datt

# Install the MySQL gem:
# gem install mysql2

default: &default
  adapter: mysql2
  encoding: utf8mb4
  reconnect: false
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: root
  password:

datt

class TicTacToeBoard
    SYMBOLS = ['X', 'Y']
    WINNING = [
        [0,1,2], [3,4,5], [6,7,8],
        [0,3,6], [1,4,7], [2,5,8],
        [0,4,8], [2,4,6]
    ]
    def initialize()
        @board = [['','',''], ['','',''], ['','','']]
    end

datt

# Rough Algo
# 1. Initialize last_distinct with first character
# 2. Iterate character by character
  # 3. if no repeating char, Push current character in last_distinct
  # 4. Repeat 3 until repeating char found
# 5  if repeating char found
  # 6  if repeating char at first place, drop and rotate
  # 7. if repeating char not at first place, reset with char and set longest.

class LongestDistinctSubstring # Finds length of the longest substring

datt

require 'active_support'
module CRUDActions
  extend ActiveSupport::Concern
  
  included do
    before_action :set_resource, only: [:show, :update, :destroy]
    after_action :set_response_headers, only: [:index]
  end
  
  # Returns count of records matching the scope

datt

How to setup Let's Encrypt for Nginx on Ubuntu 16.04 (including IPv6, HTTP/2 and A+ SLL rating)

There are two main modes to run the Let's Encrypt client (called Certbot):

• Standalone: replaces the webserver to respond to ACME challenges
• Webroot: needs your webserver to serve challenges from a known folder.

Webroot is better because it doesn't need to replace Nginx (to bind to port 80).

In the following, we're setting up mydomain.com. HTML is served from /var/www/mydomain, and challenges are served from /var/www/letsencrypt.

datt

#
# File: /etc/logrotate.d/rails
# Test: logrotate -f /etc/logrotate.d/rails
#
/var/www/*/log/*.log {
  daily
  dateext
  notifempty
  missingok
  rotate 30

datt

Setting up a SSL Cert from Comodo

I use Namecheap.com as a registrar, and they resale SSL Certs from a number of other companies, including Comodo.

These are the steps I went through to set up an SSL cert.

Purchase the cert

datt

Options +FollowSymLinks -MultiViews
# Turn mod_rewrite on
RewriteEngine On
RewriteBase /

## don't touch /forum URIs
#RewriteRule ^forums/ - [L,NC]

## hide .php extension snippet

datt

# Add following lines in /etc/environment to fix the warnings.
LANGUAGE=en_US.UTF-8
LC_ALL=en_US.UTF-8
LANG=en_US.UTF-8
LC_TYPE=en_US.UTF-8

datt

#Login from root
adduser deploy
# set a pssowrd if asked.
# Run visudo and add following line 
%deploy ALL=(ALL) NOPASSWD: ALL