Add The hashtag generator

theHashtagGenerator.js

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+// https://www.codewars.com/kata/the-hashtag-generator/
+// The marketing team is spending way too much time typing in hashtags.
+// Let's help them with out own Hashtag Generator!
+
+// Here's the deal:
+
+// - It must start with a hashtag (#).
+// - All words must have their first letter capitalized.
+// - If the final result is longer than 140 chars it must return false.
+// - If the input or the result is an empty string it must return false.
+function generateHashtag (str) {
+  const output = str.trim().length > 0 &&
+    '#'+str.split(' ').map(word => word && word[0].toUpperCase() + word.slice(1)).join('');
+  return output.length <= 140 && output;
+}