generate.rb

geocode_to_zip = {} # line 15
CSV.foreach(geolite_csv) do |locId,country,region,city,postalCode,latitude,longitude,metroCode,areaCode|
  if country == 'US'
    puts "#{city}, #{postalCode}, #{metroCode}"
    geocode_to_zip[metroCode] = postalCode
  end
end

output

, ,
/Users/jdent/.rbenv/versions/1.9.3-p448/lib/ruby/1.9.1/csv.rb:1855:in `sub!': invalid byte sequence in UTF-8 (ArgumentError)
	from /Users/jdent/.rbenv/versions/1.9.3-p448/lib/ruby/1.9.1/csv.rb:1855:in `block in shift'
	from /Users/jdent/.rbenv/versions/1.9.3-p448/lib/ruby/1.9.1/csv.rb:1849:in `loop'
	from /Users/jdent/.rbenv/versions/1.9.3-p448/lib/ruby/1.9.1/csv.rb:1849:in `shift'
	from /Users/jdent/.rbenv/versions/1.9.3-p448/lib/ruby/1.9.1/csv.rb:1791:in `each'
	from /Users/jdent/.rbenv/versions/1.9.3-p448/lib/ruby/1.9.1/csv.rb:1208:in `block in foreach'
	from /Users/jdent/.rbenv/versions/1.9.3-p448/lib/ruby/1.9.1/csv.rb:1354:in `open'
	from /Users/jdent/.rbenv/versions/1.9.3-p448/lib/ruby/1.9.1/csv.rb:1207:in `foreach'
	from generate.rb:15:in `<main>'