Bablzz

def solve(n, a, b, c):
    if n > 0:
        solve(n - 1, a, c, b)
        print('Move disk from ' + a + ' to disk ' + b)
        solve(n - 1, c, b, a)


solve(3, '1', '2', '3')

Bablzz

memo = Hash.new(0)

def fib_rec (number, memo)
	if number == 0
		return number
	elsif (number == 1) || (number == 2)
		return 1
	end
  if (memo.has_key?(number))
    return memo[number]

Bablzz

# O(n^2)
def insertion_sort arr
i = 0
j = 0
  for i in 1...(arr.length) do
    key = arr[i]
    
    j = i - 1
    while j >= 0 and key < arr[j] do
       arr[j + 1] = arr[j] 

Bablzz

1. Packer change entrypoint. This is obscure if you are just trying packer. You can read this here

2. Packer doesn't work with scratch/distroless images(and another without bash) If your docker image has no bash packer does not build your image. See here

3. Packer has no some docker command like copy. See here