Add solution #500

Author: JoshCrozier

README.md

@@ -89,6 +89,7 @@
 448|[Find All Numbers Disappeared in an Array](./0448-find-all-numbers-disappeared-in-an-array.js)|Easy|
 451|[Sort Characters By Frequency](./0451-sort-characters-by-frequency.js)|Medium|
 459|[Repeated Substring Pattern](./0459-repeated-substring-pattern.js)|Easy|
+500|[Keyboard Row](./0500-keyboard-row.js)|Easy|
 541|[Reverse String II](./0541-reverse-string-ii.js)|Easy|
 551|[Student Attendance Record I](./0551-student-attendance-record-i.js)|Easy|
 565|[Array Nesting](./0565-array-nesting.js)|Medium|

solutions/0500-keyboard-row.js

@@ -0,0 +1,22 @@
+/**
+ * 500. Keyboard Row
+ * https://leetcode.com/problems/keyboard-row/
+ * Difficulty: Easy
+ *
+ * Given an array of strings words, return the words that can be typed using letters
+ * of the alphabet on only one row of American keyboard like the image below.
+ *
+ * In the American keyboard:
+ * - the first row consists of the characters "qwertyuiop",
+ * - the second row consists of the characters "asdfghjkl", and
+ * - the third row consists of the characters "zxcvbnm".
+ */
+
+/**
+ * @param {string[]} words
+ * @return {string[]}
+ */
+var findWords = function(words) {
+  const rows = ['qwertyuiop', 'asdfghjkl', 'zxcvbnm'];
+  return words.filter(word => rows.some(row => word.toLowerCase().split('').every(s => row.includes(s))));
+};