Tutorial by Examples: u

SUPPRESS example

SUPPRESS PRINTING

cobol • SUPPRESS statement

UNLOCK record from a file connector

UNLOCK filename-1 RECORDS

cobol • UNLOCK statement

Installation or Setup

Detailed instructions on getting operating-system set up or installed.

operating-system • Getting started with operating-system

Initial Setup To use Stripe for handling payments we need to add the following to the composer.json then run composer update: "laravel/cashier": "~6.0" The following line then needs to be added to config/app.php, the service provider: Laravel\Cashier\CashierServiceProvider ...

Laravel • Cashier

Debugging

Its easy to get lost while debugging the hiearchy. You can use PHP's built in command debug_backtrace. Put the next snippet inside any template you want to debug and view the generated page:

WordPress • Template hierarchy

Up and running with Flower

Flower is a web based tool to monitor Celery. To install Flower, we can use pip as follows: pip install flower To run Flower for proj: celery -A proj flower Now, flower is accessible in: http://localhost:5555

celery • Celery monitoring with Flower

React Routing Async

import React from 'react'; import { Route, IndexRoute } from 'react-router'; import Index from './containers/home'; import App from './components/app'; //for single Component lazy load use this const ContactComponent = () => { return { getComponent: (location, callback)=> { ...

React • React Routing

Displaying GitHub timeline / feeds on your website

This document explains how to display your GitHub feeds/timeline on your website. Example: A live example is available at: https://newtonjoshua.com GitHub timeline: GitHub provides the public timeline for any user in Atom format. You can view your timeline at: https://github.com/{{GitHub...

github • Displaying GitHub timeline / feeds in your Website

Configure webpack

Create a file webpack.config.js in the root of your working directory Filename: webpack.config.js module.exports = { entry: __dirname + "/src/index.jsx", devtool: "source-map", output: { path: __dirname + "/build", filename: "bund...

React • Setting Up React Environment

Configure babel

Create a file .babelrc in the root of our working directory Filename: .babelrc { "presets": ["es2015","react"] }

React • Setting Up React Environment

HTML file to use react component

Setup a simple html file in the root of the project directory Filename: index.html <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> </head> <body> <div id="App"></div> ...

React • Setting Up React Environment

Transpile and bundle your component

Using webpack, you can bundle your component: $ webpack This will create our output file in build directory. Open the HTML page in a browser to see component in action

React • Setting Up React Environment

Using gen_server behavior

A gen_server is a specific finite state machine working like a server. gen_server can handle different type of event: synchronous request with handle_call asynchronous request with handle_cast other message (not defined in OTP specification) with handle_info Synchronous and asynchronous mess...

Erlang Language • gen_server behavior

Simple Key/Value Database

This source code create a simple key/value store service based on map Erlang datastructure. Firstly, we need to define all information concerning our gen_server: -module(cache). -behaviour(gen_server). % our API -export([start_link/0]). -export([get/1, put/2, state/0, delete/1, stop/0]). %...

Erlang Language • gen_server behavior

Introduction

Cryptography is the science of using mathematical constructs (codes) to make communication secure. The field of cryptography is a subset of the field of Information Security. There are many cryptographic operations possible; some best known examples are: Encryption : transforming a plaintext mes...

cryptography • Getting started with cryptography

How to allow reading specific item from group, but prevent listing group members

It is common practice to create groups of items by creating simple value nodes with item ID as key. For example, we can add a user to the group "administrators" by creating a node at /administrators/$user_id with a value true. We don't want anyone to know who administrators are, for securi...

firebase • Database Rules

Installation or Setup

Detailed instructions on getting mono set up or installed.

mono • Getting started with mono

Client side csv download using Blob

function downloadCsv() { var blob = new Blob([csvString]); if (window.navigator.msSaveOrOpenBlob){ window.navigator.msSaveBlob(blob, "filename.csv"); } else { var a = window.document.createElement("a"); a.href = window.URL.createObjectURL(blob, { ...

JavaScript • File API, Blobs and FileReaders

Phaser environment setup (Asp.Net MVC5 - Typescript - Visual Studio 2015)

Create a new ASP.Net Project: Select the empty template: Add two new folders: App and Scripts in the root folder: Add npm configuration file in the root folder: { "version": "1.0.0", "name": "phaser.js.environment.setup", "priva...

phaser-framework • Working with TypeScript

Managing Security

Security was a part of the dark side of the symfony documentation, it has a dedicated component named Security Component. This component is configured in the security.yml file of the main application project. The default configuration is like this one : # app/config/security.yml security: p...

symfony2 • Managing the Symfony firewalls and security