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  • How can c let a function declaration with any parameter type ?

    - by kamil çakir
    I forgot to write void parameter but it works the i put void it gives error it lets this: print(int size,int table[size][size]){ int i,j; printf("-------TABLE-------\n"); for(i = 0;i it says"previos implicit declaration was here " (means the call in main) void print(int size,int table[size][size]){ int i,j; printf("-------TABLE-------\n"); for(i = 0;i

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  • Why do I have to specify pure virtual functions in the declaration of a derived class in Visual C++?

    - by neuviemeporte
    Given the base class A and the derived class B: class A { public: virtual void f() = 0; }; class B : public A { public: void g(); }; void B::g() { cout << "Yay!"; } void B::f() { cout << "Argh!"; } I get errors saying that f() is not declared in B while trying do define void B::f(). Do I have to declare f() explicitly in B? I think that if the interface changes I shouldn't have to correct the declarations in every single class deriving from it. Is there no way for B to get all the virtual functions' declarations from A automatically? EDIT: I found an article that says the inheritance of pure virtual functions is dependent on the compiler: http://www.objectmentor.com/resources/articles/abcpvf.pdf I'm using VC++2008, wonder if there's an option for this.

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  • How to put Listview items into String Array?

    - by user2851687
    Im developing an app and as the title says how to put items of listview into String array, not string array to listview but listview to string array. I've been searching for this but what I only found is putting String array items into listview. Please help me thank you in advance. To clarify this thread, the question is how to put listview items into String array. Thanks. :D Codes public class DailyPlanTab extends Activity implements OnItemClickListener { ListView dailyPlanList; ArrayList<DailyManager> taskList = new ArrayList<DailyManager>(); DatabaseDailyPlan db; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.dailyplan_layout); dailyPlanList = (ListView) findViewById(R.id.lvDailyPlanList); dailyPlanList.setOnItemClickListener(this); ImageView add = (ImageView) findViewById(R.id.ivDailyPlanAdd); add.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent newDailyIntent = new Intent(getApplicationContext(), NewDailyPlan.class); startActivity(newDailyIntent); } }); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); taskList.clear(); db = new DatabaseDailyPlan(getApplicationContext()); db.getWritableDatabase(); ArrayList<DailyManager> tempList = db.getTask(); for (int i = 0; i < tempList.size(); i++) { String getTask = tempList.get(i).getDaily_name(); String getDate = tempList.get(i).getDaily_date(); int getId = tempList.get(i).getDaily_id(); DailyManager dm = new DailyManager(); dm.setDaily_name(getTask); dm.setDaily_date(getDate); dm.setDaily_id(getId); taskList.add(dm); } dailyPlanList.setAdapter(new ListAdapter(this)); // db.close(); } public class ListAdapter extends BaseAdapter { LayoutInflater inflater; ViewHolder viewHolder; public ListAdapter(Context c) { // TODO Auto-generated constructor stub inflater = LayoutInflater.from(c); } @Override public int getCount() { // TODO Auto-generated method stub return taskList.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return position; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub if (convertView == null) { convertView = inflater.inflate(R.layout.row_checklist_item, null); viewHolder = new ViewHolder(); viewHolder.taskTitle = (TextView) convertView .findViewById(R.id.tvCheckListItem); convertView.setTag(viewHolder); } else { viewHolder = (ViewHolder) convertView.getTag(); } viewHolder.taskTitle.setText("" + taskList.get(position).getDaily_name()); return convertView; } } public class ViewHolder { TextView taskTitle, taskDate; } @Override public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { // TODO Auto-generated method stub int taskId = taskList.get(position).getDaily_id(); String taskName = taskList.get(position).getDaily_name(); String taskDate = taskList.get(position).getDaily_date(); Intent newPlan = new Intent(getApplicationContext(), DailyPlan.class); newPlan.putExtra("task_id", taskId); newPlan.putExtra("task_name", taskName); startActivity(newPlan); } next is the information of the item inside the listview public class DailyPlan extends Activity implements OnItemClickListener { final ArrayList<DailyManager> savedItems = new ArrayList<DailyManager>(); ListView checkList; Boolean nextItem = false; TempManager tm; DatabaseTemp dbTemp; Intent i; int taskId = -1; String taskName = " ", taskDate = null; DatabaseDailyPlan db; DailyManager dm; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.saved_dailyplan); checkList = (ListView) findViewById(R.id.lvCheckList); // checkList.setOnItemClickListener(this); try { i = getIntent(); taskId = i.getExtras().getInt("task_id"); taskName = i.getExtras().getString("task_name"); Toast.makeText(getApplicationContext(), "From new id is" + taskId, 5000).show(); } catch (Exception e) { } Button addList = (Button) findViewById(R.id.bAddList); addList.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub // openDialog("", false, -1); } }); if (nextItem) { // openDialog("", false, -1); } } public void refresh() { DailyPlan.this.onResume(); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); savedItems.clear(); dbTemp = new DatabaseTemp(getApplicationContext()); dbTemp.getWritableDatabase(); db = new DatabaseDailyPlan(getApplicationContext()); db.getWritableDatabase(); if (taskId != -1) { // / For Load ArrayList<DailyManager> savedList = db.getList(taskId); for (int i = 0; i < savedList.size(); i++) { String savedListItems = savedList.get(i).getDaily_list(); String savedListTitle = savedList.get(i).getDaily_name(); String savedListDate = savedList.get(i).getDaily_date(); int savedListId = savedList.get(i).getDaily_id(); DailyManager dm = new DailyManager(); dm.setDaily_list(savedListItems); dm.setDaily_name(savedListTitle); dm.setDaily_date(savedListDate); dm.setDaily_id(savedListId); savedItems.add(dm); } } else { // / For New } checkList.setAdapter(new ListAdapter(this)); } public class ListAdapter extends BaseAdapter { LayoutInflater inflater; ViewHolder viewHolder; public ListAdapter(Context c) { // TODO Auto-generated constructor stub inflater = LayoutInflater.from(c); } @Override public int getCount() { // TODO Auto-generated method stub return savedItems.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return position; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub if (convertView == null) { convertView = inflater.inflate(R.layout.row_checklist_item, null); viewHolder = new ViewHolder(); viewHolder.checkListItem = (TextView) convertView .findViewById(R.id.tvCheckListItem); convertView.setTag(viewHolder); } else { viewHolder = (ViewHolder) convertView.getTag(); } viewHolder.checkListItem.setText(savedItems.get(position) .getDaily_list() + position); final int temp = position; return convertView; } } private class ViewHolder { TextView checkListItem; } @Override public void onItemClick(AdapterView<?> arg0, View arg1, int item, long arg3) { // TODO Auto-generated method stub // openDialog(savedItems.get(item).getDaily_name(), true, // savedItems.get(item).getDaily_id()); } }

