Lisp土地的例子是什么？
我已经阅读了很多关于Land of Lisp的好东西，所以我想我可以通过它来看看有什么可看的。
(defun tweak-text (lst caps lit)
(when lst
(let ((item (car lst))
(rest (cdr lst)))
(cond
; If item = space, then call recursively starting with ret
; Then, prepend the space on to the result.
((eq item #space) (cons item (tweak-text rest caps lit)))
; if the item is an exclamation point. Make sure that the
; next non-space is capitalized.
((member item '(#! #? #.)) (cons item (tweak-text rest t lit)))
; if item = " then toggle whether we are in literal mode
((eq item #") (tweak-text rest caps (not lit)))
; if literal mode, just add the item as is and continue
(lit (cons item (tweak-text rest nil lit)))
; if either caps or literal mode = true capitalize it?
((or caps lit) (cons (char-upcase item) (tweak-text rest nil lit)))
; otherwise lower-case it.
(t (cons (char-downcase item) (tweak-text rest nil nil)))))))
(list-of-symbols bool-whether-to-caps bool-whether-to-treat-literally)
(lst caps lit)
(cond... (lit ...) ((or caps lit) ...))
if(lit){ ... } else if(caps || lit){...}nil
(or caps lit)
没有找到相关结果
已邀请:
2 个回复
贸会
辅奈
(defun tweak-text (list caps lit) (when list (destructuring-bind (item . rest) list (case item ((#space) (cons item (tweak-text rest caps lit))) ((#! #? #.) (cons item (tweak-text rest t lit))) ((#") (tweak-text rest caps (not lit))) (otherwise (cond (lit (cons item (tweak-text rest nil lit))) (caps (cons (char-upcase item) (tweak-text rest nil lit))) (t (cons (char-downcase item) (tweak-text rest nil nil)))))))))(defun tweak-text (list) (loop with caps and lit for item in list when (eql item #space) collect item else when (member item '(#! #? #.)) collect item and do (setf caps t) else when (eql item #") do (setf lit (not lit)) else when lit collect item and do (setf caps nil) else when caps collect (char-upcase item) and do (setf caps nil) else collect (char-downcase item) and do (setf caps nil lit nil)))