CarlosCD

# Question from Quora.com:
#  How do I write a program that computes "b" raised to power "n" using only addition and iteration?
#  http://www.quora.com/Computer-Programming/How-do-I-write-a-program-that-computes-b-raised-to-power-n-using-only-addition-and-iteration

# My solution in Ruby:

def power(b, n)
  result = 1
  n.times do
    result = Array.new(b, result).reduce(:+).to_i

CarlosCD

# Use SSL!
# And place in production.rb:

HOST_NAME  = 'localhost:3000'
IP_ADDRESS =  '10.17.1.125'
USER_NAME  = 'johnny'
PASSSWORD  = 'BeGood'

if Rails.env.production?
  class SillyAuth < Rack::Auth::Basic

CarlosCD

# General case, English notation:
def pretty_number(num)
  num.to_s.tap do |s|
    :anything while s.gsub!(/^([^.]*)(\d)(?=(\d{3})+)/, "\\1\\2,")
  end
end

# Puts the commas in the thousands, allows to use a character other than ',':
def pretty_number(number, comma = ',')
 number.to_s.tap do |s|

CarlosCD

#!/usr/bin/env ruby

# See: http://postgresapp.com/documentation/install.html

dumping_folder = 'dump'
expected_header = "                                            List of databases\n" +
                  "                Name                 | Owner  | Encoding |   Collate   |    Ctype    | Access privileges \n" +
                  "-------------------------------------+--------+----------+-------------+-------------+-------------------\n"

databases = `psql --list`

CarlosCD

Gem::Specification.new do |s|
  s.name        = 'draper-mongoid'
  s.version     = '0.1.0'
  s.platform    = Gem::Platform::RUBY
  s.author      = 'John Bintz'
  s.email       = 'john@coswellproductions.com'
  s.summary     = 'Quick little hack to make Mongoid work with Draper wrt model_name'
  s.description = 'Quick little hack to make Mongoid work with Draper wrt model_name'

  s.files         = ['draper-mongoid.rb']

CarlosCD

Gem::Specification.new do |s|
  s.name        = 'mongoid-accepts_embedded_resource_for'
  s.version     = '0.1.0'
  s.platform    = Gem::Platform::RUBY
  s.author      = 'John Bintz'
  s.email       = 'john@coswellproductions.com'
  s.summary     = 'Add accepts_embedded_resources_for to Mongoid::NestedAttributes, so it plays nicer with Carrierwave and embedded documents'
  s.description = 'Add accepts_embedded_resources_for to Mongoid::NestedAttributes, so it plays nicer with Carrierwave and embedded documents'

  s.files         = ['mongoid-accepts_embedded_resource_for.rb']

CarlosCD

# Array#flatten in Ruby (exercise).
# Added as an Array instance method, with the name 'flattening'

class Array

  def flattening
    flat_me(self)
  end

  private

CarlosCD

# All by order of frequency:
git log --pretty=format:'%s' | cut -d " " -f 1 | sort | uniq -c | sort -nr

# Angry developers:
git log --pretty=format:'%s' | tr '[:upper:]' '[:lower:]' | tr '[:space:]' '\n' | sort | uniq -c | sort -nr | grep -iE "(fuck|shit|bitch|damn|piss)"

CarlosCD

require 'nokogiri'
require 'open-uri'

# Get a Nokogiri::HTML:Document for the page we're interested in...

doc = Nokogiri::HTML(open('http://www.google.com/search?q=tenderlove'))

# Do funky things with it using Nokogiri::XML::Node methods...

####

CarlosCD

Originally taken from: Braintree Article and expanded on by me.

Safe

• Add a new column
• Drop a column
• Rename a column
• Add an index concurrently (Example), Note: it will still take a long time to run the migration, but it won't write-lock the table.
• Drop a constraint (for example, non-nullable)
• Add a default value to an existing column