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  • Solr Facet Search spring-data-solr

    - by sv1
    I am new to Solr and we are using Spring-data for Solr I have a question may be its too simple but I am unable to comprehend. Basically I need to search on any field but I have a "zip" field as one of the facet fields. I have a Solr repository . (Am not sure if the annotations on the Repository are correct.) public interface MyRepository extends SolrCrudRepository<MyPOJO, String> { @Query(value = "*:*") @Facet(fields={"zip"}) public FacetPage<MyPOJO> findByQueryandAnno(String searchTerm,Pageable page); } In my Service class I am trying to call this methods by Injecting MyRepository like below public class MyService { @Inject MyRepository solrRepo; @Inject SolrTemplate solrTemplate; public FacetPage<MyPOJO> tryFacets(String searchString){ //Here is where I am struggling SimpleFacetQuery query = new SimpleQuery(new SimpleStringCriteria(searchString)); query.setFacetOptions(new FacetOptions("zip")); //Not sure how to get the Pageable object. //But the repository doesnt accept without it. return solrTemplate.queryForPage(query,{Pageable Instance to be passed here}) } From my jUnit I am loading context files needed for Solr and Spring //In jUnit the test method looks like this service.tryFacets("some value"); and it fails with - method not found in the service class at the call to the repository method. *********EDIT**************** As per ChristophStrobl's advice created a copyfield called multivaluedCopyField and the searchString argument works good. But the facet still isnt working...Now my code looks like this. I get the MyPOJO object as response but the facetcount and the faceted values are missing. public interface MyRepository extends SolrCrudRepository<MyPOJO, String> { @Query(value = "*:*") @Facet(fields={"zip"}) public FacetPage<MyPOJO> findByQueryandAnno(String searchTerm,Pageable page); } My service class looks like public class MyService { @Inject MyRepository solrRepo; public FacetPage<MyPOJO> tryFacets(String searchString){ //Here is where I am struggling SimpleFacetQuery query = new SimpleQuery(new SimpleStringCriteria(searchString)).setPageRequest new PageRequest(0,5)); query.setFacetOptions(new FacetOptions("zip")); FacetPage<MyPOJO> facetedPOJO= solrRepo.findByQueryandAnno(searchString,query.getPageRequest()); return facetedPOJO; } My jUnit method call is like service.tryFacets("some value");

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  • while uploading image I get errors in logcat

