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  • Draw arrow on line algorithm

    - by nunos
    Does anyone have an algorithm for drawing an arrow in the middle of a given line. I have searched for google but haven't found any good implementation. P.S. I really don't mind the language, but it would be great if it was Java, since it is the language I am using for this. Thanks in advance.

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  • Maximum Method Name Length

    - by Josh
    Does anyone happen to know what the maximum length of a method name is in your programming language of choice? I was going to make this a C# specific question, but I think it would be nice to know across the spectrum. What are the factors involved as well: Does the language specification limit this? What does the compiler limit it to? Is it different on 32bit vs 64bit machines?

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  • Javassist annoations problem

    - by Ali
    I'm trying to generate my Entity class using javassist. Everything went well until I added the GeneratedValue annotation to the Id field. The @Id annotation works fine but when I add @GeneeratedValue I get an exception. This is my code: ClassPool cp = ClassPool.getDefault(); CtClass ctClass = cp.makeClass("test.Snake"); ClassFile classFile = ctClass.getClassFile(); classFile.setVersionToJava5(); AnnotationsAttribute attribute = new AnnotationsAttribute(classFile.getConstPool(), AnnotationsAttribute.visibleTag); Annotation idAnnotation = new Annotation(classFile.getConstPool(), ClassPool.getDefault().get("javax.persistence.Id")); attribute.addAnnotation(idAnnotation); Annotation gvAnnotation = new Annotation(classFile.getConstPool(), ClassPool.getDefault().get("javax.persistence.GeneratedValue")); attribute.addAnnotation(gvAnnotation); CtField idField = new CtField(ClassPool.getDefault().get("java.lang.Long"), "id", ctClass); idField.getFieldInfo().addAttribute(attribute); ctClass.addField(idField); CtField nameField = new CtField(ClassPool.getDefault().get("java.lang.String"), "name", ctClass); ctClass.addField(nameField); AnnotationsAttribute attr = new AnnotationsAttribute(classFile.getConstPool(), AnnotationsAttribute.visibleTag); Annotation annotation = new Annotation(classFile.getConstPool(), ClassPool.getDefault().get("javax.persistence.Entity")); attr.addAnnotation(annotation); classFile.addAttribute(attr); snakeClass = ctClass.toClass(); newInstance = snakeClass.newInstance(); And this is the exception I get: java.lang.NullPointerException at javassist.bytecode.ConstPool.getUtf8Info(ConstPool.java:565) at javassist.bytecode.annotation.EnumMemberValue.getValue(EnumMemberValue.java:98) at javassist.bytecode.annotation.EnumMemberValue.write(EnumMemberValue.java:116) at javassist.bytecode.annotation.Annotation.write(Annotation.java:316) at javassist.bytecode.AnnotationsAttribute.setAnnotations(AnnotationsAttribute.java:246) at javassist.bytecode.AnnotationsAttribute.addAnnotation(AnnotationsAttribute.java:211) at ClassLoadingTest.javassitTest(ClassLoadingTest.java:56) It seems to be a problem with @GeneratedValue. When I use it alone whithout id I get this exception either. When I use eclipse debugger to watch variable values, I get get this com.sun.jdi.InvocationException occurred invoking method. instead of the annotation value. but for Id annotation it shows a javassist annotation object. I'm new to javassist. Can anyone help me?

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  • print a linear linked list into a table

