kolosek

module Excel
  module Formulas  
    def pmt(rate, nper, pv, fv=0, type=0)
      ((-pv * pvif(rate, nper) - fv ) / ((1.0 + rate * type) * fvifa(rate, nper)))
    end

    def ipmt(rate, per, nper, pv, fv=0, type=0)
      p = pmt(rate, nper, pv, fv, 0);
      ip = -(pv * pow1p(rate, per - 1) * rate + p * pow1pm1(rate, per - 1))
      (type == 0) ? ip : ip / (1 + rate)

kolosek

=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')

kolosek

# Installing librets in Ubuntu 14.04 can actually be fairly painless.  Took me half an hour.
# I followed the instructions found at https://gist.github.com/sarkis/4472012 and made some modifications to keep it current.

cd ~/; mkdir src; cd src # or go to whatever folder you want to build source from
sudo apt-get update && sudo apt-get install build-essential
sudo apt-get install ruby-dev libexpat1-dev libcurl3-dev libboost-dev libboost-filesystem-dev antlr antlr3 libantlr-dev swig libboost-program-options-dev python-dev

# Swig preskociti
Download swig latest, unpack, read install file inside, and install
https://github.com/swig/swig/releases

kolosek

# lib/tasks/db.rake
namespace :db do

  desc "Dumps the database to db/APP_NAME.dump"
  task :dump => :environment do
    cmd = nil
    with_config do |app, host, db, user|
      cmd = "pg_dump --host #{host} --username #{user} --verbose --clean --no-owner --no-acl --format=c #{db} > #{Rails.root}/db/#{app}.dump"
    end
    puts cmd

kolosek

# See http://m.onkey.org/running-rails-performance-tests-on-real-data

# START : HAX HAX HAX
# Load Rails environment in 'test' mode
RAILS_ENV = "test"
require File.expand_path('../../config/environment', __FILE__)

# Re-establish db connection for 'performance' mode
silence_warnings { RAILS_ENV = "performance" }
ActiveRecord::Base.establish_connection

kolosek

require 'ruby-prof'
require 'benchmark'

module BenchmarkHelpers
  PROFILE_OUTPUT_DIR = "profiling"
  def self.safe_filename(name)
    name.gsub(" ", "_")
  end

  def self.example_output_target_file!(example)

kolosek

usage()
{
  echo "./$0 [--verbose]"
}

VERBOSE=0
if [ "$1" == "--verbose" ]; then
  VERBOSE=1
fi 

kolosek

# sets the proxy cache path location, max size 2g
proxy_cache_path  /data/nginx/cache  levels=1:2 keys_zone=STATIC:100m inactive=24h max_size=2g;

# transfers the `Host` header to the backend
proxy_set_header        Host $host;

# uses the defined STATIC cache zone
proxy_cache             STATIC;

# cache 200 10 minutes, 404 1 minute, others status codes not cached

kolosek

MySQL

Getting started:

• http://www.sqlteaching.com/
• https://www.codecademy.com/courses/learn-sql

Related tutorials:

• MySQL-CLI: https://www.youtube.com/playlist?list=PLfdtiltiRHWEw4-kRrh1ZZy_3OcQxTn7P
• Analyzing Business Metrics: https://www.codecademy.com/learn/sql-analyzing-business-metrics

kolosek

module Rack
  # disable CSS3 and jQuery animations in test mode for speed, consistency and avoiding timing issues.
  # Usage for Rails:
  # in config/environments/test.rb
  # config.middleware.use Rack::NoAnimations
  class NoAnimations
    def initialize(app, options = {})
      @app = app
    end