Classes & instances

car.rb

# car.rb
# filename - lower_snake_case
# class name - UpperCamelCase
class Car
  attr_reader :brand
  # attr_reader :brand
  # attr_writer :color

  # same as attr_writer + attr_reader
  attr_accessor :color

  # contructor or initializer
  def initialize(color, brand)
    # puts "VROOOOOM"

    # DATA (instance variables)
    @engine_started = false # boolean
    @color = color # String
    @brand = brand # String
  end

  # BEHAVIOUR (instance methods)
  def engine_started?
    @engine_started
  end

  def start_engine
    spark_sparkplugs
    inject_fuel
    make_vroom_sound

    @engine_started = true

    puts "BOOOOOM"
  end

  # from this point on every method is private
  private

  def inject_fuel
    puts "PSSSSSSSSS"
  end

  def spark_sparkplugs
    puts "TSSKKKKKK"
  end

  def make_vroom_sound
    puts "VROOOOOOOOM"
  end

  # explicit getter / reader
  # exactly the same as attr_reader :color
  # def color
  #   @color
  # end

  # def brand
  #   @brand
  # end

  # explicit setter / writer
  # exactly the same as attr_writer :color
  # def color=(color)
  #   @color = color
  # end
end

car_test.rb

# car_test.rb
require_relative 'car'

# create a new Car instance
my_car = Car.new('blue', 'peugeout')
#your_car = Car.new('red')

puts "Car is running? -> #{my_car.engine_started?}"
puts "My car is #{my_car.color} #{my_car.brand}"

# paint my car
# my_car.color=("green")
my_car.color = "green"
# my_car.brand = 'fiat'

#p my_car

#puts "My car is #{your_car.color}"
#my_car.start_engine
#my_car.inject_fuel
#my_car.spark_sparkplugs
#my_car.make_vroom_sound
# puts "Car is running? -> #{my_car.engine_started?}"

debug.rb

require 'pry-byebug'

# 1. gem install pry-byebug
# 2. require 'pry-byebug'
# 3. binding.pry
#
#  commands:
#   * help - list commands
#   * next - stops at next line of code
#   * continue - stops at the end or at another binding.pry

def full_name(first, last)
  first_name = first.capitalize

  # p first_name
  # binding.pry or byebug

  last_name = last.capitalize

  "#{first_name} #{last_name}"
end

puts full_name('ricardo', 'otero')

binding.pry

puts "FINISH!"