    - by user1796970
    I am attempting to print some values i have stored into a LLL into a readable table. The data i have stored is the following : DEBBIE STARR F 3 W 1000.00 JOAN JACOBUS F 9 W 925.00 DAVID RENN M 3 H 4.75 ALBERT CAHANA M 3 H 18.75 DOUGLAS SHEER M 5 W 250.00 SHARI BUCHMAN F 9 W 325.00 SARA JONES F 1 H 7.50 RICKY MOFSEN M 6 H 12.50 JEAN BRENNAN F 6 H 5.40 JAMIE MICHAELS F 8 W 150.00 i have stored each firstname, lastname, gender, tenure, payrate, and salary into their own List. And would like to be able to print them out in the same format that they are viewed on the text file i read them in from. i have messed around with a few methods that allow me to traverse and print the Lists, but i end up with ugly output. . . here is my code for the storage of the text file and the format i would like to print out: public class Payroll { private LineWriter lw; private ObjectList output; ListNode input; private ObjectList firstname, lastname, gender, tenure, rate, salary; public Payroll(LineWriter lw) { this.lw = lw; this.firstname = new ObjectList(); this.lastname = new ObjectList(); this.gender = new ObjectList(); this.tenure = new ObjectList(); this.rate = new ObjectList(); this.salary = new ObjectList(); this.output = new ObjectList(); this.input = new ListNode(); } public void readfile() { File file = new File("payfile.txt"); try{ Scanner scanner = new Scanner(file); while(scanner.hasNextLine()) { String line = scanner.nextLine(); Scanner lineScanner = new Scanner(line); lineScanner.useDelimiter("\\s+"); while(lineScanner.hasNext()) { firstname.insert1(lineScanner.next()); lastname.insert1(lineScanner.next()); gender.insert1(lineScanner.next()); tenure.insert1(lineScanner.next()); rate.insert1(lineScanner.next()); salary.insert1(lineScanner.next()); } } }catch(FileNotFoundException e) {e.printStackTrace();} } public void printer(LineWriter lw) { String msg = " FirstName " + " LastName " + " Gender " + " Tenure " + " Pay Rate " + " Salary "; output.insert1(msg); System.out.println(output.getFirst()); System.out.println(" " + firstname.getFirst() + " " + lastname.getFirst() + "\t" + gender.getFirst() + "\t" + tenure.getFirst() + "\t" + rate.getFirst() + "\t" + salary.getFirst()); } }

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  • How to use a defined struct from another source file?

    - by sasayins
    Hi, I am using Linux as my programming platform and C language as my programming language. My problem is, I define a structure in my main source file( main.c): struct test_st { int state; int status; }; So I want this structure to use in my other source file(e.g. othersrc.). Is it possible to use this structure in another source file without putting this structure in a header? Thanks

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  • ASP.NET MVC - Localization route

    - by ropstah
    Hi, i'd like to create localized URL's for my site. They should obviously point to the same controller actions, but I want the first routevalues to -always- be the location/language specification. Is this possible? http://www.website.com/en/us/controller/action http://www.website.com/en/gb/controller/action I understand it can be done by defining {language} and {location} in every route, but i'm looking for a slick, non-hacky solution.

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  • Sending large serialized objects over sockets is failing only when trying to grow the byte Array, bu

    - by FinancialRadDeveloper
    I have code where I am trying to grow the byte array while receiving the data over my socket. This is erroring out. public bool ReceiveObject2(ref Object objRec, ref string sErrMsg) { try { byte[] buffer = new byte[1024]; byte[] byArrAll = new byte[0]; bool bAllBytesRead = false; int iRecLoop = 0; // grow the byte array to match the size of the object, so we can put whatever we // like through the socket as long as the object serialises and is binary formatted while (!bAllBytesRead) { if (m_socClient.Receive(buffer) > 0) { byArrAll = Combine(byArrAll, buffer); iRecLoop++; } else { m_socClient.Close(); bAllBytesRead = true; } } MemoryStream ms = new MemoryStream(buffer); BinaryFormatter bf1 = new BinaryFormatter(); ms.Position = 0; Object obj = bf1.Deserialize(ms); objRec = obj; return true; } catch (System.Runtime.Serialization.SerializationException se) { objRec = null; sErrMsg += "SocketClient.ReceiveObject " + "Source " + se.Source + "Error : " + se.Message; return false; } catch (Exception e) { objRec = null; sErrMsg += "SocketClient.ReceiveObject " + "Source " + e.Source + "Error : " + e.Message; return false; } } private byte[] Combine(byte[] first, byte[] second) { byte[] ret = new byte[first.Length + second.Length]; Buffer.BlockCopy(first, 0, ret, 0, first.Length); Buffer.BlockCopy(second, 0, ret, first.Length, second.Length); return ret; } Error: mscorlibError : The input stream is not a valid binary format. The starting contents (in bytes) are: 68-61-73-43-68-61-6E-67-65-73-3D-22-69-6E-73-65-72 ... Yet when I just cheat and use a MASSIVE buffer size its fine. public bool ReceiveObject(ref Object objRec, ref string sErrMsg) { try { byte[] buffer = new byte[5000000]; m_socClient.Receive(buffer); MemoryStream ms = new MemoryStream(buffer); BinaryFormatter bf1 = new BinaryFormatter(); ms.Position = 0; Object obj = bf1.Deserialize(ms); objRec = obj; return true; } catch (Exception e) { objRec = null; sErrMsg += "SocketClient.ReceiveObject " + "Source " + e.Source + "Error : " + e.Message; return false; } } This is really killing me. I don't know why its not working. I have lifted the Combine from a suggestion on here too, so I am pretty sure this is not doing the wrong thing? I hope someone can point out where I am going wrong

