refactoring

order.rb

def order(n)
  i=1, a=1, list=[]

  until (i==61 or a==n) do
    if (a^i).modulo(n)==1 
      [a,i]>>list 
      a+=1 
      i=1
    else
      i+=1
    end
  end

  return list
end

def order(n)
  i = a = 1, list = []

  until (i == 61 || a == n) do
    if (a ^ i).modulo(n) == 1 
      list << [a,i] 
      a += 1 
      i = 1
    else
      i += 1
    end
  end

  list
end

def order(n)
  i = a = 1

  [].tap do |list|
    until (i == 61 || a == n) do
      if (a ^ i).modulo(n) == 1 
        list << [a ,i] 
        a += 1 
        i = 1
      else
        i += 1
      end
    end
  end
end