I'm having second thoughts on how to do an INCLINE function in LISP programming. I can name someone, but I can not add some additional information.
The role will include additional information for a person in a list. Follow the code:
(setq AGENDA 'nil)
(setq AGENDA ( incluir AGENDA '(Isabel 3233876)))
This include I can not do.
In Lisp, a list has two parts: the "head" ( car ) and the "tail" ( cdr ). The head is a common element of the list, and the tail is the rest of the list (or nil , if the list is over). You can create a list implicitly by using:
(a b c d)
Or explicitly, using . :
(a . (b . (c . (d . nil))))
So, if your AGENDA list contains nil , and you want to add an element to it, replace it with a new list, with the new element in the head and the old element in the tail:
(setq AGENDA '(("Isabel" 3233876) . ,AGENDA))
All that remains is to turn it into a function:
(defun incluir (lista elemento) '(,elemento . ,lista))
(setq AGENDA (incluir AGENDA '("Isabel" 3233876)))
Example in ideone . Q. I have little experience with Lisp, there is certainly a simpler way of creating these lists without being backtick / comma, but I do not remember ...