Create: 0242-valid-anagram.dart

Author: NikSWE

Diff for: dart/0242-valid-anagram.dart

@@ -0,0 +1,24 @@
+// Time Complexity: O(s + t)
+// Space Complexity: O(1)
+
+class Solution {
+  bool isAnagram(String s, String t) {
+    if (s.length != t.length) return false;
+
+    final counter = List.filled(26, 0);
+
+    for (int i = 0; i < s.length; i++) {
+      counter[s[i].codeUnitAt(0) - 'a'.codeUnitAt(0)]++;
+    }
+
+    for (int i = 0; i < t.length; i++) {
+      counter[t[i].codeUnitAt(0) - 'a'.codeUnitAt(0)]--;
+    }
+
+    for (int val in counter) {
+      if (val != 0) return false;
+    }
+
+    return true;
+  }
+}