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javascript/snippets/bucket-sort.md

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+---
+title: Bucket sort
+type: snippet
+tags: [algorithm,array]
+cover: canoe
+dateModified: 2020-12-29T12:22:44+02:00
+---
+
+Sorts an array of numbers, using the bucket sort algorithm.
+
+- Use `Math.min()`, `Math.max()` and the spread operator (`...`) to find the minimum and maximum values of the given array.
+- Use `Array.from()` and `Math.floor()` to create the appropriate number of `buckets` (empty arrays).
+- Use `Array.prototype.forEach()` to populate each bucket with the appropriate elements from the array.
+- Use `Array.prototype.reduce()`, the spread operator (`...`) and `Array.prototype.sort()` to sort each bucket and append it to the result.
+
+```js
+const bucketSort = (arr, size = 5) => {
+  const min = Math.min(...arr);
+  const max = Math.max(...arr);
+  const buckets = Array.from(
+    { length: Math.floor((max - min) / size) + 1 },
+    () => []
+  );
+  arr.forEach(val => {
+    buckets[Math.floor((val - min) / size)].push(val);
+  });
+  return buckets.reduce((acc, b) => [...acc, ...b.sort((a, b) => a - b)], []);
+};
+```
+
+```js
+bucketSort([6, 3, 4, 1]); // [1, 3, 4, 6]
+```