Level 1: Basics · Exercise 12 of 76 · Free

Anagram check

A JavaScript exercise from Scriptdrill. Solve it with a code editor in your browser that runs your function against example and hidden tests, and it is checked the moment you submit.

The task

Return `true` when `a` and `b` are anagrams: they use exactly the same letters the same number of times. Ignore upper and lower case and ignore spaces, so `"Dormitory"` and `"dirty room"` are anagrams. Two empty strings are anagrams.

What this exercise teaches

Sorting the characters gives every anagram of a word the same spelling, so one comparison settles it. Comparing only which letters occur is not enough: aab and abb use the same letters with different counts.

A hint if you get stuck

Normalize both strings the same way (lowercase, spaces removed), sort their characters and compare the results. Counting characters in an object or a Map works too.