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kata 4: data munging (part 1)
data =
File.foreach("weather.dat") { |line|
if line =~ /^\s+([0-9]+)\s+([0-9]+)[*]?\s+([0-9]+)[*]?/ then
data << {:day => Integer($1), :spread => Integer($2) - Integer($3)}
puts data.min { |a,b| a[:spread] <=> b[:spread] }
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