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phildarnowsky/gist:189293

Forked from mattetti/gist:189283
Created September 18, 2009 21:10
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gistfile1.rb
def summer_monthly_usage
return @summer_monthly_usage if @summer_monthly_usage
monthly_usages = rates.summer_months_nbr.map{|month| monthly_usage[month - 1]}
@summer_monthly_usage = monthly_usages.inject(0){|sum, v| sum += v}
end
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