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Problem: Valid Anagram

Explore the technique to determine if one string is a valid anagram of another by counting character frequencies efficiently. This lesson helps you implement a JavaScript solution using hash maps to compare the composition of two strings, handle edge cases, and understand the time and space complexity of the approach.

Statement

Given two strings s and t, determine whether t is an anagram of s. Return true if it is, and false otherwise.

An anagram is a word formed by rearranging all the letters of another word, using every letter exactly once.

Note: What if the inputs contain Unicode characters? How would you adapt your solution for that case?

Constraints:

  • 11 \leq s.length, t.length 5×104\leq 5 \times 10^4

  • s and ...