Wizard Class

class_wizard.rb

class Wizard

    attr_accessor :name, :age, :hair_colour, :favourite_spell

    @@all = []

    def initialize(name, age, hair_colour, favourite_spell)
        @name = name
        @age = age
        @hair_colour = hair_colour
        @favourite_spell = favourite_spell
        @@all << self
    end

    def cast_spell
        "#{@favourite_spell}!!!!"
    end

    def self.all
        @@all
    end

end

harry = Wizard.new("Harry Potter", 12, "brown", "Expecto Patronum")
# => <Wizard:0x00007f97ff16b658 @name="Harry Potter", @age=12, @hair_colour="brown", @favourite_spell="Expecto Patronum"> 
harry.cast_spell
# => "Expecto Patronum!!!!"