello, I am bit confusing in generating crystal report from linq-to-sql object in my WpfApplication. crystalreport1 rpt = new crystalreport1(); datacontextclass1 db = new datacontextclass1(); var q = (from records in db.emp select records).toList(); rpt.setDataSource(q); crystalviewer.reportsource(rpt); I have done above steps... but its prompts error NotSupportedException Was Unhandled Dataset not support system.nullable< please help... thanx in advance..

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  • Check for Block Ads/Scripts (Browser Addons, Compatibility)

    - by acidzombie24
    I'm conflicted. you guys decide if this should migrate to SU or not. I would like to test my site against popular browser ad ons. ATM i have tested against noscript and adblock plus for firefox. What other popular ad ons should i check compatibility with? By compatibility i mean to work as intent on browsers i support (opera, firefox, chrome, IE 7/8) which include ads. NoScript broke my site and for adblock plus i ask once per week to consider allowing ads. When i see IE6 i notify the user the site is known to be unusable with that browser (The site is script heavy by nature and i wouldnt want to accidentally serve ads to infect users of IE6 with a virus).

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  • Product table, many kinds of product, each product has many parameters

    - by StoneHeart
    Hi, i'm have not much experience in table design. My goal is a product table(s), it must design to fix some requirement below: Support many kind of products (TV, Phone, PC, ...). Each kind of product has different set of parameters like: Phone will have Color, Size, Weight, OS... PC will have CPU, HDD, RAM... Set of parameters must be dynamic. You can add or edit any parameter you like. I don't want make a table for each kind of product. So I need help to find a correct solution. Thanks.

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  • Aaron Hillegass Chapter 18 Challenge Question

    - by jasonbogd
    I am working through Aaron Hillegass' Cocoa Programming for Mac OS X and am doing the challenge for Chapter 18. Basically, the challenge is to write an app that can draw ovals using your mouse, and then additionally, add saving/loading and undo support. I'm trying to think of a good class design for this app that follows MVC. Here's what I had in mind: Have a NSView-subclass that represents an oval (say JBOval) that I can use to easily draw an oval. Have a main view (JBDrawingView) that holds JBOvals and draws them. The thing is that I wasn't sure how to add archiving. Should I archive each JBOval? I think this would work, but archiving an NSView doesn't seem very efficient. Any ideas on a better class design? Thanks.

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  • Java library for HTML analysis

    - by Raj
    Hi, (I've seen similar questions, but I think none of them cater to my specific needs, hence...) I would like to know if there is a Java library for analysis of real-world (read: incomplete, ill-formed) HTML. By analysis, I mean things like: figuring out the most prominent color in an HTML chunk changing that color to some other color (hence, has to support modification of the HTML as well) pruning out unwanted tags fixing up the HTML to result in a well formed HTML snippet Parts of the last two are done by libraries such as Jericho, and jTidy. 'Plugins' on top of these would be great. Thanks in advance!

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  • Logging strategy vs. performance

    - by vtortola
    Hi, I'm developing a web application that has to support lots of simultaneous requests, and I'd like to keep it fast enough. I have now to implement a logging strategy, I'm gonna use log4net, but ... what and how should I log? I mean: How logging impacts in performance? is it possible/recomendable logging using async calls? Is better use a text file or a database? Is it possible to do it conditional? for example, default log to the database, and if it fails, the switch to a text file. What about multithreading? should I care about synchronization when I use log4net? or it's thread safe out of the box? In the requirements appear that the application should cache a couple of things per request, and I'm afraid of the performance impact of that. Cheers.

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  • Implement a HierarchicalDataBoundControl for ASP.NET

    - by Breadtruck
    I want to implement a Hierarchical data bound control for ASP.NET. I used Implementing IHierarchy Support Into Your Custom Collection as a basis to create my hierarchical collection. I also created a HierarchicalDataSourceControl for the collection. Everything works: I can bind it to an ASP.NET TreeView and it renders the data correctly. However, I'm stuck on the HierarchicalDataBoundControl. I found examples, but I am still too new at c# / .Net to understand them. I don't quite understand how to implement the examples: Rendering a databound UL menu nor HierarchicalDataBoundControl Class Does anyone have any tips, or better examples of implementing a control like this?

