UpKoding challange https://www.upkoding.com/proyek/pecahkan-pesan-rahasia-ini-17/

caesar_chiper.rb

def caesar(string, shift = 1)
    alpha_num = 'abcdefghijklmnopqrstuvwxyz1234567890'.split('')
    shifted   = Hash[alpha_num.zip(alpha_num.rotate(shift))]
    
    string.downcase.chars.map { |chr| shifted.fetch(chr, chr) }.join
end

50.times do |index|
    puts caesar('dyvayv9 f6b dr5a a6 b5t6cv9 ayv 0vt9va0 6w ayv b5zcv90v, 69 f6b 1b0a dr5a a6 7b90bv r tr9vv9 z5 ayv ih0a tv5ab9f, sr0zt t647bav9 796x9r44z5x z0 r5 v00v5azr3 02z33 a6 3vr95 - 0av7yv5 yrd2z5x', index)
end
# key     => 18
# message => whether you want to uncover the secrets of the universe, or you just want to pursue a career in the 21st century, basic computer programming is an essential skill to learn - stephen hawking