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javascript/snippets/hamming-distance.md

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