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Pancake Sort is a the colloquial term for the mathematical problem of sorting a disordered stack of pancakes in order of size when a spatula can be inserted at any point in the stack and used to flip all pancakes above it. A pancake number is the minimum number of flips required for a given number o...

To connect to a mongo database from node application we require mongoose. Installing Mongoose Go to the toot of your application and install mongoose by npm install mongoose Next we connect to the database. var mongoose = require('mongoose'); //connect to the test database running on defau...

systemd provides a modern implementation of cron. To execute a script periodical a service and a timer file ist needed. The service and timer files should be placed in /etc/systemd/{system,user}. The service file: [Unit] Description=my script or programm does the very best and this is the descri...

Below is an example of Gstreamer pipeline embedded in a simple gtk window. When run, a small window should appear like this: import gi gi.require_version('Gtk', '3.0') gi.require_version('Gst', '1.0') from gi.repository import Gtk, Gst Gst.init(None) Gst.init_check(None) class GstWidg...

There are different variable types for different purposes. In Visual Basic 6 the following variable types are available: Array Boolean Byte Currency Date Double Integer Long Single String Variant You declare a variable by using the Dim keyword: Dim RandomNumber As Integer If you ...

update <SCHEMA_NAME>.<TABLE_NAME_1> AS A SET <COLUMN_1> = True FROM <SCHEMA_NAME>.<TABLE_NAME_2> AS B WHERE A.<COLUMN_2> = B.<COLUMN_2> AND A.<COLUMN_3> = B.<COLUMN_3>

Monthwise difference between two dates(timestamp) select ( (DATE_PART('year', AgeonDate) - DATE_PART('year', tmpdate)) * 12 + (DATE_PART('month', AgeonDate) - DATE_PART('month', tmpdate)) ) from dbo."Table1" Yearwise difference between two dates...

The following table compares the features available(1) in EF Core and EF6.x. It is intended to give a high level comparison and does not list every feature, or attempt to give details on possible differences between how the same feature works. Creating a ModelEF6.xEF Core 1.0.0Basic modelling (cla...

WKWebView resizes the fonts on web content so that a full-sized web page will fit on the device's form factor. If you want the web text in both portrait and landscape to be similar in size to the user's preferred reading size, you need to set it explicitly. Swift // build HTML header for dynamic t...

import javax.swing.JFrame; import javax.swing.SwingUtilities; import javax.swing.WindowConstants; public class Main { public static void main(String[] args) { SwingUtilities.invokeLater(() -> { JFrame frame = new JFrame("Hello World!"); frame...

Using java.lang.Runnable we make our "Hello World!" example available to Java users with versions dating all the way back to the 1.2 release: import javax.swing.JFrame; import javax.swing.SwingUtilities; import javax.swing.WindowConstants; public class Main { public static void ...

There are two kinds of programs the kernel knows of. A binary program is identified by it's ELF (ExtenableLoadableFormat) header, which is usually produced by a compiler. The second one are scripts of any kind. If a file starts in the very first line with the sequence #! then the next string has to...

First Execute CREATE EXTENSION DBLINK; Then INSERT INTO <SCHEMA_NAME>.<TABLE_NAME_1> SELECT * FROM DBLINK( 'HOST=<IP-ADDRESS> USER=<USERNAME> PASSWORD=<PASSWORD> DBNAME=<DATABASE>', 'SELECT * FROM <SCHEMA_NAME>.<TABLE_NAME_2...

A very useful and logical follow-up to histograms and density plots would be the Empirical Cumulative Distribution Function. We can use the function ecdf() for this purpose. A basic plot produced by the command plot(ecdf(rnorm(100)),main="Cumulative distribution",xlab="x") wo...

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); class Cron extends CI_Controller { /** * This is default constructor of the class */ public function __construct() { parent::__construct(); $this->load->library('input'...

When Accessibility enabled in Utilities Select storyboard. Expand the Utilities Select Identity Inspector Select your element on storyboard Add new Accessibility Identifier (in example addButton) When Accessibility disabled in Utilities Select storyboard. Expand the Utilities Select...

In a test you can disable animations by adding in setUp: app.launchEnvironment = ["animations": "0"] Where app is instance of XCUIApplication.

<canvas id="c" width="400" height="400"></canvas> var canvas = new fabric.Canvas("c"); canvas.on('mouse:up', function () { console.log('Event mouse:up Triggered'); }); canvas.on('mouse:down', function () { console.log('Event mouse:d...

Aliases are named shortcuts of commands, one can define and use in interactive bash instances. They are held in an associative array named BASH_ALIASES. To use this var in a script, it must be run within an interactive shell #!/bin/bash -li # note the -li above! -l makes this behave like a login s...

To generate key pairs using different algorithms and key sizes: final KeyPairGenerator dhGenerator = KeyPairGenerator.getInstance("DiffieHellman"); final KeyPairGenerator dsaGenerator = KeyPairGenerator.getInstance("DSA"); final KeyPairGenerator rsaGenerator = KeyPairGenerator...