Rename js snippets

snippets/js/s/consecutive-element-subarrays.md

@@ -0,0 +1,28 @@
+---
+title: Consecutive element subarrays
+type: snippet
+language: javascript
+tags: [array]
+author: chalarangelo
+cover: camera-zoom
+dateModified: 2020-10-18T20:24:28+03:00
+---
+
+Creates an array of `n`-tuples of consecutive elements.
+
+- Use `Array.prototype.slice()` and `Array.prototype.map()` to create an array of appropriate length.
+- Populate the array with `n`-tuples of consecutive elements from `arr`.
+- If `n` is greater than the length of `arr`, return an empty array.
+
+```js
+const aperture = (n, arr) =>
+  n > arr.length
+    ? []
+    : arr.slice(n - 1).map((v, i) => arr.slice(i, i + n));
+```
+
+```js
+aperture(2, [1, 2, 3, 4]); // [[1, 2], [2, 3], [3, 4]]
+aperture(3, [1, 2, 3, 4]); // [[1, 2, 3], [2, 3, 4]]
+aperture(5, [1, 2, 3, 4]); // []
+```