Add solution #557

Author: JoshCrozier

README.md

@@ -114,6 +114,7 @@
 506|[Relative Ranks](./0506-relative-ranks.js)|Easy|
 541|[Reverse String II](./0541-reverse-string-ii.js)|Easy|
 551|[Student Attendance Record I](./0551-student-attendance-record-i.js)|Easy|
+557|[Reverse Words in a String III](./0557-reverse-words-in-a-string-iii.js)|Easy|
 565|[Array Nesting](./0565-array-nesting.js)|Medium|
 566|[Reshape the Matrix](./0566-reshape-the-matrix.js)|Easy|
 606|[Construct String from Binary Tree](./0606-construct-string-from-binary-tree.js)|Easy|

solutions/0557-reverse-words-in-a-string-iii.js

@@ -0,0 +1,16 @@
+/**
+ * 557. Reverse Words in a String III
+ * https://leetcode.com/problems/reverse-words-in-a-string-iii/
+ * Difficulty: Easy
+ *
+ * Given a string s, reverse the order of characters in each word within a sentence while
+ * still preserving whitespace and initial word order.
+ */
+
+/**
+ * @param {string} str
+ * @return {string}
+ */
+var reverseWords = function(str) {
+  return str.split(/\s/).map(s => s.split('').reverse().join('')).join(' ');
+};