Re: How to store list of variable values into another dynamically created variables

[Stefan Monnier <monnier@iro.umontreal.ca>]

> Your save and restore functions are then dead easy:
>
> #+begin_src emacs-lisp
> (defun mu4e-save (l)
>        (mapcar (lambda(x) (set (cdr x) (symbol-value (car x)))) l))
>
> (defun mu4e-restore (l)
>  (let ((lrev (mapcar (lambda(x) (cons (cdr x) (car x))) l)))
>        (mu4e-save lrev)))

FWIW, in most of the minor modes where I've needed such a thing, I found
it more convenient to use a single "save" variable, e.g. something like:

    (defvar FOO--saved-vals nil)

    (define-minor-mode FOO-mode
      "blabla FOO blabla"
      ;; Revert to original values.
      (dolist (x (prog1 FOO--saved-vals (setq FOO--saved-vals nil)))
        (if (consp x)
            (set (car x) (cdr x))
          (mkunbound x)))
      ;; Set minor mode's values.
      (when FOO-mode
        (setq FOO--saved-vals
              (mapcar (lambda (v)
                        (if (boundp v) (cons v (symbol-value v)) v))
                      '(mu4e-headers-seen-mark
                        ...
                        mu4e-headers-duplicate-prefix)))
        ..etc..))


-- Stefan