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  • How to draw N first elements?

    - by noober
    Hello all, There is a canvas element with 10 children (polygons). There is a number in my code from 1 to 10. I'd like to draw the first N elements from the children elements, base on my number. It would be the best solution to do this from XAML with a minimum code-behind like this: ... MyCanvas.N = 5; ...

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  • Reduce the number of queries in EF

    - by Gio2k
    I have the following Model: Entities: Product (Contains basic data for products: price, etc) Attribute (Contains data for all possible optional attributes) ProductAttribute (Contains data for optional attributes of a product, eg. Color, Model, Size). ProductAttribute is essentially a many to many relationship with payload (ProductId, AttributeID, Value) And this piece of code: private static void ListAttributes(Product p) { p.ProductAttributes.Load(); foreach (var att in p.ProductAttributes) { att.Attribute.load(); Console.WriteLine("\tAttribute Name:{0} - Value {1}", att.Attribute.Name, att.AttributeValue); } } This piece of code will fire a query for each time the att.Attribute.Load() method is called in the foreach loop, only so i can get display the name of the attribute. I would like to fetch the Attribute.Name together with the query that fetches all attribute values, i.e. join ProductAttribute and Attribute. Is there any way to achieve this within my method?

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  • GAE update different fields of the same entity

    - by bach
    Hi, UserA and UserB are changing objectA.filedA objectA.filedB respectively and at the same time. Because they are not changing the same field one might think that there are no overlaps. Is that true? or the implementation of pm.makePersistnace() actually override the whole object... good to know...

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  • Is there a generic interface wrapper framework

    - by epitka
    Is there a framework or a native way in .net to dynamically generate wrappers for specified interface. I need a way to say, here is a type I have and here is the interface I want to wrap around it, and for each method it the interface forward calls to these methods on the type provided.

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  • Select an entity according to a list of associated entities

    - by Maverickch
    I have the following database schema : Two tables, books and tags, with n-m relationship. Books - Tags We can have for example the book 1, with tags {A,B,C}, and book 2, with tags {A}. I would like to select the books according to a list of tags. For example : selected tags list : {A,B} - book 1 My idea was to use the MINUS SQL function, to subtract book tags list to the selected tags list, and return the book if the list was empty. Unfortunately, this SQL function is not supported by HQL. Any idea about that ?

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  • using Hibernate to loading 20K products, modifying the entity and updating to db

    - by Blankman
    I am using hibernate to update 20K products in my database. As of now I am pulling in the 20K products, looping through them and modifying some properties and then updating the database. so: load products foreach products session begintransaction productDao.MakePersistant(p); session commit(); As of now things are pretty slow compared to your standard jdbc, what can I do to speed things up? I am sure I am doing something wrong here.

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  • symfony and entity manager

    - by Jenis Sam
    I want to do the following I have a database table of students, and I want to output each student name in a check box list. so checkbox. Student 1 checkbox. Student 2 Where the value of the checkbox is the student's ID. How can I do that using Symfony? I want teachers to be able to select one or more checkboxes. I tried following this tutorial: http://symfony.com/doc/current/cookbook/form/form_collections.html and using collections, but I am lost...

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  • Code blocks not linking extension SDL Libraries

    - by Code Learner
    CodeBlocks is not linking extension SDL Libraries like SDL_mixer and SDL_image? I followed Lazy Foo's tutorial for SDL 1.2 but I am compiling my program in SDL 2.0. The compiler is showing an error with the linking of the libraries though without the mixer library it is working. My linker setting look like this. //This is working -lmingw32 -lSDL2main -lSDL2 //But with the additional mixer library it is not working -lmingw32 -lSDL2main -lSDL2 -lSDL_mixer Please help!

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  • Scan for first zero bit (Assembly)?

    - by cthulhu
    I have some numbers in AH, AL, BL, BH registers. I need to check whether there is 0 bit in each of the registers in left half of the number. If yes, then put into check variable value 10 else -10. How can I do this? I tried something like that: org 100h check dw 0 mov ah, 11111111b mov al, 11111111b mov bl, 11111111b mov bh, 11111111b mov check, -10 shr ah, 4 shr al, 4 shr bl, 4 shr bh, 4 cmp ah, 0Fh jz first first: cmp al, 0Fh jz second second: cmp bl, 0Fh jz third third: cmp bh, 0Fh jz final final: mov check, 10 ret

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  • Django @ Google App Engine - Site Map Framework

