Lei Xiao xiaolei

Reading data before application startup in Angular 2

In this demonstration I will show you how to read data in Angular2 final release before application startup. You can use it to read configuration files like you do in other languages like Java, Python, Ruby, Php.

This is how the demonstration will load data:

a) It will read an env file named 'env.json'. This file indicates what is the current working environment. Options are: 'production' and 'development';

b) It will read a config JSON file based on what is found in env file. If env is "production", the file is 'config.production.json'. If env is "development", the file is 'config.development.json'.

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

Last Updated: March 2023

IMPORTANT: Ignore the out-of-date steps below for getting Chromium keys.

Instead, read this up-to-date guide (Jan 2023) written by @LearningToPi.

P.S. Thank you to every contributor below who provided tips over the years on what should be a straightforward process: setting up Chromium for local development.

Long live the web!

PostgreSQL JSON Cheatsheet

Using JSON in Postgres by example.

Quick setup via Docker

Download and install: Docker Toolbox
Open Docker Quickstart Terminal
Start a new postgres container:
docker run --name my-postgres -e POSTGRES_PASSWORD=mysecretpassword -d postgres

Assume the user is on a mobile device iOS Safari (Or other browser), but you want a link to open into any other specific mobile browser app like Chrome, Safari, Firefox, Opera, Arc... How do you do that?

Chrome

To open on Chrome

<a href="googlechrome://example.com">try it on Chrome</a>

check out Chrome iOS Docs for more information

	import UIKit
	import RxSwift
	import RxAlamofire
	import ObjectMapper

	class Post: Mappable {
	var id: Int = 0
	var title: String = ""

	required init?(_ map: Map) {

	extension String {
	var localized: String {
	return NSLocalizedString(self, comment: "")
	}
	}

	// Which allows for:
	"Hello world".localized

	// derived from https://www.veasoftware.com/posts/uipageviewcontroller-in-swift-xcode-62-ios-82-tutorial

	import UIKit

	@UIApplicationMain
	class AppDelegate: UIResponder, UIApplicationDelegate {
	var window: UIWindow?
	func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
	window = UIWindow(frame: UIScreen.mainScreen().bounds)
	window!.rootViewController = ViewController()

	function getCardType(cardNum) {

	if(!luhnCheck(cardNum)){
	return "";
	}
	var payCardType = "";
	var regexMap = [
	{regEx: /^4[0-9]{5}/ig,cardType: "VISA"},
	{regEx: /^5[1-5][0-9]{4}/ig,cardType: "MASTERCARD"},
	{regEx: /^3[47][0-9]{3}/ig,cardType: "AMEX"},

	/**
	* Author: Ats Uiboupin, see https://github.com/jmesnil/stomp-websocket/issues/61
	* it is possible to use other type of WebSockets by using the Stomp.over(ws) method. This method expects an object that conforms to the WebSocket definition.
	* TODO specifi minimal required object structure, see SockJS as an acceptable example: https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/sockjs/sockjs.d.ts#L23
	*/
	declare type StompMinimalWebSocketDefinition = any;
	declare type StompWebSocketDefinition = WebSocket \| StompMinimalWebSocketDefinition \| SockJS;

	declare type StompHeaders = { [key: string ]: string;};
	declare type StompSubscriptions = { [key: string ]: string;};