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• Simple algorithm for a sudoku solver java

  - by user142050

  just a quick note first, I originally asked this question on stack overflow but was refered here instead. I've been stuck on this thing for a while, I just can't wrap my head around it. For a homework, I have to produce an algorithm for a sudoku solver that can check what number goes in a blank square in a row, in a column and in a block. It's a regular 9x9 sudoku and I'm assuming that the grid is already printed so I have to produce the part where it solves it. I've read a ton of stuff on the subject I just get stuck expressing it. I want the solver to do the following: If the value is smaller than 9, increase it by 1 If the value is 9, set it to zero and go back 1 If the value is invalid, increase by 1 I've already read about backtracking and such but I'm in the early stage of the class so I'd like to keep it as simple as possible. I'm more capable of writing in pseudo code but not so much with the algorithm itself and it's the algorithm that is needed for this exercise. Thanks in advance for your help guys.

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• send music to upnp device from PC

  - by markrich

  I have a new Arcam AirDAC (http://www.arcam.co.uk/products,rSer...ACs,airDAC.htm) attached to my stereo which has upnp support. I would like to send audio from my 14.04 PC to the box itself and to this end installed Rygel upon my system to help but it hasn't. I have created a new sound device in PulseAudioPreferences and selected it from inidcator-sound-switcher but here I become stuck. The sound is heading to the new sound device as the volume can be seen to go up and down from PulseAudioVolumeControl but no sound comes from the stereo downstairs. The problem, as I see it, is the new device has no idea where to send the music as the Arcam hasn't been chosen from any program. So - I installed BubbleUPNP and Plex. My music has been imported into the later and the former can see both the Arcam as a Renderer and the Plex as the Media Server. Installing the BubbleUPNP program on my Android tablet allowed me to send music and all seemed good UNTIL I started playing AIFF and ALAC music and it all stopped. No suitable decoding device. So that scuppered that route. So here I am and stuck. How can I tell Ubuntu to use the Arcam as a renderer to play music through when the albums are played from Rhytmnbox, Tomahawk, Clementine or other? Clementine would be my preferred client as there is a usable remote control program for the tablet. Can anyone help me fix this or advice another way to do what I would like?

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• Windows recv method usage

  - by vandamon taigi

  I'm making a multiplayer game and I have an issue with the recv function ( or the send one , not sure ). Server side code : char* UserName = new char[256]; ZeroMemory(UserName,256); recv(sConnect,UserName,256,0); // works char* Password = new char[256]; ZeroMemory(Password,256); recv(sConnect,Password,256,0); // works users[ ++usercount ] = new Client(UserName,Password,sConnect); if( users[usercount] ->GetLogInSuccesful() ) send(sConnect,"0x0001",6,0); // debugging shows it gets here and sends the data. Client side code : send(server->getsConnect(),User,256,0); // works send(server->getsConnect(),Pass,256,0); // works char* Response = new char[6]; ZeroMemory(Response,6); recv(server->getsConnect(),Response,6,0); // gets stuck here. Any ideea why does it get stuck on that recv ? I also tried by making response [256] or such.

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• Graphical Interface and Object Selection/Manipulation

  - by ToriArendt

  I have a project I want to try to implement, but I'm kind of stuck on how to get started. I know there are probably a lot of resources that I can look at, but I'm really just stuck on what to even search for and where to begin. Basically, I have a program written in Java that separates 3D coordinates from a 3D reconstructed model into different objects. I then want to be able to perform a logistic regression on these objects to determine if they are type A or type B. But first, I need to classify a training set of objects as type A or B by hand. I don't know ANYTHING about graphing or user interfaces in Java, so I have been plotting the coordinates of a given object in MATLAB so that I can visualize the object and assign it a type. Now, as I am trying to make this program more "user friendly" I want to create an interface in Java where I can simply graph all the coordinates of the objects from the entire 3D model (on the same graph). I then want to be able to click on the each object and assign it to be either of type A or type B. I hope this description makes sense and someone can point me in the direction of something that will help me. I'm sorry if some of this terminology is off; I'm a bit new to software development. P.S. If anyone also has some tips on implementing logistic regression in Java, I'm sure I'll need them down the road :).

