Introducing the Secret_knock gem

To get started you will need to refer to the secret knock lookup table as show below:

a: 4     f: 25    k: 35    p: 32    u: 22    z: 43    5: 52  0: 61   
b: 33    g: 26    l: 16    q: 42    v: 34    1: 44    6: 53  [space]: 1
c: 21    h: 13    m: 23    r: 14    w: 24    2: 45    7: 54  <backspace>: 62
d: 15    i: 6     n: 11    s: 12    x: 41    3: 46    8: 55
e: 2     j: 36    o: 5     t: 3     y: 31    4: 51    9: 56

A letter with 2 numbers means that you must knock the specified number of times, then pause for roughly half a second. There is no time limit on how long you take before knocking out your next letter.

require 'io/console'
require 'secret_knock'


c = ' '

sk = SecretKnock.new

sk.listen do |x|

  puts 'press the space bar to knock, or any other key to exit'
  x.knock while (c = $stdin.getch ) == ' '

end

puts "Your message was " + sk.message

Note: While knocking, if you discover that you have knocked out the wrong letter, there is a special knock that acts as a backspace.

press the space bar to knock, or any other key to exit

1 
1 2 3 
1 2 
1 
1 2 3 4 5 6 
1 
1 2 3 4 5 6 
1 2 3 4 5 => "hello"

• secret_knock https://rubygems.org/gems/

secretknock gem