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  • Lack of IsNumeric function in C#

    - by Michael Kniskern
    One thing that has bothered me about C# since its release was the lack of a generic IsNumeric function. I know it is difficult to generate a one-stop solution to detrmine if a value is numeric. I have used the following solution in the past, but it is not the best practice because I am generating an exception to determine if the value is IsNumeric: public bool IsNumeric(string input) { try { int.Parse(input); return true; } catch { return false; } } Is this still the best way to approach this problem or is there a more efficient way to determine if a value is numeric in C#?

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  • Android:Android SDK and AVD Manager doesn't launch after did SDK upgrade?

    - by user187532
    Hi folks, I have Android development eclipse setup on Mac OS X. I recently did Android SDK upgrade from 1.5 to available versions such as 1.6, 2.0.1 and 2.1 and docs. After did upgrade, automatically restarted my Macbook and installed all new versions. After this, when i try to launch "Windows-Android SDK and AVD Manager", it doesn't launch at all. What might be the reason? Does anyone has the solution? The reason why i'm trying to launch Android SDK and AVD Manager is, i need to add new Android virtual device(avd) target for 2.0.1 and 2.1 versions, for that i'm trying to launch Android SDK and AVD Manager. Thank you in advance for your suggestions.

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  • Problem with MongoDB Ruby Driver

    - by Paul
    I'm on Ubuntu, and I've done install gem mongo which reported Successfully installed bson-1.0 Successfully installed mongo-1.0 2 gems installed I've started mongod Now I cd to the mongo gem directory and try > ruby examples/simple.rb and I get the error ./examples/../lib/mongo.rb:31:in `require': no such file to load -- bson (LoadError) from ./examples/../lib/mongo.rb:31 from examples/simple.rb:3:in `require' from examples/simple.rb:3 which I can't make sense of, since the bson gem is installed > gem list *** LOCAL GEMS *** bson (1.0) bson_ext (1.0) mongo (1.0) rack (1.1.0) sinatra (1.0) Any suggestions what's up here?

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  • Replacing backslash with another symbol in PHP

    - by Skyfe
    Hi there, Been struggling with replacing a backslash by another symbol such as '.-.' just to indicate the position of backslashes as I could not send a string such as 'C\xampp\etc.' through url as GET variable so I thought I'd first replace the backslashes in that string by another symbol, then send through url, and then replace them back to backslashes in the PHP file that handles it. Though would there be a better way to send such strings through url? Because when I try a script such as: $tmp_name = preg_replace("\", ".-.", $_FILES['uploadfile']['tmp_name']); It turns out into a php error as \ is also used as delimiter.. Could anyone help me out on this? Thanks in advanced! Btw, if I'd be able to send a full array through url, this whole problem would be solved, but I don't think it's possible?

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  • Adding a custom control to a page, then adding multiple custom children into that one, null user con

    - by Rickjaah
    Hello all, While nerding my way through the day again. I came across a problem concerning adding children to an already add child control. I can add the controls, but when trying to use the controls in the added control, they all return null. This is the method: protected override CreateChildControls(EventArgs e) { UserControl uControl = LoadControl("~/controls/TwoColumn.ascx"); PlaceHolder holder = uControl.Controls.FindControl(phrContentMiddle) as PlaceHolder; holder.Controls.Add(LoadControl("~/controls/ImageShowControl"); } When i try to call any type of button/UserControl inside the ImageShowControl.... All return null. Is this something in the Page LifeCycle? If so, what is the way to go to realize this?

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  • Piping to findstr's input, dos prompt

    - by Gauthier
    I have a text file with a list of macro names (one per line). My final goal is to get a print of how many times the macro's name appears in the files of the current directory. The macro's names are in C:\temp\macros.txt. type C:\temp\macros.txt in the dos prompt prints the list alright. Now I want to pipe that output to the standard input of findstr. type C:\temp\macros.txt | findstr *.ss (ss is the file type where I am looking for the macro names). This does not seem to work, I get no result (very fast, it does not seem to try at all). findstr <the first row of the macro list> *.ss does work. I also tried findstr *.ss < c:\temp\macros.txt with no success.

