Ihor Vyspiansky vyspiansky

VS Code: Debugging Jest

Sometimes, debugging with console.log is not enough to find out what is happening in the code, as console.log prints only plain objects but neither functions nor objects with circular references. Besides, it's possible you may need to know the context and flow of the code.

Read more about debugging with VS Code in VS Code: Debugging.

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

Amazon ec2 LAMP and FTP installation and setup

Tutorial: Installing a LAMP Web Server on Amazon Linux

Go through this amazon link http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/install-LAMP.html

Associate and Elastic IP address to your EC2 instance.

What's the difference between cascade="remove" and orphanRemoval=true in Doctrine 2

TLDR: The cascade={"remove"} is like a "software" onDelete="CASCADE", and will remove objects from the database only when an explicit call to $em->remove() occurs. Thus, it could result in more than one object being deleted. orphanRemoval can remove objects from the database even if there was no explicit call to ->remove().

I answered this question a few times to different people so I will try to sum things up in this Gist.

Let's take two entities A and B as an example. I will use a OneToOne relationship in this example but it works exactly the same with OneToMany relationships.

class A

	#!/bin/bash

	set -euo pipefail

	openssl req -new -text -passout pass:abcd -subj /CN=localhost -out server.req -keyout privkey.pem
	openssl rsa -in privkey.pem -passin pass:abcd -out server.key
	openssl req -x509 -in server.req -text -key server.key -out server.crt
	chmod 600 server.key
	test $(uname -s) = Linux && chown 70 server.key
	docker run -d --name postgres -e POSTGRES_HOST_AUTH_METHOD=trust -v "$(pwd)/server.crt:/var/lib/postgresql/server.crt:ro" -v "$(pwd)/server.key:/var/lib/postgresql/server.key:ro" postgres:12-alpine -c ssl=on -c ssl_cert_file=/var/lib/postgresql/server.crt -c ssl_key_file=/var/lib/postgresql/server.key

	import std;

	acl whitelist {
	"123.123.123.123";
	"216.3.128.12";
	}

	sub vcl_recv {
	# If not a whitelisted IP, then display maintenance page. Requires std library.
	if(std.ip(regsub(req.http.X-Forwarded-For, "[, ].*$", ""), client.ip) !~ whitelist) {

	/**
	* Lightweight script to detect whether the browser is running in Private mode.
	* @returns {Promise<boolean>}
	*
	* Live demo:
	* @see https://output.jsbin.com/tazuwif
	*
	* This snippet uses Promises. If you want to run it in old browsers, polyfill it:
	* @see https://cdn.jsdelivr.net/npm/es6-promise@4/dist/es6-promise.auto.min.js
	*

	<!doctype html>
	<html lang="en" ng-app="plannerApp">

	<head>
	<title>IT talk - DataArt - Voronezh - Trip Planner</title>

	<link rel="stylesheet"
	href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
	<link rel="stylesheet"
	href="https://rawgit.com/kuhnza/angular-google-places-autocomplete/master/dist/autocomplete.min.css">

	'use strict';
	import Singleton from 'Singleton';

	class ClassA extends Singleton {
	constructor() {
	super();
	}

	singletonMethod1() {
	// ...

	<?
	/**
	* checks if a domain name is valid
	* @param string $domain_name
	* @return bool
	*/
	public static function domain_name($domain_name)
	{
	//FILTER_VALIDATE_URL checks length but..why not? so we dont move forward with more expensive operations
	$domain_len = strlen($domain_name);