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  • x86 assembly idioms

    - by susmits
    I've been trying to get a good hold on the x86 assembly language, and was wondering if there was a quick-and-short equivalent of movl $1, %eax. That's when I thought that a list of idioms used frequently in the language would perhaps be a good idea. This could include the preferred use of xorl %eax, %eax as opposed to movl $0, %eax, or testl %eax, %eax against cmpl $0, %eax. Oh, and kindly post one example per post!

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  • Is DataRow thread safe? How to update a single datarow in a datatable using multiple threads? - .net

    - by NLV
    Hello all I want to update a single datarow in a datatable using multiple threads. Is this actually possible? I've written the following code implementing a simple multi-threading to update a single datarow. I get different results each time. Why is it so? public partial class Form1 : Form { private static DataTable dtMain; private static string threadMsg = string.Empty; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { Thread[] thArr = new Thread[5]; dtMain = new DataTable(); dtMain.Columns.Add("SNo"); DataRow dRow; dRow = dtMain.NewRow(); dRow["SNo"] = 5; dtMain.Rows.Add(dRow); dtMain.AcceptChanges(); ThreadStart ts = new ThreadStart(delegate { dtUpdate(); }); thArr[0] = new Thread(ts); thArr[1] = new Thread(ts); thArr[2] = new Thread(ts); thArr[3] = new Thread(ts); thArr[4] = new Thread(ts); thArr[0].Start(); thArr[1].Start(); thArr[2].Start(); thArr[3].Start(); thArr[4].Start(); while (!WaitTillAllThreadsStopped(thArr)) { Thread.Sleep(500); } foreach (Thread thread in thArr) { if (thread != null && thread.IsAlive) { thread.Abort(); } } dgvMain.DataSource = dtMain; } private void dtUpdate() { for (int i = 0; i < 1000; i++) { try { dtMain.Rows[0][0] = Convert.ToInt32(dtMain.Rows[0][0]) + 1; dtMain.AcceptChanges(); } catch { continue; } } } private bool WaitTillAllThreadsStopped(Thread[] threads) { foreach (Thread thread in threads) { if (thread != null && thread.ThreadState == ThreadState.Running) { return false; } } return true; } } Any thoughts on this? Thank you NLV

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  • C# - WebBrowser control seems to cache screenshots

    - by Justin
    Hey, I'm using the WebBrowser control in an ASP.NET MVC 2 app (don't judge, I'm doing it in an admin section only to be used by me), here's the code: public static class Screenshot { private static string _url; private static int _width; private static byte[] _bytes; public static byte[] Get(string url) { // This method gets a screenshot of the webpage // rendered at its full size (height and width) return Get(url, 50); } public static byte[] Get(string url, int width) { //set properties. _url = url; _width = width; //start screen scraper. var webBrowseThread = new Thread(new ThreadStart(TakeScreenshot)); webBrowseThread.SetApartmentState(ApartmentState.STA); webBrowseThread.Start(); //check every second if it got the screenshot yet. //i know, the thread sleep is terrible, but it's the secure section, don't judge... int numChecks = 20; for (int k = 0; k < numChecks; k++) { Thread.Sleep(1000); if (_bytes != null) { return _bytes; } } return null; } private static void TakeScreenshot() { try { //load the webpage into a WebBrowser control. using (WebBrowser wb = new WebBrowser()) { wb.ScrollBarsEnabled = false; wb.ScriptErrorsSuppressed = true; wb.Navigate(_url); while (wb.ReadyState != WebBrowserReadyState.Complete) { Application.DoEvents(); } //set the size of the WebBrowser control. //take Screenshot of the web pages full width. wb.Width = wb.Document.Body.ScrollRectangle.Width; //take Screenshot of the web pages full height. wb.Height = wb.Document.Body.ScrollRectangle.Height; //get a Bitmap representation of the webpage as it's rendered in the WebBrowser control. var bitmap = new Bitmap(wb.Width, wb.Height); wb.DrawToBitmap(bitmap, new Rectangle(0, 0, wb.Width, wb.Height)); //resize. var height = _width * (bitmap.Height / bitmap.Width); var thumbnail = bitmap.GetThumbnailImage(_width, height, null, IntPtr.Zero); //convert to byte array. var ms = new MemoryStream(); thumbnail.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); _bytes = ms.ToArray(); } } catch(Exception exc) {//TODO: why did screenshot fail? string message = exc.Message; } } This works fine for the first screenshot that I take, however if I try to take subsequent screenshots of different URL's, it saves screenshots of the first url for the new url, or sometimes it'll save the screenshot from 3 or 4 url's ago. I'm creating a new instance of WebBrowser for each screenshot and am disposing of it properly with the "using" block, any idea why it's behaving this way? Thanks, Justin

