HCLarsen

class Array(T)
	# Returns true if the two arrays share no common elements.
	def disjointed?(other : Array(U)) forall U
		(self & other).size == 0
	end
end

arr1 = [1 ,2 ,3, 4]
arr2 = [3, 4, 5, 6]
arr3 = [5, 6, 7, 8]

HCLarsen

require 'jose'

message = "Jodie Whittaker is the greatest Doctor ever!"

# A128GCM Symmetric Key Encryption/Decryption
puts "-----Symmetric Key Encryption/Decryption-----"
secret = 'some128bitsecret'
jwk = JOSE::JWK.from_oct(secret)
encrypted_a128gcmkw = JOSE::JWE.block_encrypt(jwk, message, { "alg" => "A128GCMKW", "enc" => "A128GCM" }).compact
puts "encrypted JWE: #{encrypted_a128gcmkw}"

HCLarsen

require 'jose'

# HS256 Symmetric Signature
secret = 'some128bitsecret'
jwk = JOSE::JWK.from_oct(secret)
header = { "alg" => "HS256" }
payload    = { "iss" => "Chris Larsen", 
							 "sub" => "JWTs", 
							 "aud" => "Silicon Halton Software P2P", 
							 "iat" => 1540121863 }

HCLarsen

class Gen(T)
  getter value : T

  def initialize(@value : T)
  end

  def self.build(value : K) : Gen(K) forall K
      Gen(K).new(value)
  end

HCLarsen

abort "Need a regex pattern" unless ARGV.size > 0
regex = ARGV.shift

STDIN.each_line do |i|
  puts i if i =~ %r(#{regex})
end

HCLarsen

usage = <<-STRING
Usage: cl-tutorial [option]

Command:
    time, --time, -t         show the current time
    help, --help, -h         show this help
    version, --version, -v   show version
STRING

if ARGV.size == 0

HCLarsen

sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get install software-properties-common

sudo apt-add-repository -y ppa:rael-gc/rvm
sudo add-apt-repository ppa:webupd8team/atom

sudo apt-get update

sudo apt-get install rvm