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  • Doing a count over a filter query efficiently in django

    - by apple_pie
    Hello, Django newbie here, I need to do a count over a certain filter in a django model. If I do it like so: my_model.objects.filter(...).count() I'm guessing it does the SQL query that retrieves all the rows and only afterwards does the count. To my knowledge it's much more efficient to do the count without retrieving those rows like so "SELECT COUNT(*) FROM ...". Is there a way to do so in django?

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  • Python and IronPython on same machine?

    - by rudimenter
    I am a total newbie in the Python world. I want to start to experiment with Python and IronPython and compare the results. Is it possible to install Python and IronPython on the same machine with interfering each other or is it besser to this in the virtual machine. Thx in advance.

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  • How can I stop user from navigating to the previous page

    - by ryanlancer
    Hi, I am developing a simple email portal as my college assignment and I refer gmail for various features.Now when we sign into a gmail account and then if we hit the back button of the browser we somehow still remain on the inbox page.In my case after login if I press back button I comeback to the login page.Please suggest how can I achieve this.Also I am a newbie to ASP.NET so keep it detailed

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  • vim c++ break line

    - by Myx
    Hello: How can I break long lines when writing c++ code in vim? For example, if I have something like 56 fprintf(stderr, "Syntax error reading recursion value on 57 line %d in file %s\n", line_count, filename); I get the following compile errors: :56:25: warning: missing terminating " character :56: error: missing terminating " character :57: error: stray ‘\’ in program :57:37: warning: missing terminating " character :57: error: missing terminating " character I'm a vim newbie. Thanks!

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  • free video streaming API

    - by rl123
    Hi, I'm trying to build a website that will allow user to upload video files and show them as a streaming video. I'm a complete newbie in the streaming world so I don't know exactly how to do that, and I definitely don't want to reinvent the wheel. Are there any free platforms that I can use for that? Do I need a streaming server, or is there a special kind of player I can use that does not require dedicated server? Thanks!

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  • Parse contents of directory to bash command in a script

    - by ECII
    I have the directory ~/fooscripts/ and inside there are foo1.txt, foo2.txt, etc etc I have a command that takes the file foo1.txt as input and does some calculation. The output location etc is handled internally in fooprog fooprog -user-data=foo1.txt I would like to automate the whole thing in a bash script so that the script will parse all txt files in ~/fooscripts/ sequentially. I am a newbie in bash. Could anyone give me a hint?

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  • Is 1-to-n multicast on the open internet reliable?

    - by Jeremy Dunck
    I'm a newbie at networking. I understand the concept of multicast, but was wondering if it's reliable on the open/public internet? It seems like sort of an edge case that different backbones or ISPs might intentionally break to reduce router load or generally segment the network for practical high-use applications. Is my fear reasonable? P.S. Follow-up question here: http://stackoverflow.com/questions/256125/best-tutorial-for-application-multicasting

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  • CursorLoader, get URI for local database

    - by user1681358
    I'm a newbie android programmer and I recently followed a tutorial which shows how to create a local SQLite database by using SQLiteDatabase.rawQuery to return a Cursor. I would like to modify my app to use CursorLoader which is apparently a better way to access the database. My problem is the CursorLoader constructor expects a URI to be given. Do I just input "file:///[path to db]"? Seems a bit messy.

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  • ASP.NET MVC URL/Routing question

    - by Hobbes
    Hello! I am an MVC newbie. I'm trying to get my URLs to look like this: /Corporate/Users/Edit/1 /Corporate/Stores/Edit/17 /Corporate/Contacts/Edit/17 /Store/Contacts/Create /Store/Products/Edit/29 Pretty much like plain-vanilla urls, except with a user type at the front. I'm running into a lot of problems with duplicate controller names, etc. Is there a simple way to do this? I looked briefly at Areas, but this seemed way to complicated.

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  • Objective C: Include class and call method

    - by Nic Hubbard
    I have built a class which has a few methods in it, once of which returns an array, lets call this class A. I have a second class, class B, which I would like to use to call the method from class A. But, now how do I call that method from class A and store what is returned in a var in class B? Do I have to initiate the class? I have made sure to include the .h file from class A into class B. Thanks for helping a newbie.

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  • C struct memory layout?

    - by Eonil
    I have C# background. Very newbie to low level language like C. In C#, memory layout by compiler by default, and I have to specify some special attribute to override this behavior for exact layout. As I know, C does not re-align by default. But I heard there's a little re-aligning behavior which very hard to find. Can I know about C's memory layout behavior? (what should be re-aligned and not)

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  • is it possible to add a string template to views in a .net mvc project?

