Problem Statement

A pangram is a sentence that contains all the letters of the English alphabet at least once. For example:   The quick brown fox jumps over the lazy dog.

Write a function or method to check a sentence to see if it is a   pangram   (or not)   and show its use.

Let's start with the solution:

(function pangram? sentence
  (let prepped (-> sentence lower-case to-vec))
  (all? prepped (map char-code (range 97 123))))

(pangram? "The five boxing wizards jump quickly.")