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SyunWatanabe/partition.rb

Created August 29, 2020 04:43
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partition.rb
# Ruby Document
# https://docs.ruby-lang.org/ja/latest/class/Enumerable.html#I_PARTITION
# github: holiday_japan
# https://github.com/masa16/holiday_japan/blob/master/lib/holiday_japan.rb
require 'holiday_japan'
# Enumerable#partitionを使い2020年の祝日がある月を抽出する
year = 2020
months = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
happy_months, unhappy_months = months.partition do |month|
beginning_day = Date.new(year, month, 1)
end_day = Date.new(year, month, -1)
HolidayJapan.between(beginning_day, end_day).any?
end
puts "We have national holidays on these months in 2020 : #{happy_months})"
puts "We have no national holidays on these months in 2020 : #{unhappy_months})"
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