Hash tables

[Nick Roberts]

I am trying to using alists to store information (to display watched expressions
under gdb with the speedbar). I have expressions like:

(dolist (var gdb-var-list)
     (let ((var-list))
       some operation on var...
     (push var var-list))
(setq gdb-var-list (nreverse var-list)))

where var is a list like (varnum a b c d)

Update of the speedbar for arrays and structures is too slow, so I thought
hash tables might speed things up. I want to replace the above with something
like:

(maphash gdb-var-operation gdb-var-table)

The manual says that gdb-var-operation, should accept two arguments KEY and
VALUE.

but I want to pass some arguments to gdb-var-operation. I plan to change
maphash to:

(maphash FUNCTION TABLE &optional ARGS)

so that FUNCTION gets called with KEY, VALUE and ARGS.

This won't be an easy task for me so I'd like some reassurance that its
a) desirable and b) do-able.


Nick