merge: added reduceRight & trim method (#961)

String/ReverseWords.js

@@ -1,16 +1,17 @@
+/**
+ * @function reverseWords
+ * @param {string} str
+ * @returns {string} - reverse string
+ */
 const reverseWords = (str) => {
   if (typeof str !== 'string') {
     throw new TypeError('The given value is not a string')
   }
-  // Split string into words
-  // Ex. "I Love JS" => ["I", "Love", "JS"]
-  const words = str.split(' ')
-  // reverse words
-  // ["I", "Love", "JS"] => ["JS", "Love", "I"]
-  const reversedWords = words.reverse()
-  // join reversed words with space and return
-  // ["JS", "Love", "I"] => "JS Love I"
-  return reversedWords.join(' ')
+
+  return str
+    .split(/\s+/) // create an array with each word in string
+    .reduceRight((reverseStr, word) => `${reverseStr} ${word}`, '') // traverse the array from last & create an string
+    .trim() // remove the first useless space
 }
 
-export { reverseWords }
+export default reverseWords