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• How to Commit Cell Edit Upon Leaving Cell

  - by BSalita

  I'm using a matrix DataTable bound to a DataGrid. Cell edits aren't committed to the DataTable until a different row is clicked. How can I commit changes when any cell gets focus?

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• How to I serialize a large graph of .NET object into a SQL Server BLOB without creating a large bu

  - by Ian Ringrose

  We have code like: ms = New IO.MemoryStream bin = New System.Runtime.Serialization.Formatters.Binary.BinaryFormatter bin.Serialize(ms, largeGraphOfObjects) dataToSaveToDatabase = ms.ToArray() // put dataToSaveToDatabase in a Sql server BLOB But the memory steam allocates a large buffer from the large memory heap that is giving us problems. So how can we stream the data without needing enough free memory to hold the serialized objects. I am looking for a way to get a Stream from SQL server that can then be passed to bin.Serialize() so avoiding keeping all the data in my processes memory. Likewise for reading the data back... Some more background. This is part of a complex numerical processing system that processes data in near real time looking for equipment problems etc, the serialization is done to allow a restart when there is a problem with data quality from a data feed etc. (We store the data feeds and can rerun them after the operator has edited out bad values.) Therefore we serialize the object a lot more often then we de-serialize them. The objects we are serializing include very large arrays mostly of doubles as well as a lot of small “more normal” objects. We are pushing the memory limit on a 32 bit system and make the garage collector work very hard. (Effects are being made elsewhere in the system to improve this, e.g. reusing large arrays rather then create new arrays.) Often the serialization of the state is the last straw that courses an out of memory exception; our peak memory usage is while this serialization is being done. I think we get large memory pool fragmentation when we de-serialize the object, I expect there are also other problem with large memory pool fragmentation given the size of the arrays. (This has not yet been investigated, as the person that first looked at this is a numerical processing expert, not a memory management expert.) Are customers use a mix of Sql Server 2000, 2005 and 2008 and we would rather not have different code paths for each version of Sql Server if possible. We can have many active models at a time (in different process, across many machines), each model can have many saved states. Hence the saved state is stored in a database blob rather then a file. As the spread of saving the state is important, I would rather not serialize the object to a file, and then put the file in a BLOB one block at a time. Other related questions I have asked How to Stream data from/to SQL Server BLOB fields? Is there a SqlFileStream like class that works with Sql Server 2005?

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• How to output two ddl files at the same time with using maven hbm2ddl plugin

  - by daniel-cai

  Our application needs to use two different kinds of databases.One is oracle, the other is mysql and we want to use maven plugin hbm2ddl to generate the ddl file, and want to output the two ddl files at the same time, I don't know how to set the configuration in pom.xml. I tried to use this plugin twice, but it always generated one ddl file. Any one encountered such case before ? could u please give some advice.

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• Loading .brl rules into rulebase

  - by fma

  Hi, I am using a dsl to create business rules (.brl rules). How can I load the .brl rules into my knowledge base? How can I convert from a .brl file to a .dslr file??? I am unable to find any help on this. Or is there a different way to load brl files?? Please help. Thank you FMa

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• Difference between Geek and Ninja [closed]

  - by saturngod

  I found many books and many website about ninja, Novice to Ninja Books, PHPNinja, JqueryNinja, etc. I want to know What is Geek Developer ? What is Ninja Developer ? Different Between Geek and Ninja ?

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• Instantiating multiple beans of the same class with Spring annotations

  - by Francois

  With an XML configured Spring bean factory, I can easily instantiate multiple instances of the same class with different parameters. How can I do the same with annotations? I would like something like this: @Component(firstName=”joe”, lastName=”smith) @Component(firstName=”mary”, lastName=”Williams”) public class Person { /* blah blah */ }

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• Would someone mind giving suggestions for this new assembly language?

  - by Noctis Skytower

  Greetings! Last semester in college, my teacher in the Computer Languages class taught us the esoteric language named Whitespace. In the interest of learning the language better with a very busy schedule (midterms), I wrote an interpreter and assembler in Python. An assembly language was designed to facilitate writing programs easily, and a sample program was written with the given assembly mnemonics. Now that it is summer, a new project has begun with the objective being to rewrite the interpreter and assembler for Whitespace 0.3, with further developments coming afterwards. Since there is so much extra time than before to work on its design, you are presented here with an outline that provides a revised set of mnemonics for the assembly language. This post is marked as a wiki for their discussion. Have you ever had any experience with assembly languages in the past? Were there some instructions that you thought should have been renamed to something different? Did you find yourself thinking outside the box and with a different paradigm than in which the mnemonics were named? If you can answer yes to any of those questions, you are most welcome here. Subjective answers are appreciated! hold N Push the number onto the stack copy Duplicate the top item on the stack copy N Copy the nth item on the stack (given by the argument) onto the top of the stack swap Swap the top two items on the stack drop Discard the top item on the stack drop N Slide n items off the stack, keeping the top item add Addition sub Subtraction mul Multiplication div Integer Division mod Modulo save Store load Retrieve L: Mark a location in the program call L Call a subroutine goto L Jump unconditionally to a label if=0 L Jump to a label if the top of the stack is zero if<0 L Jump to a label if the top of the stack is negative return End a subroutine and transfer control back to the caller exit End the program print chr Output the character at the top of the stack print int Output the number at the top of the stack input chr Read a character and place it in the location given by the top of the stack input int Read a number and place it in the location given by the top of the stack Question: How would you redesign, rewrite, or rename the previous mnemonics and for what reasons?

