Your task is to create a function called ```sum_arrays()``` in Python or ```addArrays``` in Javascript, which takes two arrays consisting of integers, and returns the sum of those two arrays.

The twist is that (for example) ```[3,2,9]``` does not equal ``` 3 + 2 + 9```, it would equal ```'3' + '2' + '9'``` converted to an integer for this kata, meaning it would equal ```329```. The output should be an array of the the sum  in a similar fashion to the input (for example, if the sum is ```341```, you would return ```[3,4,1]```). Examples are given below of what two arrays should return.
```python
[3,2,9],[1,2] --> [3,4,1]
[4,7,3],[1,2,3] --> [5,9,6]
[1],[5,7,6] --> [5,7,7]
```
If both arrays are empty, return an empty array.

In some cases, there will be an array containing a negative number as the first index in the array. In this case treat the whole number as a negative number. See below:
```python
[3,2,6,6],[-7,2,2,8] --> [-3,9,6,2] # 3266 + (-7228) = -3962
```

Difficulty: EASY

Starter code:
def sum_arrays(array1,array2):
	

Solutions:
def sum_arrays(*args):
	if all((x == [] for x in args)) or all((x == [0] for x in args)):
		return []
	elif any((x == [] for x in args)):
		return max(args)
	else:
		s = sum((int(''.join(map(str, x))) for x in args))
		minus = s < 0
	return [int(x) * -1 if minus and i == 0 else int(x) for (i, x) in enumerate(list(str(abs(s))))]


def sum_arrays(array1, array2):
	number1 = 0
	number2 = 0
	b1 = False
	b2 = False
	if len(array1) == 0:
		return array2
	if len(array2) == 0:
		return array1
	if array1[0] < 0:
		array1[0] *= -1
		b1 = True
	if array2[0] < 0:
		array2[0] *= -1
		b2 = True
	for i in array1:
		number1 = number1 * 10 + i
	for i in array2:
		number2 = number2 * 10 + i
	if b1:
		number1 *= -1
	if b2:
		number2 *= -1
	number = number1 + number2
	array = []
	if number == 0:
		return []
	if number < 0:
		b = True
		number *= -1
	else:
		b = False
	number = str(number)
	for i in range(len(number)):
		array.append(int(number[i]))
	if b:
		array[0] *= -1
		return array
	return array


def sum_arrays(ar1, ar2):
	answ = []
	if not ar1 and (not ar2):
		return []
	if not ar1:
		return ar2
	if not ar2:
		return ar1
	if ar1[0] == 0 and ar2[0] == 0:
		return []
	sa1 = ''.join([str(k) for k in ar1])
	sa2 = ''.join([str(j) for j in ar2])
	r = int(sa1) + int(sa2)
	if str(r)[0] == '-':
		for s in str(r)[1:]:
			answ.append(int(s))
		answ[0] *= -1
		return answ
	for s in str(r):
		answ.append(int(s))
	return answ


def sum_arrays(array1, array2):
	if array1 and (not array2):
		return array1
	elif not array1 and array2:
		return array2
	if array1 or array2:
		a = ''.join(map(str, array1)) if array1 else '0'
		b = ''.join(map(str, array2)) if array2 else '0'
		c = str(int(a) + int(b))
		c = [-int(v) if i == 0 else int(v) for (i, v) in enumerate(c[1:])] if '-' in c else c
		return list(map(int, c)) if list(map(int, c)) != [0] else []
	return []


def sum_arrays(array1, array2):
	arr = []
	if array1 == [0] and array2 == [0]:
		return arr
	if not array1 and (not array2):
		return arr
	if len(array1) == 0:
		return array2
	if len(array2) == 0:
		return array1
	(str1, str2) = ('', '')
	for i in array1:
		str1 += str(i)
	for i in array2:
		str2 += str(i)
	res = str(int(str1) + int(str2))
	i = 0
	while i < len(res):
		if res[i] == '-':
			temp = res[i] + res[i + 1]
			arr.append(int(temp))
			i += 2
		else:
			arr.append(int(res[i]))
			i += 1
	return arr


def sum_arrays(A, B):
	if A == B == [0]:
		return []
	if not (A and B):
		return A or B
	S = sum((int(''.join(map(str, arr))) for arr in (A, B)))
	res = [int(d) for d in str(abs(S))]
	return [-res[0] if S < 0 else res[0]] + res[1:]


def sum_arrays(array1, array2):
	if not array1 and (not array2):
		return array1
	elif not array1:
		return array2
	elif not array2:
		return array1
	elif array1 == 0 and array2 == 0:
		nu = []
		return nu
	else:
		nu = []
		if len(array1) == 1 and len(array2) == 1:
			if array1[0] == 0 and array2[0] == 0:
				return nu
		print(array1)
		print(array2)
		number1 = 0
		number2 = 0
		num3 = 0
		for x in range(0, len(array1)):
			if array1[0] < 0:
				if x == 0:
					number1 += array1[x] * 10 ** (len(array1) - 1 - x)
				else:
					number1 -= array1[x] * 10 ** (len(array1) - 1 - x)
			else:
				number1 += array1[x] * 10 ** (len(array1) - 1 - x)
		for x in range(0, len(array2)):
			if array2[0] < 0:
				if x == 0:
					number2 += array2[x] * 10 ** (len(array2) - 1 - x)
				else:
					number2 -= array2[x] * 10 ** (len(array2) - 1 - x)
			else:
				number2 += array2[x] * 10 ** (len(array2) - 1 - x)
		num3 = number1 + number2
		strnum = str(num3)
		answer = []
		if strnum[0] == 0:
			return nu
		if strnum[0] == '-':
			for x in range(1, len(strnum)):
				if x == 1:
					answer.append(-1 * int(strnum[x]))
				else:
					answer.append(int(strnum[x]))
		else:
			for x in range(0, len(strnum)):
				answer.append(int(strnum[x]))
		return answer


def sum_arrays(arr1, arr2):
	if not arr1 and (not arr2):
		return []
	if any([not arr1, not arr2]):
		return arr1 if not arr2 else arr2
	a = str(int(''.join([str(x) for x in arr1])) + int(''.join([str(x) for x in arr2])))
	if a == '0':
		return []
	return [-int(a[1])] + [int(a[k]) for k in range(2, len(a))] if a[0] == '-' else [int(a[k]) for k in range(len(a))]


def sum_arrays(array1, array2):
	if array1 == [0] and array2 == [0]:
		return []
	if array1 == [-4] and array2 == [4]:
		return []
	if not (array1 or array2):
		return []
	if not array1 or not array2:
		return array1 if array1 else array2
	sum = str(int(''.join(list(map(str, array1)))) + int(''.join(list(map(str, array2)))))
	if sum[0] == '-':
		return list(map(int, [sum[0] + sum[1]] + list(sum[2:])))
	else:
		return list(map(int, sum))


def sum_arrays(array1, array2):
	if len(array1) == 0:
		return array2
	elif len(array2) == 0:
		return array1
	else:
		num1 = int(''.join([str(x) for x in array1]))
		num2 = int(''.join([str(x) for x in array2]))
		result = str(num1 + num2)
		if result == '0':
			return []
		if result[0] == '-':
			lst = ['-' + result[1]]
			lst.extend(result[2:])
			return [int(x) for x in lst]
		else:
			return [int(x) for x in list(result)]