Create 0387-first-unique-character-in-a-string.kt

Author: a93a

Diff for: kotlin/0387-first-unique-character-in-a-string.kt

@@ -0,0 +1,14 @@
+class Solution {
+    fun firstUniqChar(s: String): Int {
+        var count = IntArray (26)
+        for (c in s)
+            count[c - 'a']++
+
+        for ((i, c) in s.withIndex()) {
+            if (count[c - 'a'] == 1)
+                return i
+        }
+ 
+        return -1
+    }
+}