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• no boot option after install ubuntu 12.04 LTS using cd

  - by utamaku

  im facing a problem. after installing Ubuntu 12.04 LTS using boot from CD, when reboot there is no boot option to choose the OS. i directly log in to my Windows 7. before this im having an issue with the 'nomodeset' if not mistaken. after tick [x] on the nomodeset, i can install my Ubuntu, and stuck again at choosing the partition. so i had done 2 partitions for ubuntu, 1 partition for ubuntu ( ext3, mount /) and the other 1 for swap. then i can proceed until finished the installation. and after the system want to reboot. it take some times and just stuck at the screen doing nothing. not rebooting at all. i force to shutdown then restart again then directly go into windows 7 without boot option. in win7 the partitions for ubuntu is gone. i had tried the boot-repair thing and still doesn't help. it just show up the _ (terminal thing i guess). i typed boot repair and still the same. im using acer aspire 4736z. please anybody help me with this issue.

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• Monitor dectecs wrong display mode

  - by user292449

  I am running into an issue with 14.04. I have two monitors. the fist one is a 19 inch LG that runs off DVI at 1440x900. It seems to function just fine. The second is a 23 inch LG that should run at 1920x1200. It has been plugged in with both a HDMI to HDMI cable and a DVI to HDMI cable. It seems to be stuck in "I am displaying for a DVD player in 1080p mode" or some such. I had this issue with windows a long long time ago and eventually it just went away. I can set the screen display to 1920x1200 with the generic X drivers but I am a gamer and would like to use the Nvidia drivers since they deliver better performance. When I switch to the Nvidia driver I can set the resolution to 1920x1200 but the screen seems to be up and to the left with a black border down and to the right. If I switch back to the default X driver after this the screen remains stuck in the up and to the left mode. Any help would be wonderful.

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• Problem with understanding how to start

  - by Coolface

  Okay, this might be a little off-topic but i try anyway. Sorry to bother. So i'm working as sysadmin for at least 5 years now and i quite enjoy IT field in general. Somehow i was never interested in programming much but always want to learn something at least easy and for personal usage. As sysadmin i need scripting skills so learn shell scripting without much problems, i also try to learn pascal, delphi, basic over time and must recent was python. Well, my problem is when i try to learn programming i just can't apply what i learn from the books to the real word. What i mean is i understand there are data structures, algorithms, variables, lib's, if-then logic, etc. but i just can't understand how to apply this things when i want to do real things. Like i want to get a something simple as parse web page, i draw a quick algorithm like get a web page, find a word on it and write a to file, on the paper everything look simple but when i get to the coding i just stuck pretty much from the start. I try read code of the real programs that just totally confusing especially big parts with many classes so i'm just quickly lost a trail what this code do. I think i just lack some fundamentals to see a big picture but don't really know what this might be? Or maybe i just don't have a passion to programming at all... My best bet was a shell scripting so i have really no problems to write complex scripts but this just not enough. Recently i was read around 5 or 6 python books because everyone say it's so easy even kid can code something but still no much luck, python is good and easy but i can't make something harder then a prodecurial style code like in bash for easy things but when i want harder things i'm still stuck. In college i was also not a math and tech guy and like to study non-tech stuff mostly like economy, psychology maybe that my problem? Anyway any advice would be greatly appriciated.

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• How to add add node in binary tree

  - by m.qayyum

  (5)Root (3)-------^--------(7) (2)---^----(5) ^-----(8) i want to add node with data 5 in this binray tree....Please help.....i really stuck in it

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• F# equivalent of the C# 'object' keyword

  - by akaphenom

  I am trying to port an existing c# to f# and would I am getting stuck on porting this c# line: public object myInnerOject

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• Best practice in this situation?

  - by Steve

  My Delphi program relies heavily on Outlook automation. Outlook versions prior to 2007-SP2 tend to get stuck in memory due to badly written addins and badly written Outlook code. If Outlook is stuck, calling CreateOleObject('Outlook.Application') or GetActiveObject ... doesn't return and keeps my application hanging till Outlook.exe is closed in the task manager. I've thought of a solution, but I'm unsure whether it's good practice or not. I'd start Outlook with CreateOleObject in a separate thread, wait 10 seconds in my main thread and if Outlook hangs (CreateOleObject doesn't return), offer the user to kill the Outlook.exe process from my program. But since I don't want to force the user to kill the Outlook.exe proccess, as an alternative I also need a way to kill the new thread in my program which keeps hanging now. My questions are: a, Is this good practice b, How can I terminate a hanging thread in Delphi without leaking memory? Is there a way?