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  • C++: Template functor cannot deduce reference type

    - by maciekp
    I've got a functor f, which takes a function func and a parameter t of the same type as func. I cannot pass g to f because of compilation error (no matching function for call to f(int&, void (&)(int&)) ). If g would take non-reference parameter g(int s), compilation finishes. Or if I manually specify template parameter f(i, g), compilation also finishes. template<typename T> void f(T t, void (*func)(T)) {} void g(int& s) {} int main(int, char*[]) { int i = 7; f(i, g); // compilation error here return 0; } How can I get deduction to work?

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  • implement AOP for Controllers in Spring 3

    - by tommy
    How do I implement AOP with an annotated Controller? I've search and found two previous posts regarding the problem, but can't seem to get the solutions to work. posted solution 1 posted solution 2 Here's what I have: Dispatch Servlet: <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"> <context:annotation-config/> <context:component-scan base-package="com.foo.controller"/> <bean id="fooAspect" class="com.foo.aop.FooAspect" /> <aop:aspectj-autoproxy> <aop:include name="fooAspect" /> </aop:aspectj-autoproxy> </beans> Controller: @Controller public class FooController { @RequestMapping(value="/index.htm", method=RequestMethod.GET) public String showIndex(Model model){ return "index"; } } Aspect: @Aspect public class FooAspect { @Pointcut("@target(org.springframework.stereotype.Controller)") public void controllerPointcutter() {} @Pointcut("execution(* *(..))") public void methodPointcutter() {} @Before("controllerPointcutter()") public void beforeMethodInController(JoinPoint jp){ System.out.println("### before controller call..."); } @AfterReturning("controllerPointcutter() && methodPointcutter() ") public void afterMethodInController(JoinPoin jp) { System.out.println("### after returning..."); } @Before("methodPointcutter()") public void beforeAnyMethod(JoinPoint jp){ System.out.println("### before any call..."); } } The beforeAnyMethod() works for methods NOT in a controller; I cannot get anything to execute on calls to controllers. Am I missing something?

