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• Why can't I see any data in the Google App Engine *Development* Console?

  - by willem

  I run my google app engine application in one of two ways... Directly by using the application from http://localhost:8080 Or execute unit tests from http://localhost:8080/test When I create entities by using the application directly, the data is visible in the Development Console (dataStore view). However, when I execute the unit tests... even if they succeed and I can put() and get() data, the data does not show in the dataStore view. Any idea why I can't see my data? Even though it is there? Notes: I use GAEUnit for unit tests. the data stored mostly consists of StringProperties(). I use Python and run Django on top of the GAE, don't know if that matters.

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• Erlang bit indexing

  - by GTDev

  I am currently trying to learn erlang and what I am trying to do is to perform an operation on specific indices of an array stored in a bit array or int. If there is a 0 in a position, the index into the array at that position is not used. So envision the following: Example the array is: [1, 3, 5, 42, 23] My bit array is: 21 = 10101 in binary so I'm using indicies 1,3,5 so I'm calling a function on [1, 5, 23] my function is of the form my_function(Array, BitArray) -> SubArray = get_subarray_from_bitarray(Array, BitArray), process_subarray(SubArray). And I need help with the get_subarray_from_bitarray(). I know erlang has special syntax around bit strings (something like <<) so is there an efficient way of indexing into the bit array to get the indicies?

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• UML tool required for C#

  - by Peter Morris

  I need some help - here are my requirements. 1: I should be able to modify the UML model without affecting the code, and then later apply the changes. This is because I need to print the changes, get them confirmed, and then develop them. 2: I should be able to reuse parts of the model. For example I would create one project which outputs A.dll assembly, and then another UML project would use the classes in the first to crate B.dll 3: Project stored as text so I can see changes in version control history. 4: Together is too expensive :-)

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• Loading tables dynamically with NHibernate

  - by Trevor Goertzen

  I'm working on a project that requires me to load tables based on table names stored in another table. More tables will be added to the DB (and by someone else), so creating NHibernate mapping files for each table isn't an option. Does anyone know if it is possible to load tables dynamically using NHibernate? Edit: I should add that I'm on .NET 2.0, so I can't use Fluent NHibernate. Thanks for the suggestion though guys. I will use that as evidence in convincing my associates to upgrade.

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• Daily/Weekly/Monthly Record Count Search via StoredProcedure

  - by user270960

  Using MS SQL Server.I have made a Stored Procedure naming "SP_Get_CallsLogged". I have a table named "TRN_Call", and it has one column named "CallTime" which is a DateTime. I have a web-page in my application where the User enters:- 1.StartDate (DateTime) 2.EndDate (DateTime) 3.Period(Daily/Weekly/Monthly) (varchar) (from DropDownList) I want to get the Record Count of those calls in my table *TRN_Call* on the basis of the specified Period(Daily/Weekly/Monthly) selected by user in the DropDownList. e.g. StartDate ='1/18/2010 11:10:46 AM' EndDate ='1/25/2010 01:10:46 AM' Period =Daily So the record count between these above mentioned dates(StartDate+EndDate) should come in a manner so that I can refer to those counts separately i.e. the following:- Date 1/18/2010 Records Found 5 Date 1/19/2010 Records Found 50 Date 1/20/2010 Records Found 15 Date 1/21/2010 Records Found 32 Date 1/22/2010 Records Found 12 Date 1/23/2010 Records Found 15 Date 1/24/2010 Records Found 17 Date 1/25/2010 Records Found 32 and send those Counts to the Web Application so that these counts could be listed then in the Crystal Reports.

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• NHibernate bag is always null

  - by Neville Chinan

  I have set up my mapping file and classes as suggested by many articles class A { ... IList BBag {get;set;} ... } class B { ... A aObject {get;set;} ... } <class name="A">...<bag name="BBag" table="B" inverse="true" lazy="false"><key column="A_ID" /><one-to-many class="B" /></bag>... <class name="B">...<many-to-one name="aObject" class="A" column="A_ID" />... I added a set of A's to the A table and a set of B's to the B table, all the data is stored as expected. However if I try and access aInstance.BBag.Count I get a null reference exception. I think I missing some key knowledge on how an bag gets instantiated. Thanks

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• CTE and last known date processing

  - by stackoverflowuser

  Input @StartDate = '01/25/2010' @EndDate = '02/06/2010' I have 2 CTEs in a stored procedure as follows: with CTE_A as ( [gives output A..Shown below] ), with CTE_B as ( Here, I want to check if @StartDate is NOT in output A then replace it with the last known date. In this case, since @startdate is less than any date in output A hence @StartDate will become 02/01/2010. Also to check if @EndDate is NOT in output A then replace it with the last known date. In this case, since @enddate is 02/06/2010 hence it will be replace with 02/05/2010. // Here there is a query using @startDate and @EndDate. ) output A Name Date A 02/01/2010 B 02/01/2010 C 02/05/2010 D 02/10/2010

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• How do I sync Dreamweaver site definitions across 2 computers?

