How to Install OpenCV in Ubuntu 18.04 LTS for Python
In this post we will see How to Install OpenCV in Ubuntu for Python OpenCV is an image processing library […]
How to Change Hostname in Ubuntu 18.04 (Change Computer Name)
In this tutorial we will see How to Change Hostname in Ubuntu 18.04. This method will work without the need […]
How to install XAMPP on Ubuntu 18.04
In this post we will see How to install XAMPP in Ubuntu 18.04 LTS. Step 1 : Open the link https://www.apachefriends.org/download.html in […]
How to install Java JDK 10 on Ubuntu 18.04 / Ubuntu 16.04
This Post shows How to install Java JDK 10 on Ubuntu 18.04. In order to install Oracle Java JDK 1o On […]
How Install VirtualBox Guest Additions on Ubuntu 18.04 Guest / virtual machine
The new Ubuntu 18.04 LTS is out now. But VirtualBox Guest Additions software is not working properly after installation. So this […]
JavaFx Sample code (JavaFx Hello world example)
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import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.StackPane; import javafx.stage.Stage; public class HelloWorld extends Application { public static void main(String[] args) { launch(args); } @Override public void start(Stage primaryStage) { primaryStage.setTitle("Hello World!"); Button btn = new Button(); btn.setText("Say 'Hello World'"); btn.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { System.out.println("Hello World!"); } }); StackPane root = new StackPane(); root.getChildren().add(btn); primaryStage.setScene(new Scene(root, 300, 250)); primaryStage.show(); } } |
Scala Tutorial – map, flatMap, flatten and filter (Higher-order Methods)
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// Scala - map and filter object Demo { val lst = List(1, 2, 3, 5, 7, 10, 13); val mymap = Map(1 -> "Tom", 2 -> "Max", 3 -> "John"); def main(args: Array[String]) { println(lst.map(x => x / 0.2)); println(lst.map(x => "hi" * x)); println(mymap.mapValues(x => "hi " + x)); println("hello".map(_.toUpper)); println(List(List(1,2,3), List(3,4,5)).flatten); println(lst.flatMap(x => List(x, x+1))); println(lst.filter(x => x%2!=0)) } } |
How to install XAMPP on Ubuntu 16.04
In this post we will see How to install XAMPP in Ubuntu 16.04. Step 1 : Open the link https://www.apachefriends.org/download.html […]
Scala – Options (Some or None)
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// Scala - Options (Some or None) object Demo { val lst = List(1, 2, 3); val map = Map(1 -> "Tom", 2 -> "Max", 3 -> "John"); val opt : Option[Int] = Some(55); def main(args: Array[String]) { println(lst.find(_ > 2).getOrElse(0)); println(map.get(5).getOrElse("No_name_found")); println(opt.isEmpty) println(opt.get) } } /* 3 No_name_found false 55 */ |
Scala – Tuples
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// Scala - Tuples object Demo { val mytuple = (1, 2, "hello", true); val mytuple2 = new Tuple3(1, 2, "hello"); val mytuple3 = new Tuple3(1, "hello", (2,3)); def main(args: Array[String]) { println(mytuple._1); println(mytuple._2); println(mytuple._3); println(mytuple._4); println(mytuple2._3); mytuple.productIterator.foreach{ i => println(i); } println(1 -> "Tom" -> true); println(mytuple3._3._2); } } /* OUTPUT: 1 2 hello true hello 1 2 hello true ((1,Tom),true) 3 */ |
How to Install OpenGL on Ubuntu Linux
What Is OpenGL? OpenGL is a Graphics rendering API which is operating system independent, window system independent and has high-quality […]
Scala – Maps
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// Scala - Maps object Demo { val mymap : Map[Int, String] = Map(801 -> "max", 802 -> "Tom", 804 -> "July"); val mymap2 : Map[Int, String] = Map(805 -> "lua"); def main(args: Array[String]) { println(mymap); println(mymap(801)); println(mymap.keys); println(mymap.values); println(mymap.isEmpty); mymap.keys.foreach { key => println("key " + key); println("Value "+ mymap(key)); } println(mymap.contains(801000)); println(mymap ++ mymap2); println(mymap.size); } } /* output: Map(801 -> max, 802 -> Tom, 804 -> July) max Set(801, 802, 804) MapLike.DefaultValuesIterable(max, Tom, July) false key 801 Value max key 802 Value Tom key 804 Value July false Map(801 -> max, 802 -> Tom, 804 -> July, 805 -> lua) 3 */ |
SQLite C/C++- CREATE Table in SQLite Database using C/C++
SQLite C/C++ – CREATE Table in SQLite Database using C/C++ SQLite C/C++- CREATE Table in SQLite Database using C/C++ […]
SQLite C/C++- CREATE and OPEN SQLite Database using C/C++
SQLite C/C++- CREATE and OPEN SQLite Database using C/C++ Make a C Program file and Name it as main.c […]
Scala – Sets
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// Scala - Sets object Demo { val myset: Set[Int] = Set(1,2,5,8,9,6,4); val myset2: Set[Int] = Set(4,2,9,18,19,16,14); val names: Set[String] = Set("Max", "Tom", "John"); def main(args: Array[String]) { println(myset + 10); println(names("Maxxxx")); println(myset.head); println(myset.tail); println(myset.isEmpty); println(myset ++ myset2); println(myset.++(myset2)) println(myset.&(myset2)); println(myset.intersect(myset2)); println(myset.max); println(myset.min); myset.foreach(println); for (name <- names) { println(name); } } } /* OUTPUT: Set(5, 10, 1, 6, 9, 2, 8, 4) false 5 Set(1, 6, 9, 2, 8, 4) false Set(5, 14, 1, 6, 9, 2, 18, 16, 8, 19, 4) Set(5, 14, 1, 6, 9, 2, 18, 16, 8, 19, 4) Set(9, 2, 4) Set(9, 2, 4) 9 1 5 1 6 9 2 8 4 Max Tom John */ |