random_order.rb

# A small snippet in Sonic Pi that lets you randomly select functions 
# from an array, then remove them, and stops the loop when you run 
# out of functions.
#
# The purpose being you can define the sections of your song/composition
# as functions, and then let rPI randomly select the order in which those
# sections happen.
#
# This is part of an exploration for a dance piece I will be choreographing
# for Kanopy Dance Company's April 2016 show.
#
# More info at http://kanopydance.org


define :melody1 do
  play 60, release: 0.5
  sleep 0.5
  play 60+5, release: 0.5
  sleep 0.25
  play 60+10, release: 0.5
  sleep 1
end
define :melody2 do
  play 60, release: 0.5
  sleep 0.5
  play 60-5, release: 0.5
  sleep 0.25
  play 60-10, release: 0.5
  sleep 1
end

# you can fill the array with whatever you want, obviously. Different functions, repeats of the functions, etc.
m_arry = [method(:melody1), method(:melody2),method(:melody1), method(:melody2),method(:melody1), method(:melody2)]

m_index = 0

live_loop :foo do
  if (m_arry.empty?)
    stop
  end
  m_index = rand_i(m_arry.length)
  m_arry[m_index].call
  m_arry.delete_at(m_index)
  puts m_arry.length
end