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Text processing/1: Difference between revisions
→{{header|Ruby}}: adding a very different implementation
m (→{{header|REXX}}: changed some comments.) |
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puts ""
puts "Maximum run(s) of #{max_invalid_count} consecutive false readings ends at #{invalid_run_end}"</lang>
Alternate implementation:
<lang ruby>Reading = Struct.new(:date, :value, :flag)
DailyReading = Struct.new(:date, :readings) do
def good() readings.select(&:flag) end
def bad() readings.reject(&:flag) end
def sum() good.map(&:value).inject(0.0) {|sum, val| sum + val } end
def avg() good.size > 0 ? (sum / good.size) : 0 end
def print_status
puts "%11s: good: %2d bad: %2d total: %8.3f avg: %6.3f" % [date, good.count, bad.count, sum, avg]
self
end
end
daily_readings = IO.foreach(ARGV.first).map do |line|
(date, *parts) = line.chomp.split(/\s/)
readings = parts.each_slice(2).map {|pair| Reading.new(date, pair.first.to_f, pair.last.to_i > 0)}
DailyReading.new(date, readings).print_status
end
all_readings = daily_readings.flat_map(&:readings)
good_readings = all_readings.select(&:flag)
all_streaks = all_readings.slice_when {|bef, aft| bef.flag != aft.flag }
bad_streak = all_streaks.reject {|grp| grp.any?(&:flag)}.sort_by(&:size).last
total = good_readings.map(&:value).reduce(:+)
num_readings = good_readings.count
puts
puts "Total: %.3f" % total
puts "Readings: #{num_readings}"
puts "Average %.3f" % total./(num_readings)
puts
puts "Max run of #{bad_streak.count} consecutive false readings from #{bad_streak.first.date} until #{bad_streak.last.date}"
</lang>
=={{header|Scala}}==
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