Week_4_Diagnostic

1. Give one difference between Modules and Classes.
  Modules are static, classes you can manipulate.
  
2. Defining Modules
module Doughy
  def self.has_carbs?
    true
  end
end
class Pizza
  include Doughy
  
  def tasty?
    true
  end
end

3. What are two benefits modules provide us in Ruby? Elaborate on each.
  Modules allow us to call reused methods from one place instead of rewriting them
  Modules don't change so when using them from other classes we know what they will be.

4. What values in Ruby evaluate as “falsy”?
  nil, false, 

5. Give 3 examples of “truthy” values in Ruby.
  0, true, 1.0,"hello", ""

6. List 3 HTTP Verbs
 GET, POST, PUT

7. HTTP Parsing: given the following HTTP Request, identify the following:
  HTTP Verb
    POST
  Request Path
    /students
  Query Parameters
    ?name=horace

8. Git and Branches: give a git command to accomplish each of the following:
  Switch to an existing branch iteration-1
    git checkout iteration-1
  Create a new branch iteration-2
    git checkou -b iteration-2
  Push a branch iteration-2 to a remote origin
    git push origin iteration-2
  Merge a branch iteration-1 into a branch master (assume you are not on master to begin with)
    git merge origin master

9. Load Paths and Requires
Given a project with the following directory structure, give 2 ways that we could require file_one from file_two.
<you are here>
├── lib
│  │── file_one.rb
│  └── file_two.rb
require'./lib/file_one'
require_relative'file_one'

10. Refactoring: given the following snippet of code, show 2 refactorings you might make to improve the design of this code.

class Encryptor
  def date_offset
    date = Time.now.strftime("%d%m%y").to_i
    date_squared = date ** 2
    last_four_digits = date_squared.to_s[-4..-1]
    [last_four_digits[-4].to_i,
    last_four_digits[-3].to_i,
    last_four_digits[-2].to_i,
    last_four_digits[-1].to_i]
  end
end

Encryptor.new.date_offset
-------------------------------------------------------------- 
class Encrytor
  def initialize
   @date = Time.now.strftime("%d%m%y")
  end
  
  def date_squared
    @date.to_i ** 2
  end
  
  def date_offset
    last_four_digits = date_squared.to_s[-4..-1].split("")
    last_four_digits.map do |num|
      num.to_i
    end
  end
end

Encryptor.new.date_offset