combinator.rb

def create_array(number)
  array = []
  number.times do |num|
    array << "e#{num}".to_s
  end
  return array
end

def find_combinations(array)
  combos = []
  array.length.times do |number|
    next if number == 0
    combos << array.combination(number)
  end
  return combos
end