Class: ArrayAssignmentQuestion

Inherits:
DataStructureAssignmentQuestion show all
Defined in:
lib/battleroom/models/array_assignment_question.rb

Instance Attribute Summary

Attributes inherited from DataStructureAssignmentQuestion

#assignment_key, #assignment_value, #assignment_value_class, #formatted_assignment_value, #replacement_index, #replacement_value_class_formatted, #value_to_replace, #value_to_replace_formatted

Attributes inherited from DataStructureQuestion

#data_structure, #hint, #possible_assignments

Attributes inherited from Question

#answer_value, #data, #data_structure, #data_structure_class, #evaluation_scope, #explanation, #type, #variable_name, #variable_value

Instance Method Summary collapse

Methods inherited from DataStructureAssignmentQuestion

#evaluate_data_structure_assignment_input, #print_resulting_data_structure

Methods inherited from DataStructureQuestion

#convert_keys_to_strings, #cull_hash_to_valid_size_for_output, #find_number_of_boolean_values_in_hash

Methods inherited from Question

#enter_evaluation_loop, generate_question

Constructor Details

#initialize(scope) ⇒ ArrayAssignmentQuestion

Returns a new instance of ArrayAssignmentQuestion.



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# File 'lib/battleroom/models/array_assignment_question.rb', line 8

def initialize(scope)
  super(scope)
  format_array_for_assignment
end

Instance Method Details

#cull_array_to_valid_size_for_output(desired_size) ⇒ Object 



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# File 'lib/battleroom/models/array_assignment_question.rb', line 25

def cull_array_to_valid_size_for_output(desired_size)
  while data_structure.size > desired_size
    new_assignment_possibility = data_structure.delete(data_structure.sample)
    possible_assignments.push(new_assignment_possibility)
  end
end

#evaluate_user_input(user_input) ⇒ Object 



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# File 'lib/battleroom/models/array_assignment_question.rb', line 77

def evaluate_user_input(user_input)
  if handles_user_workarounds(user_input)
    false
  end
  if value_to_replace
    handle_replacement_of_array_value_input(user_input)
  elsif evaluation_scope.eval("#{variable_name}.last == #{formatted_assignment_value}") && user_input.include?(variable_name)
    print_resulting_data_structure
    true
  else
    puts 'Nope! Try again.'.red
  end
end

#format_array_for_assignment ⇒ Object 



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# File 'lib/battleroom/models/array_assignment_question.rb', line 13

def format_array_for_assignment
  desired_array_size = rand(3..6)
  cull_array_to_valid_size_for_output(desired_array_size)
  if [1, 2, 3, 4, 5].sample.odd?
    self.value_to_replace = data_structure.sample
    self.value_to_replace_formatted = format_value_for_stdout_and_eval(value_to_replace)
  end
  self.assignment_value = possible_assignments.sample
  self.assignment_value_class = format_class_for_output(assignment_value.class)
  self.formatted_assignment_value = format_value_for_stdout_and_eval(assignment_value)
end

#handle_replacement_of_array_value_input(user_input) ⇒ Object 



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# File 'lib/battleroom/models/array_assignment_question.rb', line 51

def handle_replacement_of_array_value_input(user_input)
  if evaluation_scope.eval("#{variable_name}[#{replacement_index}] == #{formatted_assignment_value}") && user_input.include?(variable_name)
    print_resulting_data_structure
    true
  else
    puts "\nNope! Here's what the data stucture would look like given your code:\n".red
    resulting_data_structure = evaluation_scope.eval(variable_name)
    ap(resulting_data_structure, { indent: -2, index: false, multiline: true, plain: true })
    puts "\nCheck your index and assignment values and try again.\n".red
  end
end

#handles_user_workarounds(user_input) ⇒ Object 



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# File 'lib/battleroom/models/array_assignment_question.rb', line 63

def handles_user_workarounds(user_input)
  cheater_regex = Regexp.new("#{variable_name}\s+?\=\s+?(\\[)?")
  # checks if user reassigned the variable to a new array of identical values
  if user_input.match(cheater_regex)
    if $1
      puts 'You reassigned the variable to a new array object, when you could have worked with the array provided! Look up Ruby\'s Array#push method and try again!'.red
    else
      puts 'You reassigned the variable '.red + variable_name.green + ' rather than working with the array provided. Try again.'.red
    end
    puts ''
    true
  end
end

#print_data_structure_assignment_prompt ⇒ Object 



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# File 'lib/battleroom/models/array_assignment_question.rb', line 38

def print_data_structure_assignment_prompt
  if value_to_replace
    self.replacement_index = data_structure.index(value_to_replace)
    self.replacement_value_class_formatted = format_class_for_output(value_to_replace.class)
    print_replace_array_value_prompt
  else
    puts "Use an array method to add the #{assignment_value_class} value ".blue + "#{formatted_assignment_value}".yellow + " to the ".blue + "end".blue.underline + " of the Array below.\n".blue
  end
  print "#{variable_name} = ".green
  ap(data_structure, { indent: -2, index: false, multiline: true, plain: true })
  puts ''
end

#print_replace_array_value_prompt ⇒ Object 



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# File 'lib/battleroom/models/array_assignment_question.rb', line 32

def print_replace_array_value_prompt
  puts "Given the data structure below, replace the #{replacement_value_class_formatted} value ".blue +
       value_to_replace_formatted.yellow + " with the #{assignment_value_class} value ".blue +
       formatted_assignment_value.yellow + ".\n\n"
end