XOR Checksum

Problem

Compute the XOR checksum of a string by XOR-ing the numeric character codes of all its characters.

The empty string has checksum 0, and repeated characters cancel in pairs. This is a simple error-detection checksum, not a cryptographic hash.

Hint

Every character that appears an even number of times cancels out of the XOR.

case 1

in: [""]

expected: 0

case 2

in: ["a"]

expected: 97

case 3

in: ["ab"]

expected: 3

case 4

in: ["hello"]

expected: 98

case 5

in: ["AAAA"]

expected: 0

Starter codePython

def xor_checksum(data):
    # Your code here
    pass

5 test cases · run your code against them in the editor