Add 4 array snippets

snippets/findConsecutive.md

@@ -0,0 +1,22 @@
+---
+title: Arrays of consecutive elements
+tags: array
+expertise: intermediate
+author: chalarangelo
+firstSeen: 2022-04-06T05:00:00-04:00
+---
+
+Finds all arrays of consecutive elements.
+
+- Use `Array.prototype.slice()` to create an array with `n - 1` elements removed from the start.
+- Use `Array.prototype.map()` and `Array.prototype.slice()` to map each element to an array of `n` consecutive elements.
+
+```js
+const findConsecutive = (arr, n) =>
+  arr.slice(n - 1).map((v, i) => arr.slice(i, i + n));
+```
+
+```js
+findConsecutive([1, 2, 3, 4, 5], 2);
+// [[1, 2], [2, 3], [3, 4], [4, 5]]
+```