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• How did My Object Get into ASP.NET Page State?

  - by Paul Knopf

  I know what this error is, how to fix it, etc. My question is that I don't know why my current page I am developing is throwing this error when I am not using the foo class directly in any way, nor am I setting anything to the viewstate. I am using postbacks alot, but like I said, I am not storing anything in the viewstate etc one integer. I am using nhibernate if that is relevant. Any idea why I need to mark this classes as serializable that arent being used? Where should I start investigating? [SerializationException: Type 'FlexiCommerce.Persistence.NH.ContentPersister' in Assembly 'FlexiCommerce.Persistence.NH, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' is not marked as serializable.] System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers(RuntimeType type) +9434541 System.Runtime.Serialization.FormatterServices.GetSerializableMembers(Type type, StreamingContext context) +247 System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitMemberInfo() +160 System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter, SerializationBinder binder) +218 System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Write(WriteObjectInfo objectInfo, NameInfo memberNameInfo, NameInfo typeNameInfo) +388 System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize(Object graph, Header[] inHeaders, __BinaryWriter serWriter, Boolean fCheck) +444 System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph, Header[] headers, Boolean fCheck) +133 System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph) +13 System.Web.UI.ObjectStateFormatter.SerializeValue(SerializerBinaryWriter writer, Object value) +2937 [ArgumentException: Error serializing value 'Music#2' of type 'FlexiCommerce.Components.Category.'] System.Web.UI.ObjectStateFormatter.SerializeValue(SerializerBinaryWriter writer, Object value) +3252 System.Web.UI.ObjectStateFormatter.SerializeValue(SerializerBinaryWriter writer, Object value) +2276 [ArgumentException: Error serializing value 'System.Object[]' of type 'System.Object[].'] System.Web.UI.ObjectStateFormatter.SerializeValue(SerializerBinaryWriter writer, Object value) +3252 System.Web.UI.ObjectStateFormatter.Serialize(Stream outputStream, Object stateGraph) +116 System.Web.UI.ObjectStateFormatter.Serialize(Object stateGraph) +57 System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Serialize(Object state) +4 System.Web.UI.Util.SerializeWithAssert(IStateFormatter formatter, Object stateGraph) +37 System.Web.UI.HiddenFieldPageStatePersister.Save() +79 System.Web.UI.Page.SavePageStateToPersistenceMedium(Object state) +108 System.Web.UI.Page.SaveAllState() +315 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2492

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• Python what's the data structure for triple data

  - by Paul

  I've got a set of data that has three attributes, say A, B, and C, where A is kind of the index (i.e., A is used to look up the other two attributes.) What would be the best data structure for such data? I used two dictionaries, with A as the index of each. However, there's key errors when the query to the data doesn't match any instance of A.

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• Very Different Execution Times of SQL Query in C# and SQL Server Management Studio

  - by Paul

  I have a simple SQL query that when run from C# takes over 30 seconds then times-out every time, whereas when run on SQL Server Management Studio successfully completes instantly. In the latter case, a query execution plan reveals nothing troubling, and the execution time is spread nicely through a few simple operations. I've run 'EXEC sp_who2' while the query is running from C#, and it is listed as taking 29,000 milliseconds of CPU time, and is not blocked by anything. I have no idea how to begin solving this. Does anyone have some insight? The query is: SELECT c.lngId, ... FROM tblCase c INNER JOIN tblCaseStatus s ON s.lngId = c.lngId INNER JOIN tblCaseStatusType t ON t.lngId = s.lngId INNER JOIN [Another Database]..tblCompany cm ON cm.lngId = cs.lngCompanyId WHERE t.lngId = 25 AND c.IsDeleted = 0 AND s.lngStatus = 1

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• Image in Image Algorithm

  - by Paul

  I need an algorithm written in any language to find an image inside of an image, including at different scales. Does anyone know a starting point to solving a problem like this? For example: I have an image of 800x600 and in that image is a yellow ball measuring 180 pixels in circumference. I need to be able to find this image with a search pattern of a yellow ball having a circumference of 15 pixels. Thanks

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• JPA CascadeType.ALL does not delete orphans.