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  • C++: get const or non-const reference type from trait

    - by maciekp
    I am writing a functor F which takes function of type void (*func)(T) and func's argument arg. Then functor F calls func with arg. I would like F not to copy arg, just to pass it as reference. But then I cannot simply write "void F(void (*func)(T), T&)" because T could be a reference. So I am trying to write a trait, which allows to get proper reference type of T: T -> T& T& -> T& const T -> const T& const T& -> const T& I come up with something like this: template<typename T> struct type_op { typedef T& valid_ref_type; }; template<typename T> struct type_op<T&> { typedef typename type_op<T>::valid_ref_type valid_ref_type; }; template<typename T> struct type_op<const T> { typedef const T& valid_ref_type; }; template<typename T> struct type_op<const T&> { typedef const T& valid_ref_type; }; Which doesn't work for example for void a(int x) { std::cout << x << std::endl; } F(&a, 7); Giving error: invalid initialization of non-const reference of type ‘int&’ from a temporary of type ‘int’ in passing argument 2 of ‘void f(void (*)(T), typename type_op::valid_ref_type) [with T = int]’ How to get this trait to work?

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  • Is glDisableClientState required?

    - by Shawn
    Every example I've come across for rendering array data is similar to the following code, in which in your drawing loop you first call glEnableClientState for what you will be using and when you are done you call glDisableClientState: void drawScene(void) { glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_TEXTURE_COORD_ARRAY); glBindTexture(GL_TEXTURE_2D, texturePointerA); glTexCoordPointer(2, GL_FLOAT, 0,textureCoordA); glVertexPointer(3, GL_FLOAT, 0, verticesA); glDrawElements(GL_QUADS, numPointsDrawnA, GL_UNSIGNED_BYTE, drawIndicesA); glBindTexture(GL_TEXTURE_2D, texturePointerB); glTexCoordPointer(2, GL_FLOAT, 0,textureCoordB); glVertexPointer(3, GL_FLOAT, 0, verticesB); glDrawElements(GL_QUADS, numPointsDrawnB, GL_UNSIGNED_BYTE, drawIndicesB); glDisableClientState(GL_TEXTURE_COORD_ARRAY); glDisableClientState(GL_VERTEX_ARRAY); } In my program I am always using texture coordinates and vertex arrays, so I thought it was pointless to keep enabling and disabling them every frame. I moved the glEnableClientState outside of the loop like so: bool initGL(void) { //... glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_TEXTURE_COORD_ARRAY); } void drawScene(void) { glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glBindTexture(GL_TEXTURE_2D, texturePointerA); glTexCoordPointer(2, GL_FLOAT, 0,textureCoordA); glVertexPointer(3, GL_FLOAT, 0, verticesA); glDrawElements(GL_QUADS, numPointsDrawnA, GL_UNSIGNED_BYTE, drawIndicesA); glBindTexture(GL_TEXTURE_2D, texturePointerB); glTexCoordPointer(2, GL_FLOAT, 0,textureCoordB); glVertexPointer(3, GL_FLOAT, 0, verticesB); glDrawElements(GL_QUADS, numPointsDrawnB, GL_UNSIGNED_BYTE, drawIndicesB); } It seems to work fine. My question is: Do I need to call glDisableClientState somewhere; perhaps when the program is closed?. Also, is it ok to do it like this? Is there something I'm missing since everyone else enables and disables each frame?

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  • Dynamic obfuscation by self-modifying code

