Thanks for the response.
I'm afraid my initial post wasn't clear as it could be. I am trying to
find a specific syntax to access an accessor getter/setter using a
variable, in this example "x":

user = User.new(:login=> "foo", :password=>"bar")  # :password is not
a column in the db, but defined in the model using
"attr_accessor :password" (see initial post)

[:login, :password].each do |x|
    original_val = user[x]
    user[x] = some_new_val
    do_some_test(user)
    user[x] = original_val
end

It works for :login which is an actual attribute of User. However,
since :password was created as an attribute accessor (def password &
def password=), the syntax "user[e]" doesn't work. I'm looking for a
way to make this work while keeping "attr_accessor :password"

I hope this is clearer.
Thanks for the assist.

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