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  • Creating GUI desktop applications that call into either OCaml or Haskell -- Is it a fool's errand?

    - by Rob Lachlan
    In both Haskell and OCaml, it's possible to call into the language from C programs. How feasible would it be to create Native applications for either Windows, Mac, or Linux which made extensive use of this technique? (I know that there are GUI libraries like wxHaskell, but suppose one wanted to just have a portion of your application logic in the foreign language.) Or is this a terrible idea?

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  • what is the difference between response.redirect and response status 301 redirects in asp ?

    - by Nikhil Vaghela
    Our asp application is moving to new server and i want to implement a permenant url redirection. I am aware of following two approaches , i need to understand which one to user over other and when ? Option 1: <%@ Language=VBScript %><% Response.Redirect “http://www.new-url.com” %> Option 2: <%@ Language=VBScript %><% Response.Status="301 Moved Permanently" Response.AddHeader "Location","http://www.new-url.com/" %> Thanks, Nikhil.

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  • How to create Ror style Restful routing in Asp.net MVC Web Api

    - by Jas
    How to configure routing in asp.net web api, to that I can code for the following actions in my ApiController inherited class? |======================================================================================| |Http Verb| Path | Action | Used for | |======================================================================================| | GET | /photos | index | display a list of all photos | | GET | /photos/new | new | return an HTML form for creating a new photo | | POST | /photos/ | create | create a new photo | | GET | /photos/:id | show | display a specific photo | | GET | /photos/:id/edit | edit | return an HTML form for editing a photo | | PUT | /photos/:id | update | update a specific photo | | DELETE | /photos/:id | destroy | delete a specific photo |

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  • .NET MVC Ajax Form - How do you hide it?

    - by Tommy
    Ok, everything is 'functionally' working with what I am attempting to accomplish and once again, I am sure this is something dumb, but I cannot figure out how to do this one thing. I have an edit form for an entity, lets say a car. This 'car' can have 0 - many passengers. So on my edit form, I have all the fields for the car, then a list view showing each passenger (partial). I also have a 'add new passenger' button that will render a new partial view that allows you to enter a passenger. This has a cancel link and an add button to submit an Ajax form. When you add a passenger, the passenger is automatically added to the list, but I need the enter passenger form to go away. I have tried using the onSuccess and onComplete functions to hide the div that the form is in, but both render just the partial view HTML elements (white screen, text) and not the partialView in the context of the entire page. Sources: 1) Main Edit View <script type="text/javascript"> Function hideForm(){ document.getElementById('newPassenger').style.display = 'none'; } </script> <h2>Edit</h2> <%-- The following line works around an ASP.NET compiler warning --%> <%= ""%> <%Html.RenderPartial("EditCar", Model)%> <h2>Passengers for this car</h2> <%=Ajax.ActionLink("Add New Passenger", "AddPassenger", New With {.ID = Model.carID}, New AjaxOptions With {.UpdateTargetId = "newPassenger", .InsertionMode = InsertionMode.Replace})%> <div id="newPassenger"></div> <div id="passengerList"> <%Html.RenderPartial("passengerList", Model.Passengers)%> </div> <div> <%= Html.ActionLink("Back to List", "Index") %> </div> 2) AddPassenger View. The cancel link below is an action that returns nothing, thus removing the information in the div. <% Using Ajax.BeginForm("AddPassengerToCar", New With {.id = ViewData("carID")}, New AjaxOptions With {.UpdateTargetId = "passengerList", .InsertionMode = InsertionMode.Replace})%> <%=Html.DropDownList("Passengers")%> <input type="submit" value="Add" /> <%=Ajax.ActionLink("Cancel", "CancelAddControl", _ New AjaxOptions With {.UpdateTargetId = "newPassenger", .InsertionMode = InsertionMode.Replace})%><% end using %>

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  • When to use closure?

