Valid Anagram Visualizer: HashMap Frequency Count

Valid Anagram: how it works

Two strings are anagrams if one is a rearrangement of the other. The hash map approach counts character frequencies in S, then decrements for each character in T. If all counts reach zero, they are anagrams.

1. Count Phase (S)

   Iterate through string S. For each character, increment its count in the frequency map.

2. Verify Phase (T)

   Iterate through string T. For each character, decrement its count. If a count goes below zero or the character is missing, return false.

3. Result

   If all frequency map entries are zero after processing T, the strings are anagrams. Time: O(n), Space: O(n).