code_kata_4.rb

#!/usr/bin/env ruby

# Kata #4: Football Data

def smallest_spread(file)
  weather_data = File.open(file).readlines
  temp_spread = weather_data.map {|line| 
    next unless line.match(/\s([A-Za-z_]+).*?(\d+)\s\s-\s\s(\d+)/)
    
    day, max, min = $1, $2.to_i, $3.to_i
    [day, (max - min).abs]
  }

  puts temp_spread.compact.sort_by {|k, v| v }.first
end

smallest_spread("football.dat")




#!/usr/bin/env ruby

# Kata #4: Refactored Data

def spread(file, regex)
  data = File.open(file).readlines
  spread = data.map {|line| 
    next unless line.match(regex)
    
    day, max, min = $1, $2.to_i, $3.to_i
    [day, (max - min).abs]
  }

  spread.compact.sort_by {|k, v| v }
end

puts spread("football.dat", /\s([A-Za-z_]+).*?(\d+)\s\s-\s\s(\d+)/).first.join(", ")
puts spread("weather.dat", /^\s+(\d+)\s+(\d+)\s+(\d+)/).last.join(", ")




#!/usr/bin/env ruby

# Kata #4: Weather Data

def smallest_spread(file)
  weather_data = File.open(file).readlines
  temp_spread = weather_data.map {|line| 
    next unless line.match(/^\s+(\d+)\s+(\d+)\s+(\d+)/)
    
    day, max, min = $1.to_i, $2.to_i, $3.to_i
    [day, max-min]
  }

  puts temp_spread.compact.sort_by {|k, v| v }.last
end

smallest_spread("weather.dat")