    - by Fallout2
    Hi all, Here what's i am trying to do: assume you have two fonction void f1(int *v) { *v = 55; } void f2(int *v) { *v = 44; } char *template; template = allocExecutablePages(...); char *allocExecutablePages (int pages) { template = (char *) valloc (getpagesize () * pages); if (mprotect (template, getpagesize (), PROT_READ|PROT_EXEC|PROT_WRITE) == -1) { perror (“mprotect”); } } I would like to do a comparison between f1 and f2 (so tell what is identical and what is not) (so get the assembly lines of those function and make a line by line comparison) And then put those line in my template. Is there a way in C to do that? THanks Update Thank's for all you answers guys but maybe i haven't explained my need correctly. basically I'm trying to write a little obfuscation method. The idea consists in letting two or more functions share the same location in memory. A region of memory (which we will call a template) is set up containing some of the machine code bytes from the functions, more specifically, the ones they all have in common. Before a particular function is executed, an edit script is used to patch the template with the necessary machine code bytes to create a complete version of that function. When another function assigned to the same template is about to be executed, the process repeats, this time with a different edit script. To illustrate this, suppose you want to obfuscate a program that contains two functions f1 and f2. The first one (f1) has the following machine code bytes Address Machine code 0 10 1 5 2 6 3 20 and the second one (f2) has Address Machine code 0 10 1 9 2 3 3 20 At obfuscation time, one will replace f1 and f2 by the template Address Machine code 0 10 1 ? 2 ? 3 20 and by the two edit scripts e1 = {1 becomes 5, 2 becomes 6} and e2 = {1 becomes 9, 2 becomes 3}. #include <stdlib.h> #include <string.h> typedef unsigned int uint32; typedef char * addr_t; typedef struct { uint32 offset; char value; } EDIT; EDIT script1[200], script2[200]; char *template; int template_len, script_len = 0; typedef void(*FUN)(int *); int val, state = 0; void f1_stub () { if (state != 1) { patch (script1, script_len, template); state = 1; } ((FUN)template)(&val); } void f2_stub () { if (state != 2) { patch (script2, script_len, template); state = 2; } ((FUN)template)(&val); } int new_main (int argc, char **argv) { f1_stub (); f2_stub (); return 0; } void f1 (int *v) { *v = 99; } void f2 (int *v) { *v = 42; } int main (int argc, char **argv) { int f1SIZE, f2SIZE; /* makeCodeWritable (...); */ /* template = allocExecutablePages(...); */ /* Computed at obfuscation time */ diff ((addr_t)f1, f1SIZE, (addr_t)f2, f2SIZE, script1, script2, &script_len, template, &template_len); /* We hide the proper code */ memset (f1, 0, f1SIZE); memset (f2, 0, f2SIZE); return new_main (argc, argv); } So i need now to write the diff function. that will take the addresses of my two function and that will generate a template with the associated script. So that is why i would like to compare bytes by bytes my two function Sorry for my first post who was not very understandable! Thank you

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  • Best ways to write a method that updates two objects in a multithreaded java environment?

    - by DanielHonig
    Suppose we have a class called AccountService that manages the state of accounts. AccountService is defined as interface AccountService{ public void debit(account); public void credit(account); public void transfer(Account account, Account account1); } Given this definition, what is the best way to implement transfer() so that you can guarantee that transfer is an atomic operation. I'm interested in answers that reference Java 1.4 code as well as answers that might use resources from java.util.concurrent in Java 5

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  • TreeView Control Problem

    - by ProgNet
    Hi all, I have a public folder on the server that contains recursively nested sub folders. In the various Leaf folders contains Images. I wanted to create a server side file browser that will display the Images to the user. I am using the ASP.NET TreeView Control. I create the tree nodes using PopulateOnDemand. If the user click on a leaf directory I want the images in that folder to be displayed in a DataList Control. The problem is that when I click on a sub tree node (after I expanded it parent node) All the expanded sub tree disappears and only the parent node is showed with no + sign next to it !! ( I have set the TreeView's PopulateNodesFromClient property to true ) Can someone tell me what is the problem ?? Thanks Here is the code : <asp:TreeView ID="TreeView1" runat="server" AutoGenerateDataBindings="False" onselectednodechanged="TreeView1_SelectedNodeChanged" ontreenodepopulate="TreeView1_TreeNodePopulate"> </asp:TreeView> protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { string path = Server.MapPath("."); PopulateTopNodes(path); } } private void PopulateTopNodes(string pathToRootFolder) { DirectoryInfo dirInfo = new DirectoryInfo(pathToRootFolder); DirectoryInfo[] dirs = dirInfo.GetDirectories(); foreach (DirectoryInfo dir in dirs) { TreeNode folderNode = new TreeNode(dir.Name,dir.FullName); if (dir.GetDirectories().Length > 0) { folderNode.PopulateOnDemand = true; folderNode.Collapse(); } TreeView1.Nodes.Add(folderNode); } } protected void TreeView1_TreeNodePopulate(object sender, TreeNodeEventArgs e) { if (IsCallback == true) { if (e.Node.ChildNodes.Count == 0) { LoadChildNode(e.Node); } } } private void LoadChildNode(TreeNode treeNode) { DirectoryInfo dirInfo = new DirectoryInfo(treeNode.Value); DirectoryInfo[] dirs = dirInfo.GetDirectories(); foreach (DirectoryInfo dir in dirs) { TreeNode folderNode = new TreeNode(dir.Name, dir.FullName); if(dir.GetDirectories().Length>0){ folderNode.PopulateOnDemand = true; folderNode.Collapse(); } treeNode.ChildNodes.Add(folderNode); } } protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e) { // Retrieve the images here }

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  • Getting huge lags when downloading files via Service

