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* Non-matching string failing alist search
@ 2022-08-21 23:38 uzibalqa
  2022-08-22 14:26 ` [External] : " Drew Adams
  0 siblings, 1 reply; 2+ messages in thread
From: uzibalqa @ 2022-08-21 23:38 UTC (permalink / raw)
  To: uzibalqa via Users list for the GNU Emacs text editor


I am adding to a list `scrip' but when `word' is not present in the `car' values 
of `alist-t1' I get an error.  

Debugger entered--Lisp error: 
(void-function nil)  nil(#("yoor" 0 5 (fontified t))) 
replace-regexp-in-string(#("yoor" 0 5 (fontified t)) nil #("yoor" 0 5 (fontified t))) 
(add-to-list 'nscrip

What can I do in the case that the string passed to word does not exist in `alist-t1'?  


    (defconst alist-t1 '( ("year" . "2022") ))

    (add-to-list 'nscrip
       (replace-regexp-in-string
	word (cdr (assoc word alist-t1))
	word))






^ permalink raw reply	[flat|nested] 2+ messages in thread

* RE: [External] : Non-matching string failing alist search
  2022-08-21 23:38 Non-matching string failing alist search uzibalqa
@ 2022-08-22 14:26 ` Drew Adams
  0 siblings, 0 replies; 2+ messages in thread
From: Drew Adams @ 2022-08-22 14:26 UTC (permalink / raw)
  To: uzibalqa, uzibalqa via Users list for the GNU Emacs text editor

> What can I do in the case that the string passed
> to word does not exist in `alist-t1'?
> 
>     (add-to-list
>       'nscrip
>       (replace-regexp-in-string
> 	      word (cdr (assoc word alist-t1)) word))

Do nothing? (Depends what _you_ want to do.)

(let ((x (assoc word alist-t1)))
  (when x
    (add-to-list
      'nscrip
      (replace-regexp-in-string word (cdr x) word))))

^ permalink raw reply	[flat|nested] 2+ messages in thread

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