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• How do I visualize a complex graph in .Net?

  - by Ivan

  I need to visualize a graph (technically being a set of Entity Framework objects, but I can translate it to another representation if needed) of this kind. I don't know how to name it (by the way, if you know - I'll appreciate if you tell me). It would be ideal for graph elements to be clickable (so that when user clicks on a block, I can handle an event with the element id specified) but I can survive even without any interactivity. Are there any components available good for this task? If no, what should I look for to help me to develop an algorithm for drawing such a graph with visually-comfortable layout?

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• How can I compare Core Data models?

  - by Don

  I noticed while doing system testing that a feature of our app had been removed. It looks like at some point, an older version of a file was checked into SVN that was missing a property. This specific file was generated from the Core Data model, and sure enough, the latest version of the model in SVN is missing the same attribute. I need to find out if any other attributes are missing, or if anything else in the model changed. However, the elements file in the .xcodedatamodel folder appears to binary and I can't compare the revisions. Is there a way to find the differences between two Core Data models in SVN? Barring that, what would be the best way to accomplish this task?

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• I am designing a bus timetable using SQL. Each bus route has multiple stops, do I need a different t

  - by Henry

  I am trying to come up with the most efficient database as possible. My bus routes all have about 10 stops. The bus starts at number one until it reaches the 10th stop, then it comes back again. This cycle happens 3 times a day. I am really stuck as to how I can efficiently generate the times for the buses and where I should store the stops. If I put all the stops in one field and the times in another, the database won't be very dynamic. If I store all the stops one by one in a column and then the times in another column, there will be a lot of repeating happening further down as one stop has multiple times. Maybe I am missing something, I've only just started learning SQL and this is a task we have been set. Thanks in advance.

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• why jquery detach element will cause a form to submit?

  - by jiewmeng

  i wonder why in the following example, trying to detach an element (li) causes the form containing it to submit html <form id="frmToDo" name="frmToDo"> <p id="lineInput"> ... <input type="submit" id="btnSubmit" value="Add" /> </p> <ul id="todolist"> <!-- added in ajax --> </ul> </form> JS $("#frmToDo").submit(function() { // this runs after: $("#todolist").detach(...) }); $("#todolist").delegate("li[id^=task-] button", "click", function() { $("#todolist").detach($($(this).parent()).id()); return false; });

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• How to get notification of workflow errors?

  - by Greg McGuffey

  I am having issues were a workflow is stalled because there is an issue with sending an email (send email activity). Typically, this is simply solved by resuming the workflow. I'm wondering if there any way to react to a workflow error, so the user knows they need to go in and resume the workflow. I'm also wondering about this relative to a workflow that is attempting to assign a task to a user who no longer exists in the CRM or one that has an invalid email address, which I'm assuming would cause errors in workflows as well. Any other suggestions related to this sort if issue would be welcome. Thanks!

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• Python comparing string against several regular expressions

  - by maerics

  I'm pretty experienced with Perl and Ruby but new to Python so I'm hoping someone can show me the Pythonic way to accomplish the following task. I want to compare several lines against multiple regular expressions and retrieve the matching group. In Ruby it would be something like this: STDIN.each_line do |line| case line when /^A:(.*?)$/ then puts "FOO: #{$1}" when /^B:(.*?)$/ then puts "BAR: #{$1}" # when ... else puts "NO MATCH: #{line}" end end My attempts in Python are turning out pretty ugly because the matching group is returned from a call to match/search on a regular expression and Python has no assignment in conditionals or switch statements. What's the Pythonic way to do (or think!) about this problem?

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• How to programmatically launch a chromecast app from command line

  - by pushmatrix

  I want to launch a Chromecast app but NOT using the chrome extension or iOS or Android. Doing this from command line. I noticed that you can send a POST to your chromecast, and it will launch an app. For example if I do curl -H “Content-Type: application/json” http://CHROMECAST_IP:8008/apps/YouTube -X POST -d ‘v=oHg5SJYRHA0' Then it will start up youtube. But for some reason I can't do this with custom apps (in dev mode). I thought I'd be able to send a POST to http://CHROMECAST_IP:8008/apps/MY_REGISTERED_APP_ID, but no luck. I just get a 404 response. Hmmm... My app is just a simple webpage (it is not streamed media). I want to run a little headless server that starts my chromecast app everyday via a CRON task. Any help is greatly appreciated! Thanks :)

