euler/ruby/euler012.rb

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require_relative 'euler'
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def triangle_enumerator
Enumerator.new do |y|
sum = 1
next_num = 2
loop do
y << sum
sum += next_num
next_num += 1
end
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end
end
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def solution
triangle_enumerator.take_while { |x| x.divisors.count <= 500 }.last
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end