[Solved] How to split a Number to Natural Numerals in Ruby [closed]

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Here’s one way:

def natural_numerals(value)
  results = []
  (1..value-1).each {|i| (i..value-1).each {|j| results << (i..j).to_a.join("+") if (i+j)*(j-i+1)/2 == value}}
  if results.empty? then nil else results end
end

output1 = natural_numerals(15)
output2 = natural_numerals(4)

puts output1.inspect #=> ["1+2+3+4+5", "4+5+6", "7+8"]
puts output2.inspect #=> nil

solved How to split a Number to Natural Numerals in Ruby [closed]