Add solution #709

Author: JoshCrozier

README.md

@@ -1,4 +1,4 @@
-# 1,398 LeetCode solutions in JavaScript
+# 1,399 LeetCode solutions in JavaScript
 
 [https://leetcodejavascript.com](https://leetcodejavascript.com)
 
@@ -542,6 +542,7 @@
 705|[Design HashSet](./solutions/0705-design-hashset.js)|Easy|
 706|[Design HashMap](./solutions/0706-design-hashmap.js)|Easy|
 707|[Design Linked List](./solutions/0707-design-linked-list.js)|Medium|
+709|[To Lower Case](./solutions/0709-to-lower-case.js)|Easy|
 710|[Random Pick with Blacklist](./solutions/0710-random-pick-with-blacklist.js)|Hard|
 712|[Minimum ASCII Delete Sum for Two Strings](./solutions/0712-minimum-ascii-delete-sum-for-two-strings.js)|Medium|
 713|[Subarray Product Less Than K](./solutions/0713-subarray-product-less-than-k.js)|Medium|

solutions/0709-to-lower-case.js

@@ -0,0 +1,16 @@
+/**
+ * 709. To Lower Case
+ * https://leetcode.com/problems/to-lower-case/
+ * Difficulty: Easy
+ *
+ * Given a string s, return the string after replacing every uppercase letter with the same
+ * lowercase letter.
+ */
+
+/**
+ * @param {string} s
+ * @return {string}
+ */
+var toLowerCase = function(s) {
+  return s.toLowerCase();
+};