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• How to display images from SD card in a GalleryView

  - by OceanBlue

  I am trying to display all the images stored in SD card in a Gallery View. I have tried using the content provider (android.provider.MediaStore.images.Media class), but seem to be getting stuck at a point. Not sure if this is the way to go about it. Here is my code so far: String[] colsNeeded = new String[]{Media._ID, Media.TITLE}; Uri mMedia = Media.EXTERNAL_CONTENT_URI; //Create a cursor using the URI & column names needd Cursor c = managedQuery(mMedia, colsNeeded, null, null, Media.DATE_TAKEN + " ASC"); //What kind of adapter should I create here //that contains images from the cursor?? SpinnerAdapter sa = null; //This is the point I get stuck //Set the adapter of the gallery view Gallery galleryPetPhotos = (Gallery)findViewById(R.id.GalleryPetPhotos); galleryPetPhotos.setAdapter(sa); Just a nudge in the right direction would be greatly appreciated.

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• Problem on IE6-8 with jQuery

  - by Alain Fontaine

  Hello guys, I'm stuck here with this IE6 issue.. always a pain. So I'm using jQuery's "live" feature to add a product each time. Then once each dropdown's value is changed, an input field assigned to it changes its value too so when I hit submit, it sends all the info. Everything works perfectly fine except in IE6, IE7, and IE8. I have no idea why... I've gone through the code and everything... so please guys. Help! :) These are all the files: Index.php http://pastie.org/967139 Submit.php http://pastie.org/967140 JS http://pastie.org/967141 Please guys, I'm really stuck here. I would appreciate some help. Thanks, Alain

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• Java object to XML Elements?

  - by DaveKub

  I'm working on a webservices client app and I have it mostly working. I can retrieve and read data from the third-party webservice fine. Now I need to submit some data and I'm stuck. The classes for the objects I'm retrieving/submitting were generated from XSD files via the xjc tool. The part I'm stuck on is turning one of those objects into an XML tree to submit to the webservice. When I retrieve/send a request from/to the ws, it contains a 'payload' object. This is defined in java code as (partial listing): @XmlAccessorType(XmlAccessType.FIELD) @XmlType(name = "PayloadType", propOrder = { "compressed", "document", "any", "format" }) public class PayloadType { @XmlElement(name = "Compressed") protected String compressed; @XmlElement(name = "Document") protected List<String> document; @XmlAnyElement protected List<Element> any; protected String format; public List<Element> getAny() { if (any == null) { any = new ArrayList<Element>(); } return this.any; } } The only field I'm concerned with is the 'any' field which contains an XML tree. When I retrieve data from the ws, I read that field with something like this: ('root' is of org.w3c.dom.Element type and is the result of calling 'getAny().get(0)' on the payload object) NodeList nl = root.getElementsByTagName("ns1:Process"); // "ns1:Process" is an XML node to do something with if (nl != null && nl.getLength() > 0) { for (int i = 0; i < nl.getLength(); i++) { Element proc = (Element) nl.item(i); try { // do something with the 'proc' Element here... } catch (Exception ex) { // handle problems here... } } } Submitting data is where I'm stuck. How do I take a java object created from one of the classes generated from XSD and turn it into an Element object that I can add to the 'any' List of the payload object?? For instance, if I have a DailyData class and I create and populate it with data: DailyData dData = new DailyData(); dData.setID = 34; dData.setValues = "3,5,76,23"; How do I add that 'dData' object to the 'any' List of the payload object? It has to be an Element. Do I do something with a JAXBContext marshaller? I've used that to dump the 'dData' object to the screen to check the XML structure. I'm sure the answer is staring me in the face but I just can't see it! Dave

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• Emacs: ac-slime for auto complete

  - by Boris

  I am trying to add auto complete for *.lisp files. My slime setting is: (add-to-list 'load-path "~/.emacs.d/plugins/slime/") (setq slime-lisp-implementations '((sbcl ("/opt/sbcl/bin/sbcl" "--core" "/opt/sbcl/lib/sbcl/sbcl.core") :coding-system utf-8-unix :env ("SBCL_HOME=/opt/sbcl/lib/sbcl")) (ccl ("/opt/ccl/lx86cl64") :coding-system utf-8-unix))) (require 'slime-autoloads) (slime-setup '(slime-fancy)) And ac-slime setting is: (require 'ac-slime) (add-hook 'slime-mode-hook 'set-up-slime-ac) (add-hook 'slime-repl-mode-hook 'set-up-slime-ac) (eval-after-load "auto-complete" '(add-to-list 'ac-modes 'slime-repl-mode)) Each time I type a word in *.lisp file, auto complete popups some candidates but after a second minibuffer outputs error in process filter: Reply to canceled synchronous eval request tag=slime-result-6-19579 sexp=(swank:simple-completions "de" (quote "COMMON-LISP-USER")) and the popup stuck for a while. After that I can continue my selection. My question is how to remove this error and stuck? Any help is appreciated.