    - by Copa
    I have a Service which receives URLs to download. The Service than downloads these URLs and save them to a file on the SD Card. When I put more than 2 items in the download queue my device is unusable. It nearly freezes. Huge lags and so on. Any idea? Sourcecode: private static boolean downloading = false; private static ArrayList<DownloadItem> downloads = new ArrayList<DownloadItem>(); /** * called once when the service started */ public static void start() { Thread thread = new Thread(new Runnable() { @Override public void run() { while (true) { if (downloads.size() > 0 && !downloading) { downloading = true; DownloadItem item = downloads.get(0); downloadSingleFile(item.getUrl(), item.getFile()); } } } }); thread.start(); } public static void addDownload(DownloadItem item) { downloads.add(item); } private static void downloadSuccessfullFinished() { if (downloads.size() > 0) downloads.get(0).setDownloaded(true); downloadFinished(); } private static void downloadFinished() { // remove the first entry; it has been downloaded if (downloads.size() > 0) downloads.remove(0); downloading = false; } private static void downloadSingleFile(String url, File output) { final int maxBufferSize = 4096; HttpResponse response = null; try { response = new DefaultHttpClient().execute(new HttpGet(url)); if (response != null && response.getStatusLine().getStatusCode() == 200) { // request is ok InputStream is = response.getEntity().getContent(); BufferedInputStream bis = new BufferedInputStream(is); RandomAccessFile raf = new RandomAccessFile(output, "rw"); ByteArrayBuffer baf = new ByteArrayBuffer(maxBufferSize); long current = 0; long i = 0; // read and write 4096 bytes each time while ((current = bis.read()) != -1) { baf.append((byte) current); if (++i == maxBufferSize) { raf.write(baf.toByteArray()); baf = new ByteArrayBuffer(maxBufferSize); i = 0; } } if (i > 0) // write the last bytes to the file raf.write(baf.toByteArray()); baf.clear(); raf.close(); bis.close(); is.close(); // download finished get start next download downloadSuccessfullFinished(); return; } } catch (Exception e) { // not successfully downloaded downloadFinished(); return; } // not successfully downloaded downloadFinished(); return; }

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  • C# call a C++ dll get EntryPointNotFoundException

    - by 5YrsLaterDBA
    I was gaven a C++ dll file, a lib file and a header file. I need to call them from my C# application. header file looks like this: class Clog ; class EXPORT_MACRO NB_DPSM { private: string sFileNameToAnalyze ; Clog *pLog ; void write2log(string text) ; public: NB_DPSM(void); ~NB_DPSM(void); void setFileNameToAnalyze(string FileNameToAnalyze) ; int WriteGenbenchData(string& message) ; }; In my C# code, I have those code: internal ReturnStatus correctDataDLL(string rawDataFileName) { if (rawDataFileName == null || rawDataFileName.Length <= 0) { return ReturnStatus.Return_CannotFindFile; } else { setFileNameToAnalyze(rawDataFileName); } string msg = ""; int returnVal = WriteGenbenchData(ref msg); return ReturnStatus.Return_Success; } [DllImport("..\\..\\thirdParty\\cogs\\NB_DPSM.dll")] public static extern void setFileNameToAnalyze(string fileName); [DllImport("..\\..\\thirdParty\\cogs\\NB_DPSM.dll")] public static extern int WriteGenbenchData(ref string message); I got EntryPointNotFoundException at the setFileNameToAnalyze(rawDataFileName); statement. Few questions: do I need to add that lib file into somewhere of my C# project? how? do I need to add the header file into my C# project? how? (no compile error for now) I would like to remove those "..\\..\\thirdParty\\cogs\\" hardcode path. how to this? how to get ride of that EntryPointNotFoundException? thanks,

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  • C# Design Reduce a Long List of Methods

    - by guazz
    I have a simple application that loads data from an XML file to a database. public class EmployeeLoader() { public void LoadEmpoyees() {...} public void LoadSalaries() {...} public void LoadRegistrationData() {...} public void LoadTaxData() {...} } Is it a good idea to have multiple "Load" methods as this looks like a code smell as I have about tweney Load methods? If so, how do I make my code more readable? Each Load method loads data to the corresponding table in the database via a repository?

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  • how to access camera.java in on cick event?

