Tutorial by Examples: d

/*! * \class MainMenuListView * \brief The MainMenuListView class is a QListView with a header displayed * on top. */ class MainMenuListView : public QListView { Q_OBJECT /*! * \class Header * \brief The header class is a nested class used to display the hea...

class MainMenuListView; class MainWindow : public QMainWindow { Q_OBJECT public: MainWindow(QWidget* parent = 0); ~MainWindow(); private: MainMenuListView* menuA; MainMenuListView* menuB; MainMenuListView* menuC; };

tf.gather_nd is an extension of tf.gather in the sense that it allows you to not only access the 1st dimension of a tensor, but potentially all of them. Arguments: params: a Tensor of rank P representing the tensor we want to index into indices: a Tensor of rank Q representing the indices into ...

The grid layout is a powerful layout with which you can do an horizontal and vertical layout a once. example: #include "mainwindow.h" #include <QApplication> #include <QMainWindow> #include <QWidget> #include <QVBoxLayout> #include <QPushButton> #inc...

To comment or uncomment code select the lines and use Ctrl + Shift + C or Ctrl + Shift + /

To access the Open Resource dialog use Ctrl + Shift + R. From here you can start typing a resource name and it will find all matches in the workspace, this makes it easier to find a file when you don't know exactly were it is.

Eclipse can generate basic getters and setters for you. Right click in you class file and go to Source - Generate Getters and Setters (ALT+SHIFT+S). This will open a dialog where you can choose which fields you would like to have getters and setters generated for.

hql = "From Employee where id = 22";

QtCreator is, at the moment, the best tool to create a Qt application. In this example, we will see how to create a simple Qt application which manage a button and write text. To create a new application click on File->New File or Project: Then choose the Projects->Application->Qt Widge...

As this is an audio, we don't need a QVideoWidget. So we can do: _player = new QMediaPlayer(this); QUrl file = QUrl::fromLocalFile(QFileDialog::getOpenFileName(this, tr("Open Music"), "", tr(""))); if (file.url() == "") return ; _player->setMedia(f...

$> perl -MFoo::Bar\ 9999 $> Foo::Bar version 9999 required--this is only version 1.1.

With the help of West Wind's wwDotNetBridge, you can easily have access .NET code within a VFP program. The white paper has all the details, but this concise example will help illustrate the basic steps to running a method in a .NET assembly. Note that wwDotNetBridge can directly access simple pro...

Datapump jobs can be monitored using 1. data dictionary views: select * from dba_datapump_jobs; SELECT * FROM DBA_DATAPUMP_SESSIONS; select username,opname,target_desc,sofar,totalwork,message from V$SESSION_LONGOPS where username = 'bkpadmin'; 2. Datapump status: Note down the j...

create or replace directory DATAPUMP_REMOTE_DIR as '/oracle/scripts/expimp';

Commands: expdp <bkpadmin>/<bkp123> parfile=<exp.par> *Please replace the data in <> with appropriate values as per your environment. You can add/modify parameters as per your requirements. In the above example all the remaining parameters are added in parameter files as...

Prerequisite: Prior to user import it is a good practice to drop the schema or table imported. Commands: impdp <bkpadmin>/<bkp123> parfile=<imp.par> *Please replace the data in <> with appropriate values as per your environment. You can add/modify parameters as per...

Source Server [Export Data]Target Server [Import Data]1. Create a datapump folder that will contain the export dump files4. Create a datapump folder that will contain the import dump files2. Login to database schema that will perform the export.5. Login to database schema that will perform the impor...

Once you have SCons running, create a file named SConstruct: print('..Building World') Now run scons: $ scons scons: Reading SConscript files ... ..Building World scons: done reading SConscript files. scons: Building targets ... scons: `.' is up to date. scons: done building targets. S...

In this example you will be modifying the Marital Status drop-down list found on the Contacts form (CR302000): To add new items to the PXStringListAttribute successor The best way to extend drop-down items hard-coded inside an attribute inherited from the PXStringList or PXIntList attribute is b...

Go will throw an error when there is a variable that is unused, in order to encourage you to write better code. However, there are some situations when you really don't need to use a value stored in a variable. In those cases, you use a "blank identifier" _ to assign and discard the assign...