    - by shahkalpesh
    I have seen samples of closure from - http://stackoverflow.com/questions/36636/what-is-a-closure Can anyone provide simple example of when to use closure? Specifically, scenarios in which closure makes sense? Lets assume that the language doesn't have closure support, how would one still achieve similar thing? Not to offend anyone, please post code samples in a language like c#, python, javascript, ruby etc. I am sorry, I do not understand functional languages yet.

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  • The Clocks on USACO

    - by philip
    I submitted my code for a question on USACO titled "The Clocks". This is the link to the question: http://ace.delos.com/usacoprob2?a=wj7UqN4l7zk&S=clocks This is the output: Compiling... Compile: OK Executing... Test 1: TEST OK [0.173 secs, 13928 KB] Test 2: TEST OK [0.130 secs, 13928 KB] Test 3: TEST OK [0.583 secs, 13928 KB] Test 4: TEST OK [0.965 secs, 13928 KB] Run 5: Execution error: Your program (`clocks') used more than the allotted runtime of 1 seconds (it ended or was stopped at 1.584 seconds) when presented with test case 5. It used 13928 KB of memory. ------ Data for Run 5 ------ 6 12 12 12 12 12 12 12 12 ---------------------------- Your program printed data to stdout. Here is the data: ------------------- time:_0.40928452 ------------------- Test 5: RUNTIME 1.5841 (13928 KB) I wrote my program so that it will print out the time taken (in seconds) for the program to complete before it exits. As can be seen, it took 0.40928452 seconds before exiting. So how the heck did the runtime end up to be 1.584 seconds? What should I do about it? This is the code if it helps: import java.io.; import java.util.; class clocks { public static void main(String[] args) throws IOException { long start = System.nanoTime(); // Use BufferedReader rather than RandomAccessFile; it's much faster BufferedReader f = new BufferedReader(new FileReader("clocks.in")); // input file name goes above PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("clocks.out"))); // Use StringTokenizer vs. readLine/split -- lots faster int[] clock = new int[9]; for (int i = 0; i < 3; i++) { StringTokenizer st = new StringTokenizer(f.readLine()); // Get line, break into tokens clock[i * 3] = Integer.parseInt(st.nextToken()); clock[i * 3 + 1] = Integer.parseInt(st.nextToken()); clock[i * 3 + 2] = Integer.parseInt(st.nextToken()); } ArrayList validCombination = new ArrayList();; for (int i = 1; true; i++) { ArrayList combination = getPossibleCombinations(i); for (int j = 0; j < combination.size(); j++) { if (tryCombination(clock, (int[]) combination.get(j))) { validCombination.add(combination.get(j)); } } if (validCombination.size() > 0) { break; } } int [] min = (int[])validCombination.get(0); if (validCombination.size() > 1){ String minS = ""; for (int i=0; i<min.length; i++) minS += min[i]; for (int i=1; i<validCombination.size(); i++){ String tempS = ""; int [] temp = (int[])validCombination.get(i); for (int j=0; j<temp.length; j++) tempS += temp[j]; if (tempS.compareTo(minS) < 0){ minS = tempS; min = temp; } } } for (int i=0; i<min.length-1; i++) out.print(min[i] + " "); out.println(min[min.length-1]); out.close(); // close the output file long end = System.nanoTime(); System.out.println("time: " + (end-start)/1000000000.0); System.exit(0); // don't omit this! } static boolean tryCombination(int[] clock, int[] steps) { int[] temp = Arrays.copyOf(clock, clock.length); for (int i = 0; i < steps.length; i++) transform(temp, steps[i]); for (int i=0; i<temp.length; i++) if (temp[i] != 12) return false; return true; } static void transform(int[] clock, int n) { if (n == 1) { int[] clocksToChange = {0, 1, 3, 4}; add3(clock, clocksToChange); } else if (n == 2) { int[] clocksToChange = {0, 1, 2}; add3(clock, clocksToChange); } else if (n == 3) { int[] clocksToChange = {1, 2, 4, 5}; add3(clock, clocksToChange); } else if (n == 4) { int[] clocksToChange = {0, 3, 6}; add3(clock, clocksToChange); } else if (n == 5) { int[] clocksToChange = {1, 3, 4, 5, 7}; add3(clock, clocksToChange); } else if (n == 6) { int[] clocksToChange = {2, 5, 8}; add3(clock, clocksToChange); } else if (n == 7) { int[] clocksToChange = {3, 4, 6, 7}; add3(clock, clocksToChange); } else if (n == 8) { int[] clocksToChange = {6, 7, 8}; add3(clock, clocksToChange); } else if (n == 9) { int[] clocksToChange = {4, 5, 7, 8}; add3(clock, clocksToChange); } } static void add3(int[] clock, int[] position) { for (int i = 0; i < position.length; i++) { if (clock[position[i]] != 12) { clock[position[i]] += 3; } else { clock[position[i]] = 3; } } } static ArrayList getPossibleCombinations(int size) { ArrayList l = new ArrayList(); int[] current = new int[size]; for (int i = 0; i < current.length; i++) { current[i] = 1; } int[] end = new int[size]; for (int i = 0; i < end.length; i++) { end[i] = 9; } l.add(Arrays.copyOf(current, size)); while (!Arrays.equals(current, end)) { incrementWithoutRepetition(current, current.length - 1); l.add(Arrays.copyOf(current, size)); } int [][] combination = new int[l.size()][size]; for (int i=0; i<l.size(); i++) combination[i] = (int[])l.get(i); return l; } static int incrementWithoutRepetition(int[] n, int index) { if (n[index] != 9) { n[index]++; return n[index]; } else { n[index] = incrementWithoutRepetition(n, index - 1); return n[index]; } } static void p(int[] n) { for (int i = 0; i < n.length; i++) { System.out.print(n[i] + " "); } System.out.println(""); } }

