class Time
def step(other_time, increment)
raise ArgumentError, "step can't be 0" if increment == 0
increasing = self < other_time
if (increasing && increment < 0) || (!increasing && increment > 0)
yield self
return
end
d = self
begin
yield d
d += increment
end while (increasing ? d <= other_time : d >= other_time)
end
def upto(other_time)
step(other_time, 1) { |x| yield x }
end
end
the_first = Time.local(2004, 1, 1)
the_second = Time.local(2004, 1, 2)
the_first.step(the_second, 60 * 60 * 6) { |x| puts x }
the_first.upto(the_first) { |x| puts x }
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