    - by al0ne evenings
    I am uploading image and also sending some parameters with it. I am getting errors in my logcat while doing so. Here is my code public class Camera extends Activity { ImageView ivUserImage; Button bUpload; Intent i; int CameraResult = 0; Bitmap bmp; public String globalUID; UserFunctions userFunctions; String photoName; InputStream is; int serverResponseCode = 0; ProgressDialog dialog = null; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.camera); userFunctions = new UserFunctions(); globalUID = getIntent().getExtras().getString("globalUID"); Toast.makeText(getApplicationContext(), globalUID, Toast.LENGTH_LONG).show(); ivUserImage = (ImageView)findViewById(R.id.ivUserImage); bUpload = (Button)findViewById(R.id.bUpload); openCamera(); } private void openCamera() { i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(i, CameraResult); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if(resultCode == RESULT_OK) { //set image taken from camera on ImageView Bundle extras = data.getExtras(); bmp = (Bitmap) extras.get("data"); ivUserImage.setImageBitmap(bmp); //Create new Cursor to obtain the file Path for the large image String[] largeFileProjection = { MediaStore.Images.ImageColumns._ID, MediaStore.Images.ImageColumns.DATA }; String largeFileSort = MediaStore.Images.ImageColumns._ID + " DESC"; //final String photoName = MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME; Cursor myCursor = this.managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, largeFileProjection, null, null, largeFileSort); try { myCursor.moveToFirst(); //This will actually give you the file path location of the image. final String largeImagePath = myCursor.getString(myCursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.DATA)); //final String photoName = myCursor.getString(myCursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME)); //Log.e("URI", largeImagePath); File f = new File("" + largeImagePath); photoName = f.getName(); bUpload.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { dialog = ProgressDialog.show(Camera.this, "", "Uploading file...", true); new Thread(new Runnable() { public void run() { runOnUiThread(new Runnable() { public void run() { //tv.setText("uploading started....."); Toast.makeText(getBaseContext(), "File is uploading...", Toast.LENGTH_LONG).show(); } }); if(imageUpload(globalUID, largeImagePath)) { Toast.makeText(getApplicationContext(), "Image uploaded", Toast.LENGTH_LONG).show(); } else { Toast.makeText(getApplicationContext(), "Error uploading image", Toast.LENGTH_LONG).show(); } //Log.e("Response: ", response); //System.out.println("RES : " + response); } }).start(); } }); } finally { myCursor.close(); } //Uri uriLargeImage = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, String.valueOf(imageId)); //String imageUrl = getRealPathFromURI(uriLargeImage); } } public boolean imageUpload(String uid, String imagepath) { boolean success = false; //Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher); Bitmap bitmapOrg = BitmapFactory.decodeFile(imagepath); ByteArrayOutputStream bao = new ByteArrayOutputStream(); bitmapOrg.compress(Bitmap.CompressFormat.JPEG, 90, bao); byte [] ba = bao.toByteArray(); String ba1=Base64.encodeToString(ba, 0); ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); nameValuePairs.add(new BasicNameValuePair("image",ba1)); nameValuePairs.add(new BasicNameValuePair("uid", uid)); try { HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("http://www.example.info/androidfileupload/index.php"); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); HttpResponse response = httpclient.execute(httppost); HttpEntity entity = response.getEntity(); if(response != null) { success = true; } is = entity.getContent(); } catch(Exception e) { Log.e("log_tag", "Error in http connection "+e.toString()); } dialog.dismiss(); return success; } Here is my logcat 06-23 11:54:48.555: E/AndroidRuntime(30601): FATAL EXCEPTION: Thread-11 06-23 11:54:48.555: E/AndroidRuntime(30601): java.lang.OutOfMemoryError 06-23 11:54:48.555: E/AndroidRuntime(30601): at java.lang.String.<init>(String.java:513) 06-23 11:54:48.555: E/AndroidRuntime(30601): at java.lang.AbstractStringBuilder.toString(AbstractStringBuilder.java:650) 06-23 11:54:48.555: E/AndroidRuntime(30601): at java.lang.StringBuilder.toString(StringBuilder.java:664) 06-23 11:54:48.555: E/AndroidRuntime(30601): at org.apache.http.client.utils.URLEncodedUtils.format(URLEncodedUtils.java:170) 06-23 11:54:48.555: E/AndroidRuntime(30601): at org.apache.http.client.entity.UrlEncodedFormEntity.<init>(UrlEncodedFormEntity.java:71) 06-23 11:54:48.555: E/AndroidRuntime(30601): at com.zafar.login.Camera.imageUpload(Camera.java:155) 06-23 11:54:48.555: E/AndroidRuntime(30601): at com.zafar.login.Camera$1$1.run(Camera.java:119) 06-23 11:54:48.555: E/AndroidRuntime(30601): at java.lang.Thread.run(Thread.java:1019) 06-23 11:54:53.960: E/WindowManager(30601): Activity com.zafar.login.DashboardActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@405db540 that was originally added here 06-23 11:54:53.960: E/WindowManager(30601): android.view.WindowLeaked: Activity com.zafar.login.DashboardActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@405db540 that was originally added here 06-23 11:54:53.960: E/WindowManager(30601): at android.view.ViewRoot.<init>(ViewRoot.java:266) 06-23 11:54:53.960: E/WindowManager(30601): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:174) 06-23 11:54:53.960: E/WindowManager(30601): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:117) 06-23 11:54:53.960: E/WindowManager(30601): at android.view.Window$LocalWindowManager.addView(Window.java:424) 06-23 11:54:53.960: E/WindowManager(30601): at android.app.Dialog.show(Dialog.java:241) 06-23 11:54:53.960: E/WindowManager(30601): at android.app.ProgressDialog.show(ProgressDialog.java:107) 06-23 11:54:53.960: E/WindowManager(30601): at android.app.ProgressDialog.show(ProgressDialog.java:90) 06-23 11:54:53.960: E/WindowManager(30601): at com.zafar.login.Camera$1.onClick(Camera.java:110) 06-23 11:54:53.960: E/WindowManager(30601): at android.view.View.performClick(View.java:2538) 06-23 11:54:53.960: E/WindowManager(30601): at android.view.View$PerformClick.run(View.java:9152) 06-23 11:54:53.960: E/WindowManager(30601): at android.os.Handler.handleCallback(Handler.java:587) 06-23 11:54:53.960: E/WindowManager(30601): at android.os.Handler.dispatchMessage(Handler.java:92) 06-23 11:54:53.960: E/WindowManager(30601): at android.os.Looper.loop(Looper.java:130) 06-23 11:54:53.960: E/WindowManager(30601): at android.app.ActivityThread.main(ActivityThread.java:3691) 06-23 11:54:53.960: E/WindowManager(30601): at java.lang.reflect.Method.invokeNative(Native Method) 06-23 11:54:53.960: E/WindowManager(30601): at java.lang.reflect.Method.invoke(Method.java:507) 06-23 11:54:53.960: E/WindowManager(30601): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907) 06-23 11:54:53.960: E/WindowManager(30601): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 06-23 11:54:53.960: E/WindowManager(30601): at dalvik.system.NativeStart.main(Native Method) 06-23 11:54:55.190: I/Process(30601): Sending signal. PID: 30601 SIG: 9

