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  • Finding all the shortest paths between two nodes in unweighted directed graphs using BFS algorithm

    - by andra-isan
    Hi All, I am working on a problem that I need to find all the shortest path between two nodes in a given directed unweighted graph. I have used BFS algorithm to do the job, but unfortunately I can only print one shortest path not all of them, for example if they are 4 paths having lenght 3, my algorithm only prints the first one but I would like it to print all the four shortest paths. I was wondering in the following code, how should I change it so that all the shortest paths between two nodes could be printed out? class graphNode{ public: int id; string name; bool status; double weight;}; map<int, map<int,graphNode>* > graph; int Graph::BFS(graphNode &v, graphNode &w){ queue <int> q; map <int, int> map1; // this is to check if the node has been visited or not. std::string str= ""; map<int,int> inQ; // just to check that we do not insert the same iterm twice in the queue map <int, map<int, graphNode>* >::iterator pos; pos = graph.find(v.id); if(pos == graph.end()) { cout << v.id << " does not exists in the graph " <<endl; return 1; } int parents[graph.size()+1]; // this vector keeps track of the parents for the node parents[v.id] = -1; // there is a direct path between these two words, simply print that path as the shortest path if (findDirectEdge(v.id,w.id) == 1 ){ cout << " Shortest Path: " << v.id << " -> " << w.id << endl; return 1; } //if else{ int gn; map <int, map<int, graphNode>* >::iterator pos; q.push(v.id); inQ.insert(make_pair(v.id, v.id)); while (!q.empty()){ gn = q.front(); q.pop(); map<int, int>::iterator it; cout << " Popping: " << gn <<endl; map1.insert(make_pair(gn,gn)); //backtracing to print all the nodes if gn is the same as our target node such as w.id if (gn == w.id){ int current = w.id; cout << current << " - > "; while (current!=v.id){ current = parents[current]; cout << current << " -> "; } cout <<endl; } if ((pos = graph.find(gn)) == graph.end()) { cout << " pos is empty " <<endl; continue; } map<int, graphNode>* pn = pos->second; map<int, graphNode>::iterator p = pn->begin(); while(p != pn->end()) { map<int, int>::iterator it; //map1 keeps track of the visited nodes it = map1.find(p->first); graphNode gn1= p->second; if (it== map1.end()) { map<int, int>::iterator it1; //if the node already exits in the inQ, we do not insert it twice it1 = inQ.find(p->first); if (it1== inQ.end()){ parents[p->first] = gn; cout << " inserting " << p->first << " into the queue " <<endl; q.push(p->first); // add it to the queue } //if } //if p++; } //while } //while } I do appreciate all your great help Thanks, Andra

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  • Java Implementing htonl

    - by Hamza Yerlikaya
    I am communicating with a server, each message sent to the server has to be padded with the length of the message, unsigned int len = htonl(msg.size()); In C running the length through htonl and padding the message works, in Java AFAIK byte order is already in network order so I assumed all I have to do is write the string length before the message to the stream, but this does not work am I missing something? stream.write(msg.length()); stream.write(msg.getBytes()); Stream is an OutputStream.

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  • jQuery / wordpress issue with .addClass based on url

    - by Jonathon Joyce
    Hi, I'm have some issues adding a class to 2 navigation links on a theme. I need to add a class based on a url string as i'm redirecting the page to another. You can see the blog here: http://208.43.250.67/~thingsig/ Links are: 'Blog' and 'Keepers' I'm using the following code: <script type="text/javascript"> if (window.location.pathname.indexOf('/category/blog/')){ if ( $('#nav ul li a span').text().contains('BLOG') ){ //add class 'current_page_item' to: $('#nav ul li').addClass('current_page_item'); } } if (window.location.pathname.indexOf('/category/keepers/')){ if ( $('#nav ul li a span').text().contains('KEEPERS') ){ //add class 'current_page_item' to: $('#nav ul li').addClass('current_page_item'); } } </script> Can anyone see why that doesnt work? I get the following error: $ is not a function [Break on this error] if ( $('#nav ul li a span').text().contains('BLOG') ){

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  • Spring MVC and Jetty: Prevent jsessionid from being used in RedirectView on redirect to external sit

