Re: print hash table to disk and reread in hash table

[Niels Giesen <niels.giesen@gmail.com>]

Xah <xahlee@gmail.com> writes:

> if i have a hash table in elisp, is there a way to save it to disk and
> reread in when starting emacs?
>
> Thanks.
>
>   Xah
> ∑ http://xahlee.org/
>
> ☄

You might use this code (I use it in gimp-mode):

(defmacro gimp-hash-to-list (hash-table)
  (let ((nl (gensym)))
    `(let (,nl)
       (maphash (lambda (k v)
                  (push (list k v) ,nl)) ,hash-table)
       ,nl)))

(defmacro gimp-list-to-hash (list)
  (let ((ht (gensym)))
    `(let ((,ht (make-hash-table)))
       (mapc (lambda (item)
               (puthash (car item) (cadr item) ,ht)) ,list)
       ,ht)))