Data Structures & Algorithms using JavaScript
/Intermediate
Anagram Problems
Definition
Two strings are anagrams if they contain the exact same characters with the same frequencies. Solved efficiently in O(N) time using a fixed-size integer array of length 26 (Frequency Counter) for lowercase English letters.
Explain Like I'm New
Checking if you can rearrange the letters of 'LISTEN' to spell 'SILENT'.
Interactive Coding Challenges
Valid Anagram (Frequency Counter)
Solution Code
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O(N) Time, O(1) Space (since max 26 characters).