    - by Moritz Both
    In Spring MVC 2.5 with Jetty - probably with any servlet container -, I want to redirect to an external site using RedirectView via the magic "redirect:" prefix for the view name in ModelAndView. Unfortunately, RedirectView uses response.encodeURL(), so my (otherwiese wanted) session id is appended to the URL. It is not only a security risk to carry the session id to the external site, the ";jsessionid=gagnbaba" string may also be interpreted as part of the ContextPath/PathInfo on the other site, resulting in a bad URL. Any "springish" options other than implement my own ExternalRedirectView... and also hack the ViewResolver to interpret a "externalRedirect:" prefix? (Requiring cookies is not an option.) Moritz

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  • Proper Case Title Case Question

    - by Michael Quiles
    What am i doing wrong here? I want the users name to be shown in the output as propercase but I cant figure it out. string proper = this.xTripNameTextBox.Text; CultureInfo properCase = System.Threading.Thread.CurrentThread.CurrentCulture; TextInfo currentInfo = properCase.TextInfo; proper = currentInfo.ToTitleCase(proper); this.xTripOutputLabel.Text = proper + Environment.NewLine + "The total gallons you would use: " + Output.ToString("0") + Environment.NewLine + "Total amount it will cost you: " + Coutput.ToString("C") + Environment.NewLine +" Your customer number is " + rnd1.Next(1, 1000).ToString();

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  • retreive POST data from FLASH to ASP.Net

    - by Martin Ongtangco
    here's my AS3 code: var jpgEncoder:JPGEncoder = new JPGEncoder(100); var jpgStream:ByteArray = jpgEncoder.encode(bitmapData); var header:URLRequestHeader = new URLRequestHeader("Content-type", "application/octet-stream"); var jpgURLRequest:URLRequest = new URLRequest("/patients/webcam.aspx"); jpgURLRequest.requestHeaders.push(header); jpgURLRequest.method = URLRequestMethod.POST; jpgURLRequest.data = jpgStream; navigateToURL(jpgURLRequest, "_self"); And here's my ASP.Net Code try { string pt = Path.Combine(PathFolder, "test.jpg"); HttpFileCollection fileCol = Request.Files; Response.Write(fileCol.Count.ToString()); foreach (HttpPostedFile hpf in fileCol) { hpf.SaveAs(pt); } } catch (Exception ex) { Response.Write(ex.Message); } im getting a weird error, HttpFox mentioned: "NS_ERROR_NET_RESET" Any help would be excellent! Thanks!

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  • how to play video from url

    - by priyanka
    i am biginner in android development and try to play video from link but it's give error "sorry,we can't play this video" i tride so many links but for all links its show same error. My code it follwing public class VideoDemo extends Activity { private static final String path ="http://demo.digi-corp.com/S2LWebservice/Resources/SampleVideo.mp4"; private VideoView video; private MediaController ctlr; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); getWindow().setFormat(PixelFormat.TRANSLUCENT); setContentView(R.layout.videoview); video = (VideoView) findViewById(R.id.video); video.setVideoPath(path); ctlr = new MediaController(this); ctlr.setMediaPlayer(video); video.setMediaController(ctlr); video.requestFocus(); } } thansk in advance

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  • BufferedReader.readLine() gives error java.net.SocketException: Software caused connection abort: re

    - by javatcp
    I am trying to code my program such that until the buffered reader gets something in readLine() from my tcp client it should keep running in the while loop checking but I get this error as soon as the program executes Mar 31, 2010 11:03:36 PM deswash.DESWashView$5 run SEVERE: null java.net.SocketException: Software caused connection abort: recv failed at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:129) at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:264) at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:306) at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158) at java.io.InputStreamReader.read(InputStreamReader.java:167) at java.io.BufferedReader.fill(BufferedReader.java:136) at java.io.BufferedReader.readLine(BufferedReader.java:299) at java.io.BufferedReader.readLine(BufferedReader.java:362) at deswash.DESWashView$5.run(DESWashView.java:448) the second line in the following code throws the error while(running){ String temp = in.readLine(); if(!(temp.equals(null))){ int inid = Integer.parseInt(temp); stationList.add(inid); } }

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  • Problem loading XMLDocument with non standard tags

    - by David Conde
    Hi, I have a code needed to load an XML document from a reader, something like this: private static XmlDocument GetDocumentStream(string xmlAddress) { var settings = new XmlReaderSettings(); settings.DtdProcessing = DtdProcessing.Ignore; settings.ValidationFlags = XmlSchemaValidationFlags.None; var reader = XmlReader.Create(xmlAddress, settings); document.Load(reader); return document; } But in my XML document, I have nodes like this one: <link rel="edit-media" title="Package" href="Packages(Id='51Degrees.mobi',Version='0.1.11.9')/$value" /> Is to my understanding that the node should be like <link rel="edit-media" title="Package"></link> But, I don't create the Xml document and I certainly don't want to change it, but when I try to load the XML document, the document.Load line throws an exception. To be more specific, the XML file is the RSS source for the nuPack project. Any ideas would be very appreaciated on how to be able to read this document properly.

