AI solution for JavaScript Quiz on BFE.dev
78. RegExp

The code outputs an array of strings containing only lowercase letters from the original array arr. In this case, it would log ['a', 'b', 'c']. The regular expression /^[a-z]$/gi matches any string that starts with a lowercase letter from a-z and ends with the same. The filter() method filters out any element in the original arr that doesn't match the regular expression.