barrettclark

AllCops:
  DisabledByDefault: true
  TargetRubyVersion: 2.4

Bundler/DuplicatedGem:
  Enabled: true

Bundler/OrderedGems:
  Enabled: true

barrettclark

This donut chart is constructed from a CSV file storing the populations of various age groups. The chart employs a number of D3 features:

• d3.csv - load and parse data
• d3.scale.ordinal - color encoding
• d3.svg.arc - display arcs
• d3.layout.pie - compute arc angles from data

barrettclark

WITH raw_data AS (
  SELECT jurisdictions AS county, median_value AS value
  FROM maryland_residential_sales_figures
  WHERE median_value > 999
), ntiles AS (
  SELECT county,
    value,
    ROW_NUMBER() OVER (PARTITION BY county ORDER BY value) AS row_number,
    COUNT(*)     OVER (PARTITION BY county               ) AS total,
    NTILE(2)     OVER (PARTITION BY county ORDER BY value) AS bitile

barrettclark

namespace :db do
  namespace :heroku do
    desc "capture DB Backup"
    task :capture_backup => :environment do
      if Rails.env == 'development'
        Bundler.with_clean_env do
          config = Rails.configuration.database_configuration[Rails.env]
          system "heroku pg:backups capture"
        end
      end

barrettclark

class WordList
  attr_reader :words

  def initialize
    @words = Array.new
    read_list
  end

  def check_letters(*letters)
    letter_counts = letters.each_with_object(Hash.new(0)) { |letter, counts| counts[letter] += 1 }

barrettclark

namespace :boot2docker do
  desc 'Start VM from any states'
  task :start do
    %x(boot2docker start > /dev/null 2>&1)
  end

  desc 'Setup shell'
  task :shellinit => [:start] do
    # NOTE: this does not set the env, so we have to do something different
    # %x($(boot2docker shellinit > /dev/null 2>&1))

barrettclark

Barrett Clark

Contact details

• Twitter: @barrettclark
• Blog: http://www.barrettocracy.com/
• Company: Sabre Labs http://sabrelabs.com

Speaker bio

barrettclark

class PascalTriangle
  def initialize
    @digits = []
  end

  def calculate_row(row)
    row = row.to_f
    0.upto(row) { |column| @digits << calculate_number(row, column).to_i }
    @digits
  end

barrettclark

require 'rake'
# http://ruby-doc.org/stdlib/libdoc/net/http/rdoc/classes/Net/HTTP.html
require 'net/http'

desc "this is a test"
task :testing_rake do
  puts "Hello from rake!"
end

namespace :remote_file do

barrettclark

" bind command-/ to toggle comment
" requires NERD Commenter to be installed: http://www.vim.org/scripts/script.php?script_id=1218
nmap <D-/> ,c<space>
vmap <D-/> ,c<space>
imap <D-/> <C-O>,c<space>

" bind \d to toggle file browser
" requires NERDTree
nmap <leader>d :NERDTreeToggle<CR>