  - by baritoneuk

  I use Dreamweaver on my laptop and Desktop PC and frequently change between them. I keep all my sites synced using Syncplicity (similar to Dropbox, which indecently I also use) I want my site definitions to be synced across the two computers. If I add a new site on one computer I want it to appear on the other one. I know I can export all sites on one computer and then get Syncplicity to sync the files to the other computer at which point I can import them. However this relies on me remembering to do this each time I add a new site, and it's also quite time consuming. As far as I can tell, Dreamweaver (at least upto CS4- not sure about CS5) stupidly stores the site definitions in the registry. I really don't know why they do this- if they stored it in xml files then I could easily sync the information. Does anyone know if what I am asking is possible?

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• Do you use enums in your data applications and how?

  - by Ivan

  My practice shows that a general enterprise application has a lot of entities which's nature corresponds to an elementary enumeration. For example We may have an Order entity which may have such fields as "OrderType", "OrderStatus", "Currency", etc. referencing corresponding Entities which are nothing more than just a textual name bound to a key to be referenced. Using enums would look very natural here. But entities have to be defined in application code at design-time, am I right? While in we need to be able to CRUD enum value variants at runtime and use enums in server-side SQL queries (like stored procedures and views). What are you practices and thoughts on this subject? I am particularly interested in C#4, linq and T-SQL.

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• Static struct in C++

  - by pingvinus

  Hi, I want to define an structure, where some math constants would be stored. Here what I've got now: struct consts { //salt density kg/m3 static const double gamma; }; const double consts::gamma = 2350; It works fine, but there would be more than 10 floating point constants, so I doesn't want to wrote 'static const' before each of them. And define something like that: static const struct consts { //salt density kg/m3 double gamma; }; const double consts::gamma = 2350; It look fine, but I got these errors: 1. member function redeclaration not allowed 2. a nonstatic data member may not be defined outside its class I wondering if there any C++ way to do it?

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• SQL Server 2008 BULK INSERT causes more reads than writes. Why?

  - by sh1ng

  I've huge a table (a few billion rows) with a clustered index and two non-clustered indices. A BULK INSERT operation produces 112000 reads and only 383 writes (duration 19948ms). It's very confusing to me. Why do reads exceed writes? How can I reduce it? update query insert bulk DenormalizedPrice4 ([DP_ID] BigInt, [DP_CountryID] Int, [DP_OperatorID] SmallInt, [DP_OperatorPriceID] BigInt, [DP_SpoID] Int, [DP_TourTypeID] Int, [DP_CheckinDate] Date, [DP_CurrencyID] SmallInt, [DP_Cost] Decimal(9,2), [DP_FirstCityID] Int, [DP_FirstHotelID] Int, [DP_FirstBuildingID] Int, [DP_FirstHotelGlobalStarID] Int, [DP_FirstHotelGlobalMealID] Int, [DP_FirstHotelAccommodationTypeID] Int, [DP_FirstHotelRoomCategoryID] Int, [DP_FirstHotelRoomTypeID] Int, [DP_Days] TinyInt, [DP_Nights] TinyInt, [DP_ChildrenCount] TinyInt, [DP_AdultsCount] TinyInt, [DP_TariffID] Int, [DP_DepartureCityID] Int, [DP_DateCreated] SmallDateTime, [DP_DateDenormalized] SmallDateTime, [DP_IsHide] Bit, [DP_FirstHotelAccommodationID] Int) with (CHECK_CONSTRAINTS) No triggers & foreign keys Cluster Index by DP_ID and two non-unique indexes(with fillfactor=90%) And one more thing DB stored on RAID50 with stripe size 256K

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• the MVCC effect on migration from oracle to db2

  - by Ryan Fernandes

  I have a simple (actually simplified :) ) scenario that is possibly the cause for the headache I've been having for the last few days... My current application (that serves 100's of users) currently uses Oracle as the database. I have no stored procs (I wish actually). Now, I've been asked if the product will work if I migrate to IBM DB2 as the database. So, after taking Oracle for granted all this while.... and having re-read Tom's article on MVCC (Multiversion Concurrency Control) and going through this post stating that DB2 is not 'on the list' or 'just tip-toeing in the area' as it were... I know I can't be sure that the product will work with DB2 as is. Is there no hope.. or is there a nice disclaimer I could use.. ?