    - by Lina
    Hi, I have a newbie question,, how do i add a string template to the views folder in a .net mvc project? i have added a reference to StringTemplate.dll and antlr.runtime.dll but seems that is not enough. i.e. when i right-click on views and choose Add New Item i can't find a file with .st extension in the list that i get... how do i achieve that? Thanks a million in advance

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  • Download File from server that uses Icefaces form based authentication

    - by user266443
    I am a newbie to ICEfaces and i have a requirement where i need to download a document from a given url (http://ipaddress/formexec?objectid=201). This URL uses a form based authentication that is deployed through ICEFaces. i tracked the request of this URL and i get the following line: &ice.submit.partial=false&ice.event.target=loginForm%3Aj_id33&ice.event.captured=loginForm%3Aj_id33 Is there any libraries or code to download the document by successfully passing the username and password.

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  • Most suitable Unix platform for developing device drivers

    - by bugspy.net
    I completely newbie in device drivers, so I hope my question is in place, but I need to develop a driver to control some equipment. I was thinking on using Linux as the host OS, but not sure if it is such good idea. I've heard some horror stories about the mess of developing device drivers under Linux. Is there a better alternative under the *Nix world? Or maybe should I check other OSes?

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  • SQLAlchemy: an efficient/better select by primary keys?

    - by hadrien
    Yet another newbie question.. Let's say I have an user table in declarative mode: class User(Base): __tablename__ = 'user' id = Column(u'id', Integer(), primary_key=True) name = Column(u'name', String(50)) When I have a list of users identifiers, I fetch them from db with: user_ids = [1, 2, 3, 4, 5] users = Session.query(User).filter(User.id.in_(user_ids)).all() I dislike using in_ because I think I learned it has bad performance on indexed fields (is that true/false?). Anyway, is there a better way doing that query? Thanks!

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  • Searching a Better Solution with Delegates

    - by spagetticode
    Hey All, I am a newbie in C# and curious about the better solution of my case. I have a method which gets the DataTable as a parameter and creates a List with MyClass's variables and returns it. public static List<Campaigns> GetCampaignsList(DataTable DataTable) { List<Campaigns> ListCampaigns = new List<Campaigns>(); foreach (DataRow row in DataTable.Rows) { Campaigns Campaign = new Campaigns(); Campaign.CampaignID = Convert.ToInt32(row["CampaignID"]); Campaign.CustomerID = Convert.ToInt32(row["CustomerID"]); Campaign.ClientID = Convert.ToInt32(row["ClientID"]); Campaign.Title = row["Title"].ToString(); Campaign.Subject = row["Subject"].ToString(); Campaign.FromName = row["FromName"].ToString(); Campaign.FromEmail = row["FromEmail"].ToString(); Campaign.ReplyEmail = row["ReplyEmail"].ToString(); Campaign.AddDate = Convert.ToDateTime(row["AddDate"]); Campaign.UniqueRecipients = Convert.ToInt32(row["UniqueRecipients"]); Campaign.ClientReportVisible = Convert.ToBoolean(row["ClientReportVisible"]); Campaign.Status = Convert.ToInt16(row["Status"]); ListCampaigns.Add(Campaign); } return ListCampaigns; } And one of my another DataTable method gets the DataTable from the database with given parameters. Here is the method. public static DataTable GetNewCampaigns() { DataTable dtCampaigns = new DataTable(); Campaigns Campaigns = new Campaigns(); dtCampaigns = Campaigns.SelectStatus(0); return dtCampaigns; } But the problem is that, this GetNewCampaigns method doesnt take parameters but other methods can take parameters. For example when I try to select a campaign with a CampaignID, I have to send CampaignID as parameter. These all Database methods do take return type as DataTable but different number of parameters. public static DataTable GetCampaignDetails(int CampaignID) { DataTable dtCampaigns = new DataTable(); Campaigns Campaigns = new Campaigns(); dtCampaigns = Campaigns.Select(CampaignID); return dtCampaigns; } At the end, I want to pass a Delegate to my first GetCampaignList Method as parameter which will decide which Database method to invoke. I dont want to pass DataTable as parameter as it is newbie programming. Could you pls help me learn some more advance features. I searched over it and got to Func< delegate but could not come up with a solution.

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  • how to find hidden information

    - by user356029
    hye im newbie here.. im looking for a hidden information in a source code..in the page, the information is visible but when i try to find it in the source code, the information is not there..but behind the code it has [script type = "text/javascript].. i believe the information i need is in between the javascript..my question is, how to get the information between the javascript?..it has the innerHtml code between the javascript..any one can help?

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