30-seconds-of-code/snippets/hamming-distance.md

title, tags, cover, firstSeen, lastUpdated

title	tags	cover	firstSeen	lastUpdated
Hamming distance	math	tulips-and-reeds	2021-01-17T13:04:06+02:00	2021-02-18T14:22:25+02:00

Calculates the Hamming distance between two values.

• Use the XOR operator (^) to find the bit difference between the two numbers.
• Use bin() to convert the result to a binary string.
• Convert the string to a list and use count() of str class to count and return the number of 1s in it.

def hamming_distance(a, b):
  return bin(a ^ b).count('1')

hamming_distance(2, 3) # 1