try_ruby_550.md

lang	EN
title	It's All About Combining
answer	-
ok	Moody!
error
load	prev

Some beautiful things can be done with the simple parts of Ruby, especially when you combine them together into new things. Here we've got an app made of a class containing another class. And, actually, Ruby really does good with this kind of creature. It is called object oriented programming.

We have arrived at the last programming excercise of TryRuby. If you want, you can add some more features to Blurbalizer^TM.

Maybe you want to print the mood as a smiley in the show_timeline method. You could add a moodify method to the Blurb^TM class and then use that method in the show_timeline method:

class Blurb
  attr_accessor :content, :time, :mood

  def initialize(mood, content="")
    @time    = Time.now
    @content = content[0..39]
    @mood    = mood
  end

  def moodify
    if    @mood == :sad
      return ":-("
    elsif @mood == :happy
      return ":-)"
    # Add other moods here
    end

    # The default mood
    ":-|"
  end
end

class Blurbalizer
  def initialize(title)
    @title  = title
    @blurbs = []
  end

  def add_a_blurb(mood, content)
    @blurbs << Blurb.new(mood, content)
  end

  def show_timeline
    puts "Blurbalizer: #{@title} has #{@blurbs.count} Blurbs"

    @blurbs.sort_by { |t|
      t.time
    }.reverse.each { |t|
      puts "#{t.content.ljust(40)} #{t.time}"
    }
  end
end

myapp.show_timeline