Merge pull request #712 from Bruce-Feldman/Simplify-nth_Element

[ENHANCEMENT] Simplified nth Element, added better support for negative numbers thanks to @Bruce-Feldman

snippets/nthElement.md

@@ -3,11 +3,11 @@
 Returns the nth element of an array.
 
 Use `Array.slice()` to get an array containing the nth element at the first place.
-If the index is out of bounds, return `[]`.
+If the index is out of bounds, return `undefined`.
 Omit the second argument, `n`, to get the first element of the array.
 
 ```js
-const nthElement = (arr, n = 0) => (n > 0 ? arr.slice(n, n + 1) : arr.slice(n))[0];
+const nthElement = (arr, n = 0) => (n === -1 ? arr.slice(n) : arr.slice(n, n + 1))[0];
 ```
 
 ```js