What does a normal variable defined inside a Ruby class mean? -

from understand, in ruby class variables preceded @@ while instance variables preceded @. mean if they're defined inside class body without being preceded anything?

class myclass   some_var = 'hello' end 

what some_var refer in case?

it local variable. see official documentation "local variables".

local variables, when declared within scope of class, evaluated whenever class loaded. try run this:

class myclass     bad_idea = 1/0      def initialize         puts "this silly #{bad_idea}"     end end  puts "i told wouldn't work!" 

you'll zerodivisionerror: divided 0 , "i told wouldn't work!" never printed.