Browse 3 notes tagged string.
Keep the submitted cleaned-string solution, then explain an in-place charCodeAt-based two-pointer alternative.
Work through a sorting-based Group Anagrams solution, its repeated-array-copy cost, and a count signature for the fixed lowercase alphabet.
Compare sorting, Map-based frequency differences, and a fixed-size count array for Valid Anagram, including correctness, invariants, and complexity.
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