Prepare repository for merge

javascript/snippets/count-occurrences.md

@@ -0,0 +1,20 @@
+---
+title: Count occurrences
+type: snippet
+tags: [array]
+cover: dark-leaves-4
+dateModified: 2020-10-18T23:04:45+03:00
+---
+
+Counts the occurrences of a value in an array.
+
+- Use `Array.prototype.reduce()` to increment a counter each time the specific value is encountered inside the array.
+
+```js
+const countOccurrences = (arr, val) =>
+  arr.reduce((a, v) => (v === val ? a + 1 : a), 0);
+```
+
+```js
+countOccurrences([1, 1, 2, 1, 2, 3], 1); // 3
+```