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Author: cmcoffeedev

0387-first-unique-character-in-a-string/0387-first-unique-character-in-a-string-04-19-2025-00-36-33.js

@@ -0,0 +1,18 @@
+/**
+ * @param {string} s
+ * @return {number}
+ */
+var firstUniqChar = function(s) {
+    const map = new Map()
+    for(let i = 0;i < s.length;i++){
+        const currentChar = s[i]
+        const count = map.get(currentChar) ?? 0
+        map.set(currentChar, count + 1)
+    }
+    for(let i = 0;i < s.length;i++){
+        const currentChar = s[i]
+        const count = map.get(currentChar) ?? 0
+        if(count == 1) return i
+    }
+    return -1
+};