23 lines
586 B
Markdown
23 lines
586 B
Markdown
---
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title: Hamming distance
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tags: math,algorithm
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cover: colorful-lounge
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firstSeen: 2017-12-17T17:55:51+02:00
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lastUpdated: 2020-12-28T13:49:24+02:00
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---
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Calculates the Hamming distance between two values.
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- Use the XOR operator (`^`) to find the bit difference between the two numbers.
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- Convert to a binary string using `Number.prototype.toString()`.
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- Count and return the number of `1`s in the string, using `String.prototype.match()`.
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```js
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const hammingDistance = (num1, num2) =>
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((num1 ^ num2).toString(2).match(/1/g) || '').length;
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```
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```js
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hammingDistance(2, 3); // 1
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```
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