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Articles indexed in March 2010

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  • moving a sprite causes jerky movement

    - by mac_55
    I've got some jerky movement of my sprite. Basically, when the user touches a point on the screen, the sprite should move to that point. This is working mostly fine... it's even taking into account a delta - because frame rate may not be consistant. However, I notice that the y movement usually finishes before the x movement (even when the distances to travel are the same), so it appears like the sprite is moving in an 'L' shape rather than a smooth diagonal line. Vertical and horizontal velocity (vx, vy) are both set to 300. Any ideas what's wrong? How can I go about getting my sprite to move in a smooth diagonal line? - (void)update:(ccTime)dt { int x = self.position.x; int y = self.position.y; //if ball is to the left of target point if (x<targetx) { //if movement of the ball won't take it to it's target position if (x+(vx *dt) < targetx) { x += vx * dt; } else { x = targetx; } } else if (x>targetx) //same with x being too far to the right { if (x-(vx *dt) > targetx) { x -= vx * dt; } else { x = targetx; } } if (y<targety) { if (y+(vy*dt)<targety) { y += vy * dt; } else { y = targety; } } else if (y>targety) { if (y-(vy*dt)>targety) { y -= vy * dt; } else { y = targety; } } self.position = ccp(x,y); }

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  • MongoMapper won't let me create an object

    - by Jade
    I'm just learning MongoDB and MongoMapper. This is on Rails 3. I created a blog in app/models/blog.rb: class Blog include MongoMapper::Document key :title, String, :required => true key :body, Text timestamps! end I go into the Rails console: rails c Loading development environment (Rails 3.0.0.beta) ruby-1.9.1-p378 > **b = Blog.new** NoMethodError: undefined method `from_mongo' for Text:Module from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/keys.rb:323:in `get' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/keys.rb:269:in `read_key' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/keys.rb:224:in `[]' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/inspect.rb:7:in `block in inspect' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/inspect.rb:6:in `collect' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/inspect.rb:6:in `inspect' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/commands/console.rb:47:in `start' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/commands/console.rb:8:in `start' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/commands.rb:34:in `<top (required)>' from /Users/jade/code/farmerjade/script/rails:10:in `require' from /Users/jade/code/farmerjade/script/rails:10:in `<main>' Am I overlooking something really dumb, or is this something in my setup? I'm using the mongo_mapper version you get by adding it to your Gemfile, so I'm wondering if it might be that. I'd appreciate any suggestions!

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  • How to determine visibility in 2D

    - by Jack
    Hello, I'm developing an AI sandbox and I would like to calculate what every living entity can see. The rule is to simply hide what's behind the edges of the shapes from the point of view of the entity. The image clarifies everything: I need it either as an input to the artificial intelligence either graphically, to show it for a specific entity while it moves.. Any cool ideas?

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  • java: can I convert strings to byte arrays, without a BOM?

    - by Cheeso
    Suppose I have this code: String encoding = "UTF-16"; String text = "[Hello StackOverflow]"; byte[] message= text.getBytes(encoding); If I display the byte array in message, the result is: 0000 FE FF 00 5B 00 48 00 65 00 6C 00 6C 00 6F 00 20 ...[.H.e.l.l.o. 0010 00 53 00 74 00 61 00 63 00 6B 00 4F 00 76 00 65 .S.t.a.c.k.O.v.e 0020 00 72 00 66 00 6C 00 6F 00 77 00 5D .r.f.l.o.w.] As you can see, there's a BOM in the beginning. How can I: generate a UTF-16 byte array that lacks a BOM, from a string? convert from a byte array that contains UTF-16 chars but lacks a BOM, back to a string?

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  • actionscript array remove element

    - by Naro
    I have an array Items which has 10 elements. I need to remove the 5th element (index=4) the new array should have 9 elements and all elements after the 5th element will be shifted forward what command(s) should i use?

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  • java updating text area

    - by n0ob
    for my application I have to build a little customized time ticker which ticks over after whatever delay I tell it to and writes the new value in my textArea. The problem is that the ticker is running fully until the termination time and then printing all the values. How can I make the text area change while the code is running. while(tick<terminationTime){ if ((System.currentTimeMillis()) > (msNow + delay)){ msNow = System.currentTimeMillis(); tick = tick + 1; currentTime.setText(""+tick); sourceTextArea.append(""+tick+" " + System.currentTimeMillis() +" \n"); } currentTime and sourceTextArea are both text areas and both are getting updated after the while loop ends.

