Create nth-element-of-array.md

snippets/nth-element-of-array.md

@@ -0,0 +1,11 @@
+### Nth element of array
+
+Use `Array.slice()` to get an array containing the nth element at the first place. 
+If the index is out of bounds, return `[]`.
+Omit the second argument, `n`, to get the first element of the array.
+
+```js
+const nth = (arr, n=0) => (n>0? arr.slice(n,n+1) : arr.slice(n))[0];
+// nth(['a','b','c'],1) -> 'b'
+// nth(['a','b','b']-2) -> 'a'
+```