    - by dkp
    Hi Folks, has anybody managed to get Djangos site map framework to run on Google App Engine? I receive the following exception: ImproperlyConfigured at /sitemap.xml You haven't set the DATABASE_ENGINE setting yet. Request Method: GET Request URL: http://127.0.0.1:8080/sitemap.xml Exception Type: ImproperlyConfigured Exception Value: You haven't set the DATABASE_ENGINE setting yet. Exception Location: D:\Program Files\Google\google_appengine\lib\django\django\db\backends\dummy\base.py in complain, line 13

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  • coldfusion class path for multiple services - only recognizing first directory

    - by ffc
    Hi, I am trying to use multiple web services on a single CF page. I have entered the stubs directory for each of the web services in the ColdFusion Class Path within administrator server settings java and jvm paths are listed separated by commas: c:\coldfusion9\stubs\ws1,c:\coldfusion9\stubs\ws2 for some reason, only the web service whose stub path is listed first will work. When I try to call the second web service, I get a "web service operation ... cannot be found" but if i switch the order of paths listed in the admin settings and restart the service, the web service listed first now will work. any ideas on how to manage multiple web services and their stubs ? thanks!

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  • Read and Step into .Net Framework Source Code

    - by ChloeRadshaw
    I did ask whether this was possible in 2008 which was answered in http://stackoverflow.com/questions/1296840/read-and-step-into-net-framework-source-code. However my problem is that I am using 2005 and not 2008. Does anyone know whether this is possible please?? The reason I want to do this is to better understand C# paradigms. With Java this is possible and I learnt a tremendous amount by being able to read code written by engineers

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  • sqlite & python - only pulls the first result

    - by pencilNero
    This is pretty strange (admitedly, this is my first attempt with python / sqlite), but I can seem to get all of the rows if I do a fetchAll(), but other than that - no matter what I try, always ends up in the db only returning the first row - the second iteration stops because a null is returned. Wondering if there is something wrong with how I am coding this up in python? The db seems ok.. con = sqlite3.connect('backup.db') con.row_factory = sqlite3.Row cur = con.cursor() cur.execute('select * from tb1;') for row in cur: try: # row = dataCur.fetchone() #if row == None: break print type(row) print ' Starting on: %i' % row[0] cleaner = Cleaner(scripts=True, remove_tags=['img'], embedded=True) try: cleaned = cleaner.clean_html(row[2]) #data stored in second col cur.execute('update tb1 set data = ? where id = ?;', (cleaned, row[0])) except AttributeError: print 'Attribute error' print ' Ended on: %i' % row[0] except IOError: print 'IOexception'

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  • How to invert arrow image placed before the first cell when tableview cells are swiped beyond first

    - by neha
    Hi all, In my application, I need to add this functionality that there should be an arrow image upside down placed before first cell and some text like "Pull down to refresh" and when user pulls the table beyond this then this arrow gets inverted and text changes to "Release to refresh" and when the user releases his finger, the data is refreshed and rows get added to that point So now this initial arrow and text moves upwards before the first cell again. Can anybody tell me wheather there's any event that does this? Or else which event I need to capture in order to add this functionality? Thanks in advance.

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  • Ignore first line on csv parse Rails

    - by Jack
    Hi, I am using the code from this tutorial to parse a CSV file and add the contents to a database table. How would I ignore the first line of the CSV file? The controller code is below: def csv_import @parsed_file=CSV::Reader.parse(params[:dump][:file]) n = 0 @parsed_file.each do |row| s = Student.new s.name = row[0] s.cid = row[1] s.year_id = find_year_id_from_year_title(row[2]) if s.save n = n+1 GC.start if n%50==0 end flash.now[:message] = "CSV Import Successful, #{n} new students added to the database." end redirect_to(students_url) end

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  • Best logging framework for native C++?

    - by Jox
    I'm looking for logging framework for C++ project. My best shoot was log4cxx, but it seems that it's abandoned project, with development stopped ~4 years ago, with only one update in last 4-5 years. Anything better that log4cxx? (log4c & log4cpp are also totally out-of-date)...

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  • Can I write to different jetty databases using JPA that is using the same "entity class"

    - by Per
    I am using Java persistance and there EntityManager class and have it assigned to storage a class object that shall be written to the database. My problem is that I want to write to different databases using the same storage class. My solution to that was to write a StorageManagerfactory that has a Map holding all EntityManagers. The solution looked good until I looked at the databases and realized that all information (undepending of the Map, which gets the correct value) was written to the same database (one of the initialised in the Map). So my question is: Can I write to different databases using JPA that is using the same storage class (the class holding the structure of my database)? Thanks

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