  - by Paul Whelan

  I am having trouble deleting orphan nodes using JPA with the following mapping @OneToMany (cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "owner") private List<Bikes> bikes; I am having the issue of the orphaned roles hanging around the database. I can use the @org.hibernate.annotations.Cascade Hibernate specific tag but obviously I don't want to tie my solution into a hibernate implementation. Any pointers greatly appreciated.

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• How to provide translations for items in a ASP.Net custom web control (.ascx)?

  - by paul

  How do I go about providing localised text for items in a custom web control? I had thought that I just need to add meta.resourcekey tags to the control items and then define and fill some resource files called mycontrol.ascx.[lang].resx but that doesn't seem to work. e.g. MyControl.ascx <asp:Label ID="Label1" meta:resourcekey="Label1" runat="server" Text="Oops!"></asp:Label> MyControl.ascx.de.resx Label1.Text Donner und Blitzen!

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• How to zoom image on mouseover at some XY coordinate?

  - by Paul

  I display set of images(small). I need to show the larger image(300*300) at some XY co-ordinate when mouseover event occurs on an image while mousout larger image has to disappear . Please give some solution.

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• Reduce durability in MySQL for performance

  - by Paul Prescod

  My site occasionally has fairly predictable bursts of traffic that increase the throughput by 100 times more than normal. For example, we are going to be featured on a television show, and I expect in the hour after the show, I'll get more than 100 times more traffic than normal. My understanding is that MySQL (InnoDB) generally keeps my data in a bunch of different places: RAM Buffers commitlog binary log actual tables All of the above places on my DB slave This is too much "durability" given that I'm on an EC2 node and most of the stuff goes across the same network pipe (file systems are network attached). Plus the drives are just slow. The data is not high value and I'd rather take a small chance of a few minutes of data loss rather than have a high probability of an outage when the crowd arrives. During these traffic bursts I would like to do all of that I/O only if I can afford it. I'd like to just keep as much in RAM as possible (I have a fair chunk of RAM compared to the data size that would be touched over an hour). If buffers get scarce, or the I/O channel is not too overloaded, then sure, I'd like things to go to the commitlog or binary log to be sent to the slave. If, and only if, the I/O channel is not overloaded, I'd like to write back to the actual tables. In other words, I'd like MySQL/InnoDB to use a "write back" cache algorithm rather than a "write through" cache algorithm. Can I convince it to do that? If this is not possible, I am interested in general MySQL write-performance optimization tips. Most of the docs are about optimizing read performance, but when I get a crowd of users, I am creating accounts for all of them, so that's a write-heavy workload.

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• Should Java raw types be deprecated?

  - by Paul Croarkin

  Should a future release of Java deprecate the use of raw types to force the migration to generics? I could also see having raw types not allowed by default but allowing them via a compile flag for legacy code.

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• Matlab time stamps reading

  - by Paul

  Any easy way to read all the columns in Matlab? my format is date time y1 y2 y3 y4 ......................... 4/27/2010 00:3:09 34 45 45 56 ................ so on currently i am reading these with the code [c,pathc]=uigetfile({'*.txt'},'Select the data','C:\Data'); file=[pathc c]; data= dlmread(file, ',', 1,3); so needless to say i am skipping the time stamps. Was wondering if there is aeasy way to read the time stamps and plot my other colums agianst the time in hours. my files are 43200 X 30 and some are 86400 X 90 Related question : is the format same for .csv and .xls files , i mean except ofcourse xlsread

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• [C++] Real time plotting/data logging

  - by Paul

  I'm going to write a program that plots data from a sensor connected to the computer. The sensor value is going to be plotted as a function of the time (sensor value on the y-axis, time on the x-axis). I want to be able to add new values to the plot in real time. What would be best to do this with in C++? Edit: And by the way, the program will be running on a Linux machine

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• How to count the advertisement hits and stores it in database

  - by Paul

  We put our website advertisement in 2 other websites. We need to count the hits we are getting form those advertisement and like to store it in my database. Please give me an idea to do that.