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• WaitForSingleObject( )

  - by Rakesh Agarwal

  I have got myself stuck into a really amazing issue here.The code is like as below. class A { public: A(){ m_event = CreateEvent(NULL, false, false, NULL); // create an event with initial value as non-signalled m_thread = _beginthread(StaticThreadEntry, 0, this); // create a thread } static void StaticThreadEntry(A * obj) { obj->ThreadEntry(); } void ThreadEntry(); }; void A::ThreadEntry() { WaitforSingleObject(m_event,INFINITE); } int main() { A a; SetEvent(m_event); // sets the event to signalled state which causes the running thread to terminate WaitForSingleObject(m_thread, INFINITE); // waits for the thread to terminate return 0; } Problem : When the above code is run,sometimes( 1 out of 5 ) it hangs and the control gets stuck in the call to WaitforSingleObject()( inside the main function ).The code always calls SetEvent() function to ensure that the thread would terminate before calling Wait() function. I do not see any reason why it should ever hang?

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• Choosing between YUI Charts or Google Visualization API

  - by r2b2

  Hello , I'm a bit stuck with which charting library I will use in my project. Im stuck with this two (but also open for other suggestions) For YUI Charts : Pro : - Very robust and configurable Cons : - Uses flash 9 , which might potentially be inaccessible for users without up to date flash version - Does not support export to image (for flash versions < 10 only) For Google Visualization API pros: - small file size for the libraries, - can be exported to static image charts (via separate API call) Cons - limited configuration options So there, please help me decide. YUI charts has the edge over configuration options but Google Visualization API has the edge in terms of accessibility as it uses SVG to render the grapsh instead of Flash. For users that are hand-cuffed by corporate IT prohibitions , they cant just upgrade their Flash version and the page will not work. Thanks!

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• Artificial Intelligence in online game using Google App Engine

  - by Hortinstein

  I am currently in the planning stages of a game for google app engine, but cannot wrap my head around how I am going to handle AI. I intend to have persistant NPCs that will move about the map, but short of writing a program that generates the same XML requests I use to control player actions, than run it on another server I am stuck on how to do it. I have looked at the Task Queue feature, but due to long running processes not being an option on the App engine, I am a little stuck. I intend to run multiple server instances with 200+ persistant NPC entities that I will need to update. Most action is slowly roaming around based on player movements/concentrations, and attacking close range players...(you can probably guess the type of game im developing)

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• If terminating a hung thread is a good idea, how do I do it safely?

  - by Steve

  My Delphi program relies heavily on Outlook automation. Outlook versions prior to 2007-SP2 tend to get stuck in memory due to badly written addins and badly written Outlook code. If Outlook is stuck, calling CreateOleObject('Outlook.Application') or GetActiveObject ... doesn't return and keeps my application hanging till Outlook.exe is closed in the task manager. I've thought of a solution, but I'm unsure whether it's good practice or not. I'd start Outlook with CreateOleObject in a separate thread, wait 10 seconds in my main thread and if Outlook hangs (CreateOleObject doesn't return), offer the user to kill the Outlook.exe process from my program. But since I don't want to force the user to kill the Outlook.exe process, as an alternative I also need a way to kill the new thread in my program which keeps hanging now. Is this good practice? How can I terminate a hanging thread in Delphi without leaking memory?

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• Repeating parallax using Cocos2D on Android

  - by Saurabh Verma

  I want to draw a infinitely repeating parallax using Cocos2D on Android. Now, there are some solutions given to this problem in Objective C, but I'm stuck with my implementation in Android. I have tried using CCSprite background = CCSprite.sprite("background_island.png"); CCTexParams params = new CCTexParams(GL10.GL_LINEAR,GL10.GL_LINEAR,GL10.GL_REPEAT,GL10.GL_REPEAT); background.getTexture().setTexParameters(params); But it only extends the background in 1 direction. I guess I have to use 2 sprites, such that as soon as 1st finishes, the other starts and vice versa, but I'm stuck with the implementation.

