Time: 30 ms (80.49%), Space: 53.6 MB (60.98%) - LeetHub

Author: chappdev2019

0387-first-unique-character-in-a-string/0387-first-unique-character-in-a-string.js

@@ -0,0 +1,15 @@
+/**
+ * @param {string} s
+ * @return {number}
+ */
+var firstUniqChar = function(s) {
+    let map = new Map();
+    for (let i = 0; i <s.length; i++) {
+        let v = (map.get(s[i])|| 0)
+        map.set(s[i],v+1);
+    }
+    for (let [k,v] of map.entries()) {
+        if (v == '1') return s.indexOf(k);
+    }
+    return -1;
+};