I have not idea what I am doing, please help me fix my code! I seem to have made some mistakes.

class Document
   attr_accessor :content, :title

  def initialize content = "", title = ""
    @content = content
    @title = title
  end

  def to_s
    "#{title}: #{content}"
  end
end

doc = Document.new
doc.title = "Ruby Exam"
doc.content = "TODO some questions"

puts doc.title
puts doc.content
puts doc

• Use attr_accessor instead of writer so you can read and assign to content and title
• add default parameter values to constructor so you can create a Document without any parameters
• initialise -> initialize

I made a mistake in the RubyExam, can you find it?

class RubyExam
  def initialize
    @score = 0
    @current_question = 1
  end

  def got_one_right
    @score++
    next
  end

  def got_one_wrong
    @score--
    next
  end

  def next
    @current_question++
  end

  def redo
    puts "I made no mistake!"
    @score = 10
  end
  
  def complete
    if @score < 10
      puts 'Game Over'
    else
      redo
    end
    puts "Final Score: #{@score}"
  end
end

exam = RubyExam.new
exam.got_one_right
exam.got_one_wrong
exam.got_one_wrong
exam.complete

Module -> Class

The redo and complete methods feel odd but they work @_@

What are 3 ways to create a new Hash?

• {}
• Hash.new
• [].to_h (this is the best i got, no clue for a third way)

Which of the following are valid for X?

def save!(array)
  raise ArgumentError.new('arg should be array') unless array.is_a?(Array)

  # do stuff ..
rescue __X__
  puts 'Failed to save!'
  puts $1
  puts $1.message
  puts $1.backtrace
  puts $@
end

• Error => e
• nothing
• SystemError => e
• ArgumentError => e
• StandardError => e
• ArgumentError
• => ArgumentError
• => argument_error

What is the correct output for:

d = Date.parse('01-02-99') << 1
p d.to_s

TOTAL GUESS

• "1999-01-02"
• "1998-01-01"
• "1998-12-31"
• "1998-12-01"
• an exception

What is the correct output for:

d = Date.parse('2019-01-31') >> 1
p d.to_s

TOTAL GUESS

• "2018-12-31"
• "2020-01-31"
• "2019-02-31"
• "2019-02-28"
• an exception

What is the correct ways to access the value of this Hash?

toybox = { "doll" => 'Sally' }

• toybox.doll
• toybox['doll']
• toybox["doll"]
• toybox[:doll]
• toybox.try('doll') # Hmmmmmmmmmmmmmmmmmmmm feels like this might be a thing

The following regexp is incorrect please fix it, it should ONLY match:

• .ts
• .ts.erb
• .tsx
• .tsx.erb

/^\.(ts|tsx)?(\.erb)?$/

Here is a good editor for regexp, maybe try and do it without using it first tho: https://rubular.com/

I wasn't able to do this without the cheat sheet from that editor but this is my cheat assisted answer:

^\.(ts|tsx)(\.erb)?$

The problem was the first ? which allowed zero matches of (ts|tsx) (matching ., ..erb, .erb)

Given the following file locations, what are the outputs?

# /User/gollum/precious/ring.rb
File.dirname(__FILE__)

• 'precious'

# /User/tom/junk/ring.rb
File.path(__dir__)

• '/User/tom/junk/'

Write the following method that would give me the correct return value:

bark { "Oki" }
=> "Oki yips!"

def bark
   puts "#{yield} yips!"
end

What is the result of the following:

teams = [['greg', 'bob']]
teams << if teams.size < 2
  ['jim', 'jerry']
elseif teams > 2
  ['sam']
else
  ['tony']
end

p teams.flat_map { |t| t }

elseif should be elsif then the result is: '['greb', 'bob', 'jim', 'jerry']'