gistfile1.rb

header = nil

FasterCSV.foreach(FILE) do |row|
  row.map! { |v| v.strip!; v == 'NULL' || v.blank? ? nil : v }

  unless header
    header = row.freeze
    next
  end

  # create a Hash where the key is the column name, and the value is the field value
  data = header.zip(row).to_hash

  # ...
end