Create firstUniqueChar.py

Author: kanglicheng

Kangli/Strings/firstUniqueChar.py

@@ -0,0 +1,11 @@
+class Solution(object):
+    def firstUniqChar(self, s):
+        d={}
+        for c in s:
+            d[c] = 1 if c not in d else d[c] +1 
+        for i, c in enumerate(s):
+            if d[c] == 1:
+                return i
+        return -1
+
+#build a hash of letter counts, then iterate through s and check count, return index of first letter with count = 1.