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• Excel VBA: Sum invoice by client id with copying result to new worksheet

  - by Melkior

  Hi, i have strange problem doing reporting: i have numerous clients with different issued invoices. Problem comes to the point when there are invoices in minus and plus: Column A consists of client unique IDs, Column B invoice number, column C invoice amount A | B | C 0010019991 | 1800149471 | 162.00 | 2010-03-12 0010019991 | 1800136388 | 162.00 | 2010-02-12 0010019991 | 1600008004 | -36.00 | 2010-03-15 0010021791 | 1800132148 | 162.00 | 2010-03-12 0010021791 | 1800145436 | 162.00 | 2010-02-12 0010021791 | 1600007737 | -12.00 | 2010-03-15 0014066147 | 1800119068 | 1,684.80 | 2010-03-12 0014066147 | 1800123702 | 1,684.80 | 2010-02-12 0014066147 | 1600007980 | -1,300.80 | 2010-02-15 0014066147 | 1600007719 | -1,286.40 | 2010-03-15 I need to remove rows with negative invoices in a way that amount is summed with invoices which are not with negative amount. So that final result would look like: A | B | C | D 0010019991 | 1800149471 | 126.00 | 2010-03-12 0010019991 | 1800136388 | 162.00 | 2010-02-12 0010021791 | 1800132148 | 150.00 | 2010-03-12 0010021791 | 1800145436 | 162.00 | 2010-02-12 0014066147 | 1800123702 | 782.40 | 2010-02-12

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• WCF configuration setting information at a glance

  - by Newbie

  Is there any site from where I can get the most of the information about WCF configuration settings e.g. keyEntropyMode,maxStatefulNegotiations,sessionKeyRolloverInterval, negotiationTimeout etc. I have started recently working in wcf but is facing many troubles in understanding the terms. There are to be honest huge. And whenever I get stuck, it takes a long time for me to solve it (searching and searching in google and after spending sometime hours I may get the solution). Henceforth, I think it is better to know if not all astleast some of the terms and their usage and what they means. It would be great help if anyone can point such a link. I searched in the net with " wcf configuration file elements" but with not much luck. Thanks

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• BackgroundWorker RunWorkerCompleted in a Component

  - by Sphynx

  I'm familiar with the following: "If the operation raises an exception that your code does not handle, the BackgroundWorker catches the exception and passes it into the RunWorkerCompleted event handler, where it is exposed as the Error property of System.ComponentModel.RunWorkerCompletedEventArgs. If you are running under the Visual Studio debugger, the debugger will break at the point in the DoWork event handler where the unhandled exception was raised." However, I've encountered a weird glitch. In my component, there's an instance of BackgroundWorker. Even though it's not running in the debugger, the exception remains unhandled by the worker. Even simplified code produces an unhandled exception (and RunWorkerCompleted doesn't fire): Throw New ArgumentException("Test") The main thing is the code of RunWorkerComplete: RaiseEvent UpdateComplete(Me, New AsyncCompletedEventArgs(e.Error, e.Cancelled, e.Result)) I need the component to expose the worker exception through a public event. If I remove the RaiseEvent call, the exception becomes handled by the worker, and accessible through e.Error. Apparently, raising an event causes the worker to miss the exception. How can that be?

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• Why do we use HTTP and not remote invocations?

  - by BrokenClockwork

  Hey, first of all this is a conceptional question and I do not know if StackOverflow is the appropriate place - so my apologies if I am wrong. Nowadays the web is not only used for passing raw informations. Many and especially complex web applications are in use. These web application seem to be so complex that it seems irrational to use the HTTP protocol, which is based on so simple data exchange, plus it is stateless. Would it not be more convincing to use remote invocations for this web applications? The big advantage to my mind is a unified GUI by using HTML. But there are applications, which have no need for a graphical interfaces and then it comes to a point where the HTTP protocol is really cumbersome.

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• Debuging to simulator crashes with "exited with status 5" unless I debug

  - by tigermain

  For some reason the app I am working on has very bad PMT! Literally! Most of the time I cannot debug using the simulator without putting a breakpoint in my AppDelegate. If I don't it exists with "status 5". If I put a break point in and simple continue it works perfectly well, it also works if I run the app in the simulator when not connected to the GDB. I have tried the source on a second machine with exactly the same results. I dont have this issue building to the device?!?!?! Thanks

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• What is the difference between File and FileInfo in C# ?

  - by Lilitu88

  I've been reading that the static methods of the File Class are better used to perform small and few tasks on a file like checking to see if it exists and that we should use an instance of the FileInfo Class if we are going to perform many operations on a specific file. I understand this and can simply use it that way blindly but I would like to know why is there a difference ? What is it about the way they work that make them suitable for different situations ? What is the point of having this 2 different classes that seem do the same in different ways ? It would be helpful if someone could answer at least one of this questions.

