kata 4: data munging (part 3)

kata4_3.rb

class TabFile < File
  def initialize(file, regexp)
    super(file, "r")
    @regexp = regexp
  end

  def tab_data
    data = Array.new
    self.each { |line|
      line_match = @regexp.match(line)
      if !line_match.nil? then
        data << line_match.captures.collect { |v| v.match(/^\d+$/)? v.to_i : v }
      end
    }
    return data
  end
end

puts TabFile.new("weather.dat", /^\s+([0-9]+)\s+([0-9]+)[*]?\s+([0-9]+)[*]?/).tab_data.min {|a,b| a[1]-a[2] <=> b[1]-b[2] }[0]

puts TabFile.new("football.dat", /^\s+[0-9]+[.]\s([a-zA-Z_]+)\s+[0-9]+\s+[0-9]+\s+[0-9]+\s+[0-9]+\s+([0-9]+)\s+-\s+([0-9]+)/).tab_data.min { |a,b| (a[1]-a[2]).abs <=> (b[1]-b[2]).abs }[0]