Tutorial by Examples: bas

Using better Token-based authorization with several client-tokens

The most interesting package for managing real tokens is django-rest-knox which supports multiple tokens per user (and cancelling each token independently), as well as having support for token expiration and several other security mechanisms. django-rest-knox depends on cryptography. You can find m...

django-rest-framework • Authentication

Conversion between JSON and Java objects (basic)

By default, Jackson (the library Play JSON uses) will try to map every public field to a json field with the same name. If the object has getters/setters, it will infer the name from them. So, if you have a Book class with a private field to store the ISBN and have get/set methods named getISBN/setI...

playframework • Java - Working with JSON

Basic HTML Modal

A modal is a dialog window which can be displayed over the current page.  <button type="button" class="btn btn-success btn-lg" data-toggle="modal" data-target="#theModal">Open The Modal</b...

twitter-bootstrap • Modals

Basic Search Parameters with examples:

By default, the full indexed document is returned as part of all searches. This is referred to as the source (_source field in the search hits). If we don’t want the entire source document returned, we have the ability to request only a few fields from within source to be returned, or we can set _so...

Elasticsearch • Getting started with Elasticsearch

State Based Testing

Given this simple class, we can test that the ShaveHead method is working correctly by asserting state of the HairLength variable is set to zero after the ShaveHead method is called. public class Person { public string Name; public int HairLength; public Person(string name, in...

unit-testing • Assertion Types

Integrate Firebase Real-Time database with an Android application

How to implement Firebase Real-Time database in Android applications. Setup/Installation: First, install the Firebase SDK (guide) Register your project using the Firebase console After successfuly completing the two steps above, add the following dependency in your application level ...

firebase-database • Firebase Real-Time Database with Android

Basic example

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twitter-bootstrap • List group

Using a connection pool without database

Achieving multitenancy on database server with multiple databases hosted on it. Multitenancy is common requirement of enterprise application nowadays and creating connection pool for each database in database server is not recommended. so, what we can do instead is create connection pool with datab...

Node.js • Mysql Connection Pool

Basic table

Bootstrap defines a custom styling for table using the .table class. Just add the .table class to any <table> to see horizontal dividers and padding: <table class="table"> <thead><tr><th>First Name</th><th>Last name</th></tr></th...

twitter-bootstrap • Tables

Basic Example

<div class="dropdown"> <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Example <span class="caret"></span></button> <ul class="dropdown-menu"> &...

twitter-bootstrap • Bootstrap Dropdowns

Basic page

A basic VisualForce page can be created like this: <apex:page> <h1>Hello, world!</h1> </apex:page>

Salesforce • Visualforce Page Development

React Native - ListView with Firebase

This is what I do when I'm working with Firebase and I want to use ListView. Use a parent component to retrieve the data from Firebase (Posts.js): Posts.js import PostsList from './PostsList'; class Posts extends Component{ constructor(props) { super(props); this.state =...

react-native • Integration with Firebase for Authentication

List all databases

show dbs or db.adminCommand('listDatabases') or db.getMongo().getDBNames()

MongoDB • Getting database information

List all collections in database

show collections or show tables or db.getCollectionNames()

MongoDB • Getting database information

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

Setting up Firebase for IOS

Firstly, you want to go to firebase dashboard and create a new project using the 'Create New Project' button. You want to create a new project by adding the name of your app for example I put mine as 'Cool app name' then choose your region and press 'Create Project' After creating pr...

firebase • Getting started with firebase

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

Connecting to a database

Given you have a valid CouchDbInstance instance, you connect to a database within CouchDB in the following manner CouchDbConnector connector = dbInstance.createConnector("databaseName", true);

couchdb • Ektorp java client

Getting Started with FirebaseUI

FirebaseUI offers Android, iOS, and Web clients. You can get started with them like so: Android: // app/build.gradle dependencies { // Single target that includes all FirebaseUI libraries compile 'com.firebaseui:firebase-ui:0.5.2' // FirebaseUI Database only compile 'com.f...

firebase • FirebaseUI

A basic flask blueprints example

A minimal Flask application looks something like this: from flask import Flask app = Flask(__name__) @app.route("/") def index(): return "Hello World!" A large Flask application can separate one file into multiple files by blueprints. Purpose Make it easier for ...

Flask • Blueprints