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• How can I model the data in a multi-language data editor in WPF with MVVM?

  - by Patrick Szalapski

  Are there any good practices to follow when designing a model/ViewModel to represent data in an app that will view/edit that data in multiple languages? Our top-level class--let's call it Course--contains several collection properties, say Books and TopicsCovered, which each might have a collection property among its data. For example, the data needs to represent course1.Books.First().Title in different languages, and course1.TopicsCovered.First().Name in different languages. We want a app that can edit any of the data for one given course in any of the available languages--as well as edit non-language-specific data, perhaps the Author of a Book (i.e. course1.Books.First().Author). We are having trouble figuring out how best to set up the model to enable binding in the XAML view. For example, do we replace (in the single-language model) each String with a collection of LanguageSpecificString instances? So to get the author in the current language: course1.Books.First().Author.Where(Function(a) a.Language = CurrentLanguage).SingleOrDefault If we do that, we cannot easily bind to any value in one given language, only to the collection of language values such as in an ItemsControl. <TextBox Text={Binding Author.???} /> <!-- no way to bind to the current language author --> Do we replace the top-level Course class with a collection of language-specific Courses? So to get the author in the current language: course1.GetLanguage(CurrentLanguage).Books.First.Author If we do that, we can only easily work with one language at a time; we might want a view to show one language and let the user edit the other. <TextBox Text={Binding Author} /> <!-- good --> <TextBlock Text={Binding ??? } /> <!-- no way to bind to the other language author --> Also, that has the disadvantage of not representing language-neutral data as such; every property (such as Author) would seem to be in multiple languages. Even non-string properties would be in multiple languages. Is there an option in between those two? Is there another way that we aren't thinking of? I realize this is somewhat vague, but it would seem to be a somewhat common problem to design for. Note: This is not a question about providing a multilingual UI, but rather about actually editing multi-language data in a flexible way.

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• rsh connection from Linux to HP times out.

  - by kadeshpa

  I added Linux boxes to /etc/hosts.equiv and .rhosts file for rsh connectivity to HP box. I am able to do rsh as root from Linux to HP. But if I run in a root shell as different user connection times out. Any reason?

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• new form in portlet

  - by srinath

  Hi, How to redirect to new different form page in Grails portlets . When click on "New User" it should show new.gsp (here). but this is not happening and always redirects to view.gsp . I'm using like this in view.gsp : a href="${portletResponse.createActionURL()}" name="new_user" id="new_user"New User please suggest me .

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• Detect URL and Download content from it

  - by Veejay

  I have a page 'PageA' that has around 20 links on it. Each link leads to a different page. How can I access all the links on PageA programmatically and then download each of the pages(20) as .mht? Also is there any existing app that does that?

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• When using delegates, need better way to do sequential processing

  - by Padawan

  I have a class WebServiceCaller that uses NSURLConnection to make asynchronous calls to a web service. The class provides a delegate property and when the web service call is done, it calls a method webServiceDoneWithXXX on the delegate. There are several web service methods that can be called, two of which are say GetSummary and GetList. The classes that use WebServiceCaller initially need both the summary and list so they are written like this: -(void)getAllData { [webServiceCaller getSummary]; } -(void)webServiceDoneWithGetSummary { [webServiceCaller getList]; } -(void)webServiceDoneWithGetList { ... } This works but there are at least two problems: The calls are split across delegate methods so it's hard to see the sequence at a glance but more important it's hard to control or modify the sequence. Sometimes I want to call just GetSummary and not also GetList so I would then have to use an ugly class-level state variable that tells webServiceDoneWithGetSummary whether to call GetList or not. Assume that GetList cannot be done until GetSummary completes and returns some data which is used as input to GetList. Is there a better way to handle this and still get asynchronous calls? Update based on Matt Long's answer: Using notifications instead of a delegate, it looks like I can solve problem #2 by setting a different selector depending on whether I want the full sequence (GetSummary+GetList) or just GetSummary. Both observers would still use the same notification name when calling GetSummary. I would have to write two separate methods to handle GetSummaryDone instead of using a single delegate method (where I would have needed some class-level variable to tell whether to then call GetList). -(void)getAllData { [[NSNotificationCenter defaultCenter] addObserver:self              selector:@selector(getSummaryDoneAndCallGetList:)                  name:kGetSummaryDidFinish object:nil];     [webServiceCaller getSummary]; } -(void)getSummaryDoneAndCallGetList { [NSNotificationCenter removeObserver] //process summary data [[NSNotificationCenter defaultCenter] addObserver:self              selector:@selector(getListDone:)                  name:kGetListDidFinish object:nil];     [webServiceCaller getList]; } -(void)getListDone { [NSNotificationCenter removeObserver] //process list data } -(void)getJustSummaryData { [[NSNotificationCenter defaultCenter] addObserver:self              selector:@selector(getJustSummaryDone:) //different selector but                  name:kGetSummaryDidFinish object:nil]; //same notification name     [webServiceCaller getSummary]; } -(void)getJustSummaryDone { [NSNotificationCenter removeObserver] //process summary data } I haven't actually tried this yet. It seems better than having state variables and if-then statements but you have to write more methods. I still don't see a solution for problem 1.

