balloons

balloons.rb

class Balloon
  EXPECTED = {
    'b' => 1,
    'a' => 1,
    'l' => 2,
    'o' => 2,
    'n' => 1
  }

  def initialize
    @current = Hash.new(0)
  end

  def add_letter(c)
    return true if !EXPECTED.keys.include?(c)
    return false if @current[c] == EXPECTED[c]
    @current[c] += 1
  end

  def complete?
    @current == EXPECTED
  end
end
def max_number_of_balloons(text)
  balloons = []
  text.each_char do |c|
    added = false
    balloons.each do |balloon|
      if balloon.add_letter(c)
        added = true
        break
      end
    end
    if added == false
      balloon = Balloon.new
      balloon.add_letter(c)
      balloons << balloon
    end
  end
  balloons.select{ |balloon| balloon.complete? }.count
end