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  • Python decoding issue with hashlib.digest() method

    - by Sorw
    Hello StackOverflow community, Using Google App Engine, I wrote a keyToSha256() method within a model class (extending db.Model) : class Car(db.Model): def keyToSha256(self): keyhash = hashlib.sha256(str(self.key())).digest() return keyhash When displaying the output (ultimately within a Django template), I get garbled text, for example : ?????_??!`?I?!?;?QeqN??Al?'2 I was expecting something more in line with this : 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08 Am I missing something important ? Despite reading several guides on ASCII, Unicode, utf-8 and the like, I think I'm still far from mastering the secrets of string encoding/decoding. After browsing StackOverflow and searching for insights via Google, I figured out I should ask the question here. Any idea ? Thanks !

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  • Consume a WebService with Integrated authentication from WPF windows application

    - by Tr1stan
    I have written a WPF windows application that consumes a .net WebService. This works fine when the web service in hosted to allow anonymous connections, however the WebService I need to consume when we go live will be held within a website that has Integrated Authentication enabled. The person running the WPF application will be logged onto a computer within the same domain as the web server and will have permission to see the WebService (without entering any auth info) if browsing to it using a web browser that is NTLM auth enabled. Is it possible to pass through the details of the already logged in user running the application to the WebService? Here is the code I'm currently using: MyWebService.SearchSoapClient client = new SearchSoapClient(); //From the research I've done I think I need to something with these: //UserName.PreAuthenticate = true; //System.Net.CredentialCache.DefaultCredentials; List<Person> result = client.FuzzySearch("This is my search string").ToList(); Any pointers much appreciated.

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  • Ruby Iconv works with irb and ruby debugger but not in a unit test

    - by Mark B
    I'm running Ruby 1.8.7 with Rails 2.3.5 on Ubuntu 10.04 64-bit. I've written a method that should take a string like this, "École À la Découverte" and output a file-system name like this "ecole_a_la_decouverte": (Iconv.new('US-ASCII//TRANSLIT', 'utf-8').iconv "École À la Découverte").gsub(/[^\w\s-\—]/,'').gsub(/[^\w]|[_]/,' ').split.join('_').downcase When I test this line in my code, the test always fails saying that "cole_la_dcouverte" is unequal to "ecole_a_la_decouverte". The odd thing is that if I insert a debugger line and use the debugger console the test passes. As well, running this line manually in irb seems to work. Does anyone know what's going on and why this test is failing? My only thought is that including the debugger or irb somehow adds more support for UTF-8 but I'm at a loss to figure out where to go next. Thanks in advance!

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  • Hibernates generates VARBINARY column with JPA @Enumerated annotation

    - by tran
    Hibernates is generating a VARBINARY column with JPA @Enumerated annotation. I'm using SQL Server 2005 w/ JTDS driver. The mapping is dirt simple: @Basic @Enumerated(EnumType.ORDINAL) private MyEnum foo; I would have expected Hibernate to generate an integer column? I've also tried EnumType.STRING (expecting a varchar column) with no success. Note that my app works fine; the column type makes it hard to inspect the DB, and to issue adhoc SQL when poking at the database.

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  • setting picture captured by built-in camera into an ImageView

    - by MAkS
    in my app i m calling built in camera for capturing picture but i want to set that picture into an image view following is the code . so what code should i add to it to set the picture into imageview. public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); startActivityForResult(intent, 0); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == Activity.RESULT_OK && requestCode == 0) { String result = data.toURI(); // ... } } Thanks in advance

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  • Android: How to create an onclick event for a SimpleCursorAdapter?

    - by user117701
    I have this code: db=(new DatabaseHelper(this)).getWritableDatabase(); constantsCursor=db.rawQuery("SELECT _ID, title, subtitle, image "+ "FROM news ORDER BY title", null); ListAdapter adapter=new SimpleCursorAdapter(this, R.layout.row, constantsCursor, new String[] {"title", "subtitle", "image"}, new int[] {R.id.value, R.id.title, R.id.icon}); setListAdapter(adapter); registerForContextMenu(getListView()); Which displays a list of titles. I dont however for the life of me know how to create a click event so that i can call another view when i click an item from that list. Anyone?

