gistfile1.txt

module SessionsHelper
   
  def sign_in(user)
    cookies.permanent.signed[:remember_token] = [user.id, user.salt]
    self.current_user = user
  end
  
  def current_user=(user)
    @current_user = user
  end
  
  def current_user
    @current_user ||= user_from_remember_token
  end

# From a tutorial, why wouldn't current_user= be defined as self.current_user= or why isn't self.current_user = user , current_user = user.

If self.current_user were implemented like so:

def current_user=(user)
  self.current_user = user
end

Then you would have an infinitely-recursing method, no bueno.

And if you had this:

def current_user=(user)
  current_user = user
end

Then you would only be assigning current_user as a local variable within that method.