lib/koyomi/month.rb
def nth_wday!(nth, wday_name)
    date = nth_wday(nth, wday_name)
    raise Koyomi::WrongRangeError if date.month != self.month
    date
  end
# week day of nth week.
#
# @param  [Integer] nth
# @param  [Object]  wday_name
# @return [Date]
week day of nth week.
week day of nth week .
def nth_wday!(nth, wday_name)
    date = nth_wday(nth, wday_name)
    raise Koyomi::WrongRangeError if date.month != self.month
    date
  end
def nth_wday! ( nth , wday_name ) date = nth_wday ( nth , wday_name ) raise Koyomi :: WrongRangeError if date . month != self . month date end
week day of nth week.
week day of nth week .
None
Date
nth
wday_name
None