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  • How to avoid "The name 'ConfigurationManager' does not exist in the current context" error?

    - by 5YrsLaterDBA
    I am using VS2008. I have a project connect with a database and the connection string is read from App.config via ConfigurationManager. We are using L2E. Now I added a helper project, AndeDataViewer, to have a simple UI to display data from the database for testing/verification purpose. I don't want to create another set of Entity Data Model in the helper project. I just added all related files as a link in the new helper project. When I compile, I got the following error: Error 15 The name 'ConfigurationManager' does not exist in the current context C:\workspace\SystemSoftware\SystemSoftware\src\systeminfo\RuntimeInfo.cs 24 40 AndeDataViewer I think I may need to add another project setting/config related file's link to the helper project from the main project? There is no App.config file in the new helper project. But it looks I cannot add that file's link to the helper project. Any ideas?

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  • Java - short and casting

    - by chr1s
    Hi all, I have the following code snippet. public static void main(String[] args) { short a = 4; short b = 5; short c = 5 + 4; short d = a; short e = a + b; // does not compile (expression treated as int) short z = 32767; short z_ = 32768; // does not compile (out of range) test(a); test(7); // does not compile (not applicable for arg int) } public static void test(short x) { } Is the following summary correct (with regard to only the example above using short)? direct initializations without casting is only possible using literals or single variables (as long as the value is in the range of the declared type) if the rhs of an assignment deals with expressions using variables, casting is necessary But why exactly do I need to cast the argument of the second method call taking into account the previous summary?

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  • SignalR: hub invokation request

    - by Yuriy Pogrebnyak
    I'm writing custom SignalR client and I need to implement hub invokation. As I understood from .NET client code, I need to send post request to the following url (after establishing connection with server): http://serverurl/signalr/send?transport=serverSentEvents&connectionId=<my_connection_id> . In request body I need to send json string containing basic information about the invoked method. My question is how should this json look like? I'm trying to send smth like this (again, judging by .NET client code): {"data" : {"Hub" : "hubname", "Method" : "methodname", "Args" : {"message" : "msg"} } } But I get the following error: System.ArgumentNullException: Value cannot be null. Parameter name: s. What am I doing wrong? What are required parameters of sending json and how should it be formatted?

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  • wsimport and header params for logging

    - by Milan
    I have this situation. Generating form based on the WSDL. I made it but I came to the situation when the wsimport tool generates classes with methods with params for header(for authentication) and the params are not just simple types. But some complex. The problem is that I dont know which classes will be generated so I need simple types for the methods. @WebMethod(operationName = "DNSLookup", action = "http://www.strikeiron.com/DNSLookup") @WebResult(name = "DNSLookupResult", targetNamespace = "http://www.strikeiron.com") @RequestWrapper(localName = "DNSLookup", targetNamespace = "http://www.strikeiron.com", className = "invoker.DNSLookup") @ResponseWrapper(localName = "DNSLookupResponse", targetNamespace = "http://www.strikeiron.com", className = "invoker.DNSLookupResponse") public SIWsOutputOfDNSInfo dnsLookup( @WebParam(name = "HostNameOrIPAddress", targetNamespace = "http://www.strikeiron.com") String hostNameOrIPAddress, @WebParam(name = "LicenseInfo", targetNamespace = "http://ws.strikeiron.com", header = true, partName = "LicenseInfo") LicenseInfo licenseInfo, @WebParam(name = "SubscriptionInfo", targetNamespace = "http://ws.strikeiron.com", header = true, mode = WebParam.Mode.OUT, partName = "SubscriptionInfo") Holder<SubscriptionInfo> subscriptionInfo); you can see that LicenseInfo licenseInfo, and Holder subscriptionInfo);? Is it possible to somehow to specify to have simple types for header params?

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  • How can I set up .NET UnhandledException handling in a Windows service?

    - by Mike Pateras
    protected override void OnStart(string[] args) { AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException); Thread.Sleep(10000); throw new Exception(); } void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e) { } I attached a debugger to the above code in my windows service, setting a breakpoint in CurrentDomain_UnhandledException, but it was never hit. The exception pops up saying that it is unhandled, and then the service stops. I even tried putting some code in the event handler, in case it was getting optimized away. Is this not the proper way to set up unhandled exception handling in a windows service?

