tower_of_hanoi.rb

a = [1,2,3,4]
b = []
c = []

all = [a, b, c]

def aab_move(a, b, c)
  b.unshift(a.first)
  a.shift  
  c.unshift(a.first)
  a.shift
  c.unshift(b.first)
  b.shift
end

def find_empty_array(a,b,c,all)
  empty_array=[]
  all.each{|peg| empty_array=peg if peg.empty?}
  return empty_array 
end

def includes_3(a, b, c, all)
  array_3=[]
  all.each{|peg| array_3=peg if peg.include?(3)}
  return array_3  
end

def move_to_empty(a, b, c, all)
  empty_array = find_empty_array(a,b,c,all)
  array_3 = includes_3(a,b,c,all)
  empty_array.unshift(array_3.first)
  array_3.shift
end

def c_to_a(a,c)
  a.unshift(c.first)
  c.shift
end

def set_1(a, b, c, all)
  aab_move(a, b, c)
  move_to_empty(a,b,c, all)
  c_to_a(a,c)
end

puts "Tower in the beginning:"
puts "This is A: #{a}"
puts "This is B: #{b}"
puts "This is C: #{c}"
set_1(a,b,c,all)
b.unshift(c.first)
c.shift
set_1(a,b,c,all)
c.unshift(b.first)
b.shift
aab_move(a, b, c)
puts "Tower in the end:"
puts "This is A: #{a}"
puts "This is B: #{b}"
puts "This is C: #{c}"