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  • How can I round money values to the nearest $5.00 interval?

    - by Frank Developer
    I have an Informix-SQL based Pawnshop app which calculates an estimate of how much money should be loaned to a customer, based on the weight and purity of gold. The minimum the pawnshop lends is $5.00. The pawnshop employee will typically lend amounts which either ends with a 5 or 0. examples: 10, 15, 20, 100, 110, 125, etc. They do this so as to not run into shortage problems with $1.00 bills. So, if for example my system calculates the loan should be: $12.49, then round it to $10, $12.50 to $15.00, $13.00 to $15.00, $17.50 to $20.00, and so on!..The employee can always override the rounded amount if necessary. Is it possible to accomplish this within the instructions section of a perform screen or would I have to write a cfunc and call it from within perform?.. Are there any C library functions which perform interval rounding of money values?.. On another note, I think the U.S. Government should discontinue the use of pennies so that businesses can round amounts to the nearest nickel, it would save so much time and weight in our pockets!

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  • How to serialize parameters in Web Service method

    - by Georgi
    Hi, I have this problem. I have WCF .Net C# web service with this method: public interface IMyService { // TODO: Add your service operations here [OperationContract] ListOfRequests GetListOfRequests(string par1, string par2, string par3, DateTime par4, DateTime par5, string par6, string par7); } public class MyService : IMyService { public ListOfRequests GetListOfRequests(string par1, string par2, string par3, DateTime par4, DateTime par5, string par6, string par7) { // .... web method code here; } } The problem is that when I generate the web service the wsdl schema return this: <xs:element name="GetListOfRequests"> <xs:complexType> <xs:sequence> <xs:element minOccurs="0" name="par1" nillable="true" type="xs:string" /> <xs:element minOccurs="0" name="par2" nillable="true" type="xs:string" /> <xs:element minOccurs="0" name="par3" nillable="true" type="xs:string" /> <xs:element minOccurs="0" name="par4" type="xs:dateTime" /> <xs:element minOccurs="0" name="par5" type="xs:dateTime" /> <xs:element minOccurs="0" name="par6" nillable="true" type="xs:string" /> <xs:element minOccurs="0" name="par7" nillable="true" type="xs:string" /> </xs:sequence> </xs:complexType> </xs:element> and I want my parameters to be not null like this: <xs:element name="GetListOfRequests"> <xs:complexType> <xs:sequence> <xs:element minOccurs="1" name="par1" nillable="false" type="xs:string" /> <xs:element minOccurs="1" name="par2" nillable="false" type="xs:string" /> <xs:element minOccurs="1" name="par3" nillable="false" type="xs:string" /> <xs:element minOccurs="1" name="par4" type="xs:dateTime" /> <xs:element minOccurs="1" name="par5" type="xs:dateTime" /> <xs:element minOccurs="1" name="par6" nillable="false" type="xs:string" /> <xs:element minOccurs="0" name="par7" nillable="true" type="xs:string" /> </xs:sequence> </xs:complexType> </xs:element> How can I serizalize parameters to achieve this? Thank you in advance for your help. Regards, Georgi

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  • ODP.NET Code Example Critque or best practices

    - by andrewWinn
    I currently have a DataAccess Layer in Vb.Net. I am not too happy with my implementation of both my ExecuteQuery (as DataSet) and ExecuteNonQuery functions. Does anyone have any code that I could see? My code just doesn't look clean. Any thoughts or critiques on it would be appreciated also. Using odpConn As OracleConnection = New OracleConnection(_myConnString) odpConn.Open() If _beginTransaction Then txn = odpConn.BeginTransaction(IsolationLevel.Serializable) End If Try Using odpCmd As OracleCommand = odpConn.CreateCommand() odpCmd.CommandType = CommandType.Text odpCmd.CommandText = sSql For i = 0 To parameters.Parameters.Count - 1 Dim prm As New OracleParameter prm = DirectCast(parameters.Parameters(i), ICloneable).Clone odpCmd.Parameters.Add(prm) Next If (odpConn.State = ConnectionState.Closed) Then odpConn.Open() End If iToReturn = odpCmd.ExecuteNonQuery() If _beginTransaction Then txn.Commit() End If End Using Catch txn.Rollback() End Try End Using

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  • SharePoint MOSS Approve/Reject button customisation

