Tutorial by Examples: s

DataSource dataSource = ... // JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource); String sql = "SELECT * FROM customer"; SqlRowSet rowSet = jdbcTemplate.queryForRowSet(sql); while(rowSet.next()) { String firstName = rowSet.getString("first_name"); String lastN...

This is a simple RMI example with five Java classes and two packages, server and client. Server Package PersonListInterface.java public interface PersonListInterface extends Remote { /** * This interface is used by both client and server * @return List of Persons * @throws...

Tkinter has three mechanisms for geometry management: place, pack, and grid. The place manager uses absolute pixel coordinates. The pack manager places widgets into one of 4 sides. New widgets are placed next to existing widgets. The grid manager places widgets into a grid similar to a dynamicall...

In addition to libraries defined in EcmaScript language specification and EcmaScript internationalization API specification, d8 also implements the following functions and objects. print(args...): function. Print to stdout. printErr(args...): function. Print to stderr. write(args...): function....

As we all are aware that PHP writes session data into a file at server side. When a request is made to php script which starts the session via session_start(), PHP locks this session file resulting to block/wait other incoming requests for same session_id to complete, because of which the other requ...

WPF does not support displaying anything other than an image as a splash screen out-of-the-box, so we'll need to create a Window which will serve as a splash screen. We're assuming that we've already created a project containing MainWindow class, which is to be the application main window. First of...

WPF does not support displaying anything other than an image as a splash screen out-of-the-box, so we'll need to create a Window which will serve as a splash screen. We're assuming that we've already created a project containing MainWindow class, which is to be the application main window. First of...

Parameters Nullable type hint was added in PHP 7.1 using the ? operator before the type hint. function f(?string $a) {} function g(string $a) {} f(null); // valid g(null); // TypeError: Argument 1 passed to g() must be of the type string, null given Before PHP 7.1, if a parameter has a typ...

# app/channels/application_cable/connection.rb module ApplicationCable class Connection < ActionCable::Connection::Base identified_by :current_user def connect self.current_user = find_verified_user logger.add_tags 'ActionCable', current_user.id # Can replace...

One day I had a conversation with a friend of mine who uses Laravel PHP framework in his job. When I told him that Django has its own all-included HTML CRUD system, for interacting with the database, called Django admin, his eyes popped off! He told me: "It took me months to build an Admin inte...

Create the source file for your new Client Script Create a new JavaScript file using your favorite editor or IDE Add the following source code to your file (original source here) /** * A simple "Hello, World!" example of a Client Script. Uses the `pageInit` * event to wr...

Create the source file for your new Client Script Create a new JavaScript file using your favorite editor or IDE Add the following source code to your file (original source here) define([], function () { /** * A simple "Hello, World!" example of a Client Script. U...

Add the following code in you main program. var cpuprofile = flag.String("cpuprofile", "", "write cpu profile `file`") var memprofile = flag.String("memprofile", "", "write memory profile to `file`") func main() { flag.Parse() ...

var memprofile = flag.String("memprofile", "", "write memory profile to `file`") func main() { flag.Parse() if *memprofile != "" { f, err := os.Create(*memprofile) if err != nil { log.Fatal("could not create mem...

// Sets the CPU profiling rate to hz samples per second // If hz <= 0, SetCPUProfileRate turns off profiling runtime.SetCPUProfileRate(hz) // Controls the fraction of goroutine blocking events that are reported in the blocking profile // Rate = 1 includes every blocking event in the profil...

Open a new Query Window with current connection (Ctrl + N) Toggle between opened tabs (Ctrl + Tab) Show/Hide Results pane (Ctrl + R) Execute highlighted query (Ctrl + E) Make selected text uppercase or lowercase (Ctrl + Shift + U, Ctrl + Shift + L) Intellisense list member and complete word (...

As an example you want to disable pagination in your default index action and get all results in index. How can you do that? It's simple. You should override the index action in your controller like this: public function actions() { $actions = parent::actions(); unset($actions['index'])...

Create training instances from .arff file private static Instances getDataFromFile(String path) throws Exception{ DataSource source = new DataSource(path); Instances data = source.getDataSet(); if (data.classIndex() == -1){ data.setClassIndex(data.numAttributes()...

The sqlite3 module was written by Gerhard Häring. To use the module, you must first create a Connection object that represents the database. Here the data will be stored in the example.db file: import sqlite3 conn = sqlite3.connect('example.db') You can also supply the special name :memory: to ...

Build the APK First of all we need to build the APK. ionic build --release android Generate private Key Then we will create a keystore to sign the APK. keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000 Change my-release-key with ...