If I have the following association list (alist):

(defvar c++-stl-algorithms
'(
("adjacent_difference" "" "Compute the differences
between adjacent elements in a range")
("adjacent_find" "" "Finds two items that are adjacent
to eachother")
))

how can I modify the use of completing-read() to make the function

(defun read-c++-stl-algorithm ()
(let* ((sym (thing-at-point 'symbol))
(cont (completing-read (concat "C++ STL Algorithm (default "
sym "): ")
c++-stl-algorithms nil t nil nil
sym)))
(list cont)))

to instead work on this list of vectors:

On 12 Sep, 12:30, Nordlöw gmail.com> wrote:

Nordlöw gmail.com> wrote:

The easiest way would be just to duplicate the first element in a cons.

(a . [a b c d])

Or use a hash map.

Certainly, you could also write your own completion functions, but it
will be significantly slower, because it's written in lisp. (If speed
that's of any concern...)

Unfortunately, there are few functions capable of working with vectors.
Consequently, They are rarely used. (Consequently, there are few
functions capable of working with them.)

regards,
Nikolaj Schumacher