Scheme Lists

cons / car / cdr / nil

1
2
3
4

(null? nil) ; #t
(null? (cons 1 nil)) ; #f
(car (cons 1 2)) ; 1
(list 1 2 3) ; (1 2 3)

Symbolic Programming

Lisp is a symbolic programming language, which uses in AI for a long time…?

注意单引号

1

(car (cdr (car (cdr '(1 (2 3) 4))))) ; 3

List Processing

纯看scheme属实有点抽象了

helper function 化简之

进一步化简

语法稍微了解一些，似乎interpreter才是重点 🤔