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• OpenSocial and its usages

  - by Paul Knopf

  I have looked for some explanation on the exact usages for the set of standards known as OpenSocial. I need some clarification if I can use OpenSocial like the following. I would like to create one library used to community with an OpenSocial api for use in my website that will not 'behave' like an application described by common sites like facebook and myspace. I'm not making a myspace of facebook application, I'm creating my own website and I want users to be able to find friends. I would like to allow users to store usernames and passwords for various OpenSocial-supported social networks. I would also like to use the api to sync events from my web site to their specified social network. I would also like to allow my users to view a list of friends and invite them. Is it possible to create one library that supports OpenSocial and simple "point" to and social network that supports it to get a list of friends and etc?

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• .NET Reflection Helper API?

  - by Paul Kohler

  When using reflection we typically just was the basic System.Reflection API but I am wondering if anyone know of a nice "wrapper" layer or API that has a more "schema style" approach? (e.g. kind of like a code generators DB schema view)

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• What character encoding should I use for a web page containing mostly Arabic text? Is utf-8 okay?

  - by Paul D. Waite

  What character encoding should I use for a web page containing mostly Arabic text? Is utf-8 okay?

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• MPMoviePlayerController stutter

  - by Paul

  Code : NSString *path = [[NSBundle mainBundle] pathForResource:@"sample" ofType:@"m4v"]; MPMoviePlayerController *video = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:path]]; [video setBackgroundColor:[UIColor blackColor]]; video.scalingMode = MPMovieScalingModeAspectFill; [[ NSNotificationCenter defaultCenter ] addObserver: self selector: @selector(movieFinishedCallback:) name: MPMoviePlayerPlaybackDidFinishNotification object: aVideo ]; [video play]; ....movieFinishedCallback... [video release]; Result : Movie starts at frame 10 and then resets to frame 0, creating a stutter effect... Any Ideas ?

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• Good File Organization Suggestions for Developer

  - by Paul

  I am struggling a little with folder organization to organize the many projects that I work on. I work on OS X - right now I am using ~/Development/ as the root folder, and I have many types of projects. For example, I have my iPhone apps under ~/Development/Xcode I develop in many languages, from PHP, to Ruby, to Python, to Objective-C. So, for example, I might have a couple of open-source apps based on PHP where I am using the Zend framework. Some of these projects are for clients, others are tests/experiments when learning a new language or general experimenting. I am really interested in how other developers have organized code/projects and could pass along some advice to make it very easy to navigate through code/projects related to many languages and types of projects.

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• Are the outputs of javascript parsers of different browsers the same?

  - by Paul

  Suppose there is a piece of JavaScript code that is supported by different browsers, for example IE and Firefox. Would the JavaScript parsers of the different browsers generate the same output (i.e., the same AST)?

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• How to retrieve the currently searched for text in vim?

  - by Paul Wicks

  For example, I have some code and I use "*" to search for something within that code. Not finding what I want in that file, I'd like to use something like ack or grep to search for it within the local directory. I know I can do :! ack whatever to do the search from within vim, but what I'd like to know is is there a way to replace whatever with the currently searched for word within vim.

