CSV::Reader extension: Utilize header row

csv_reader_with_header.rb

# Extends CSV::Reader to assume the first row is the headers to the data
# (i.e. fields names). Each non-header row in the data with then be
# passed a hash instead of the normal array so you can reference the
# data by field name. For example:
#
#      CSV::Reader::WithHeader.parse(io) do |row|
#        puts row['first_name'] + ' ' + row['last_name']
#      end
class CSV::Reader::WithHeader < CSV::Reader
  def self.parse(str_or_readable, fs=',', &blk)
    headers = nil
    super str_or_readable, fs do |row|
      if headers
        blk.call Hash[*headers.zip(row).flatten]
      else
        headers = row
      end
    end
  end
end