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  • Where should I remove a notification observer?

    - by nevan
    I set up a notification observer in my view controll init method like so: [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(saveState) name:UIApplicationWillResignActiveNotification object:nil]; Where is the best place to call removeObserver:name:object: for this notification. I'm currently calling it in my dealloc method, but wanted to know if that might cause problems.

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  • Call trace in Android

    - by DenMark
    I want to know how to do method tracing for Android applications. I mean, a sequence of calls on each object, not a stack trace. It's very similar to this question (Call trace in java), but on different platforms (jvm-PC vs dvm-Android). I have no control over the start arguments of dalvik, thus I cannot specify a java agent (or am I wrong here?). Is there another way to do method tracing? Thanks!

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  • Spring transaction management breaks hibernate cascade

    - by TimmyJ
    I'm having a problem where the addition of spring's transaction management to an application causes Hibernate to throw the following error: org.hibernate.HibernateException: A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance: org.fstrf.masterpk.domain.ReportCriteriaBean.treatmentArms org.hibernate.engine.Collections.processDereferencedCollection(Collections.java:96) org.hibernate.engine.Collections.processUnreachableCollection(Collections.java:39) org.hibernate.event.def.AbstractFlushingEventListener.flushCollections(AbstractFlushingEventListener.java:218) org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:77) org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26) org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) org.springframework.orm.hibernate3.SpringSessionSynchronization.beforeCommit(SpringSessionSynchronization.java:135) org.springframework.transaction.support.TransactionSynchronizationUtils.triggerBeforeCommit(TransactionSynchronizationUtils.java:72) org.springframework.transaction.support.AbstractPlatformTransactionManager.triggerBeforeCommit(AbstractPlatformTransactionManager.java:905) org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:715) org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:701) org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:321) org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) $Proxy92.saveNewReportCriteria(Unknown Source) org.fstrf.masterpk.domain.logic.MasterPkFacade.saveNewReportCriteria(MasterPkFacade.java:134) org.fstrf.masterpk.controllers.ReportCriteriaController.setupReportType(ReportCriteriaController.java:302) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:413) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:134) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:310) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:297) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511) javax.servlet.http.HttpServlet.service(HttpServlet.java:710) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) I'm using Spring 2.5 and annotations to implement this management. Here is the class containing the saveNewReportCriteria method (which, as can be seen by the stack trace, is causing the error) @Transactional( propagation = Propagation.REQUIRED, isolation = Isolation.DEFAULT, readOnly = false) public class HibernateReportCriteriaDao implements ReportCriteriaDao{ private HibernateTemplate hibernateTemplate; public Integer saveNewReportCriteria(ReportCriteriaBean reportCriteria) { hibernateTemplate.save(reportCriteria); List<Integer> maxIdList = hibernateTemplate.find("SELECT max(id) from ReportCriteriaBean"); logger.info("ID of newly saved list is: " + maxIdList.get(0)); return maxIdList.get(0); } public void setHibernateTemplate(HibernateTemplate hibernateTemplate) { this.hibernateTemplate = hibernateTemplate; } } Then I added the following sections to my configuration files to tell spring that I am using annotation driven transaction management: <bean id="actgDataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="jdbc/actg" /> <property name="resourceRef" value="true" /> </bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="actgDataSource" /> </bean> <tx:annotation-driven/> I'm pretty sure that the de-referencing error is being caused due to the proxy class that Spring AOP creates and uses in order to handle transaction management, but I have no idea how I'd go about fixing it.

