alexanderadam

def alert(color=:default, message)
  colors = {default: 0, black: 30, red: 31, green: 32, orange: 33, blue: 34, magenta: 35, teal: 36, white: 37}
  $stdout.puts "----\e[#{colors[color]}m#{message}\e[0m----"
end

alert :red, 'before all tests'
at_exit { alert :red, 'after all tests' }

require 'minitest/autorun'

alexanderadam

* Shows a message while asserting like: 

ok: [host] => {                  
    "msg": "disk usage 4.2B of total 20.0GB (21.0%) (should exceed limit 90.0%)"
}

* Note this only looks at first mount point on current node
* Fails if disk is near-full
* Last step pushes to a push-based monitoring service, which will alert us if it doesn't get there after some time
* Need to setup a  variable `disk_limit`, which is the max acceptable usage ratio, e.g. set it to 0.8 if you want to keep disks within 80% of max size

alexanderadam

namespace :optimization do
  desc "Provide DB vacuum for production environment"
  task :vacuum => :environment do
    begin
      tables = ActiveRecord::Base.connection.tables
      tables.each do |table|
        ActiveRecord::Base.connection.execute("VACUUM FULL ANALYZE #{table};")
      end
    rescue Exception => exc
      Rails.logger.error("Database VACUUM error: #{exc.message}")

alexanderadam

EasterHegg 18 Workshop: Smart Contracts on Ethereum

Requirements:

• Chrome/ium or Firefox
• Metamask

Coding your first smart contract!

a. Setting up Metamask

alexanderadam

#!/bin/sh
# put this file in /etc/network/if-up.d/
if iwconfig wlp4s0 | grep -c "ESSID:\"WIFIonICE\""
then
    curl -s "https://www.ombord.info/hotspot/hotspot.cgi?connect=&method=login&realm=db_advanced_wifi"
fi

alexanderadam

// Sometimes it's necessary to do a bit of clean-up
Array.prototype.forEach.call(document.querySelectorAll('.js-comment-delete button'), function(el, i) {
  el.removeAttribute('data-confirm');
  el.click();
});

alexanderadam

#!/bin/bash

# get latest docker compose released tag
COMPOSE_VERSION=$(curl -s https://api.github.com/repos/docker/compose/releases/latest | grep 'tag_name' | cut -d\" -f4)

# Install docker-compose
sh -c "curl -L https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose"
chmod +x /usr/local/bin/docker-compose
sh -c "curl -L https://raw.githubusercontent.com/docker/compose/${COMPOSE_VERSION}/contrib/completion/bash/docker-compose > /etc/bash_completion.d/docker-compose"

alexanderadam

#!/usr/bin/env sh

# Download lists, unpack and filter, write to stdout
curl -s https://www.iblocklist.com/lists.php \
  | sed -n "s/.*value='\(http:.*=bt_.*\)'.*/\1/p" \
  | xargs wget -O - \
  | gunzip \
  | egrep -v '^#'

alexanderadam

Keybase proof

I hereby claim:

• I am alexanderadam on github.
• I am alexanderadam (https://keybase.io/alexanderadam) on keybase.
• I have a public key whose fingerprint is B9B4 7015 798D 923C B71D 9A27 E996 062F A880 FCC0

To claim this, I am signing this object:

alexanderadam

require "json"
require "yaml"
require "secure_random"

class SerializableKlass
  YAML.mapping({
    bool:  { type: Bool,    nilable: true},
    float: { type: Float64, nilable: true},
    int:   { type: Int32,   nilable: true},
    str:   { type: String,  nilable: true}