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  • Showing IPhone keyboard in different languages based on user input.

    - by itsaboutcode
    Hi, My question is related to the following question, and can be said almost same. http://stackoverflow.com/questions/330542/setting-the-iphone-keyboard-language But here are my requirement. I am writing dictionary app for IPhone, which support multiple languages. So my requirement is to display the English keyboard when user has selected English language and show Dutch keyboard when user has selected Dutch and so on. So i was wondering if this is possible? Thanks.

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  • Merging two XML files into one XML file using Java

    - by dmurali
    I am stuck with how to proceed with combining two different XML files(which has the same structure). When I was doing some research on it, people say that XML parsers like DOM or StAX will have to be used. But cant I do it with the regular IOStream? I am currently trying to do with the help of IOStream but this is not solving my purpose, its being more complex. For example, What I have tried is; public class GUI { public static void main(String[] args) throws Exception { // Creates file to write to Writer output = null; output = new BufferedWriter(new FileWriter("C:\\merged.xml")); String newline = System.getProperty("line.separator"); output.write(""); // Read in xml file 1 FileInputStream in = new FileInputStream("C:\\1.xml"); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String strLine; while ((strLine = br.readLine()) != null) { if (strLine.contains("<MemoryDump>")){ strLine = strLine.replace("<MemoryDump>", "xmlns:xsi"); } if (strLine.contains("</MemoryDump>")){ strLine = strLine.replace("</MemoryDump>", "xmlns:xsd"); } output.write(newline); output.write(strLine); System.out.println(strLine); } // Read in xml file 2 FileInputStream in = new FileInputStream("C:\\2.xml"); BufferedReader br1 = new BufferedReader(new InputStreamReader(in)); String strLine1; while ((strLine1 = br1.readLine()) != null) { if (strLine1.contains("<MemoryDump>")){ strLine1 = strLine1.replace("<MemoryDump>", ""); } if (strLine1.contains("</MemoryDump>")){ strLine1 = strLine1.replace("</MemoryDump>", ""); } output.write(newline); output.write(strLine1); I request you to kindly let me know how do I proceed with merging two XML files by adding additional content as well. It would be great if you could provide me some example links as well..! Thank You in Advance..! System.out.println(strLine1); } }

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  • How do I sort an array of Person Objects by using compareto()?

