derp.rb

class Person
  #have a first_name and last_name attribute with public accessors
  #attr_accessor 
  public
    attr_accessor :first_name, :last_name

  #have a class attribute called `people` that holds an array of objects
  @@people = []

  #have an `initialize` method to initialize each instance
  def initialize(first_name,last_name) #should take 2 parameters for first_name and last_name
    #assign those parameters to instance variables
    @first_name = first_name
    @last_name = last_name
    #add the created instance (self) to people class variable
    @@people << self 
  end

  #have a `search` method to locate all people with a matching `last_name`
  def self.search(last_name)
    #accept a `last_name` parameter
    new_array = @@people.select! { |people_last_name| people_last_name == last_name }
    #search the `people` class attribute for instances with the same `last_name`
    #return a collection of matching instances
  end

  #have a `to_s` method to return a formatted string of the person's name
  def to_s
    #return a formatted string as `first_name(space)last_name`
  end
end

p1 = Person.new("John", "Smith")
p2 = Person.new("John", "Doe")
p3 = Person.new("Jane", "Smith")
p4 = Person.new("Cool", "Dude")

puts Person.search("Smith")

# Should print out
# => John Smith
# => Jane Smith