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• How to solve JavaScript origin problem with an application and static file server

  - by recipriversexclusion

  In a system that I'm building I want to serve Static files (static HTML pages and a lot of images), and Dynamic XML generated by my servlet. The dynamic XML is generated from my database (through Hibernate) and I use Restlets to serve it in response to API calls. I want to create a static file server (e.g. Apache) so that this does not interfere with the dynamic server traffic. Currently both servers need to run on the same machine. I've never done something like this before and this is where I'm stuck: The static HTML pages contain JavaScript that makes API calls to the dynamic server. However, since the two servers operate on different ports, I get stuck with the same origin problem. How can this be solved? As a bonus, if you can point me to any resources that explain how to create such a static/dynamic content serving system, I'll be happy. Thanks!

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• What's the VB.NET equivalent of this C# code for wiring up and declaring an event?

  - by Ben McCormack

  I'm working on a tutorial to build a media player in Silverlight and am trying to wire up an EventHandler to the timer.Tick event of a DispatchTimer object so that the time of the video is synced with a Slider object. The sample code is in C# and I can't for the life of me figure out the proper syntax in VB.NET with RaiseEvent and/or Handles to wire up the event. Below is the relevant C# code. I'll include comments on where I'm getting stuck. private DispatchTimer timer; public Page() { //... timer = new DispatchTimer(); timer.Interval = TimeSpan.FromMilliseconds(50); timer.Tick += new EventHandler(timer_Tick); // <== I get stuck here b/c // I can't do "timer.Tick += ..." in VB.NET } void timer_Tick(object sender, EventArgs e) { if (VideoElement.NaturalDuration.TimeSpan.TotalSeconds > 0) { sliderScrubber.Value = VideoElement.Position.TotalSeconds / VideoElement.NaturalDuration.TimeSpan.TotalSeconds; } }

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• How does one advance in programming?

  - by Joe Barr

  I really have the felling as if I'm stuck in my own craft. I've been developing and learning for a while now and keep having the feeling that I should advance more, or even be more knowledgeable. I've started projects I didn't finish because I thought I lacked the knowledge and the skill to make that feature work just right, or to make that code magically appear on my screen. I've read books I didn't finish, thinking I wasn't advanced enough for the subjects they covered. I've been around long enough to know that everything comes with experience, hard work and dedication. Having said this, I just want to be able to work without getting stuck on a particular problem that involves my cluelessness of a language or a tool feature. My question to you would be, how does one advance in programming? What are the secrets (if any) to advance to the point of fluency in a particular language or a task. Thank you!

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• Converting mxml Rect & SolidColor to actionscript

  - by touB

  I'm trying to learn how to use actionscript over mxml for flexibility. I have this simple block of mxml that I'm trying to convert to actionscript, but I'm stuck half way though <s:Rect id="theRect" x="0" y="50" width="15%" height="15%"> <s:fill> <s:SolidColor color="black" alpha="0.9" /> </s:fill> </s:Rect> I can convert the Rect no problem to private var theRect:Rect = new Rect(); theRect.x = 0; theRect.y = 50; theRect.width = "15%"; theRect.height = "15%"; then I'm stuck on the fill. What's the most efficient way to add the SolidColor in as few lines of code as possible.

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• Correct model for a database with a table for each user.

  - by BAH

  Kinda stuck here... I have an application with lets say 5000 rows of data per user and was wondering if it was right or wrong to do it this way: On user account creation a new table is created (UserData_[UserID]) or should I just have 1 table for userdata and have everything in there with a column for userid? The reason I am stuck at the moment is that it seems NHibernate isn't able to be mapped to dynamic table names without creating another ISessionFactory which has alot of overhead AFAIK. Any help would be greatly appreciated. Thanks.

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• vba: a forever loop

  - by I__

  Sub something(tecan) On Error Resume Next Dim arr As New Collection, a Dim aFirstArray() As Variant Dim i As Long aFirstArray() = Array(Dir(tecan & "*.ESY", vbNormal)) aFirstArray(0) = Mid(aFirstArray(0), 1, 4) Do While Dir <> "" ReDim Preserve aFirstArray(UBound(aFirstArray) + 1) aFirstArray(UBound(aFirstArray)) = Mid(Dir, 1, 4) Loop On Error Resume Next For Each a In aFirstArray arr.Add a, a Next For i = 1 To arr.Count Cells(i, 1) = arr(i) 'open_esy (tecan & arr(i) & "*") Next Erase aFirstArray For i = 1 To arr.Count arr.Remove i Next i here is how i call this sub: something (tecan1) something (tecan2) on the first call it works and does what it is supposed to but on the second call it gets stuck in this loop: Do While Dir <> "" ReDim Preserve aFirstArray(UBound(aFirstArray) + 1) aFirstArray(UBound(aFirstArray)) = Mid(Dir, 1, 4) Loop why does it get stuck in the loop?

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