    - by 78lro
    It seems that the out of the box approve/reject buttons in SharePoint CMS try to direct you to an InfoPath form. We have implemented custom .aspx pages that we use for our workflow approval process and would like it to show these when a user clicks the buttons. Currently we get an error that the formURN cannot be found. Can I affect the url that is shown when the approve/reject buttons are clicked or Can I hide those buttons and provide my own buttons/functionality for that purpose Thanks for any suggestions

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  • Why does the Combo.SelectedValue get lost after some time

    - by tzup
    So I have this asp:DropDownList on a page. It renders like this (in IE7): <select name="ctl00$cphFilter$cbLista" onchange="javascript:setTimeout('__doPostBack(\'ctl00$cphFilter$cbLista\',\'\')', 0)" id="ctl00_cphFilter_cbLista" class="agsSelect"> <option selected="selected" value="4350">A</option> <option value="4352">B</option> <option value="4349">C</option> <option value="4348">D</option> And then I have a grid and a button on the same page. When the user clicks the button the selected item of the dropdown is read (well a datasource object reads it) and the grid does a databind after a trip to a DB where it gets some data based on that selected value. This works fine most of the time. However sometimes, the selection in the dropdownlist seems to get lost even though the rendered page says the A is the selected item. The datasource object is defined like this: <asp:ObjectDataSource ID="dsVM" runat="server" EnablePaging="False" SelectMethod="Select" SortParameterName="sort" TypeName="X.Business.Entities.LPVM.BE"> <SelectParameters> <asp:ControlParameter Name="listaId" Type="Int32" ControlID="cphFilter$cbLista" PropertyName="SelectedValue" /> </SelectParameters> </asp:ObjectDataSource> Any ideas why the grid would reload its data with a select parameter that is 0 instead of the selected value of the dropdownlist? EDIT Suppose the dropdownlist is bound, the user selected B and the grid is bound as well and shows the right data. Now, I wait 2 minutes and I click the Refresh button. Surprisingly, at this particular moment the dropdownlist.SelectedValue (which I already know it was 4352 before I clicked because that's how it looks in the rendered page) is actually an empty string. Where did the value go?

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  • Debugging ASP.NET Strings Downloaded to Browser (Montréal instead of Montréal)

    - by jdk
    I'm downloading a vCard to the browser using Response.Write to output .NET strings with special accented characters. Mime type is text/x-vcard and French characters are appearing wrong in Outlook, for example Montréal;Québec .NET string shows as Montréal Québec in browser. I'm using this vCard generator code from CodeProject.com I've played with the System.Encoding sample code at the bottom of this linked MSDN page to convert the unicode string into bytes and then write the ascii bytes but then I get Montr?al Qu?bec (progress but not a win). Also I've tried setting content type to both us-ascii and utf-8 of the response. If I open the downloaded vCard in Windows Notepad and save it as ANSI text (instead of default unicode format) and open in Outlook it's okay. So my assumption is I need to cause download of ANSI charset but am unsure if I'm doing it wrong or have a misunderstanding of where to start. Update: Looking at the raw HTTP, it appears my French characters are being downloaded in the unexpected format so it looks like I need to do some work on the server side... (full size)

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  • Add network service

    - by user302655
    I have a kernel service driver , i want to install it with an installer . I use Wix that already copy files in driver store but i still need to add the service to the nerwork manualy (in local area connection properties) How can i do this in wix or in javascript ?

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  • MVVM load data during or after ViewModel construction?

    - by mkmurray
    My generic question is as the title states, is it best to load data during ViewModel construction or afterward through some Loaded event handling? I'm guessing the answer is after construction via some Loaded event handling, but I'm wondering how that is most cleanly coordinated between ViewModel and View? Here's more details about my situation and the particular problem I'm trying to solve: I am using the MVVM Light framework as well as Unity for DI. I have some nested Views, each bound to a corresponding ViewModel. The ViewModels are bound to each View's root control DataContext via the ViewModelLocator idea that Laurent Bugnion has put into MVVM Light. This allows for finding ViewModels via a static resource and for controlling the lifetime of ViewModels via a Dependency Injection framework, in this case Unity. It also allows for Expression Blend to see everything in regard to ViewModels and how to bind them. So anyway, I've got a parent View that has a ComboBox databound to an ObservableCollection in its ViewModel. The ComboBox's SelectedItem is also bound (two-way) to a property on the ViewModel. When the selection of the ComboBox changes, this is to trigger updates in other views and subviews. Currently I am accomplishing this via the Messaging system that is found in MVVM Light. This is all working great and as expected when you choose different items in the ComboBox. However, the ViewModel is getting its data during construction time via a series of initializing method calls. This seems to only be a problem if I want to control what the initial SelectedItem of the ComboBox is. Using MVVM Light's messaging system, I currently have it set up where the setter of the ViewModel's SelectedItem property is the one broadcasting the update and the other interested ViewModels register for the message in their constructors. It appears I am currently trying to set the SelectedItem via the ViewModel at construction time, which hasn't allowed sub-ViewModels to be constructed and register yet. What would be the cleanest way to coordinate the data load and initial setting of SelectedItem within the ViewModel? I really want to stick with putting as little in the View's code-behind as is reasonable. I think I just need a way for the ViewModel to know when stuff has Loaded and that it can then continue to load the data and finalize the setup phase. Thanks in advance for your responses.