    - by Srikanth Naidu
    hi , i am making a app which takes photo on button click i have camera.java which operates camera and takes photo how to i call it on the below event? public void onClick(DialogInterface arg0, int arg1) { setContentView(R.layout.startcamera); } Camera .java package neuro.com; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.app.Activity; import android.hardware.Camera; import android.hardware.Camera.PictureCallback; import android.hardware.Camera.ShutterCallback; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.FrameLayout; public class CameraDemo extends Activity { private static final String TAG = "CameraDemo"; Camera camera; Preview preview; Button buttonClick; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.startcamera); preview = new Preview(this); ((FrameLayout) findViewById(R.id.preview)).addView(preview); buttonClick = (Button) findViewById(R.id.buttonClick); buttonClick.setOnClickListener( new OnClickListener() { public void onClick(View v) { preview.camera.takePicture(shutterCallback, rawCallback, jpegCallback); } }); Log.d(TAG, "onCreate'd"); } ShutterCallback shutterCallback = new ShutterCallback() { public void onShutter() { Log.d(TAG, "onShutter'd"); } }; /** Handles data for raw picture */ PictureCallback rawCallback = new PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { Log.d(TAG, "onPictureTaken - raw"); } }; /** Handles data for jpeg picture */ PictureCallback jpegCallback = new PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { FileOutputStream outStream = null; try { // write to local sandbox file system // outStream = CameraDemo.this.openFileOutput(String.format("%d.jpg", System.currentTimeMillis()), 0); // Or write to sdcard outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis())); outStream.write(data); outStream.close(); Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { } Log.d(TAG, "onPictureTaken - jpeg"); } }; }

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  • Clean way in GWT/Java to wait for multiple asynchronous events to finish

    - by gerdemb
    What is the best way to wait for multiple asynchronous callback functions to finish in Java before continuing. Specifically I'm using GWT with AsyncCallback, but I think this is a generic problem. Here's what I have now, but surely there is cleaner way... AjaxLoader.loadApi("books", "0", new Runnable(){ public void run() { bookAPIAvailable = true; ready(); }}, null); AjaxLoader.loadApi("search", "1", new Runnable(){ public void run() { searchAPIAvailable = true; ready(); }}, null); loginService.login(GWT.getHostPageBaseURL(), new AsyncCallback<LoginInfo>() { public void onSuccess(LoginInfo result) { appLoaded = true; ready(); } }); private void ready() { if(bookAPIAvailable && searchAPIAvailable && appLoaded) { // Everything loaded } }

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  • Interviews that include Algorithms and Data Structures

    - by EricFromSouthPark
    I want to start looking for jobs in great companies and I have four years of enterprise corporations development, three years with C#.NET and alomst one year with Ruby On Rails, JS, etc... But when I look up interview questions from Google, Amazon, Fog Creek, DropBox, etc... they are really targeted at students that are coming fresh out of college and still remember what was Dynamic Programming and Dijkstra algorithms ... but I don't! :( It has been a while for me ... If a I need a sort algorithm I would either Google it or there already is a library and method that does it for me. So what should I do? Do they realize that this guy is not coming from college and will ask more general questions about software architecture or nop! I should go back find my old Data structures book from the storage and read them? In that case wht books and language do you recommend to hone my skills?

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  • Exception throws: encapsulate them or not?

    - by Simon
    Hi there. Once I read an MSDN article that encouraged the following programming paradigm: public class MyClass { public void Method1() { NewCustomException(); } public void Method2() { NewCustomException(); } void NewCustomException() { throw new CustomException("Exception message"); } } Do you think this paradigm makes sense? Wouldn't it be enough to store the exception message in a static const field and then pass it to the exception's constructor, instead of encapsulating the whole exception throw?

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  • SWT Browser Drag and Drop

    - by scottalas
    I'm trying to use drag-n-drop with an embedded SWT Browser, so that my application can drag hyperlinks from the Browser to another Control. I've been able to set up the destination to receive data from an external browser, but the internal does not seem to participate in the drag-n-drop. Any ideas? I would guess that I need something like a selection listener to track when something is grabbed in the browser, or some way to ask the browser what is currently selected, perhaps using javascript. My current setup of the Browser is simplistic, looking like this: browser = new Browser(top, SWT.NONE); // MOZILLA createDragSource(browser); // below // a selection listener never receives events: browser.addListener(SWT.Selection, new Listener() { @Override public void handleEvent(Event event) { System.out.println("Selection listener event"); } }); ... private void createDragSource(final Browser browser) { Transfer[] types = new Transfer[] { URLTransfer.getInstance(), HTMLTransfer.getInstance(), TextTransfer.getInstance(), ImageTransfer.getInstance(), }; int mode = DND.DROP_COPY | DND.DROP_LINK | DND.DROP_MOVE; DragSource dragSource = new DragSource(browser, mode); dragSource.setTransfer(types); dragSource.addDragListener(new DragSourceListener() { public void dragStart(DragSourceEvent event) { System.out.println("source.dragStart"); } public void dragSetData(DragSourceEvent event) { System.out.println("source.dragSetData"); // Is there a way to get the Browser's drag item here? } public void dragFinished(DragSourceEvent event) { System.out.println("source.dragFinished"); //do nothing } }); } Thanks for any help!