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  • Spring 3 JSON with MVC

    - by stevedbrown
    Is there a way to build Spring Web calls that consume and produce application/json formatted requests and responses respectively? Maybe this isn't Spring MVC, I'm not sure. I'm looking for Spring libraries that behave in a similar fashion to Jersey/JSON. The best case would be if there was an annotation that I could add to the Controller classes that would turn them into JSON service calls. A tutorial showing how to build Spring Web Services with JSON would be great. EDIT: I'm looking for an annotation based approach (similar to Jersey). EDIT2: Like Jersey, I am looking for REST support (POST,GET,DELETE,PUT). EDIT3: Most preferably, this will be the pom.xml entries and some information on using the spring-js with jackson Spring native version of things.

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  • SQL Server Reporting Services - Fast TimeDataRetrieval - Long TimeProcessing

    - by user197529
    An application that I support has recently begun experiencing extended periods of time required to execute a report in SQL Server Reporting Services. The reports that are being executed are not terribly complex. There are multiple stored procedures (between 5 and 8) which return anywhere from a handful to 8000 records total. Reports are generally from 2 to 100 pages. One can argue (and I have) the benefit of a 100 page report, but the client is footing the bill. At any rate, the problem is that even the reports with 500 records (11 pages) being returned takes 5 minutes to return to the browser. In the execution log the TimeDataRetrieval is 60 seconds, but the TimeProcessing is 235 seconds. It seems bizarre to me that my query runs so quickly, but it takes Reporting Services so long to process the data. Any suggestions are greatly appreciated. Kind Regards, Bernie

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  • installshield: Windir returns c:\documents & settings\fcuser\windows instead of c:\windows

    - by Sakhawat Ali
    we have a setup developed in installshield vr 6.3. it is a self extractable single setup. it work fine in most on most of the Windows version but on Windows server 2003 64bit in Execution mode when doing RD it return user windows directory against WINDIR i.e. c:\documents & settings\fcuser\windows instead of C:\Windows. According to http://support.microsoft.com/?kbid=186499 it should work fine when i change the compatibility bit of Setup but it didn't. i tried changing compatibility bit of these key too (INSTRUN, SETUP and SETUP1 ) but it didn't work either. but when i when i run the setup within the self extractable by extracting it work fine.

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  • High volume SVM (machine learning) system

    - by flyingcrab
    I working on a possible machine learning project that would be expected to do high speed computations for machine learning using SVM (support vector machines) and possibly some ANN. I'm resonably comfortable working on matlab with these, but primarly in small datasets, just for experimentation. I'm wondering if this matlab based approach will scale? or should i be looking into something else? C++ / gpu based computing? java wrapping of the matlab code and pushing it onto app engine? Incidentally, there seems to be a lot fo literature on GPUs, but not much on how useful they are on machine learning applications using matlab, & the cheapest CUDA enlabled GPU money can buy? is it even worth the trouble?

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  • NETWORK_ERROR: XMLHttpRequest Exception 101

    - by pawan Mangal
    I am getting this Error NETWORK_ERROR: XMLHttpRequest Exception 101 when trying to get XML content from one site. Here is my code var xmlhttp; if(window.XMLHttpRequest) { xmlhttp = new XMLHttpRequest(); } if (xmlhttp==null) { alert ("Your browser does not support XMLHTTP!"); return; } xmlhttp.onReadyStateChange=function() { if(xmlhttp.readyState==4) { var value =xmlhttp.responseXML; alert(value); } } xmlhttp.open("GET",url,false); xmlhttp.send(); //alert(xmlhttp.responseXML); } xmlhttp.open("GET",url,false); xmlhttp.send(null); Does any one have a solution?

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  • Put DrawingGroup on a Canvas?

    - by stefan.at.wpf
    Hello, I have a DrawingGroup and I want to put it on a Canvas, but because DrawingGroup is no UIElement, this is not possible. Whats the best way to do this? And from which class could I derive, so that I could do something like canvas1.Children.Add(new myDrawingGroup()); (Meaning I want to add my DrawingGroup as one element on the canvas, instead of several single Drawings / Geometries. I also need hit testing and databinding support.) Thank you very much for any hint!

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