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• Is do-notation specific to "base:GHC.Base.Monad"?

  - by yairchu

  The idea that the standard Monad class is flawed and that it should actually extend Functor or Pointed is floating around. I'm not necessarily claiming that it is the right thing to do, but suppose that one was trying to do it: import Prelude hiding (Monad(..)) class Functor m => Monad m where return :: a -> m a join :: m (m a) -> m a join = (>>= id) (>>=) :: m a -> (a -> m b) -> m b a >>= t = join (fmap t a) (>>) :: m a -> m b -> m b a >> b = a >>= const b So far so good, but then when trying to use do-notation: whileM :: Monad m => m Bool -> m () whileM iteration = do done <- iteration if done then return () else whileM iteration The compiler complains: Could not deduce (base:GHC.Base.Monad m) from the context (Monad m) Question: Does do-notation work only for base:GHC.Base.Monad? Is there a way to make it work with an alternative Monad class? Extra context: What I really want to do is replace base:Control.Arrow.Arrow with a "generalized" Arrow class: {-# LANGUAGE TypeFamilies #-} class Category a => Arrow a where type Pair a :: * -> * -> * arr :: (b -> c) -> a b c first :: a b c -> a (Pair a b d) (Pair a c d) second :: a b c -> a (Pair a d b) (Pair a d c) (***) :: a b c -> a b' c' -> a (Pair a b b') (Pair a c c') (&&&) :: a b c -> a b c' -> a b (Pair a c c') And then use the Arrow's proc-notation with my Arrow class, but that fails like in the example above of do-notation and Monad. I'll use mostly Either as my pair type constructor and not the (,) type constructor as with the current Arrow class. This might allow to make the code of my toy RTS game (cabal install DefendTheKind) much prettier.

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• scanf stop reading when eol is seen

  - by gcc

  scanf("%[^\n]\n",A[i]); /*that reads input line by line; example:first line is stored in A[0]*/ -> but I want read each element of line and send to struct fuction until the EOL (end of line) -> explaining: in current line,read one data ,then send to struct funcion to hold,after then ,in for loop, read next data decide it is float then send it to function. when eol is read, then activate next struct. >question is I want write something in scanf such that I stop read when i see eol. can I do for( ; ; ) { scanf("...",Sam); if(Sam=='\n) break; }

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• object representation and value representation

  - by FredOverflow

  3.9 §4 says: The object representation of an object of type T is the sequence of N unsigned char objects taken up by the object of type T, where N equals sizeof(T). The value representation of an object is the set of bits that hold the value of type T. For trivially copyable types, the value representation is a set of bits in the object representation that determines a value, which is one discrete element of an implementation-defined set of values. Does "The value representation of an object" imply that values are always stored in objects? What is the value representation of non-trivially copyable types?

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• Flashing and closing PyS60 SIS

  - by Matrich

  I created a py script for S60 2nd Edition FP3 with a background image, database, sound files which are stored in a folder on c drive. After several hours, I have managed to convert it into sis which I sent to my mobile phone. First, I installed the sis on the external memory and it failed to work. I read online that it should be on the same drive as python runtime. So I installed it on phone memory but it just flashes and then closes. I made another sis with a database and it worked so I suspect it could be because it cant find the background image and sound files in the folder. How can I know the cause of this? Also, how can I include the background image and sound files with the sis so that they are automatically installed when installing the sis file?

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• Is it possible to use DLR in a .NET 3.5 website project?

  - by Aplato

  I'm trying to evaluate an expression stored in a database i.e. "if (Q1 ==2) {result = 3.1;} elseif (Q1 ==3){result=4.1;} else result = 5.9;" Rather than parsing it myself I'm trying to use the DLR. I'm using version .92 from the Codeplex repository and my solution is a .NET 3.5 website; and I'm having conflicts between the System.Core and Microsoft.Scripting.ExtenstionAttribute .dll's. Error = { Description: "'ExtensionAttribute' is ambiguous in the namespace 'System.Runtime.CompilerServices'.", File: "InternalXmlHelper.vb" } At this time I cannot upgrade to .NET 4.0 and make significant use of the .net 3.5 features (so downgrading is not an option). Any help greatly appreciated.

