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Determine if two strings are an anagram

The anagram test is commonly used to demonstrate how an naive implementation can perform significant order of magnitudes slower than an efficient one. We’ll also briefly go over why each implementation is not as efficient as you could make it.

A word is an anagram of another if you can rearrange its characters to produce the second word. Here we’ll write multiple increasingly more efficient functions that given two strings determines if they are anagrams of each other.

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