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30-seconds-of-code/snippets/hamming-distance.md
2017-12-13 14:23:56 +02:00

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### Hamming distance between two numbers
Use XOR operator (`^`) to find the bit difference between the two numbers, convert to binary string using `toString(2)`.
Count and return the number of `1`s in the string, using `match(/1/g)`.
```js
const hammingDistance = (num1, num2) =>
((num1^num2).toString(2).match(/1/g) || '').length;
//hammingDistance(2,3) -> 1
```