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• iPhone expired dev certs - public/private key pair issue

  - by KevinDTimm

  My dev 'license' expired last week, and with it my dev certs. I re-upped my license, but my keys are still expired. I tried to create a new signing certificate via keychain, etc. but it seems my private key is not enough, it needs my public key to do so. I understand that the public key is stored in the provisioning certificate. The question is, can I retrieve the public key from there? (And if so, how?)

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• How to enable camera feature in a sencha touch application using phonegap?

  - by Fabre

  I have developed one application in sencha touch2. I want to design a page in such a way that The page has a default image and one button below that. By clicking that button device camera should open(device mainly iPad and iPhone) and after capturing the image lets see it stored in a folder named as "capture" in your device. Then that captured image should replace that default image. I want to use Phonegap compulsorily. I have seen phone gap APIs for camera but I don't get it how to use it exactly. I am using MAC and Xcode for development.

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• How to send/open email attachments from android app?

  - by CSharperWithJava

  I would like to somehow send a file from my app on one android device to my app on another device. This can be done any which way, and I'm open to suggestions if you can tell me how to send over network or something like that. Currently, I'm looking at sending the file as an email attachment, but I haven't found any good documentation on how to do it. I need two things to accomplish this, be able to send my file (stored on sd card or somewhere on device) as an attachment, and have my app recognized by android as the app to open an attachment with the file extention (.lst). Any thoughts? The files will all be fairly small xml text files if that makes a difference.

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• ORM framework that extends base class with database-implementation.

  - by aioobe

  I have a game consisting of a client / server + a webpage. A central notion in both client and game-/webserver is an Account. Accounts are stored in a database thus I'm in need of some ORM and recently had a look at Hibernate and Cayenne. My understanding however, is that both frameworks provide an "DatabaseBackedAccount"-class which I extend with my other Account methods. My problem is that the Account class is reused heavily on the client side, and I would obviously not want to include database-related code on the client implementation. My current solution is to have an Account class (shared by server and client) and extend this with a DatabaseBackedAccount (overriding setter-methods and providing a commit method) on the server side. I find this quite natural and nice, however I've had to implement all gory sql-details and ORM myself. Is there any way to "turn the table" in any existing ORM framework, so that the generated classes extend my existing class?

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• Jar extraction and verification in BlackBerry

  - by Basilio

  Hi All, The application I am currently working on requires me to extract contents from and verify the authenticity of the signed jar that is stored on the SD Card. In Java [and Android], we have the java.util.jar and java.util.zip classes, that allow to extract jar. However, J2ME or BlackBerry® does not provide support for these packages. I have, however, successfully extracted these using the third party ZipMe library. Can anyone let me know, how to get the signature block from the .DSA/.RSA file to authenticate the jar? I have the certificate that was used to sign the jar as well. This is easily done in Java using the getCertificates() method available in java.util.jar.JarFile. Is there any 3rd party API available that emulates the JarFile for BlackBerry®? Any help in this regard will be deeply appreciated. Thanks & Regards Basilio John Vincent D'souza

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• asp.net webservice user management across pages

  - by nakori

  I'm developing a site that will display confidential readonly information, with data fetched from a WCF service. My question: What is the best approach to user management across different information pages. The service returns a collection with customer info after a secure login. My idea is to have a Customer object class that is stored in session. Is it possible to use things like HttpContext.Current.User.Identity.IsAuthenticated followed by HttpContext.Current.Session["UserId"] without using a database with role-based security? Would I be better off with a combination of local database, Linq to SQL or datasets rather than using just class objects for data fetched from service? thanks, nakori

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• Reading email content

  - by Steve

  Hi, Hope someone may be able to help. What i am looking to do is create a small winform app in c# to read the content of a email from a pop account, and upload key values to a sql automatically. The email format is always the same for each email, eg, First name : Last name : Phone number : etc... Currently the emails are being stored in a pop 3 account however i want a way to reduce having to key the information into the sql by hand. Can anyone advise how i would go about doing this or could recommend some guides? Thanks. Steve

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• Automatic logout in python web app

  - by Ali

  I have a web application in python wherein the user submits their email and password. These values are compared to values stored in a mysql database. If successful, the script generates a session id, stores it next to the email in the database and sets a cookie with the session id, with allows the user to interact with other parts of the sight. When the user clicks logout, the script erases the session id from the database and deletes the cookie. The cookie expires after 5 hours. My concern is that if the user doesnt log out, and the cookie expires, the script will force him to login, but if he has copied the session id from before, it can still be validated. How do i automatically delete the session id from the mysql database after 5 hours?

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