Move all zeros to the end

move_zeros.rb

def move_zeros(nums)
  return nums if nums.empty?
  left = 0
  right = nums.length - 1
  while left < right do
    if nums[left] == 0
       nums[left], nums[right] = nums[right], nums[left]
       right -= 1
    else
       left += 1
    end
  end
  nums
end

nums = [0, 1, 0, 0, 0, 0, 1, 2, 3, 4, 0, 1, 5, 7 ]

result = move_zeros(nums)
puts result.inspect