random_csv_generator.rb

#!/usr/bin/env ruby
require "rubygems"
require "faker"

require "csv"

line_count = ARGV.empty? ? 55 : ARGV.first.to_i

def maybe( value, percent_chance )
  return "" unless rand * 100 < percent_chance
  value
end

CSV( STDOUT ) do |csv|
  line_count.times do
    row = [
      Faker::Name.first_name,
      Faker::Name.last_name
    ]

    row << maybe( Faker::PhoneNumber.phone_number, 60 )
    row << maybe( Faker::Address.street_address,   40 )
    row << maybe( Faker::Address.city,             70 )
    row << maybe( Faker::Address.us_state,         70 )
    row << maybe( Faker::Address.zip_code,         65 )

    csv << row
  end
end

sample_output.csv