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• Mapping Hilbert values to 3D points

  - by Alexander Gladysh

  I have a set of Hilbert values (length from the start of the Hilbert curve to the given point). What is the best way to convert these values to 3D points? Original Hilbert curve was not in 3D, so I guess I have to pick by myself the Hilbert curve rank I need. I do have total curve length though (that is, the maximum value in the set). Perhaps there is an existing implementation? Some library that would allow me to work with Hilbert curve / values? Language does not matter much.

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• Ruby Equivalent of Python Requests Library (HTTP Client)

  - by Hartator

  There is a library in python that I love called requests. requests is a http client build on urllib3, top-notch :) (http://docs.python-requests.org/en/latest/) I am looking for something similar in ruby, basically what I need is : Upload files support (multipart/form-data) Easy get/post Cookies can be passed from a response object to a request object (build manually login script) Stable and Flexible Sessions support (to not have to handle cookies manually if we don't have too) I've looked at Typhoeus, but the code example in the home page doesn't work (they have moved code along and the get method is not longer directly accessible like that), so it's not starting well! :) Curb seems nice and I like curl, there is alson RestClient which seems popular and em-http seems pretty fast according to benchmark. There is a aso Patron and CurlFu which I haven't have the time to try. And of course Net:Http. But it doesn't seems to have a main stream solution that everyone point. I think a lot of people have been in my situation and I wonder what they have choosen and why?

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• Why Shouldn't I Programmatically Submit Username/Password to Facebook/Twitter/Amazon/etc?

  - by viatropos

  I wish there was a central, fully customizable, open source, universal login system that allowed you to login and manage all of your online accounts (maybe there is?)... I just found RPXNow today after starting to build a Sinatra app to login to Google, Facebook, Twitter, Amazon, OpenID, and EventBrite, and it looks like it might save some time. But I keep wondering, not being an authentication guru, why couldn't I just have a sleek login page saying "Enter username and password, and check your login service", and then in the background either scrape the login page from say EventBrite and programmatically submit the form with Mechanize, or use an API if there was one? It would be so much cleaner and such a better user experience if they didn't have to go through popups and redirects and they could use any previously existing accounts. My question is: What are the reasons why I shouldn't do something like that? I don't know much about the serious details of cookies/sessions/security, so if you could be descriptive or point me to some helpful links that would be awesome. Thanks!

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• Maven "Module" vs "Project" (Eclipse, m2eclipse plugin)

  - by Ricket

  I'm a beginner at Maven and I've played with it from a command line point of view a little, so now I was trying to use it in Eclipse; I installed the m2eclipse plugin to do so. But I'm stumped from the very beginning! Apparently I've missed a bit of terminology somewhere along the line. I can't keep track of all these new Maven terms... What is a Maven Project, and what is a Maven Module? These are my options when creating a new project in the Maven category in Eclipse.

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• run-time error '429' activex component can't create object

  - by kojof

  I've created a simple application .Net Class that converts an excel spreadsheet into a a pdf file. I then get a Excel 2007 application to call this dll which works fine on my development machine. However when i deploy it on to a machine that has both the .net framework and excel 2007, i get this error - run-time error '429' activex component can't create object when i try and register the tlb or the dll , i get error below. the module c:\temp\test\Printlibarary.dll2 was loaded but the entry-point dllregisterserver was not found. Make sure that ...... is a valid dll or ocx file and then try again. Can someone please help me to resolve this.

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• asp.net application install folder

  - by Maximilian Csuk

  Disclaimer: this is not a question about how to install asp.net or an application using it! Hi! I am pretty sure many of you have once installed some kind of forum, blog or CMS (mostly PHP powered applications). All of these contain a folder mostly named "install" where (after you copied the files to the webserver) point your browser to to complete the installation by entering for example database information (servername, username, password, ...). After that, most applications suggest that you delete this folder or at least change the permissions so nobody from the outside can access it anymore. Now to my question: how would you go about that in the asp.net world? I don't really like the "install folder"-approach and I thought there might be a different mechanism for .net/IIS. The person installing my application should be able to enter his database information as painless as possible, which should ultimatively be stored in the web.config file. If it makes a difference, I am using asp.net MVC. Thanks for your help!

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• I want to query whitepages.com 4,000 times, how to save the results?

