In which an object responds to its printer five different ways.

multiprint.rb

require 'pp'

class Thing
  def to_s
    case caller[0]
    when /write/ then 'print'
    else 'puts'
    end
  end

  def inspect
    case caller[0]
    when /pretty/ then 'pp'
    else 'p'
    end
  end
  
  def text arg
    puts 'pretty_print'
  end
end

t = Thing.new

p t
pp t
print t
pretty_print t
puts t

require 'pp'

class Thing
  def pretty_print(q)
    q.text("pretty print")
  end
end

pp Thing.new