Generate Unique Random String With Letters And Numbers In Lower Case

Question

How can I fix this code so it generates unique random letters and numbers in lower case?

api_string = (0...32).map{65.+(rand(25)).chr}.join    

Answer 1

This will generate a lower random string from 32 to 50 characters including numbers and letters, both:

require 'string_pattern'

puts "32-50:/xN/".gen