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todashuta/num_sundays.rb

Last active August 29, 2015 14:15
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ある期間中の日曜日の数を数える written in Ruby
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num_sundays.rb
# See: https://plus.google.com/103883213408660487064/posts/EmxndYMnSxm
require 'date'
puts (Date.new(1990,1,1)..Date.new(2015,2,11)).count(&:sunday?)
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