Tutorial by Examples: on

List all collections in database

show collections or show tables or db.getCollectionNames()

MongoDB • Getting database information

Public connection property

Imports System.Data.OleDb Private WithEvents _connection As OleDbConnection Private _connectionString As String = "myConnectionString" Public ReadOnly Property Connection As OleDbConnection Get If _connection Is Nothing Then _co...

Visual Basic .NET Language • Connection Handling

Composition operators

Two useful higher-order functions are the binary application (@@) and reverse-application or "pipe" (|>) operators. Although since 4.01 they're available as primitives, it might still be instructive to define them here: let (|>) x f = f x let (@@) f x = f x Consider the problem ...

OCaml • Higher Order Functions

Using dependency injection

The following syntax allows you to specify dependencies in your module.js instead of explicit specification when using the service //lazy_module.js angular.module('lazy', [ 'alreadyLoadedDependency1', 'alreadyLoadedDependency2', ... [ 'path/to/lazily/loaded/dependency.js', 'path/to/l...

AngularJS • Lazy loading

Minification in Angular

What is Minification ? It is the process of removing all unnecessary characters from source code without changing its functionality. Normal Syntax If we use normal angular syntax for writing a controller then after minifiying our files it going to break our functionality. Controller (Before mini...

AngularJS • Getting started with AngularJS

Basic implementation of Background worker class

You need to import System.ComponentModel for using background worker Imports System.ComponentModel Then Declare a private variable Private bgWorker As New BackgroundWorker You need to create two methods for background worker's DoWork and RunWorkerCompleted events and assign them. Private Su...

Visual Basic .NET Language • Using BackgroundWorker

Considerations

You need to decide what your forest structure is going to look like before you install Active Directory for the first time. Are you to have just one domain in your forest, or are you going to have multiple domains in your forest? Active Directory can support multiple sites. Generally sites are spl...

active-directory • Pre-planning before you create your forest or domain.

Horizontal Pill Menu

<ul class="nav nav-pills"> <li role="presentation" class="active"><a href="#">Home</a></li> <li role="presentation"><a href="#">Profile</a></li> <li role="presentation&q...

twitter-bootstrap • Navigation Menus

Full Width Responsive Horizontal Pill

<ul class="nav nav-tabs nav-justified"> <li role="presentation" class="active"><a href="#">Home</a></li> <li role="presentation"><a href="#">Profile</a></li> <li role="p...

twitter-bootstrap • Navigation Menus

Using MarkupExtension with Converters to skip recource declaration

Usually to use the converter, we have to define it as resource in the following way: <converters:SomeConverter x:Key="SomeConverter"/> It is possible to skip this step by defining a converter as MarkupExtension and implementing the method ProvideValue. The following example conve...

wpf • Value and Multivalue Converters

Use IMultiValueConverter to pass multiple parameters to a Command

It is possible to pass multiple bound values as a CommandParameter using MultiBinding with a very simple IMultiValueConverter: namespace MyProject.Converters { public class Converter_MultipleCommandParameters : MarkupExtension, IMultiValueConverter { public object Convert(object...

wpf • Value and Multivalue Converters

Ionic Framework Hello World App

After All the setup, To make Hello World App To create Simple Blank App, run below command on terminal : ionic start HelloWorld blank // create new project cd HelloWorld // get into HelloWorld directory open the HelloWorld Project in subline/webstrome IDE : Edit ind...

ionic-framework • Getting started with ionic-framework

Basic webpage using bootstrap components

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1">...

twitter-bootstrap • Getting started with twitter-bootstrap

Mongoose connection

Make sure to have mongodb running first! mongod --dbpath data/ package.json "dependencies": { "mongoose": "^4.5.5", } server.js (ECMA 6) import mongoose from 'mongoose'; mongoose.connect('mongodb://localhost:27017/stackoverflow-example'); const db = mon...

Node.js • Database (MongoDB with Mongoose)

Go to member (javaScript function/CSS rule)

Use CTRL+SHIFT+O (⌘+SHIFT+O for mac) to navigate to a javaScript function/CSS rule when viewing a file.

google-chrome-devtools • Getting started with google-chrome-devtools

file manipulation commands

List of commands that will be introduced here: ls #view contents of a directory touch #create new file mkdir #create new directory cp #copy contents of one file to another mv #move file from one location to another rm #delete a file or directory ls examples jennifer@my_co...

unix • Basic console commands

Gentoo/Funtoo Installation

Elixir is available in main packages repository. Update the packages list before installing any package: emerge --sync This is one step installation: emerge --ask dev-lang/elixir

Elixir Language • Installation

Install Jekyll on Linux Mint 18

Install jekyll on Linux Mint 18 with the following steps: sudo apt install ruby sudo apt install build-essential sudo apt install ruby-dev sudo gem install jekyll

jekyll • Getting started with jekyll

Install Jekyll on Windows

Open a command prompt with Administrator access Install Chocolatey: @powershell -NoProfile -ExecutionPolicy Bypass -Command "iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))" && SET PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin Close the comm...

jekyll • Getting started with jekyll

Integrity Validated - Symmetric Key - Encryption and Decryption example using Java

Encryption is used to transform data in its orignal format (Eg: The contents of a letter, Credentials part of authorizing a financial transaction) to something that cannot be easily reconstructed by anyone who is not intended to be part of the conversation. Basically encryption is used to preve...

cryptography • Getting started with cryptography