    - by Adam
    Here is my code: > import java.util.Scanner; import java.util.Arrays; /** This class tests the Person class. */ public class PersonDemo { public static void main(String[] args) { int count = 0; Scanner in = new Scanner(System.in); boolean more = false; Person first = null; Person last = null; while (more) { System.out.println( "Please enter the person's name or a blank line to quit"); String name = in.nextLine(); if (name.equals("")) more = false; else { Person p = new Person(name); //new person object created with inputted name Person[] people = new Person[10]; //new array of 10 person objects people[count] = p; //declare person object with index of variable count as the new person object first = people[count]; // I have no idea what to do here. This is where I'm stuck. last = people[count]; // I can't figure out what to do with this either. first.compareTo(p); //call compareTo method on first and new person object last.compareTo(p); //call compareTo method on last and new person object count++; // increase count variable } } System.out.println("First: " + first.toString()); System.out.println("Last: " + last.toString()); } } And the Person class: /** A person with a name. */ public class Person implements Comparable { /** * Constructs a Person with a name. * @param aName the person's name */ public Person(String aName) { name = aName; } public String getName() { return name; } @Override public int compareTo(Object otherObject) { Person other = (Person)otherObject; if (name.compareTo(other.name) < 0) return -1; if (name.compareTo(other.name) > 0) return 1; return 0; } /** Returns a string representation of the object. @return name of Person */ public String toString() { return "[name=" + name + "]"; } private String name; }

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  • Scala: "using" keyword

    - by Albert Cenkier
    i've defined 'using' keyword as following: def using[A, B <: {def close(): Unit}] (closeable: B) (f: B => A): A = try { f(closeable) } finally { closeable.close() } i can use it like that: using(new PrintWriter("sample.txt")){ out => out.println("hellow world!") } now i'm curious how to define 'using' keyword to take any number of parameters, and be able to access them separately: using(new BufferedReader(new FileReader("in.txt")), new PrintWriter("out.txt")){ (in, out) => out.println(in.readLIne) }

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  • DoubleAnimation in ScaleTransform

    - by Adam S
    I'm trying, as an exhibition, to use a DoubleAnimation on the ScaleX and ScaleY properties of a ScaleTransform. I have a rectangle (144x144) which I want to make rectangular over five seconds. My XAML: <Window x:Class="ScaleTransformTest.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300" Loaded="Window_Loaded"> <Grid> <Rectangle Name="rect1" Width="144" Height="144" Fill="Aqua"> <Rectangle.RenderTransform> <ScaleTransform ScaleX="1" ScaleY="1" /> </Rectangle.RenderTransform> </Rectangle> </Grid> </Window> My C#: private void Window_Loaded(object sender, RoutedEventArgs e) { ScaleTransform scaly = new ScaleTransform(1, 1); rect1.RenderTransform = scaly; Duration mytime = new Duration(TimeSpan.FromSeconds(5)); Storyboard sb = new Storyboard(); DoubleAnimation danim1 = new DoubleAnimation(1, 1.5, mytime); DoubleAnimation danim2 = new DoubleAnimation(1, 0.5, mytime); sb.Children.Add(danim1); sb.Children.Add(danim2); Storyboard.SetTarget(danim1, scaly); Storyboard.SetTargetProperty(danim1, new PropertyPath(ScaleTransform.ScaleXProperty)); Storyboard.SetTarget(danim2, scaly); Storyboard.SetTargetProperty(danim2, new PropertyPath(ScaleTransform.ScaleYProperty)); sb.Begin(); } Unfortunately, when I run this program, it does nothing. The rectangle stays at 144x144. If I do away with the animation, and just ScaleTransform scaly = new ScaleTransform(1.5, 0.5); rect1.RenderTransform = scaly; it will elongate it instantly, no problem. There is a problem elsewhere. Any suggestions? I have read the discussion at http://www.eggheadcafe.com/software/aspnet/29220878/how-to-animate-tofrom-an.aspx in which someone seems to have gotten a pure-XAML version working, but the code is not shown there. EDIT: At http://stackoverflow.com/questions/2131797/applying-animated-scaletransform-in-code-problem it seems someone had a very similar problem, I am fine with using his method that worked, but what the heck is that string thePath = "(0).(1)[0].(2)"; all about? What are those numbers representing?

