通俗Lisp雜記

等同性

1. eq - test if two are the same object
2. eql - test if two are of same type
3. equal - test if two represent the same structure and contents recursively
4. equalp - less discriminating

結構

  (defstruct person
   name
   age
   sex)

 (let ( (p (make-person
            :name "Kevin"
            :age 20
            :sex "Male")) )
   (person-name p) ;; Kevin
   (person-age p) ;; 20
   (person-sex p) ;; Male
 )

變數

1. use defparameter or defvar to set global variable
2. setq - set quoted blah
3. setf - set a field
4. use let or let* to create local scope and local variables
5. use flet to create local function and local scope

串列操作

1. basic: cons, car & cdr
2. nth - get nth element
3. push