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  • Unreasonable errors in merge sort

    - by Alexxx
    i have the following errors - please help me to find the error: 9 IntelliSense: expected a '}' 70 4 it points on the end of the code - but there are no open { anywhere!! so why?? 8 IntelliSense: expected a ';' 57 1 it points on the { after the void main but why to put ; after the { of the void main?? Error 7 error C1075: end of file found before the left brace '{' at 70 1 points to the beginig of the code - why??? #include <stdio.h> #include <stdlib.h> void merge(int *a,int p,int q,int r) { int i=p,j=q+1,k=0; int* temp=(int*)calloc(r-p+1, sizeof(int)); while ((i<=q)&& (j<=r)) if(a[i]<a[j]) temp[k++]=a[i++]; else temp[k++]=a[j++]; while(j<=r) // if( i>q ) temp[k++]=a[j++]; while(i<=q) // j>r temp[k++]=a[i++]; for(i=p,k=0;i<=r;i++,k++) // copy temp[] to a[] a[i]=temp[k]; free(temp); } void merge_sort(int *a,int first, int last) { int middle; if(first < last) { middle=(first+last)/2; merge_sort(a,first,middle); merge_sort(a,middle+1,last); merge(a,first,middle,last); { } void main() { int a[] = {9, 7, 2, 3, 5, 4, 1, 8, 6, 10}; int i; merge_sort(a, 0, 9); for (i = 0; i < 10; i++) printf ("%d ", a[i]);

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  • How to work around the home directory changing to /root when using sudo?

    - by Nathanel Titane
    Hello everybody! With Natty coming out soon, I've been at work updating my deployment and self-config script to make my desktop on 11.04 run and look the way I want it to. One bummer is that dbus seems to have changed and does not permit, in the same manner Lucid and Maverick did, the authentication of the current user by terminal call using grep and cat. Ideally, to run the script, I would sudo -s and then launch it as # chmod +x install && ./install Instead of returning my user name.. it now returns root and applies changes to the root profile and aborts whenever paths do not correspond. Here is my script header: #!/bin/bash ON_USER=$(echo ~ | awk -F'/' '{ print $1 $2 $3 }' | sed 's/home//g') export $(grep -v "^#" ~/.dbus/session-bus/`cat /var/lib/dbus/machine-id`-0) if sudo -u $ON_USER test -z "$DBUS_SESSION_BUS_ADDRESS" ; then eval `sudo -u $ON_USER dbus-launch --sh-syntax --exit-with-session` fi RELEASE=$(lsb_release -cs) How could I make it return the actual user now that natty is coming? Thanks for the help

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  • How do I simplify these NUNit tests?

    - by Lucas Meijer
    These three tests are identical, except that they use a different static function to create a StartInfo instance. I have this pattern coming up all trough my testcode, and would love to be be able to simplify this using [TestCase], or any other way that reduces boilerplate code. To the best of my knowledge I'm not allowed to use a delegate as a [TestCase] argument, and I'm hoping people here have creative ideas on how to make the code below more terse. [Test] public void ResponseHeadersWorkinPlatform1() { DoResponseHeadersWorkTest(Platform1StartInfo.CreateOneRunning); } [Test] public void ResponseHeadersWorkinPlatform2() { DoResponseHeadersWorkTest(Platform2StartInfo.CreateOneRunning); } [Test] public void ResponseHeadersWorkinPlatform3() { DoResponseHeadersWorkTest(Platform3StartInfo.CreateOneRunning); } void DoResponseHeadersWorkTest(Func<ScriptResource,StartInfo> startInfoCreator) { ScriptResource sr = ScriptResource.Default; var process = startInfoCreator(sr).Start(); //assert some things here }

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  • Events convention - I don't get it

    - by bobjink
    My class with an event: public class WindowModel { public delegate void WindowChangedHandler(object source, WindowTypeEventArgs e); public event WindowChangedHandler WindowChanged; public void GotoWindow(WindowType windowType) { this.currentWindow = windowType; this.WindowChanged.Invoke(this, new WindowTypeEventArgs(windowType)); } } Derived event class: public class WindowTypeEventArgs : EventArgs { public readonly WindowType windowType; public WindowTypeEventArgs(WindowType windowType) { this.windowType = windowType; } } Some other class that register it to the event: private void SetupEvents() { this.WindowModel.WindowChanged += this.ChangeWindow; } private void ChangeWindow(object sender, WindowTypeEventArgs e) { //change window } What have I gained from following the .Net convention? It would make more sense to have a contract like this public delegate void WindowChangedHandler(WindowType windowType); public event WindowChangedHandler WindowChanged; Doing it this way, I don't need to create a new class and is easier to understand. I am not coding a .Net library. This code is only going to be used in this project. I like conventions but am I right when I say that in this example it does not make sense or have i missunderstood something?