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  • Why I get java.net.SocketException: Connection reset

    - by Jammy
    I need sent some requests to server side and get reponse, sometimes when I call specific method to run the flollowing common code, I get one error in line(addToCookieJar(connection);), any idea how this get happened? URL url = new URL(providerURL); HttpURLConnection connection = (HttpURLConnection)url.openConnection(); connection.setRequestMethod("POST"); connection.setDoInput(true); connection.setDoOutput(true); connection.setUseCaches(false); connection.setRequestProperty("Content-Type", "application/octet-stream"); // We understand gzip encoding connection.addRequestProperty("Accept-Encoding", "gzip"); if (cookie != null && cookieHandler != null) { connection.setRequestProperty("Cookie", cookie); } if (cookieHandler == null) { addFromCookieJar(connection); } // Send the request ObjectOutputStream oos = new ObjectOutputStream(connection.getOutputStream()); oos.writeObject(remote.getName()); oos.writeObject(m.getName()); // method name oos.writeObject(m.getParameterTypes()); // formal parameters oos.writeObject(args); // actual parameters oos.flush(); oos.close(); if (cookieHandler == null) { cookieJar.put(new URI(providerURL), connection.getHeaderFields()); } Exception: java.lang.reflect.UndeclaredThrowableException at $Proxy0.updateDocument(Unknown Source) at com.agst.ui.gantt.GanttPanel.doUpdateDocument(GanttPanel.java:1931) at com.agst.ui.gantt.GanttPanel.save(GanttPanel.java:1419) at com.agst.ui.gantt.GanttPanel$4.run(GanttPanel.java:1673) at java.lang.Thread.run(Unknown Source) Caused by: java.net.SocketException: Connection reset at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at com.agst.rmi.RemoteCallHandler.call(RemoteCallHandler.java:196) at com.agst.rmi.RemoteCallHandler.invoke(RemoteCallHandler.java:142) ... 5 more Caused by: java.net.SocketException: Connection reset at java.net.SocketInputStream.read(Unknown Source) at java.io.BufferedInputStream.fill(Unknown Source) at java.io.BufferedInputStream.read1(Unknown Source) at java.io.BufferedInputStream.read(Unknown Source) at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source) at sun.net.www.http.HttpClient.parseHTTP(Unknown Source) at sun.net.www.http.HttpClient.parseHTTP(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getHeaderFields(Unknown Source) at com.agst.rmi.RemoteCallHandler.addToCookieJar(RemoteCallHandler.java:529) at com.agst.rmi.RemoteCallHandler.call(RemoteCallHandler.java:192) ... 6 more

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  • How to get call notification using mobile substrate on iphone?

    - by prathumca
    Hi all, I want to use mobile substrate to "hook" some code into IPhone's "MobileCal" app so that the injected code will send a notification to my app MobileCal gets a call notification. But I'm out of luck and no clue which method need to be replaced by my "hooking" method in the "MobileCal" app. For example, the "MobileLog" and "iRealSMS" has the same functionality and they used mobile substrate to hook their code into "MobileCal" app. If any one has any clue, I would definitely appreciate them.

