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.

Drupal 8/9/10 Cheatsheet

[Update 2024] - Take a look at Drupal at your fingertips. Lot's of great stuff there.

Files, Images and Media

// Load file object
$file = File::load($fid);

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

	// These hashes are for algorithmic use cases, such as bucketing in hashtables, where security isn't
	// needed and 32 or 64 bits is enough (that is, rare collisions are acceptable). These are way simpler
	// than sha1 (and all its deps) or similar, and with a short, clean (base 36 alphanumeric) result.

	// A simple, insecure 32-bit hash that's short, fast, and has no dependencies.
	// Output is always 7 characters.
	// Loosely based on the Java version; see
	// https://stackoverflow.com/questions/6122571/simple-non-secure-hash-function-for-javascript
	const simpleHash = str => {
	let hash = 0;

	#!/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() {
	// ...