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  • Generate SQL Server Express database from Entity Framework 4 model

    - by Cranialsurge
    I am able to auto-generate a SQL Server CE 4.0 *.sdf file using code-first generation as explained by Scott Guthrie here. The connection string for the same is as follows: <add name="NerdDinners" providerName="System.Data.SqlServerCe.4.0" connectionString="data source=|DataDirectory|NerdDinner.sdf"/> However if I try to generate an mdf instead using the following connection string, it fails to do so with the following error - "The provider did not return a ProviderManifestToken string.". <add name="NerdDinners" providerName="System.Data.SqlClient" connectionString="data source=|DataDirectory|NerdDinner.mdf"/> Even directly hooking into a SQLEXPRESS instance using the following connection string fails <add name="NerdDinners" providerName="System.Data.SqlClient" connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=NerdDinner;Integrated Security=True"/> Does EF 4 only support SQL CE 4.0 for database creation from a model for now or am I doing something wrong here?

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  • Aging Data Structure in C#

    - by thelsdj
    I want a data structure that will allow querying how many items in last X minutes. An item may just be a simple identifier or a more complex data structure, preferably the timestamp of the item will be in the item, rather than stored outside (as a hash or similar, wouldn't want to have problems with multiple items having same timestamp). So far it seems that with LINQ I could easily filter items with timestamp greater than a given time and aggregate a count. Though I'm hesitant to try to work .NET 3.5 specific stuff into my production environment yet. Are there any other suggestions for a similar data structure? The other part that I'm interested in is aging old data out, If I'm only going to be asking for counts of items less than 6 hours ago I would like anything older than that to be removed from my data structure because this may be a long-running program.

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  • UITextView on iPad INCREDIBLY Slow

    - by Sj
    I have an NSMutableArray of custom views (that are pretty much 1 UITextView and 1 UILabel with a custom back ground image), these are created as they are need (I start with 2 (though the first one is only 2 UITextFields and the other is normal) of these). Now my issue here seems to be this: as soon as I try to edit any UITextView past the one in the 2nd view, it starts to run incredibly slow, not the app, just the textview. For example, as I type, the little blinky guy lags behind the text and when I click to copy/paste/cut/etc you can see the little balloon fly in from the upper left corner every time. I have run the static analyzer for leaks and come up with nothing and run it alongside some other the testing software in XCode and it does not appear to have any reason for this. Any help would be greatly appreciated.

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  • Techniques to avoid DeadlineExceededException in GAE/J?

    - by Tahir Akram
    I am developing an Twitter4J web application in Google App Engine/Java. I need to show two lists. One is Twitter friends and other is followers. With photo and screen name. It is working fine for people who have 20-30 followers and friends. But it gave me DeadlineExceededException when I try a user who has 150+ followers and friends. GAE throws this exception if web request take time more than 30 seconds. So what techniques I can adopt to avoid this exception. Should I generate two AJAX calls for each of my list. After page loads. So that every call will have its own 30 secs limit? Or what else you think? I am gone make it. Please help.

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  • django username in url, instead of id

    - by dana
    Hello, in a mini virtual community, i have a profile_view function, so that i can view the profile of any registered user. The profile view function has as a parameter the id of the user wich the profile belongs to, so that when i want to access the profile of user 2 for example, i call it like that: http://127.0.0.1:8000/accounts/profile_view/2/ My problem is that i would like to have the username in the url, and NOT the id. I try to modify my code as follows, but it doesn't work still. Here is my code: view: def profile_view(request, user): u = User.objects.get(pk=user) up = UserProfile.objects.get(created_by = u) cv = UserProfile.objects.filter(created_by = User.objects.get(pk=user)) blog = New.objects.filter(created_by = u) replies = Reply.objects.filter(reply_to = blog) vote = Vote.objects.filter(voted=blog) following = Relations.objects.filter(initiated_by = u) follower = Relations.objects.filter(follow = u) return render_to_response('profile/publicProfile.html', { 'vote': vote, 'u':u, 'up':up, 'cv': cv, 'ing': following.order_by('-date_initiated'), 'er': follower.order_by('-date_follow'), 'list':blog.order_by('-date'), 'replies':replies }, context_instance=RequestContext(request)) and my url: urlpatterns = patterns('', url(r'^profile_view/(?P<user>\d+)/$', profile_view, name='profile_view'), thanks in advance!

