This notebook was prepared by Donne Martin. Source and license info is on GitHub.

# Challenge Notebook¶

## Constraints¶

• Can we use division?
• No
• Is the output a list of ints?
• Yes
• Can we assume the inputs are valid?
• No
• Can we assume this fits memory?
• Yes

## Test Cases¶

* None -> TypeError
* [] -> []
* [0] -> []
* [0, 1] -> [1, 0]
* [0, 1, 2] -> [2, 0, 0]
* [1, 2, 3, 4] -> [24, 12, 8, 6]

## Algorithm¶

Refer to the Solution Notebook. If you are stuck and need a hint, the solution notebook's algorithm discussion might be a good place to start.

## Code¶

In [ ]:
class Solution(object):

def mult_other_numbers(self, array):
# TODO: Implement me
pass

## Unit Test¶

The following unit test is expected to fail until you solve the challenge.

In [ ]:
import unittest

class TestMultOtherNumbers(unittest.TestCase):

def test_mult_other_numbers(self):
solution = Solution()
self.assertRaises(TypeError, solution.mult_other_numbers, None)
self.assertEqual(solution.mult_other_numbers([0]), [])
self.assertEqual(solution.mult_other_numbers([0, 1]), [1, 0])
self.assertEqual(solution.mult_other_numbers([0, 1, 2]), [2, 0, 0])
self.assertEqual(solution.mult_other_numbers([1, 2, 3, 4]), [24, 12, 8, 6])
print('Success: test_mult_other_numbers')

def main():
test = TestMultOtherNumbers()
test.test_mult_other_numbers()

if __name__ == '__main__':
main()

## Solution Notebook¶

Review the Solution Notebook for a discussion on algorithms and code solutions.