module PairWithGivenSum

# File lib/pair_with_given_sum.rb, line 25
    def PairWithGivenSum.parseArray(arr)
return arr.scan(/\d+/).map(&:to_i)
    end

# File lib/pair_with_given_sum.rb, line 2
  def PairWithGivenSum.run(str, sum)
          if str.nil?  || str.length <=2 || sum.nil?
                  puts "Must be given a string representing an integer array and an integer sum."
          else
array = PairWithGivenSum.parseArray(str)
array.sort!
smallIndex = 0
largeIndex = array.length - 1
while largeIndex > smallIndex
  tmpSum = array[largeIndex] + array[smallIndex]
  if tmpSum == sum
    puts "Sum of #{array[smallIndex]} & #{array[largeIndex]} = #{sum}"
    return
  elsif tmpSum > sum
    largeIndex -= 1
  else
    smallIndex += 1
  end
end
puts "No pair with sum of #{sum}"
          end
  end