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  • Android RandomAccessFile usage from resource

    - by lacas
    my code is String fileIn = resources.getResourceName(resourceID); Log.e("fileIn", fileIn); //BufferedReader buffer = new BufferedReader(new InputStreamReader(fileIn)); RandomAccessFile buffer = null; try { buffer = new RandomAccessFile(fileIn, "r"); } catch (FileNotFoundException e) { Log.e("err", ""+e); } /fileIn(6062): ls3d.gold.paper:raw/wwe_obj i get 11-26 15:06:35.027: ERROR/err(6062): java.io.FileNotFoundException: /ls3d.gold.paper:raw/wwe_obj (No such file or directory) How can I access a file using randomaccessfile in java? How can I load from a resource? (R.raw.wwe_obj)

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  • difference in logging mechanism: API and application(python)

    - by zubin71
    I am currently writing an API and an application which uses the API. I have gotten suggestions from people stating that I should perform logging using handlers in the application and use a "logger" object for logging from the API. In light of the advice I received above, is the following implementation correct? class test: def __init__(self, verbose): self.logger = logging.getLogger("test") self.logger.setLevel(verbose) def do_something(self): # do something self.logger.log("something") # by doing this i get the error message "No handlers could be found for logger "test" The implementation i had in mind was as follows: #!/usr/bin/python """ .... .... create a logger with a handler .... .... """ myobject = test() try: myobject.do_something() except SomeError: logger.log("cant do something") Id like to get my basics strong, id be grateful for any help and suggestions for code you might recommend I look up. Thnkx!

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  • I cant really wrap my head around BOOLEAN logic when I use NOT together with AND and OR

    - by Bq
    Im trying to understand how boolean logic works when I use NOT. To give an example using awk I have a text file containing CORE PORT CORE PORT COREPORT CORE COREPORT And I would like to remove all COREPORT lines. The way I thought I would do it was with (NOT CORE) AND (NOT PORT) eg awk '/!CORE/&&/!PORT/{print}' But when I try it out Im actually supposed to use OR instead of AND awk '/!CORE/||/!PORT/{print}' I would be really glad if some one could explain where my thinking is wrong and super glad if it could be visualized with a venn diagram or something like the boolean machine at kathyschrock

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  • Writing Facebook apps in C#

    - by Water Cooler v2
    Hi, I am a C# developer and fancy the idea of writing a C# app or two to integrate with the Facebook API. I read from this page: http://wiki.developers.facebook.com/index.php/User:C_Sharp that there's this Microsoft SDK for Facebook Platform that has binary assemblies that I can use to write my C# app. As a start, I want to try out the example mentioned on the above-mentioned page -- one that gets me a friend list. The problem is: I am completely new to this Facebook development thing and I see I am going to need, at the very least, an API Key and some Facebook service Secret key or some such, to begin writing some code. Do I also need a developer account? Where do I get all these things from?

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  • Application of a rule based expert system

    - by simon
    Hi, The company I am working now has developed a Rule-based Expert System. It is a web-based system and supports Flow Chart, Decision Table, Fuzzy Rules and Forward Chaining Rules. It is something like iLog but less complex and powerful. However, one serious problem we are facing now is that we have NO CUSTOMER so far. We have spent 4 yrs to develop that product. Because my company is a start-up and has no reference, no one is confident in our product. Without feedback, we cannot improve our product. I am wondering if we should change our product into SAAS and make it free for people to try, or it has NO MARKET at all. (I will lose my job then..) Please give me some suggestions. Many Thanks!

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  • Update MySQL table from jsp

    - by vishnu
    I have these in a jsp file. But these values are not updated in the mysql table. May be it is not commiting. How can i solve this ? String passc1 = request.getParameter("passc1"); String accid = request.getParameter("accid"); int i = 0; String sql = " update customertb " + " set passwd = ?" + " where acc_no = ?;"; try { PreparedStatement ps = con.prepareStatement(sql); ps.setString(1, passc1); ps.setString(2, accid); i = ps.executeUpdate(); } catch (Exception e) { // do something with Exception here. Maybe just throw it up again } finally { con.close(); }

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  • PHP reading 'get' variable that may or may not have been set

    - by thecoshman
    Simply put, if you try to read the value of a get variable, what happens if said variable had not be put into the URL. Example: you request the page test.php, in that file it tries to read the value of $_GET['message']. What happens in this case? dose the value just get returned as ''? Dose this mean, that if I am always expecting a value to be entered, and am not willing to accept a value of '' that I can just do something like $foo = $_GET['bar']; if($foo == ''){ // Handle my 'error' } else { // $foo should now have a value that I can work with } Please bare in mind I know that I could use isset($_GET['bar']) But I don't just want to know if it is set, I don't care if it is or not, I just care if it has a value that is more then just an empty string.

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  • Drag and Drop text - What am I missing?

