Remaining days : Date Calculation « Date « Ruby

1. Ruby
2. Date
3. Date Calculation

Remaining days

require 'date'
def remaining(date, event)
  intervals = [["day", 1], ["hour", 24], ["minute", 60], ["second", 60]]
  elapsed = DateTime.now - date
  tense = elapsed > 0 ? "since" : "until"
  interval = 1.0
  parts = intervals.collect do |name, new_interval|
    interval /= new_interval
    number, elapsed = elapsed.abs.divmod(interval)
  "#{number.to_i} #{name}#{"s" unless number == 1}"
  end
  puts "#{parts.join(", ")} #{tense} #{event}."
end

remaining(DateTime.new(2006, 4, 15, 0, 0, 0, DateTime.now.offset),"the book deadline")

 

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