Tutorial by Examples: e

Most of the time we like to get the total number of occurrence of a column value in a table for example: TABLE NAME : REPORTS ReportNameReportPriceTest10.00 $Test10.00 $Test10.00 $Test 211.00 $Test10.00 $Test 314.00 $Test 314.00 $Test 4100.00 $ SELECT ReportName AS REPORT ...

public class SimpleLoginView extends CustomComponent implements View, Button.ClickListener { public static final String NAME = "login"; private final TextField user; private final PasswordField password; private final Button loginButton; public SimpleLoginView() { setS...

public class SimpleLoginUI extends UI { @Override protected void init(VaadinRequest request) { // // Create a new instance of the navigator. The navigator will attach // itself automatically to this view. // new Navigator(this, this); // // The initial log ...

public class SimpleLoginMainView extends CustomComponent implements View { public static final String NAME = ""; Label text = new Label(); Button logout = new Button("Logout", new Button.ClickListener() { @Override public void buttonClick(ClickEvent event) { ...

int[string] numbers = ["a" : 10, "b" : 20]; assert("a" in numbers); assert("b" in numbers); assert("c" in numbers);

@Theme("mobiletheme") @Widgetset("com.example.myapp.MyAppWidgetSet") @Title("My Mobile App") public class SimplePhoneUI extends UI { @Override protected void init(VaadinRequest request) { // Define a view class MyView extends NavigationView { ...

In C++, code must be declared or defined before usage. For example, the following produces a compile time error: int main() { foo(2); // error: foo is called, but has not yet been declared } void foo(int x) // this later definition is not known in main { } There are two ways to resolve...

This example will guide you how to get playlist data using the YouTube Data API on Android. SHA-1 fingerprint First you need to get an SHA-1 fingerprint for your machine. There are various methods for retrieving it. You can choose any method provided in this Q&A. Google API console and YouTub...

Here a Turtle Graphics Ninja Twist: import turtle ninja = turtle.Turtle() ninja.speed(10) for i in range(180): ninja.forward(100) ninja.right(30) ninja.forward(20) ninja.left(60) ninja.forward(50) ninja.right(30) ninja.penup() ninja.setposit...

The following Codes can be found from Weka course Given iris.arff is loaded in weka, inside Weka Explorer's R console or Weka KnowledgeFlow's R Scripting, you can play with the following codes to make beautiful plots: library(ggplot2) ggplot(rdata, aes(x = petallength)) + geom_density() ...

Implement ICloneable in a class with a twist. Expose a public type safe Clone() and implement object Clone() privately. public class Person : ICloneable { // Contents of class public string Name { get; set; } public int Age { get; set; } // Constructor public Person(string...

The implementation of ICloneable for a struct is not generally needed because structs do a memberwise copy with the assignment operator =. But the design might require the implementation of another interface that inherits from ICloneable. Another reason would be if the struct contains a reference t...

type Props = { posts: Array<Article>, dispatch: Function, children: ReactElement } const AppContainer = ({ posts, dispatch, children }: Props) => ( <div className="main-app"> <Header {...{ posts, dispatch }} /> {children} </...

Go to Explorer, Open iris.arff data, then go to CPython Scripting, Copy and Paste the following lines of codes into Python Scripts: hi = "Hello, CPython of Weka!" hello = hi.upper() iris = py_data info = iris.describe() To see output, go to Python Variables, select hi, for exa...

Files written to with the w command are created/truncated before any commands are run. $ sed 'w created-file' < /dev/null && ls created-file && rm created-file created-file From the standard: Each wfile shall be created before processing begins. Implementations shall suppo...

The length of line-wrapping when using the l command is implementation defined. From the standard: Long lines shall be folded, with the point of folding indicated by writing a followed by a ; the length at which folding occurs is unspecified, but should be appropriate for the output device. ...

Up navigation is done in android by adding android:parentActivityName="" in Manifest.xml to the activity tag. Basically with this tag you tell the system about the parent activity of a activity. How is it done? <uses-permission android:name="android.permission.INTERNET" ...

The following example is tested on Windows 8 pro 64-bit operating system with python 2.7 and scrapy v 1.2. Let assume that we have already installed the scrapy framework. MySQL database that we will use in the following tutorial CREATE TABLE IF NOT EXISTS `scrapy_items` ( `id` bigint(20) UNSIGN...

The System.Collections.Immutable NuGet package provides immutable collection classes. Creating and adding items var stack = ImmutableStack.Create<int>(); var stack2 = stack.Push(1); // stack is still empty, stack2 contains 1 var stack3 = stack.Push(2); // stack2 still contains only one, st...

Setup To start unit testing your Android project using JUnit you need to add the JUnit dependency to your project and you need to create a test source-set which is going to contain the source code for the unit tests. Projects created with Android Studio often already include the JUnit dependency an...