cheeyeo

# Other syntax without patch
STUDENT_LEVELS = {
  freshman:  Student::Underclassman,
  sophomore: Student::Underclassman,
  junior:    Student::Upperclassman,
  senior:    Student::Upperclassman,
  graduate:  Student::Graduate
}.tap { |h| h.default = Student::Unregistered }

cheeyeo

STUDENT_LEVELS = Hash.new(Student::Unregistered).merge(
    freshman:  Student::Underclassman,
    sophomore: Student::Underclassman,
    junior:    Student::Upperclassman,
    senior:    Student::Upperclassman,
    graduate:  Student::Graduate
  )

klass = STUDENT_LEVELS[params[:student_level]]
student = klass.new(name, birthdate, address, phone)

cheeyeo

• Logspout - for logging output from containers
• Ansible semaphore - UI console for running ansible tasks
• User namespaces in Docker
• Linux manpages for User namespaces

cheeyeo

Search for password entropy

Some links

• http://bredsaal.dk/calculating-password-entropy-in-python
• http://www.unix-ninja.com/p/A_guide_to_password_cracking_with_Hashcat/

cheeyeo

class decisionnode:
    def __init__(self,col=-1,value=None,results=None,tb=None,fb=None):
        self.col=col # column index of criteria being tested
        self.value=value # vlaue necessary to get a true result
        self.results=results # dict of results for a branch, None for everything except endpoints
        self.tb=tb # true decision nodes
        self.fb=fb # false decision nodes


# Divides a set on a specific column. Can handle numeric or nominal values

cheeyeo

import re
from math import log,pow

class PasswordStrength:
    def __init__(self):
        self.numeric=re.compile('\d')
        self.loweralpha=re.compile('[a-z]')
        self.upperalpha=re.compile('[A-Z]')
        self.symbols=re.compile('[-_.:,;<>?"#$%&/()!@~]')
        self.num_of_symbols=20 # adjust accordingly...

cheeyeo

def count_nodes(label)
  before = ObjectSpace.count_objects
  yield
  after = ObjectSpace.count_objects

  puts "  #{label} created T_NODE: %d" % (after[:T_NODE] - before[:T_NODE])
end

class MyClass
  include Enumerable

cheeyeo

defmodule ExUnit.Lets do
  defmacro __using__([]) do
    quote do
      import ExUnit.Lets
    end
  end

  defmacro let(name, expr) do
    if match?([do: _], expr) do
      expr = expr[:do]

cheeyeo

See https://www.youtube.com/watch?v=4_RJu_TrqO0&feature=youtu.be&t=8h6m40s

$ ruby dilute.rb fib.rb
def fi  n
  if n < 3
    1
  else
    fib(n-1  +  ib(n
 end

cheeyeo

http://geekhmer.github.io/blog/2015/02/19/ruby-on-rails-model-change-tracking-with-activemodel-dirty/

http://ruby-journal.com/how-to-track-changes-with-after-callbacks-in-rails-3-or-newer/

https://github.com/rails/rails/blob/0450642c27af3af35b449208b21695fd55c30f90/activerecord/lib/active_record/attribute_methods/dirty.rb

http://codebeerstartups.com/2012/11/track-changes-in-your-active-record-object-using-dirty-objects-in-rails/