valid-anagram: solve problem

Author: Invidam

valid-anagram/invidam.go

@@ -0,0 +1,23 @@
+func isAnagram(s string, t string) bool {
+	freqS := make(map[rune]int, 26)
+	freqT := make(map[rune]int, 26)
+
+	for _, ch := range s {
+		if _, ok := freqS[ch]; ok {
+			freqS[ch]++
+		} else {
+			freqS[ch] = 1
+		}
+	}
+	for _, ch := range t {
+		freqT[ch]++
+	}
+
+	for ch := 'a'; ch <= 'z'; ch++ {
+		if diff := freqS[ch] - freqT[ch]; diff != 0 {
+			return false
+		}
+	}
+
+	return true
+}