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• Make a usable Join relationship with LINQ on top of a database CSV design error

  - by jdk

  I'm looking for a way to fix and/or abstract away a comma-separated values (CSV) list in a database field in order to reconstruct a usable relationship such that I can properly join the two tables below and query them using LINQ and its Join method. Following is a sample showing the Person table and CsvArticleIds field having a CSV value to represent a one-to-many association with Article records. TABLE [dbo].[Person] Id Name CsvArticleIds -- ---------- -------- 1 Joe "15,22" 5 Ed "22" 10 Arnie "8,15,22" ^^^(Of course a link table should have been created; nonetheless the relationship with articles is trapped inside that list of CSV values.) TABLE [dbo].[Article] Id Title -- ---------- 8 Beginning C# 15 A Historic look at Programming in the 90s 22 Gardening in January Additional Info the fix can be at any level: C#.NET or SQL Server something easy because I will be repeating the solution for many other CSV values in other tables. Elegant is nice too. not looking for efficiency because this is part of a one-time data migration task and can take as long as it wants to run.

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• What to read as a good intro and quickstart to aspect-oriented programming and metaprogramming?

  - by Ivan

  As I've found myself repeating myself a lot, writing very similar queries and classes for different entities (despite of doing strong object and relational normalisation), etc, I've came to an Idea that I could and should automate the most of this and write an engine which will compile simple declarative models I specify into all the code limiting my job to describe the task and and finally just customise the result as needed. As far as I know this is about metaprogramming and aspect-oriented programming. How do I get acquainted with modern tools available quickly so that I don't invent one more bicycle developing my own?

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• Jquery help for current time indication within a range

  - by Appster

  I'm looking for a simple light-weight jquery plugin that'll help me show something like this in my website: Essentially, this is like a timeline. I know the start and end dates (in that, they don't change) and the position of today's date just gives an indication of how far along I am into a task I took up on Jun 1, 2012. That's all I need it for - a better visual indication of my current status. I've found a lot of jquery timeline plugins but they are too complex for what I'm trying to do. Any ideas or suggestions? Thanks in advance.

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• Seam-gen isn't working properly.. log4j acuses an error

  - by rgoytacaz

  Hello Seam Users, I'm having a couple problems with my Seam start up. I did the ./seam generate to reverse my current postgres db, which contains 4 tables, first I though everything was okay, just a warning message, but when I imported the project into eclipse, I saw that none of my packages had any class. This is the error that seam generate, got me. [hibernate] Executing Hibernate Tool with a JDBC Configuration (for reverse engineering) [hibernate] 1. task: hbm2java (Generates a set of .java files) [hibernate] log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment). [hibernate] log4j:WARN Please initialize the log4j system properly. [javaformatter] Java formatting of 0 files completed. Skipped 0 file(s). Any ideas? The seam-gen was supposed to generate some entity classes, but its not. I suppose that error is causing the mis-behavior. Regards

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• Running a Java process in Windows even after the user is logged out

  - by Mani

  I have a batch file that starts a Java process in a Windows 2003 server. As per the security policy, the users of that machine are logged off forcefully, if the user is inactive for a certain period of time. The problem is that when the user is logged out, the process also dies. I scheduled a new task (Control Panel - Scheduled Tasks) and selected the option of 'When my computer starts' and gave the user account details there. But it doesn't seem to have any effect, the user is still logged out and the process dies. Is a reboot necessary to make this change effective? And after the reboot, will I achieve what I'm expecting (keeping the process alive)? Alternatively, will running this process as a Windows Service solve the problem? If so, can you please let me know how I can make a Java program or a batch file to run as a Windows Service? I would prefer not to use any other third party tools or libraries. Thanks

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• Visual Studio Publish using Web Deploy gives SSL Exception?

  - by user1267778

  Im trying to use Web Deploy with arvixe hosting. I enabled Publishing with the host but I get SSL exception when I hit publish. Is anybody familiar with the following exception: Error 59 Web deployment task failed.(Could not complete the request to remote agent URL 'https://yew.arvixe.com:8172/msdeploy.axd?site=mywebsite.com'.) Could not complete the request to remote agent URL 'https://yew.arvixe.com:8172/msdeploy.axd?site=mywebsite.com'. The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. The remote certificate is invalid according to the validation procedure. 0 0 myapplication_MVC4 Thanks

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• What is better for a student programming in C++ to learn for writing GUI: C# vs QT?

