piotrgrundas

type EventCallback<Opts extends unknown = any> = Opts extends undefined
  ? (opts?: undefined) => void
  : (opts: Opts) => void;

class EventEmitter<EventType = string> {
  private listeners: Map<EventType, Array<EventCallback>>;

  constructor() {
    this.listeners = new Map();
    this.addListeners = this.addListeners.bind(this);

piotrgrundas

How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.

Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).

piotrgrundas

type Function<T, R> = (value: T) => R;
type Supplier<T> = () => T;
type Consumer<T> = (value: T) => void;

export interface OptionalMonad<T> {
  filter: (predicate: (value?: T) => boolean) => OptionalMonad<T>;
  ifPresent: (consumer: (value?: T) => void) => void;
  isPresent: () => boolean;
  map: <R>(mapper: (value?: T) => R) => OptionalMonad<R>;
  flatMap: <R>(mapper: (value?: T) => OptionalMonad<R>) => OptionalMonad<R>;

piotrgrundas

Django ORM relations

1. Use select_related sparingly

Django's select_related results in an SQL JOIN.

It's very useful when fetching a one-to-one relation:

class User(Model):

piotrgrundas

Instalation

[sudo] apt-get install stunnel

Configuration

cd path/to/django/project

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# Backup
docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

# Restore
cat backup.sql | docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

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# START GUIDE

# Remember to read the comments if you have problems
# I can assure you that the Dropbox files belong to me and are extracted from official Ubuntu packages

# Make sure you copy the whole lines into Terminal. Each command is on one line.
# Open Terminal and become root

sudo -s

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#!/usr/bin/python
# -*-coding:Utf-8 -*
import json
import os
import pickle
import sys
import time
import urllib
import requests
from io import open as iopen

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var CopyWebpackPlugin = require('copy-webpack-plugin');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var path = require('path');
var webpack = require('webpack');

var config = require('./config');


module.exports = {

piotrgrundas

mkdir -p /usr/local/etc/nginx/sites-{enabled,available}
cd /usr/local/etc/nginx/sites-enabled
ln -s ../sites-available/default.conf
ln -s ../sites-available/default-ssl.conf

File locations:

• nginx.conf to /usr/local/etc/nginx/
• default.conf and default-ssl.conf to /usr/local/etc/nginx/sites-available
• homebrew.mxcl.nginx.plist to /Library/LaunchDaemons/