  - by John Corbin

  I have an old customer list of 4,000 businesses. I want to determine if the phone numbers associated with each listing are still working (and therefore the business is probably still open). I can put each number in whitepages.com and check them one by one... but want to automate the results. I have looked at their API and can't digest it. I can form the correct query URL, but trying things like cURL -O doesn't work. I have access to Mac tools, Unix tools, and could try various javascript stuff if anyone could point me in the right direction... would even pay. Help? Thx

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• Java object caching, which is faster, reading from a file or from a remote machine?

  - by Kumar225

  I am at a point where I need to take the decision on what to do when caching of objects reaches the configured threshold. Should I store the objects in a indexed file (like provided by JCS) and read them from the file (file IO) when required or have the object stored in a distributed cache (network, serialization, deserialization) We are using Solaris as OS. ============================ Adding some more information. I have this question so as to determine if I can switch to distributed caching. The remote server which will have cache will have more memory and better disk and this remote server will only be used for caching. One of the problems we cannot increase the locally cached objects is , it stores the cached objects in JVM heap which has limited memory(using 32bit JVM). ======================================================================== Thanks, we finally ended up choosing Coherence as our Cache product. This provides many cache configuration topologies, in process vs remote vs disk ..etc.

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• Creating an interactive website

  - by Aviran

  I want to create an interactive website using aspx and ajax, that there will be an option to create chess game room for example and other players will be able to join. I have 2 Questions: I wonder if you have any idea how can I make that after one player clicks on a button and finish his turn, the other player will be able to do a move. After the first player finish his turn I will change the turn by using the database, but the point is how can I refresh the other player's site so when the other one finish his turn, the turn will come to the second player? When someone creates a room and than close his browser - I need that room to be closed. Shall I use the Session_OnEnd to close the room he opened? Thanks!

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• Why can't any browser understand this link? (exept firefox)

  - by Johua

  Hy people. I'm working on my webapp for the iphone. On some point you have the option to get a particular document from our appserver. It works on firefox, but safari just shows an empty download window. IE also can't get the file. Below is the example link. Is there something wrong with a link of this kind that Safari can't see? http://192.168.200.32:9999/USER_STORAGE?user=bt&token=bEVfjg%2FGHoHHU2CxmAWyiTXFUgN9kN2o8pEKgCFV5Fw%3D&nonce=9jJgj4qGXB4U7m%2FJXjjsmbfreH2J2nT8D789jHY6zro%3D&parent_session=cjDEN3PvltsAqjiagynS8mN6HKeAgqWv82WJqxWiXD8%3D&method=download&filename=Testdokument2

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• TFS and team project portal question

  - by DotnetDude

  The team explorer for my project looks like this: mytfsserver\mycollection -- Project 1 solution -- Project 2 solution -- Project 3 solution When I right click on one of the solutions and do a "Show Project Portal", I see the following hierarchy: mycollection - WSS site Project 1 site with dashboard (appears to be a MOSS site) Project 2 site with dashboard (appears to be a MOSS site) Project 3 site with dashboard (appears to be a MOSS site) Are the dashboard sites MOSS sites? If I want to create a wiki, do I have to create a subsite with the wiki template under each of the Project sites? Can someone point me to a document/video that talks about the sites that area created by TFS by default?

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• What causes a WPF ListCollectionView that uses custom sorting to re-sort its items?

  - by Drew Noakes

  Consider this code (type names genericised for the purposes of example): // Bound to ListBox.ItemsSource _items = new ObservableCollection<Item>(); // ...Items are added here ... // Specify custom IComparer for this collection view _itemsView = CollectionViewSource.GetDefaultView(_items) ((ListCollectionView)_itemsView).CustomSort = new ItemComparer(); When I set CustomSort, the collection is sorted as I expect. However I require the data to re-sort itself at runtime in response to the changing of the properties on Item. The Item class derives from INotifyPropertyChanged and I know that the property fires correctly as my data template updates the values on screen, only the sorting logic is not being called. I have also tried raising INotifyPropertyChanged.PropertyChanged passing an empty string, to see if a generic notification would cause the sorting to be initiated. No bananas. EDIT In response to Kent's suggestion I thought I'd point out that sorting the items using this has the same result, namely that the collection sorts once but does not re-sort as the data changes: _itemsView.SortDescriptions.Add( new SortDescription("PropertyName", ListSortDirection.Ascending));

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• Virtual drivers with Windows Driver Model - where to begin?

  - by waitinforatrain

  I've never written drivers before but I'm starting an open-source project that involves creating virtual MIDI ports that will send the MIDI data over a network. For this, I presume I would be creating some sort of virtual driver using WDM (unless it's possible with kernel hooks?) - but being a beginner to driver development I don't know where to begin. Does anyone know any useful resources that would help me with this project? Or some open-source code from a similar project that I could fork as a starting point?