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  • -[CCScene setOffsetx:]: unrecognized selector sent to instance

    - by Alexander Sharunov
    please help me, i'm very new in objective-c i've got 2 simplest classes (bellow first, second) i would like to set the offsetx properties of self.rolypoly object in second class like a self.rolypoly.offsetx=1 or run use [self.rolypoly setOffx]; to do somethings, but i always have the errors: trying [self.rolypoly setOffx]; in second class -[CCScene setOffx:]: unrecognized selector sent to instance 0x91d0b70' or trying self.rolypoly.offsetx=1; in second class -[CCScene setOffsetx:]: unrecognized selector sent to instance 0x808bfc0' first class //************************************************************ #import <Foundation/Foundation.h> #import "cocos2d.h" @interface RolyPoly : CCLayer { CCAction *_walkAction; CCSprite *_rolypoly; int offsetx; int offsety; } @property (nonatomic, retain) CCSprite *rolypoly; @property (nonatomic, retain) CCAction *walkAction; @property (nonatomic, assign) int offsetx; @property (nonatomic, assign) int offsety; +(id) scene; -(void) setOffx; @end //************************************************************ #import "GameLayer.h" #import "RolyPoly.h" @implementation RolyPoly @synthesize rolypoly = _rolypoly; @synthesize walkAction = _walkAction; @synthesize offsetx = _offsetx; @synthesize offsety = _offsety; +(id) scene { CCScene *scene = [CCScene node]; RolyPoly *layer = [RolyPoly node]; [scene addChild: layer]; return scene; } -(id) init { if ((self = [super init])) { [self scheduleUpdate]; } return self; } -(void) setOffx { NSLog(@"setOffx"); } -(void) update:(ccTime)delta { } - (void) dealloc { self.rolypoly = nil; self.walkAction = nil; [super dealloc]; } @end second class //************************************************************ #import <Foundation/Foundation.h> #import "cocos2d.h" #import "RolyPoly.h" @interface GameLayer : CCLayer { RolyPoly *_rolypoly; } // returns a CCScene that contains the HelloWorldLayer as the only child +(CCScene *) scene; @property (nonatomic, assign) RolyPoly * rolypoly; @end //************************************************************ #import "GameLayer.h" #import "RolyPoly.h" // HelloWorldLayer implementation @implementation GameLayer @synthesize rolypoly = _rolypoly; +(CCScene *) scene { CCScene *scene = [CCScene node]; GameLayer *layer = [GameLayer node]; [scene addChild: layer]; return scene; } -(id) init { if( (self=[super init])) { CGSize screenSize = [[CCDirector sharedDirector] winSize]; self.rolypoly = [RolyPoly scene]; [self addChild:self.rolypoly z:1]; [self.rolypoly setOffx]; [self scheduleUpdate]; } return self; } - (void)update:(ccTime)dt { } - (void) dealloc { [super dealloc]; } @end

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  • No operations allowed after statement closed issue

    - by Washu
    I have the next methods in my singleton to execute the JDBC connections public void openDB() throws ClassNotFoundException, IllegalAccessException, InstantiationException, SQLException { Class.forName("com.mysql.jdbc.Driver").newInstance(); String url = "jdbc:mysql://localhost/mbpe_peru";//mydb conn = DriverManager.getConnection(url, "root", "admin"); st = conn.createStatement(); } public void sendQuery(String query) throws SQLException { st.executeUpdate(query); } public void closeDB() throws SQLException { st.close(); conn.close(); } And I'm having a problem in a void where i have to call this twice. private void jButton1ActionPerformed(ActionEvent evt) { Main.getInstance().openDB(); Main.getInstance().sendQuery("call insertEntry('"+EntryID()+"','"+SupplierID()+"');"); Main.getInstance().closeDB(); Main.getInstance().openDB(); for(int i=0;i<dataBox.length;i++){ Main.getInstance().sendQuery("call insertCount('"+EntryID()+"','"+SupplierID()+"','"+BoxID()+"'); Main.getInstance().closeDB(); } } I have already tried to keep the connection open and send the 2 querys and after that closed and it didnt work... The only way it worked was to not use the methods, declare the commands for the connection and use different variables for the connection and the statement. I thought that if i close the Connecion and the Statement I could use the variable once again since is a method but I'm not able to. Is there any way to solve this using my methods for the JDBC connection?

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