func.rb

def func(line)
  $myVar = []
    
  comms = line.split(" ")[0]
  case comms[0]
  when "classA"
    $myVar = classA.new(comms[1])
  when "doB"
    b = ClassB.new("abc")
    $myVar.add(b) #I am having error in this line. Add is a function of class A, but here its giving nil error
  end
  
    
end