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3
Without looking up any of the Org variables or functions you refer to, here's a guess at what you're trying to do. They both do the same thing: iterate over a list of file names, expanding them in directory org-gtd-folder, and setting the value of variable org-agenda-files to the resulting list of absolute file names.
;; Use `mapcar'
(setq org-agenda-files
...
3
You're essentially saying you want to match any of a list of patterns.
regexp-opt takes a list of strings and produces a single regexp which matches any of them.
(regexp-opt '("no" "nix"))
=> "\\(?:n\\(?:ix\\|o\\)\\)"
Note that the individual strings in the input list are not regexps -- the end result will be analogous to ...
3
(seq-filter
(lambda (x) (and (not (string-match-p (regexp-quote "no") x))
(not (string-match-p (regexp-quote "nix") x))))
se-have)
Or use cl-remove-if-not. Or use seq-filter or cl-remove-if-not twice, instead of and. And so on.
1
Note: A Lisp program should not try to modify self-evaluating forms or constant lists (bug#40671). These are internal data structures [Message 42].
Be aware that the final argument for append is not copied.
ELISP> (setq var1 (vector 'a 'b))
ELISP> (symbol-value 'var1)
[a b]
ELISP> (setq lst (append var1 (list 1)))
ELISP> (symbol-value 'lst)
(a b ...
4
You can use the backquote mechanism in combination with ,@ to splice the value of a variable into a list; or equivalently, use append:
(setq variable '(1 2 3))
(1 2 3)
(setq another-variable `(-2 -1 0 ,@variable 4 5 6))
(-2 -1 0 1 2 3 4 5 6)
;; or...
(setq another-variable (append '(-2 -1 0) variable '(4 5 6)))
(-2 -1 0 1 2 3 4 5 6)
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