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• Specification Pattern vs Spec in BDD

  - by cadmium

  I'm trying to explore Behavior Driven Design and Domain Driven Design. I'm getting that written specifications drive the tests in BDD, but also that business logic can be encapsulated using the specification pattern for re-use in domain objects and repositories, etc. Are these basically the same concept just used in different ways, used in conjunction together, or am I completely confusing the concepts? Please shed some light, if possible.

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• How long can a URL be?

  - by Spines

  How long can a URL be? I want to pass a lot of data through the query string. I think I remember that it depends on what different routers it passes through, but how long can the URL be and definitely not get truncated?

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• How to fill byte array with junk?

  - by flyout

  I am using this: byte[] buffer = new byte[10240]; As I understand this initialize the buffer array of 10kb filled with 0s. Whats the fastest way to fill this array (or initialize it) with junk data every time? I need to use that array like 5000 times and fill it every time with different junk data, that's why I am looking for a fast method to do it. The array size will also have to change every time.

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• Modifying Export to Excel in ReportViewer

  - by firedrawndagger

  I have a formatted table in ReportViewer. When I want to export to Excel though - I do not want to export the formatted table - instead I want to output the original/raw/unmassaged data table in an excel file. What's the best way to intercept the Export to Excel function and output data in a different format?

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• Alpha-Beta cutoff

  - by Becky

  I understand the basics of this search, however the beta cut-off part is confusing me, when beta <= value of alphabeta I can either return beta, break, or continue the loop. return beta doesn't seem to work properly at all, it returns the wrong players move for a different state of the board (further into the search tree) break seems to work correctly, it is very fast but it seems a bit TOO fast continue is a lot slower than break but it seems more correct...I'm guessing this is the right way but pseudocode on google all use 'break' but because this is pseudocode I'm not sure what they mean by 'break'

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• Generate money type fields using code first EF CTP5

  - by BBHorus

  In this blog post: EF4 Code First Control Unicode and Decimal Precision, Scale with Attributes, Dane Morgridge used attributes to control the creation of different types on your database. ...And I found this pretty unique BTW!!! How do I generate money type fields in my resulting database using code first API of EF CTP5, if is possible to do it from your model, using conventions or attributes? Sorry about my English is not my main language. Thanks in advance.

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• Comparing Ranges in Excel

  - by mcoolbeth

  In the Excel Interop libraries, is there functionality to determine whether a given Range object is contained within another Range object? It would be simple enough for me to compare the row and column indices of each Range, but things become more complicated when you want to compare two ranges that may be on different worksheets.

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• Why is RAISERROR misspelled? Or is it not?

  - by Jason

  Why isn't RAISERROR spelled RAISEERROR? Where is the second E? I could understand if it were some ancient keyword length constraint, but I wouldn't expect it to be a nine-character limit. Is RAIS or RROR a technical word such that "raise-error" is just a mis-reading? Are its (immediate) origins in a different language? I've searched Google but not finding much on the subject.

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• Cross developping targetting both Java Swing and GWT

  - by WizardOfOdds

  Does anyone know of any tool that can facilitate/ease porting of an app to both Java Swing and GWT? I've got a few "screens" that makes complete sense to have both in a desktop app and in a browser and I was wondering if there was some kind of common API that could be targetted that would facilitate creating these two different "views" (see my comment)?

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• Do any clouds support SSD storage?

  - by taw

  I'm using Amazon cloud right now, and the biggest performance issue is horrible I/O performance. As long as something fits RAM it's fine - once it's too big it gets ridiculously slow (in many different scenarios). There are only so many ways one can avoid hitting disk - so the question is - does Amazon or some other cloud provide SSD option?

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• Using JBoss DROOLS XMLDumper with .dslr file

  - by Jack Smith

  I have a .dslr file consiting of a rule(dslr) and a dsl file. I need to get the XML output of the DRL from this dslr. I've tried different ways with the XMLDumper but cannot get it to work. Any ideas?

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• Per directory read/write permissions in Mercurial

  - by pako

  I would like to convert my Subversion repository to Mercurial. I have a pretty big web project divided into many different folders. In Subversion I was able to set per directory permissions for a repository. For example, I could say that a new developer could only read and write a subset of all the project's directories. Is it possible to have a similar setup in a single Mercurial repository?

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• Sparx Enterprise Architect for SQL Server modeling?

  - by Tone

  I have used MS SQL Server Management Studio for most of my database modeling to this point in my career. I am a database developer (not a DBA), but interested in the benefits with using Sparx systems Enterprise Architect for data modeling. I do not have the need to generate scripts for different databases, other than that what does using Sparx EA buy me that SQL Management Studio does not?

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