Showing off some niceties of ruby.

gistfile1.rb

class Person
  attr_reader :name
  
  def initialize(name, height)
    @name = name
    @height = height
  end
  
  def tall?
    @height == "tall"
  end
end

class Population
  def <<(person)
    @people ||= []
    @people << person
  end

  def find
    @people.each do |person|
      return person if yield(person)
    end
  end
end

my_city = Population.new
my_city << Person.new("justin", "tall")
my_city << Person.new("thomas", "short")

tall_person = my_city.find { |person| person.tall? }
thomas = my_city.find { |person| person.name == "thomas" }