  - by flashnik

  I'm a teacher(instructor) of CS in the university. The course is based on Cormen and Knuth and students program algorithms in C++. But sometimes it is good to show how an algorithm works or just a result of task through GUI. Also in my opinion it's very imporant to be able to write full programs. They will have courses concerning GUI but a three years, later, in fact, before graduatuion. I think that they should be able to write simple GUI applications earlier. So I want to teach them it. How do you think, what is more useful for them to learn: programming GUI with QT or writing GUI in C# and calling unmanaged C++ library?

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• grabing data from url

  - by Syom

  i have a task - i must grab some data from the URL. the link is http://cba.am. the data, i want to take, are in the some table, and i have the only one identifier, to reach my wanted data, it's the word "usd", which writes in that table(html)! i've written the following script, and it works! but i never heard how more experienced programers do such things, so i want to hear your comments. here is script <?php $str = file_get_contents("http://cba.am/"); $key_usd = "USD"; $sourse_usd_1 = explode($key_usd,$str); $usd1 = $sourse_usd_1[2]; $sourse_usd_2=explode(">",$usd1); $usd2 = $sourse_usd_2[4]; $sourse_usd_3=explode("<",$usd2); $usd = $sourse_usd_3[0]; ?> sorry for poor english:)

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• Ant Tokenizer: Selecting an individual Token

  - by John Oxley

  I have the following ant task: <loadfile property="proj.version" srcfile="build.py"> <filterchain> <striplinecomments> <comment value="#"/> </striplinecomments> <linecontains> <contains value="Version" /> </linecontains> </filterchain> </loadfile> <echo message="${proj.version}" /> And the output is [echo] config ["Version"] = "v1.0.10-r4.2" How do I then use a tokenizer to get only v1.0.10-r4.2, the equivalent of | cut -d'"' -f4

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• Is Work Stealing always the most appropriate user-level thread scheduling algorithm?

  - by Il-Bhima

  I've been investigating different scheduling algorithms for a thread pool I am implementing. Due to the nature of the problem I am solving I can assume that the tasks being run in parallel are independent and do not spawn any new tasks. The tasks can be of varying sizes. I went immediately for the most popular scheduling algorithm "work stealing" using lock-free deques for the local job queues, and I am relatively happy with this approach. However I'm wondering whether there are any common cases where work-stealing is not the best approach. For this particular problem I have a good estimate of the size of each individual task. Work-stealing does not make use of this information and I'm wondering if there is any scheduler which will give better load-balancing than work-stealing with this information (obviously with the same efficiency). NB. This question ties up with a previous question.

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• What does it mean to do/determine something "programmatically"?

  - by Chris Lutz

  Programmatically. (alt. programmically) I've never used it, but I see it in questions a lot, i.e. "How to programmatically determine [insert task here]". Firefox immediately tells me that neither of these two words are real (at least, it doesn't recognize them). I've also never seen them used anywhere but here. 1) What does it mean to do/determine something "programmatically"? 2) Why do so many people ask how to do/determine something "programmatically"? Isn't it assumed that, if you're asking how to do something on a programming help board, you're asking how to do it "programmatically"? 3) Why is it that I've never seen the word "programmatically" anywhere else?

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• How can I make sure the Sphinx daemon runs?

  - by Ethan

  I'm working on setting up a production server using CentOS 5.3, Apache, and Phusion Passenger (mod_rails). I have an app that uses the Sphinx search engine and the Thinking Sphinx gem. According to the Thinking Sphinx docs... If you actually want to search against the indexed data, then you’ll need Sphinx’s searchd daemon to be running. This can be controlled using the following tasks: rake thinking_sphinx:start rake ts:start rake thinking_sphinx:stop rake ts:stop What would be the best way to ensure that this takes place in production? I can deploy my app, then manually run rake thinking_sphinx:start, but I like to set things up so that if I have to bounce the server, everything will come back up. Should I put a call to that Rake task in an initializer? Or something in rc.local?

