Detecting overlapping ranges in Ruby

Question

I have array of ranges :

[[39600..82800], [39600..70200],[70200..80480]]

I need to determine if there is overlapping or not.What is an easy

Answer 1

Is this not a way to do it?

def any_overlapping_ranges(array_of_ranges)
   array_of_ranges.sort_by(&:first).each_cons(2).any?{|x,y|x.last>y.first}
end

p any_overlapping_ranges([50..100, 1..51,200..220]) #=> True