2015-09-02 0:21 GMT+08:00, David Kastrup <d...@gnu.org>: > From (srfi srfi-1): > > (and ...) -> (every identity ... > (or ...) -> (any identity ... > (define (list-of-string? lst) (every string? lst)) > > Of course, this definition returns #t for '() while your definition > returns #f for '(). I'd argue the former is more correct. But of > course you can just write > (define (list-of-string lst) (and (pair? lst) (every string? lst))) > if you want the latter.
Thanks, this is exactly what I need. I love the name "every" and "any", they sound very appropriate. Cheers, Alex
