This will print three elements in an array whose sum is equal to an existing array

sol.rb

arr = [1, 2, 4, 10, 90, 302, 312, 500]
(2..arr.count).each do |len|
 arr.combination(len).each do |comb|
  sum = comb.inject(:+)
   if arr.include? sum
    puts (comb << sum).inspect
  end
 end
end

@ankuriitk Please find the solution, I'm not that richer by Ruby. Learned little more.... (.inspect and .to_s)