Fizz Buzz

sac_fizz_buzz.rb

class FizzBuzz
  
  def initialize(endpoint)
    @endpoint = endpoint
  end

  def play
    return '' unless @endpoint.is_a? Integer
    return '' if @endpoint <= 0
    result = []
    for number in 1..@endpoint
      result << at(number)
    end
    return result.join(',')
  end

  def at(target)
    return "" if target > @endpoint

    if (target%3==0 and target%5 ==0)
      then 'fizzbuzz'
    elsif target %3==0 then 'fizz'
    elsif target %5==0 then 'buzz'
    else target
    end 

  end

end