anhkind

# Discover live hosts on a subnet
# nmap -sP -PE -PP -n [subnet in CIDR notation]
nmap -sP -PE -PP -n 192.168.1.0/24

# Scan for installed software and versions
# nmap -sV --version-all [CIDR or IP]
nmap -sV --version-all 192.168.1.0/24

anhkind

class ColorUtil
  class << self
    def lighten hex_color, percent
      adjust :lightness, hex_color, percent
    end

    def darken hex_color, percent
      adjust :lightness, hex_color, percent * -1
    end

anhkind

# initializers/active_admin.rb
module ActiveAdmin
  class ResourceController
    module DataAccess
      # monkey patch to have multiple column sorting as "column1_asc, column2_desc"
      def apply_sorting(chain)
        params[:order] ||= active_admin_config.sort_order

        orders = []
        params[:order].present? && params[:order].split(/\s*,\s*/).each do |fragment|

anhkind

var lastNow         = new Date();
var lastStubbedNow  = new Date(1421224206 * 1000);

var oldDate         = Date;

// stub with new Date function
Date = function () {
  var args = arguments.length > 0 ? Array.prototype.slice.call(arguments) : [getStubbedNow().getTime()];
  args.unshift(null)
  return new ( Function.prototype.bind.apply( oldDate, args ) ) // http://stackoverflow.com/a/8843181/1036829

anhkind

# Details: https://devcenter.heroku.com/articles/heroku-postgres-import-export

# Create postgres role (v13) if not existing yet
createuser -s postgres -U <os-username>

# Dump
heroku pg:backups capture
curl -o latest.dump `heroku pg:backups public-url`

# Restore to local db

anhkind

javascript:(function(){ var file = prompt("Paste URL of the js file here:"); document.body.appendChild(document.createElement('script')).src=file;})()

anhkind

ngrok -log=stdout 80 > ngrok.log &

anhkind

" copy all this into a vim buffer, save it, then...
" source the file by typing :so %
" Now the vim buffer acts like a specialized application for mastering vim

" There are two queues, Study and Known.  Depending how confident you feel
" about the item you are currently learning, you can move it down several
" positions, all the way to the end of the Study queue, or to the Known
" queue.

" type ,, (that's comma comma)

anhkind

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

anhkind

#!/usr/bin/env ruby
exit 0 if ENV["SKIP_TEST"] # set environment SKIP_TEST to skip rspec
require 'pty'
html_path = "/tmp/rspec_results.html"
begin
  puts "Running rspec ..."
  PTY.spawn( "rspec spec --format h > /tmp/rspec_results.html" ) do |stdin, stdout, pid|
  begin
    stdin.each { |line| print line }
  rescue Errno::EIO