生成伪随机字符串AZ,0-9

Question

我怎么能只生成含有n个字符的伪随机字符串A-Z,0-9像SecureRandom.base64没有"+","/"和"="？例如:

(0..n).map {(('1'..'9').to_a + ('A'..'Z').to_a)[rand(36)]}.join

Answer 1

Array.new(n){[*"A".."Z", *"0".."9"].sample}.join