Add: Reverse Vowels of a String

problems/reverse-vowels-of-a-string/reverse_vowels_of_a_string.go

@@ -1 +1,25 @@
 package reverse_vowels_of_a_string
+
+func reverseVowels(s string) string {
+i, j, ss := 0, len(s)-1, []byte(s)
+for i < j {
+if !isVowel(ss[i]) {
+i++
+} else if !isVowel(ss[j]) {
+j--
+} else {
+ss[i], ss[j] = ss[j], ss[i]
+i++
+j--
+}
+}
+return string(ss)
+}
+
+func isVowel(r byte) bool {
+switch r {
+case 'a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U':
+return true
+}
+return false
+}

problems/reverse-vowels-of-a-string/reverse_vowels_of_a_string_test.go

@@ -1 +1,27 @@
 package reverse_vowels_of_a_string
+
+import "testing"
+
+type caseType struct {
+input string
+expected string
+}
+
+func TestReverseVowels(t *testing.T) {
+tests := [...]caseType{
+{
+input: "hello",
+expected: "holle",
+},
+{
+input: "leetcode",
+expected: "leotcede",
+},
+}
+for _, tc := range tests {
+output := reverseVowels(tc.input)
+if output != tc.expected {
+t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)
+}
+}
+}