Tutorial by Examples: e

Ext.define('App.Duck', { extend: 'Ext.Component', alias: 'widget.duck', initComponent: function () { this.callParent(arguments); this._quack(); }, _quack: function () { console.log('The duck says "Quack!"'); this.fireEvent('quack...

// gets the Class objects from the net.mminecraft.server package with the given name public Class<?> getNmsClass(String name) throws ClassNotFoundException { // explode the Server interface implementation's package name into its components String[] packageArray = Bukkit.getServer()....

Touch event handler for surfaces (e.g. SurfaceView, GLSurfaceView, and others): import android.app.Activity; import android.os.Bundle; import android.view.MotionEvent; import android.view.SurfaceView; import android.view.View; public class ExampleClass extends Activity implements View.OnTouc...

public class CustomSurfaceView extends SurfaceView { @Override public boolean onTouchEvent(MotionEvent e) { super.onTouchEvent(e); if(e.getPointerCount() > 2){ return false; // If we want to limit the amount of pointers, we return false //...

A splash screen is just like any other activity, but it can handle all of your startup-needs in the background. Example: Manifest: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="...

NLTK provides the FreqDist class that let's us easily calculate a frequency distribution given a list as input. Here we are using a list of part of speech tags (POS tags) to see which lexical categories are used the most in the brown corpus. import nltk brown_tagged = nltk.corpus.brown.tagged_w...

Parameters can be marked as optional by giving them a default value. Optional parameters can be omitted when calling the function. string greet (string name, string language = "English") { if (language == "English") { return @"Hello, $name!"; } else ...

Value types (structures and enumerations) are passed by value to functions: a copy will be given to the function, not a reference to the variable. So the following function won't do anything. void add_three (int x) { x += 3; } int a = 39; add_three (a); assert (a == 39); // a is still 39...

int sum (int x, ...) { int result = x; va_list list = va_list (); for (int? y = list.arg<int?> (); y != null; y = list.arg<int?> ()) { result += y; } return result; } int a = sum (1, 2, 3, 36); With this function, you can pass as many int as you w...

A key part of the Reader monad is the ask (https://hackage.haskell.org/package/mtl-2.2.1/docs/Control-Monad-Reader.html#v:ask) function, which is defined for illustrative purposes: import Control.Monad.Trans.Reader hiding (ask) import Control.Monad.Trans ask :: Monad m => ReaderT r m r ask ...

This is an official MATLAB example Consider the following code: month = [1;1;2;3;8;1;3;4;9;11;9;12;3;4;11]; temperature = [57;61;60;62;45;59;64;66;40;56;38;65;61;64;55]; maxTemp = accumarray(month,temperature,[],@max); The image below demonstrates the computation process done by accumarray in...

A discriminant of a record type may influence the structure of objects. A choice of components may exists in an object according as a discriminant had had a particular value when the object was created. To support this variation, a record type's definition includes a distinction by cases that depend...

Generic subprograms are usefull to create a subprograms that have the same structure for several types. For example, to swap two objects: generic type A_Type is private; procedure Swap (Left, Right : in out A_Type) is Temp : A_Type := Left; begin Left := Right; Right := Temp; ...

In Ada generic package, upon instantiation, data are duplicated; that is, if they contain global variables, each instance will have its own copy of the variable, properly typed and independent from the others. generic type T is private; package Gen is type C is tagged record V :...

Ada offers a wide variety of generic parameters which is difficult to translate into other languages. The parameters used during instantiation and as a consequence those on which the generic unit may rely on may be variables, types, subprograms, or package instances, with certain properties. For exa...

These exceptions are caused when the type of some object should be different TypeError: [definition/method] takes ? positional arguments but ? was given A function or method was called with more (or less) arguments than the ones it can accept. Example If more arguments are given: def foo(a): re...

Let's see all the basic component for create a simple Hallo World. Define which implementation of JPA 2.1 we will use Build the connection to database creating the persistence-unit Implements the entities Implements DAO (Data access object) for manipulate the entities Test the application ...

Getting elements to center or bottom align vertically has always been a challenge with CSS and Bootstrap. The desired vertical alignment may be within a parent container, or relative to adjacent elements. Now that Bootstrap 4 is flexbox by default there are many different approaches to vertical ali...

It's similar to Vue.js version 1, version 2 can be directly embedded in a single html file. To include Vue.js2 in html file, make sure you have the script file included in the HTML. For example, use the following HTML. It should display the Hello message correctly. <div id="app">{...

This example shows a simple but effective splash screen with animation that can be created by using Android Studio. Step 1: Create an animation Create a new directory named anim in the res directory. Right-click it and create a new Animation Resource file named fade_in.xml: Then, put the follow...