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• (Visual) C++ project dependency analysis

  - by polyglot

  I have a few large projects I am working on in my new place of work, which have a complicated set of statically linked library dependencies between them. The libs number around 40-50 and it's really hard to determine what the structure was initially meant to be, there isn't clear documentation on the full dependency map. What tools would anyone recommend to extract such data? Presumably, in the simplest manner, if did the following: define the set of paths which correspond to library units set all .cpp/.h files within those to belong to those compilation units capture the 1st order #include dependency tree One would have enough information to compose a map - refactor - and recompose the map, until one has created some order. I note that http://www.ndepend.com have something nice but that's exclusively .NET unfortunately. I read something about Doxygen being able accomplish some static dependency analysis with configuration; has anyone ever pressed it into service to accomplish such a task?

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• Does the number of busy worker threads in the CLR ThreadPool affect performance of I/O threads?

  - by andrej351

  We have a Windows Service which hosts a number of WCF services and, in an unrelated part of the app, makes extensive use of the TPL Task class to asynchronously do relatively short bits of work. It is my understanding that WCF uses managed I/O threads from the ThreadPool to execute requests. I noticed that after deploying a feature which significantly raised the applications use of Tasks, and as such the use of ThreadPool worker threads as well, performance of a couple of web services has become very slow. We're talking minutes instead of less than a second. The number of Tasks actually trying to run at any one time can range between 20 and 1000, which makes me think that any new (last in) work needing some CPU time could be forced to wait for quite some time. Does the (in my case extremely large) number of busy ThreadPool worker threads affect the ThreadPool's managed I/O threads? Or could these two be connected in any way? Thanks!

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• C# program for finding how many numbers are devidable by 5 in give range

  - by user1639735

  My task is: Write a program that reads two positive integer numbers and prints how many numbers p exist between them such that the reminder of the division by 5 is 0 (inclusive). Example: p(17,25) = 2. Console.Write("Enter min: "); int min = int.Parse(Console.ReadLine()); Console.Write("Enter max: "); int max = int.Parse(Console.ReadLine()); Console.WriteLine("The numbers devidable by 5 without remainder from {0} to {1} are: ",min,max); for (int i = min; i <= max; i++) { if (i % 5 == 0) { Console.WriteLine(i); } } This prints out the numbers that are devidable by 5 in the range...How do I count how many are there and print the count in the console? Thanks.

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• How does one advance in programming?

  - by Joe Barr

  I really have the felling as if I'm stuck in my own craft. I've been developing and learning for a while now and keep having the feeling that I should advance more, or even be more knowledgeable. I've started projects I didn't finish because I thought I lacked the knowledge and the skill to make that feature work just right, or to make that code magically appear on my screen. I've read books I didn't finish, thinking I wasn't advanced enough for the subjects they covered. I've been around long enough to know that everything comes with experience, hard work and dedication. Having said this, I just want to be able to work without getting stuck on a particular problem that involves my cluelessness of a language or a tool feature. My question to you would be, how does one advance in programming? What are the secrets (if any) to advance to the point of fluency in a particular language or a task. Thank you!

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• How can I request local pages in the background of an ASP.NET MVC app?

  - by flipdoubt

  My ASP.NET MVC app needs to run a set of tasks at startup and in the background at a regular interval. I have implemented each task as a controller action and listed the app-relative path to the action in the database. I implemented a TaskRunner process that gets the urls from the database and requests each one at a regular interval using WebRequest.Create, but this throws a UriFormatException. I cannot use this answer or any code that plucks values from HttpContext.Current.Request without getting an HttpException with the message "Request is not available in this context". The Request object is not available because my code uses System.Threading.Timer to do background processing, as recommended here. Here are my questions: Is there really no way to make local web requests within an ASP.NET web app? Is there really no way to dynamically ascertain the root path to the web app even using static dependencies in ASP.NET? I was trying to avoid storing the app's root path in the database (as FogBugz does with its "Maintenance Path"), but is this best option?

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• How to pass the image from oneview to another view in iphone?

  - by Warrior

  I am new to iphone development.I want to display the image selected in a seperateview.I have used UIImagePickerController to pick the image from device library.On clicking the image i have to navigate to another view and display the image.How can i send the image o another view.I have used delegate methods for accessing string in other views.Is there any possibility to send the image via delegate methods. - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img1 editingInfo:(NSDictionary *)editInfo { [[picker parentViewController] dismissModalViewControllerAnimated:YES]; EmailPictureViewController *email = [[EmailPictureViewController alloc] initWithNibName:@"EmailPictureViewController" bundle:nil]; [self.navigationController pushViewController:email animated:YES]; } From the above code i have to set delegates for img1 which is of type UIImage. Is there any other way to achieve my task.Please help me out.Thanks.

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