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  • PHP regex to match sentences that contain a year

    - by zen
    I need a regular expression that will extract sentences from text that contain a year in them. Example text: Next, in 1988 the Bradys were back again for a holiday celebration, "A Very Brady Christmas". Susan Olsen (Cindy) would be missing from this reunion, Jennifer Runyon took her place. This was a two hour movie in which the Bradys got together to celebrate Christmas, introducing the world to the spouses and children of the Brady kids. This movie was the highest rated TV-movie of 1988. If the example text was variable $string, I need it to return: $sentenceWithYear[0] = Next, in 1988 the Bradys were back again for a holiday celebration, "A Very Brady Christmas". $sentenceWithYear[1] = This movie was the highest rated TV-movie of 1988. If it's possible to retain the year via regex, I'd use the year within the sentence and eventually insert the sentences into a database like: INSERT INTO table_name (year, sentence) VALUES ('$year', '$sentenceWithYear[x]')

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  • How do I set the jax-ws client request timeout programatically on jboss?

    - by Jonas Andersson
    I am trying to set the request (and connection) timeout for a jax-ws-webservice-client generated with the jaxws-maven-plugin. When running my app under tomcat or jetty the timeout works, but when deployed under jboss it doesn't "take". private void setRequestAndConnectionTimeout(Object wsPort) { String REQUEST_TIMEOUT = BindingProviderProperties.REQUEST_TIMEOUT; // "com.sun.xml.ws.request.timeout"; ((BindingProvider) wsPort).getRequestContext().put(REQUEST_TIMEOUT, timeoutInMillisecs); ((BindingProvider) wsPort).getRequestContext().put(JAXWSProperties.CONNECT_TIMEOUT, timeoutInMillisecs); } What is the correct way to do this for JBoss?

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  • Call stored procedure using Spring SimpleJdbcCall with callback

    - by MFIhsan
    I have an Oracle Stored procedure that takes CLOB input and REFCURSOR output. I invoke the SP via Spring SimpleJdbcCall passing in a RowMapper to map the results. However, since the result set is large, I need to provide callback feature to the client. I can't quite figure out how to add callback for an SP call using Spring - both with and without SimpleJdbcCall. One thought I have is to pass-in a RowCallbackHandler. Will this work or is there a better way to solve this problem? Any help here is appreciated. private Map<String, Object> arguments = ...; SimpleJdbcCall jdbcCall = new SimpleJdbcCall(this.jdbcTemplate) .withCatalogName(this.packageName) .withProcedureName(this.storedProcName) .withoutProcedureColumnMetaDataAccess() .declareParameters(this.outputParameters.toArray(new SqlOutParameter[]{})); if(!isEmpty(inputParameters)) { jdbcCall.declareParameters(inputParameters.toArray(new SqlParameter[]{})); } this.outputParameters.add(new SqlOutParameter(outputParamName, VARCHAR, rowMapper)); jdbcCall.execute(arguments);

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  • Regular expressions in findstr

    - by Johannes Rössel
    I'm doing a little string validation with findstr and its /r flag to allow for regular expressions. In particular I'd like to validate integers. The regex ^[0-9][0-9]*$ worked fine for non-negative numbers but since I now support negative numbers as well I tried ^([1-9][0-9]*|0|-[1-9][0-9]*)$ for either positive or negative integers or zero. The regex works fine theoretically. I tested it in PowerShell and it matches what I want. However, with findstr /r /c:"^([1-9][0-9]*|0|-[1-9][0-9]*)$" it doesn't. While I know that findstr doesn't have the most advanced regex support (even below Notepad++ which is probably quite an achievement), I would have expected such simple expressions to work. Any ideas what I'm doing wrong here?

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  • Calling a webservice through jquery cross domain

    - by IanCian
    hi there, i am new to jquery so please bare with me, I am trying to connect to a .asmx webservice (cross domain) by means of client-side script now actually i am having problems to use POST since it is being blocked and in firebug is giving me: OPTIONS Add(method name) 500 internal server error. I bypassed this problem by using GET instead, it is working fine when not inputting any parameters but is giving me trouble with parameters. please see below for the code. The following is a simple example I am trying to make work out with the use of parameters. With Parameters function CallService() { $.ajax({ type: "GET", url: "http://localhost:2968/MyService.asmx/Add", data: "{'num1':'" + $("#txtValue1").val() + "','num2':'" + $("#txtValue2").val() + "'}", //contentType: "application/json; charset=utf-8", dataType: "jsonp", success: function(data) { alert(data.d); } }); Webservice [WebMethod, ScriptMethod(UseHttpGet = true, XmlSerializeString = false, ResponseFormat = ResponseFormat.Json)] public string Add(int num1, int num2) { return (num1 + num2).ToString(); }

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