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• SQL Server JOIN with optional NULL values

  - by Paul McLoughlin

  Imagine that we have two tables as follows: Trades ( TradeRef INT NOT NULL, TradeStatus INT NOT NULL, Broker INT NOT NULL, Country VARCHAR(3) NOT NULL ) CTMBroker ( Broker INT NOT NULL, Country VARCHAR(3) NULL ) (These have been simplified for the purpose of this example). Now, if we wish to join these two tables on the Broker column, and if a country exists in the CTMBroker table on the Country, we have the following two choices: SELECT T.TradeRef,T.TradeStatus FROM Trades AS T JOIN CTMBroker AS B ON B.Broker=T.Broker AND ISNULL(B.Country, T.Country) = T.Country or SELECT T.TradeRef,T.TradeStatus FROM Trades AS T JOIN CTMBroker AS B ON B.Broker=T.Broker AND (B.COUNTRY=T.Country OR B.Country IS NULL) These are both logically equivalent, however in this specific circumstance for our database (SQL Server 2008, SP1) two different execution plans are produced for these two queries with the second version significantly outperforming the first version in terms of both time and logical reads. My question really is as follows: as a general rule would (2) be preferred to (1), or does this just happen to be exploiting some particular idiosyncracy of the optimiser in 2008 SP1 (that could therefore change with future versions of SQL Server).

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• Is there a .Net library similar to GNU readline?

  - by paul.moore.name

  I'm considering writing a console application in C# and I want to incorporate history, completion and command line editing features something like GNU readline (but not necessarily as extensive as that!) Is there an existing library for .net which provides this type of functionality? I guess one option would be to use interop services to call GNU readline. But is there a native option?

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• How do I create and read non-global variables that aren't destroyed at end of function?

  - by Paul Reilly

  I am attempting to code some plugins to use with MIDI sequencers but have hit a stumbling block. I can't use global-scope variables to store information because multiple instances of the .dll can exist which share memory. How do I create a class (for re-usability purposes in other plugins) containing 2 dimensional array and other variables the content of which is to be shared between functions? If that is possible, how would I read and write the data from the function in the framework where I do the processing?

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• Is there any rich text editor component for JSF RI ?

  - by Paul

  1.I am using JSF RI 1.1. How to add rich text editor component. pls tell me is there any rich text editor component available. 2. i am displaying set of images horizontally using the below code. selected image is stored in database. while showing the images in edit mode how to highlight the previously selected image. pls help me

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• How update dataset with datagrid view C#

  - by Paul

  I am beginner and I have this problem. How can I can update dataset with datagridview? I binding dataset in datagrid. Edit datagrid. At finish I want update dataset with datagridview. Thank you form any advice Sory, I use Winforms. Example: I bind dataset in datagridview. dataGridViewCustomers.DataSource = _ds.Tables[0]; //edit datagridview //on this place I want update dataset with datagrid view

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• MATLAB: svds() not converging

  - by Paul

  So using MATLAB's svds() function on some input data as such: [U, S, V, flag] = svds(data, nSVDs, 'L') I noticed that from run to run with the same data, I'd get drastically different output SVD sizes from run to run. When I checked whether 'flag' was set, I found that it was, indicating that the SVDs had not converged. My normal system here would be that if it really needs to converge, I'd do something like this: flag = 1 svdOpts = struct('tol', 1e-10, 'maxit', 600, 'disp', 0); while flag: if svdOpts.maxit > 1e6 error('There''s a real problem here.') end [U, S, V, flag] = svds(data, nSVDs, 'L', svdOpts) svdOpts.maxit = svdOpts.maxit*2 end But from what I can tell, when you use 'L' as the third argument, the fourth argument is ignored, meaning I just have to deal with the fact that it's not converging? I'm not even really sure how to use the 'sigma' argument in place of the 'L' argument. I've also tried reducing the number of SVDs calculated to no avail. Any help on this matter would be much appreciated. EDIT While following up on the comments below, I found that the problem had to do with the way I was building my data matrices. Turned out I had accidentally inverted a matrix and had an input of size (4000x1) rather than (20x200), which was what was refusing to converge. I also did some more timing tets and found that the fourth argument was not, in fact, being ignored, so that's on me. Thanks for the help guys.

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