    - by Harvey
    I am trying to add drag-and-drop text to my Doc-View App. I added the COleDropTarget variable to the view class, registered it in OnCreate(). I added OnDragEnter(), OnDragOver(), OnDragLeave() and OnDrop() to that class as virtual overrides, but none of them are ever called. I previously had added m_pMainWnd-DragAcceptFiles(TRUE); to my App class. I tried commenting out that statement, but no affect. I tried using Spy++ to see where the messages go while I do a drag, but it logs nothing at all while I am dragging the text around in the App. What do I need? Or what else can I try, to narrow down the problem? TIA, Harvey

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  • Recaptcha being triggered from masterpage control

    - by superexsl
    Hey, I have a master page which contains a Login control so that the user can login/logout from any page. However, a couple of content pages require a Recaptcha control. This causes problems because when I try and log in on a page that has the Recaptcha control, the system expects me to enter the words. I'm aware of the lack of validation groups in the Recaptcha control, and the fact that you can't have multiple forms on an ASP.NET page. Is there a way to work around this? A 'hacky' way I can think of, is in the "Login" event, check the page for a Recaptcha control. If one exists, then disable it, otherwise continue. However, that just seems quite inefficient especially when there are quite a few pages and most won't have a Recaptcha control.

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  • Which .NET class does represent the main CONTROLLER class for WebForms ?

    - by Renato Gama
    Hey guys, lately I was studying a bit of Java, when I was taught about a way to implement a controller class, whose resposibility is to redirect the request to an Action, which perfoms a specified work. That was the way I learnt; @Override protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { try { String clazz = req.getRequestURI().replaceAll(req.getContextPath() + "/", "").replaceAll(".java", ""); ((Action)Class.forName("com.myProject.actions." + clazz).newInstance()).execute(req, res); } catch (Exception e) { e.printStackTrace(); } } I know that WebForms also works with HANDLERS, which are kind of actions. For example, each .aspx page inherits from a Page object which is a handler for that specified page. What I couldn't figure out is, which class does get request first and translate it to the specified action (page handler)? Is it a WebForms feature(implementation) or its a IIS resposibility? So, which class represent the main controller for WebForms? Thank you very much.

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  • How to change the value of None in Python?

    - by michael
    I'm currently reading chapter 5.8 of Dive Into Python and Mark Pilgrim says: There are no constants in Python. Everything can be changed if you try hard enough. This fits with one of the core principles of Python: bad behavior should be discouraged but not banned. If you really want to change the value of None, you can do it, but don't come running to me when your code is impossible to debug. I tried this in the interpreter None = "bad" I get a SyntaxError: assignment to None Just out of curiosity how do you change None?

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  • Is there a DRMAA Java library that works with Torque/PBS?

    - by dondondon
    Does anybody know a Java implementation of the DRMAA-API that is known to work with PBS/Torque cluster software? The background behind this: I would like to submit jobs to a newly set-up linux cluster from java using a DRMAA compliant API. The cluster is managed by PBS/Torque. Torque includes PBS DRMAA 1.0 library for Torque/PBS that contains a DRMA-C binding and provides in libdrmaa.so and .a binaries. I know that Sun grid engine includes a drmaa.jar providing a Java-DRMAA API. In fact I opted to use SGE but it was decided to try PBS first. The theory behind that decision was: 'DRMAA is a standard and therefore a Java API needs only a standards compliant drmaa-c binding.' However, I couldn't find such 'general DRMAA-C-java API' and now assume that this assumption is wrong and that the Java libraries are engine specific. Are we stuck here? Any comments appreciated.

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  • UITableViewController's TableView becomes NULL

    - by Travis
    I have UITableViewController (initiated by the Navigation-based app project template). I am overriding loadView and putting up an alternative view (w/ a UILabel and UIActivityIndicator) to display while the table's contents is loading. When the loading is done, I remove the loading view and try to display the table view but I see that it's NULL. So in the simulator I see my loading view and then when the loading's done the view disappears but my tableview never comes. I'm confused what the difference is between self.view and self.tableView in my UITableViewController and how I can exchagn

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  • Pass associative arrays in call_user_func_array(...)

    - by Matt
    Hey all, I'm building a templating system and I'm running in to an issue with calling functions on the fly. When I try the following: $args = array( 4, 'test' => 'hello', 'hi' ); You know.. some numerical elements some associative elements, call_user_func_array($function, $args); converts the array to something like this: $args = array( 4, 'hello', 'hi' ); Is there any way around this other than passing an array like this: $args = array( 4, array('test' => 'hello'), 'hi' ); Thanks! Matt

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