stulentsev

str = "Today we (professors + teaching assistants) proctored a midterm exam for a class of about 80 students. There was undoubtedly a 'hardest' question on the exam, since nearly the entire classroom of students asked us how to proceed with that question. To be fair, we didn't give any hints, but it was clear that one had to use a definition to be able to proceed."

res = str.gsub(/\b[[:alpha:]]+\b/) do |word|
  if word.length < 4
    word
  else
    word[0] + # first letter
       word[1..-2].chars.shuffle.join('') +
       word[-1] # last letter
  end

stulentsev

require 'optparse'
require 'open-uri'
require 'json'


if ARGV.length == 0
  puts "Usage: ruby regru.rb --domain NAME --username USER --password PWD"
  puts "Defaults: "
  puts "  domain: google.com"
  puts "  username: test"

stulentsev

# Example output:
#
# Resolved IP addresses for www.reg.ru:
#     31.31.204.42
#     31.31.204.21
#     31.31.205.41
# 
# Loading from 31.31.204.42 took 0.370469 seconds
# Loading from 31.31.204.21 took 1.037444 seconds
# Loading from 31.31.205.41 took 1.38692 seconds

stulentsev

description "start and stop unicorn"
version "1.0"
author "Sergio Tulentsev"


#expect fork

script
  cd /srv/stats/current && /home/sergio/.rvm/bin/r193_bundle exec unicorn_rails -E production -c config/unicorn.rb
end script

stulentsev

# Usage:
#    mongotop --host host --port port | ruby mongotop_handler.rb

require 'curses'
include Curses

def print_stats stats, time_elapsed
  h = stats.length
  w = 130
  win = Window.new(h + 6, w + 6,

stulentsev

#! /usr/bin/env ruby

require 'yaml'
require 'colorize'

filename = ARGV[0]
pattern_text = ARGV[1]

unless filename && pattern_text
  puts "Usage: grep_yaml.rb filename pattern"

stulentsev

require 'awesome_print'

require_relative 'table_evaluator.rb'

def print_test(label, expectation)
  evaluator = TableEvaluator.new
  actual    = yield(evaluator)

  if actual == expectation
    puts "#{label}: PASS"

stulentsev

Uploading files to TextMaster

TextMaster uses AWS S3 for storage, so s3-compatible libraries/toolkits can be used (for example, EvaporateJS). However, it is quite simple to do it with a basic HTTP client library, which is capable of doing GET/PUT requests.

The process consists of 4 steps:

1. Obtain a file you want to upload
2. Construct HTTP PUT request that will upload the file
3. Obtain a signature for the upload request
4. Send the signed request

stulentsev

When running this command for the first time

$ bundle exec rake db:create

you may get this error

Couldn't create database for {"adapter"=>"postgresql", "encoding"=>"unicode", "pool"=>5, "username"=>"tulenmenu", "password"=>"tulenmenu", "database"=>"tulenmenu_development"}

FATAL: role "tulenmenu" does not exist

stulentsev

% cat .git/hooks/pre-commit
#! /usr/bin/env ruby

puts "pre-commit hook: checking for forgotten debug statements"

debug_statements = [
  'binding.pry',
  'console.log',
  ':focus',
  'focus: true',