Five weekends: Difference between revisions
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→{{header|Ruby}}
Line 5,790:
YEARS = (1900..2100).to_a
dates = YEARS.product(LONG_MONTHS).map{|y, m| Date.new(y,m,31)}.select(&:sunday?)
years_4w = YEARS - dates.map(&:year)▼
puts "There are #{dates.size} months with 5 weekends from 1900 to 2100:"
puts dates.first(5).map {|d| d.strftime("%b %Y") }, "..."
puts dates.last(5).map {|d| d.strftime("%b %Y") }
▲years_4w = YEARS - dates.map(&:year)
puts "There are #{years_4w.size} years without months with 5 weekends:"
puts years_4w.join(", ")</lang>
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