Reverse Vowels of a String

Author: parshva45

Diff for: Reverse Vowels of a String.js

@@ -0,0 +1,50 @@
+/*Write a function that takes a string as input and reverse only the vowels of a string.
+
+Example 1:
+Given s = "hello", return "holle".
+
+Example 2:
+Given s = "leetcode", return "leotcede".
+
+Note:
+The vowels does not include the letter "y".*/
+
+/**
+ * @param {string} s
+ * @return {string}
+ */
+var reverseVowels = function(s) {
+    if(s == '' )
+        return s
+    letters = s.split('')
+    i = 0
+    j = letters.length-1
+    while(letters[i] && !isVowel(letters[i]))
+        i++
+    while(letters[i] && !isVowel(letters[j]))
+        j--
+    while(i<j){
+        letters = swap(letters,i,j)
+        i++
+        j--
+        while(letters[i] && !isVowel(letters[i]))
+            i++
+        while(letters[i] && !isVowel(letters[j]))
+            j--
+    }
+    return letters.join('')
+};
+
+var isVowel = function(letter){
+    if(letter.match(/[a-zA-Z]/i) == null)
+        return false
+    vowels = ['a','A','e','E','i','I','o','O','u','U']
+    return vowels.indexOf(letter) != -1
+}
+
+var swap = function(arr,i,j){
+    temp = arr[i]
+    arr[i] = arr[j]
+    arr[j] = temp
+    return arr
+}