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  • Reverse Engineering Custom Data File

    - by kerchingo
    At my place of work we have a legacy document management system that is now unsupported by the developers due to variours reasons, i have been asked to look into extracting the documents contained in this system to eventually be imported into a new 3rd party system. From various tracing and process monitoring I have determined that the document images (mainly tiff files) are stored in a number of 1.5gb files, these files seem to be read from a speficic offset and then written to a tmp file that is then served via a web app to the client and then deleted. I guess i am looking for suggestions as how I can inspect these large files that containn the tiff images and eventually extract and write them to individual files.

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  • Windows typeperf and pound signs.

    - by Weegee
    I'm currently trying to use typeperf to access some Windows performance counters. Unfortunately, a few of the instances I'm trying to check are of the format service#1. The command typeperf "\\server\Process(service#1)\Working Set Peak" is unfortunately returning the data for \\server\Process(service)\Working Set Peak rather than the data for the instance service#1. This holds true for any of the services that have pound signs in the counter string. Does anyone know of a method to get around this problem? Sample output: I:\>typeperf -s server "\Process(service#1)\Working Set" "(PDH-CSV 4.0)","\\server\Process(service)\Working Set" "10/08/2009 09:37:29.070","1643274240.000000" "10/08/2009 09:37:30.070","1643274240.000000" "10/08/2009 09:37:31.070","1643274240.000000" The command completed successfully. I:\>typeperf -s server "\Process(service#2)\Working Set" "(PDH-CSV 4.0)","\\server\Process(service)\Working Set" "10/08/2009 09:37:39.273","1643274240.000000" "10/08/2009 09:37:40.273","1643274240.000000" "10/08/2009 09:37:41.273","1643274240.000000" "10/08/2009 09:37:42.273","1643274240.000000" "10/08/2009 09:37:43.273","1643274240.000000" The command completed successfully. I can confirm in PerfMon that the Working Set value "1643274240.000000" is incorrect for both service#1 and service#2. I am running Windows XP Service Pack 2, but a co-worker who is running Windows Server 2003 was having the same troubles.

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  • Migrating VPC images to Hyper-V

    - by user12015
    I have a couple of development Virtual PC images; now I installed Windows Server 2008 + Hyper-V on my main dev laptop and need to migrate those images to Hyper-V. Google only brings steps for some older version of Hyper-V - I dont even see the wizard steps they are talking about. Any help would be highly appreciated! Thanks! - Andrey

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  • Windows XP restarting repeatedly after a fresh restore

    - by DWilliams
    I don't normally deal with Windows but someone wanted me to fix their computer with Windows XP on it. It was just restarting every time it tried to boot. It would not go into safe mode, the result was the same regardless of the selected mode. The computer is like 4 years old and has been running the same installation for that entire time, so I figured the easiest solution was just to back up their files and re-install. I loaded the computer up with a live CD and copied their files off to a USB drive, then proceeded to run HP's "factory restore" feature (which I'm not particularly fond of, I'd rather have a disk to install from than reload all the crapware HP gets paid to install for you). It restored, and I put all their files back, installed their programs, and started the full windows update process. Everything seemed great so I left and told them what to do once it finished. A few hours pass, and my phone rings. Apparently it started doing the exact same thing as before once the updates finished. I don't have the computer sitting in front of me now so I can't really provide any more information than that. What could be causing this and, more importantly, how do I fix it? The fact that the same problem resurfaced after the restore makes me think it's either a hardware problem or an update breaking the computer.

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