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  • Accessing inbound HTTP headers in meteor?

    - by Alex K
    I'm working on an application that relies on data that the browser sends within the HTTP headers (and there's no way around this). This also happens to be my first time working with something node.js based, so it's very likely I'm completely missing something simple! Basically what I want to be able to do is call a method on the server from the client, and in that method read the HTTP headers that the client sent.

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  • Recursively find files/directories within a directory

    - by enchilada
    I want to use enumeratorAtURL:includingPropertiesForKeys:options:errorHandler: to do this, as I'm coding under Snow Leopard. I know how to use this method. However, as for my purposes it's not adequate to load the contents lazily, I have the following question: How can I create an object hierarchy (of, say, the custom FileOrDirectory class with the standard children,count,isLeaf attributes) from the information I load from the enumeratorAtURL: method? I need to load this data beforehand, and show it in an outline view, for my purposes.

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  • a script translatable to JavaScript with callback-hell automatic avoider :-)

    - by m1uan
    I looking for "translator" for JavaScript like already is CoffeScript, which will be work for example with forEach (inspired by Groovy) myArray.forEach() -> val, idx { // do something with value and idx } translate to JavaScript myArray.forEach(function(val, idx){ // do something with value and idx }); or something more usefull... function event(cb){ foo()-> err, data1; bar(data1)-> err, data2; cb(data2); } the method are encapsulated function event(cb){ foo(function(err,data1){ bar(data1, function(err, data2) { cb(data2); }); }); } I want ask if similar "compiler" to JavaScript like this even better already doesn't exists? What would be super cool... my code in nodejs looks mostly like this :-) function dealer(cb){ async.parallel([ function(pcb){ async.watterfall([function(wcb){ first(function(a){ wcb(a); }); }, function(a, wcb){ thirt(a, function(c){ wcb(c); }); fourth(a, function(d){ // dealing with “a” as well and nobody care my result }); }], function(err, array_with_ac){ pcb(array_with_ac); }); }, function(pcb){ second(function(b){ pcb(b);}); }], function(err, data){ cb(data[0][0]+data[1]+data[0][1]); // dealing with “a” “b” and “c” not with “d” }); } but, look how beautiful and readable the code could be: function dealer(cb){ first() -> a; second() -> b; third(a) -> c; // dealing with “a” fourth(a) -> d; // dealing with “a” as well and nobody care about my result cb(a+b+c); // dealing with “a” “b” and “c” not with “d” } yes this is ideal case when the translator auto-decide, method need to be run as parallel and method need be call after finish another method. I can imagine it's works Please, do you know about something similar? Thank you for any advice;-)

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  • compile time if && return string reference optimization

