6 Dec
2010
6 Dec
'10
7:10 a.m.
Here are four problematic expressions.
;; crashes (defun foo () (let ((a (bar)))))
;; syntax err (defun foo () (let* ((a (bar)))))
;; returns nil (defun foo () "bar")
;; doesn't return nil (defun blah () (or (foo) (progn (bar) nil)))