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• Java threadpool functionality

  - by cpf

  Hi stackoverflow, I need to make a program with a limited amount of threads (currently using newFixedThreadPool) but I have the problem that all threads get created from start, filling up memory at alarming rate. I wish to prevent this. Threads should only be created shortly before they are executed. e.g.: I call the program and instruct it to use 2 threads in the pool. The program should create & launch the first 2 Threads immediately (obviously), create the next 2 to wait for the previous 2, and at that point wait until one or both of the first 2 ended executing. I thought about extending executor or FixedThreadPool or such. However I have no clue on how to start there and doubt it is the best solution. Easiest would have my main Thread sleeping on intervals, which is not really good either... Thanks in advance!

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• Huge file in Clojure and Java heap space error

  - by trzewiczek

  I posted before on a huge XML file - it's a 287GB XML with Wikipedia dump I want ot put into CSV file (revisions authors and timestamps). I managed to do that till some point. Before I got the StackOverflow Error, but now after solving the first problem I get: java.lang.OutOfMemoryError: Java heap space error. My code (partly taken from Justin Kramer answer) looks like that: (defn process-pages [page] (let [title (article-title page) revisions (filter #(= :revision (:tag %)) (:content page))] (for [revision revisions] (let [user (revision-user revision) time (revision-timestamp revision)] (spit "files/data.csv" (str "\"" time "\";\"" user "\";\"" title "\"\n" ) :append true))))) (defn open-file [file-name] (let [rdr (BufferedReader. (FileReader. file-name))] (->> (:content (data.xml/parse rdr :coalescing false)) (filter #(= :page (:tag %))) (map process-pages)))) I don't show article-title, revision-user and revision-title functions, because they just simply take data from a specific place in the page or revision hash. Anyone could help me with this - I'm really new in Clojure and don't get the problem.

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• Dynamic data validation in ASP.NET MVC

  - by user252160

  I've recently read about the model validation capabilities of ASP.NET MVC which are all very cool until a certain point. What happens if the application doesn't know the data that it works with because it is all stored in DB and built together at runtime. Just like in Drupal, I'd like to be able to define custom types at runtime, and assign runtime validation rules as well. Obviously, the idea of assigning attributes to well established models is now gone. What else could be done ? I am thinking in terms of rules being stored as JSON objects in the DB fields or something like that.

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• Could not find default endpoint element

  - by edosoft

  I've added a proxy to a webservice to a VS2008/.NET 3.5 solution. When constructing the client .NET throws this error: Could not find default endpoint element that references contract 'IMySOAPWebService' in the service model client configuaration section. This might be because no configuaration file was found for your application or because no end point element matching this contract could be found in the client element Searching for this error tells me to use the full namespace in the contract. Here's my app.config with full namespace: <client> <endpoint address="http://192.168.100.87:7001/soap/IMySOAPWebService" binding="basicHttpBinding" bindingConfiguration="IMySOAPWebServicebinding" contract="Fusion.DataExchange.Workflows.IMySOAPWebService" name="IMySOAPWebServicePort" /> </client> I'm running XP local (I mention this because a number of Google hits mention win2k3) The app.config is copied to app.exe.config, so that is also not the problem. Any clues?

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• JSTL Session Lookup - Key Has Periods

  - by John W.

  Hello All, I am working with some legacy code, and at some point there is a key in the session that is something like session.setAttribute("com.org.something.Object",someObject); Now trying to access this in a jsp using jstl is a bit difficult becuase if I tried it like I normally would I would do: ${sessionScope.com.org.something.Object.someFieldGetter} As most of us can imagine it will fail because there is no com object in session scope. I also tried ${sessionScope.'com.org.something.Object'.someFieldGetter} And a parsing error was thrown. Does anyone know how to resolve this so that I can correctly get the object similar to session.getAttribute("com.org.something.Object") but through jstl? thank you.

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• Steps in subclassing UINavigationController

  - by RickiG

  Hello I would like to subclass the UINavigationController to get some more freedom in regards to the appearance of the controller. I have some graphics for the different parts, bars, buttons, text etc. Looking at the UINavigationController header file I get little help, I don't know where to start out. I have never subclassed/overridden a UIKit component before, it seems it is a bit like playing Sherlock Holmes. What is the approach? How do I know what to override to get a a specific piece of graphics "injected" the correct place? Do I need to subclass UINavigationBar, UIBarButtonItem etc. etc to get the complete customized look? How do I know if something is off limits in regards to being approved by Apple? Hope someone can point me in the right direction, I have only been able to find examples of changing small parts of the controller, not a full customization by subclassing. Am I going about this the wrong way? Thanks:)

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