    - by Truncheon
    Hi. I'm writing a series classes that inherit from a base class using virtual. They are INT, FLOAT and STRING objects that I want to use in a scripting language. I'm trying to implement weak typing, but I don't want STRING objects to return copies of themselves when used in the following way (instead I would prefer to have a reference returned which can be used in copying): a = "hello "; b = "world"; c = a + b; I have written the following code as a mock example: #include <iostream> #include <string> #include <cstdio> #include <cstdlib> std::string dummy("<int object cannot return string reference>"); struct BaseImpl { virtual bool is_string() = 0; virtual int get_int() = 0; virtual std::string get_string_copy() = 0; virtual std::string const& get_string_ref() = 0; }; struct INT : BaseImpl { int value; INT(int i = 0) : value(i) { std::cout << "constructor called\n"; } INT(BaseImpl& that) : value(that.get_int()) { std::cout << "copy constructor called\n"; } bool is_string() { return false; } int get_int() { return value; } std::string get_string_copy() { char buf[33]; sprintf(buf, "%i", value); return buf; } std::string const& get_string_ref() { return dummy; } }; struct STRING : BaseImpl { std::string value; STRING(std::string s = "") : value(s) { std::cout << "constructor called\n"; } STRING(BaseImpl& that) { if (that.is_string()) value = that.get_string_ref(); else value = that.get_string_copy(); std::cout << "copy constructor called\n"; } bool is_string() { return true; } int get_int() { return atoi(value.c_str()); } std::string get_string_copy() { return value; } std::string const& get_string_ref() { return value; } }; struct Base { BaseImpl* impl; Base(BaseImpl* p = 0) : impl(p) {} ~Base() { delete impl; } }; int main() { Base b1(new INT(1)); Base b2(new STRING("Hello world")); Base b3(new INT(*b1.impl)); Base b4(new STRING(*b2.impl)); std::cout << "\n"; std::cout << b1.impl->get_int() << "\n"; std::cout << b2.impl->get_int() << "\n"; std::cout << b3.impl->get_int() << "\n"; std::cout << b4.impl->get_int() << "\n"; std::cout << "\n"; std::cout << b1.impl->get_string_ref() << "\n"; std::cout << b2.impl->get_string_ref() << "\n"; std::cout << b3.impl->get_string_ref() << "\n"; std::cout << b4.impl->get_string_ref() << "\n"; std::cout << "\n"; std::cout << b1.impl->get_string_copy() << "\n"; std::cout << b2.impl->get_string_copy() << "\n"; std::cout << b3.impl->get_string_copy() << "\n"; std::cout << b4.impl->get_string_copy() << "\n"; return 0; } It was necessary to add an if check in the STRING class to determine whether its safe to request a reference instead of a copy: Script code: a = "test"; b = a; c = 1; d = "" + c; /* not safe to request reference by standard */ C++ code: STRING(BaseImpl& that) { if (that.is_string()) value = that.get_string_ref(); else value = that.get_string_copy(); std::cout << "copy constructor called\n"; } If was hoping there's a way of moving that if check into compile time, rather than run time.

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  • Mustache vs other engines. Maybe I should use another template engine?

    - by marcioAlmada
    I'm passing an object to mustache and this object has a method with one parameter. Is something like this possible with Mustache and PHP? {{object.method(parameter)}} If it gets too laborious to achieve this with Mustache, what template engine would you recommend? Remember I need to pass parameters to object methods while in the view context (like we do with helpers). The nearest as possible to mustache syntax is welcome.

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  • Elapsed time of running a C program

    - by yCalleecharan
    Hi, I would like to know what lines of C code to add to a program so that it tells me the total time that the program takes to run. I guess there should be counter initialization near the beginning of main and one after the main function ends. Is the right header clock.h? Thanks a lot... Update I have a Win Xp machine. Is it just adding clock() at the beginning and another clock() at the end of the program? Then I can estimate the time difference. Yes, you're right it's time.h. Here's my code: #include <stdio.h> #include <stdlib.h> #include <math.h> #include <share.h> #include <time.h> void f(long double fb[], long double fA, long double fB); int main() { clock_t start, end; start = clock(); const int ARRAY_SIZE = 11; long double* z = (long double*) malloc(sizeof (long double) * ARRAY_SIZE); int i; long double A, B; if (z == NULL) { printf("Out of memory\n"); exit(-1); } A = 0.5; B = 2; for (i = 0; i < ARRAY_SIZE; i++) { z[i] = 0; } z[1] = 5; f(z, A, B); for (i = 0; i < ARRAY_SIZE; i++) printf("z is %.16Le\n", z[i]); free(z); z = NULL; end = clock(); printf("Took %ld ticks\n", end-start); printf("Took %f seconds\n", (double)(end-start)/CLOCKS_PER_SEC); return 0; } void f(long double fb[], long double fA, long double fB) { fb[0] = fb[1]* fA; fb[1] = fb[1] - 1; return; } Some errors with MVS2008: testim.c(16) : error C2143: syntax error : missing ';' before 'const' testim.c(18) :error C2143: syntax error : missing ';' before 'type' testim.c(20) :error C2143: syntax error : missing ';' before 'type' testim.c(21) :error C2143: syntax error : missing ';' before 'type' testim.c(23) :error C2065: 'z' : undeclared identifier testim.c(23) :warning C4047: '==' : 'int' differs in levels of indirection from 'void *' testim.c(28) : error C2065: 'A' : undeclared identifier testim.c(28) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data and it goes to 28 errors. Note that I don't have any errors/warnings without your clock codes. LATEST NEWS: I unfortunately didn't get a good reply here. But after a search on Google, the code is working. Here it is: #include <stdio.h> #include <stdlib.h> #include <math.h> #include <share.h> #include <time.h> void f(long double fb[], long double fA, long double fB); int main() { clock_t start = clock(); const int ARRAY_SIZE = 11; long double* z = (long double*) malloc(sizeof (long double) * ARRAY_SIZE); int i; long double A, B; if (z == NULL) { printf("Out of memory\n"); exit(-1); } A = 0.5; B = 2; for (i = 0; i < ARRAY_SIZE; i++) { z[i] = 0; } z[1] = 5; f(z, A, B); for (i = 0; i < ARRAY_SIZE; i++) printf("z is %.16Le\n", z[i]); free(z); z = NULL; printf("Took %f seconds\n", ((double)clock()-start)/CLOCKS_PER_SEC); return 0; } void f(long double fb[], long double fA, long double fB) { fb[0] = fb[1]* fA; fb[1] = fb[1] - 1; return; } Cheers

