Tutorial by Examples: n

Sometimes a element needs to be created outside of the usual object structure in the fxml. This is where Define Blocks come into play: Contents inside a <fx:define> element are not added to the object created for the parent element. Every child element of the <fx:define> needs a fx:id...

If there are no specific needs, choose x86_64 system images with Google APIs to create the emulator. It works way faster than armeabi-v7a on intel x86 x64 based computers. There are some SDK libraries compiled and designed with ARM architecture. If you try to install them on Intel based emulators...

Table Item The following class contains 2 properties a name (String) and the size (double). Both properties are wrapped in JavaFX properties to allow the TableView to observe changes. import javafx.beans.property.DoubleProperty; import javafx.beans.property.SimpleDoubleProperty; import javafx.be...

The following example encrypts data by using a hybrid cryptosystem consisting of AES GCM and OAEP, using their default parameter sizes and an AES key size of 128 bits. OAEP is less vulnerable to padding oracle attacks than PKCS#1 v1.5 padding. GCM is also protected against padding oracle attacks. ...

Long-running operations must not be run on the JavaFX application thread, since this prevents JavaFX from updating the UI, resulting in a frozen UI. Furthermore any change to a Node that is part of a "live" scene graph must happen on the JavaFX application thread. Platform.runLater can be...

Simple struct C++ signature: typedef struct _PERSON { int age; char name[32]; } PERSON, *LP_PERSON; void GetSpouse(PERSON person, LP_PERSON spouse); C# definition [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] public struct PERSON { public int age; [Ma...

The below examples use the new form API introduced in RC3. pw-change.template.html <form class="container" [formGroup]="pwChangeForm"> <label for="current">Current Password</label> <input id="current" formControlName="curr...

In Java, there is a built-in language-level locking mechanism: the synchronized block, which can use any Java object as an intrinsic lock (i.e. every Java object may have a monitor associated with it). Intrinsic locks provide atomicity to groups of statements. To understand what that means for us, ...

An atomic operation is an operation that is executed "all at once", without any chance of other threads observing or modifying state during the atomic operation's execution. Lets consider a BAD EXAMPLE. private static int t = 0; public static void main(String[] args) { ExecutorSe...

Press Ctrl + v to enter into visual block mode. Use ↑ / ↓ / j / k to select multiple lines. Press Shift + i and start typing what you want. After you press Esc, the text will be inserted into all the lines you selected. Remember that Ctrl+c is not 100% equivalent to Esc and will not work in this...

import pandas as pd chunksize = [n] for chunk in pd.read_csv(filename, chunksize=chunksize): process(chunk) delete(chunk)

Multidimensional arrays are basically arrays containing others arrays as elements. It is represented like [sizeDim1][sizeDim2]..[sizeLastDim]type, replacing sizeDim by numbers corresponding to the length of the dimention, and type by the type of data in the multidimensional array. For example, [2]...

Syntax for pushing to a remote branch git push <remote_name> <branch_name> Example git push origin master

Characteristics of properties : Properties that can be retrieved from an object could have the following characteristics, Enumerable Non - Enumerable own While creating the properties using Object.defineProperty(ies), we could set its characteristics except "own". Properties which...

You can use the following extension method for comparing the contents of two IList< T > instances of the same type. By default the items are compared based on their order within the list and the items themselves, passing false to the isOrdered parameter will compare only the items themselves ...

This example hides the red box (border) if the checkbox is not checked by making use of an IValueConverter. Note: The BooleanToVisibilityConverter used in the example below is a built-in value converter, located in the System.Windows.Controls namespace. XAML: <Window x:Class="StackOverflo...

In order to work with bindings in WPF, you need to define a DataContext. The DataContext tells bindings where to get their data from by default. <Window x:Class="StackOverflowDataBindingExample.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation&q...

INotifyPropertyChanged is an interface used by binding sources (i.e. the DataContext) to let the user interface or other components know that a property has been changed. WPF automatically updates the UI for you when it sees the PropertyChanged event raised. It is desirable to have this interface im...

You can bind to a property on a named element, but the named element must be in scope. <StackPanel> <CheckBox x:Name="MyCheckBox" IsChecked="True" /> <TextBlock Text="{Binding IsChecked, ElementName=MyCheckBox}" /> </StackPanel>

You can bind to a property of an ancestor in the visual tree by using a RelativeSource binding. The nearest control higher in the visual tree which has the same type or is derived from the type you specify will be used as the binding's source: <Grid Background="Blue"> <Grid ...