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  • ASP.NET MVC, Webform hybrid

    - by Greg Ogle
    We (me and my team) have a ASP.NET MVC application and we are integrating a page or two that are Web Forms. We are trying to reuse the Master Page from our MVC part of the app in the WebForms part. We have found a way of rendering an MVC partial view in web forms, which works great, until we try and do a postback, which is the reason for using a WebForm. The Error: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. The Code to render the partial view from a WebForm (credited to "How to include a partial view inside a webform"): public static class WebFormMVCUtil { public static void RenderPartial(string partialName, object model) { //get a wrapper for the legacy WebForm context var httpCtx = new HttpContextWrapper(System.Web.HttpContext.Current); //create a mock route that points to the empty controller var rt = new RouteData(); rt.Values.Add("controller", "WebFormController"); //create a controller context for the route and http context var ctx = new ControllerContext( new RequestContext(httpCtx, rt), new WebFormController()); //find the partial view using the viewengine var view = ViewEngines.Engines.FindPartialView(ctx, partialName).View; //create a view context and assign the model var vctx = new ViewContext(ctx, view, new ViewDataDictionary { Model = model }, new TempDataDictionary()); //ERROR OCCURS ON THIS LINE view.Render(vctx, System.Web.HttpContext.Current.Response.Output); } } My only experience with this error is in context of a web farm, which is not the case. Also, I understand that the machine key is used for decrypting the ViewState. Any information on how to diagnose this issue would be appreciated. A Work-around: So far the work-around is to move the header content to a PartialView, then use an AJAX call to call a page with just the Partial View from the WebForms, and then using the PartialView directly on the MVC Views. Also, we are still able to share non-tech-specific parts of the Master Page, i.e. anything that is not MVC specific. Still yet, this is not an ideal solution, a server-side solution is still desired. Also, this solutino has issues when working with controls that have more sophisticated controls, using JavaScript, particularly dynamically generated script as used by 3rd party controls.

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  • How to Render Partial View into an Object

    - by DaveDev
    Hi all, I have the following code: public ActionResult SomeAction() { return new JsonpResult { Data = new { Widget = "some partial html for the widget" } }; } I'd like to modify it so that I could have public ActionResult SomeAction() { // will render HTML that I can pass to the JSONP result to return. var partial = RenderPartial(viewModel); return new JsonpResult { Data = new { Widget = partial } }; } is this possible? Could somebody explain how?

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  • Code Golf: Evaluating Mathematical Expressions

    - by Noldorin
    Challenge Here is the challenge (of my own invention, though I wouldn't be surprised if it has previously appeared elsewhere on the web). Write a function that takes a single argument that is a string representation of a simple mathematical expression and evaluates it as a floating point value. A "simple expression" may include any of the following: positive or negative decimal numbers, +, -, *, /, (, ). Expressions use (normal) infix notation. Operators should be evaluated in the order they appear, i.e. not as in BODMAS, though brackets should be correctly observed, of course. The function should return the correct result for any possible expression of this form. However, the function does not have to handle malformed expressions (i.e. ones with bad syntax). Examples of expressions: 1 + 3 / -8 = -0.5 (No BODMAS) 2*3*4*5+99 = 219 4 * (9 - 4) / (2 * 6 - 2) + 8 = 10 1 + ((123 * 3 - 69) / 100) = 4 2.45/8.5*9.27+(5*0.0023) = 2.68... Rules I anticipate some form of "cheating"/craftiness here, so please let me forewarn against it! By cheating, I refer to the use of the eval or equivalent function in dynamic languages such as JavaScript or PHP, or equally compiling and executing code on the fly. (I think my specification of "no BODMAS" has pretty much guaranteed this however.) Apart from that, there are no restrictions. I anticipate a few Regex solutions here, but it would be nice to see more than just that. Now, I'm mainly interested in a C#/.NET solution here, but any other language would be perfectly acceptable too (in particular, F# and Python for the functional/mixed approaches). I haven't yet decided whether I'm going to accept the shortest or most ingenious solution (at least for the language) as the answer, but I would welcome any form of solution in any language, except what I've just prohibited above! My Solution I've now posted my C# solution here (403 chars). Update: My new solution has beaten the old one significantly at 294 chars, with the help of a bit of lovely regex! I suspected that this will get easily beaten by some of the languages out there with lighter syntax (particularly the funcional/dynamic ones), and have been proved right, but I'd be curious if someone could beat this in C# still. Update I've seen some very crafty solutions already. Thanks to everyone who has posted one. Although I haven't tested any of them yet, I'm going to trust people and assume they at least work with all of the given examples. Just for the note, re-entrancy (i.e. thread-safety) is not a requirement for the function, though it is a bonus. Format Please post all answers in the following format for the purpose of easy comparison: Language Number of characters: ??? Fully obfuscated function: (code here) Clear/semi-obfuscated function: (code here) Any notes on the algorithm/clever shortcuts it takes.

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