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  • I'm new to OOP/PHP. What's the practicality of visibility and extensibility in classes?

    - by marcdev
    I'm obviously brand new to these concepts. I just don't understand why you would limit access to properties or methods. It seems that you would just write the code according to intended results. Why would you create a private method instead of simply not calling that method? Is it for iterative object creation (if I'm stating that correctly), a multiple developer situation (don't mess up other people's work), or just so you don't mess up your own work accidentally?

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  • Using interfaces in java..Newb question

    - by Rahul
    Suppose there in an interface Displaceable and a class Circle which implements Displaceable. Displaceable has a method named move() which of course is implemented in Circle. What would happen in the following scenario? Circle a = new Circle(..); Displaceable b = a; b.move() Would the object refer to the Circle's move method?

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  • CSS with PHP Extension ????

    - by raj
    hi everyone,,,plz helpl me out .. i want my css to recognise as mystyle.php but inside code would be of css , and i want to access it in my index.php page with header method ,i dont want to use Link method.

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  • java applet communication port

    - by udhaya
    Communication ports: Change a given class in an applet in that way, that browser-defined proxy-configuration files can be used for applet communication with serve(upload method). i.e browser communicate via port 8080 or via ssl(443) - applet should also communicate by this port automatically. In the given method port 80 is hardcoded. -- please give some code or program for this..

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  • Displaying success/failure messages from hidden iframe submit

    - by Erik Nelson
    I'm using the hidden iframe method to submit a form with a file upload field. I want to display a message back on the page using javascript and I'm not sure how to do this. If this was just a form with text fields I'd do an AJAX post and respond with a message I'd display in my callback function. I'm just not sure how to accomplish this same task with the hidden iframe method since it is a standard form post.

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  • iPhone SDK: Know when tab on Tab Bar is clicked?

    - by Nic Hubbard
    I have a tab bar which displays different views when clicked. When you click a tab for the first time, it calls the viewDidLoad method. But, it only calls that the first time. Is there a method that is called when a user clicks back to that tab, since the viewDidLoad won't be called that second time? (I need to do this to update a UITableView when the user clicks back to a tab)

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  • Equivalant of this gradient code in ie css filter

    - by Wiika
    Hi All, i need an equivalent or an alternative for this code in internet explorer using the filter method background: -moz-linear-gradient(center bottom , rgb(132, 133, 132) 0%, rgb(35, 35, 35) 49%, rgb(104, 104, 104) 100%) repeat scroll 0% 0% transparent; the most important thing in the code is the points ( 0% - 49% - 100% ) i believe that the filter method doesn't have points and doesn't accpect more than two parms for the colors , Is there a way to do it in filter or a javascript script for that ? Thanks.

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